bluuebunny/crossref_metadata_2025 huggingface dataset:
Incidencia de las actividades comunes en la calidad de la comunicación entre jefe y subordinado en las empresas privadas
Authors: Maguiña Rivero Omar Fabricio , Obando Peralta Ena Cecilia , Reyes Pastor Graciela Esther
Published: July 2021

Objetivo: Determinar la relación entre las actividades comunes entre el jefe y los subordinados con la calidad de la comunicación entre estos en las empresas privadas. Método: La investigación fue cuantitativa no experimental y transversal; de alcance correlacional. La población estuvo integrada por personas de la ciudad de Trujillo pertenecientes a la población económicamente activa ocupada del año 2020. La muestra fue de 384 personas pertenecientes a la población económicamente activa ocupada de la ciudad de Trujillo del año 2020. Resultados: El 43.0% de los trabajadores encuestados presentan una percepción en nivel alto de la calidad de la comunicación y el 62% de los trabajadores estiman las actividades comunes en un nivel alto. Conclusión: La relación entre las actividades comunes entre el jefe y los subordinados con la calidad de la comunicación en las empresas privadas fue altamente significativa obteniéndose un coeficiente de Spearman (r = 0,619), lo que demuestra que a mayor participación del jefe en actividades que realizan los subordinados, mayor calidad de la comunicación entre estos; confirmándose la hipótesis de investigación.
Estilo de liderazgo predominante en los empresarios agrícolas de la provincia de Chiclayo, región Lambayeque- Perú
Authors: Loli Pineda Alejandro E. , García Rojas Gloria E.
Published: July 2021

Estudiar los estilos de liderazgo exige revisar una amplia literatura tratada en todo el mundo y por mucho tiempo con la intención de comprender la conducta del líder, y sin duda que se seguirá investigando en los diversos sectores sociales, económicos y políticos. El presente estudio tuvo como objetivo determinar el estilo de liderazgo predominante en una muestra de 270 empresarios agrícolas de la provincia de Chiclayo del Perú, como parte de un estudio macro, impulsado por la ONG Asociación de Agropecuarios La Montería – ASPAM. Se aplicó la versión adaptada al español del Multifactor Leadership Questionnaire - MLQ, construido por Avolio y Bass; posteriormente adaptado por Castro , Nader y Casullo en el 2004 y denominado CELID-A (cuestionario de los estilos de liderazgo-Autoliderazgo) (Solano, 2018). Los resultados indican como estilo de liderazgo predominante al estilo transformacional, puntuando bajo los estilos de liderazgo transaccional y el estilo Laissez-Faire. Permitió también conocer la asociación e interdependencia de los estilos transformacional, transaccional y el estilo laissez-faire. Así mismo, un análisis de dichas variables con los datos sociodemográficos permitió encontrar algunas asociaciones significativas.
Adaptación, validez y fiabilidad del inventario ansiedad rasgoestado para adultos de la ciudad de Trujillo
Authors: Bazán Izquierdo Lili Claudina
Published: July 2021

El Inventario de Ansiedad Rasgo-Estado (IDARE) ha demostrado apropiados niveles de validez y fiabilidad para su uso en diferentes países, sin embargo, aún no se presentan evidencias para su uso en adultos de la ciudad de Trujillo. El objetivo del estudio fue adaptar y validar el IDARE en una muestra de adultos. La muestra se conformó por 120 padres (96 mujeres y 24 hombres) con una edad media de 35.18 años. Los resultados indicaron que el instrumento presenta garantías de validez basadas en el contenido y en la revisión de expertos sus ítems manifestaron ser claros, coherentes y relevantes (VAiken > .70, p < .05). Una segunda versión del IDARE, con 37 ítems (3 menos en la dimensión ansiedad rasgo), reportó mejores índices de ajuste (x2/gl = 1.74; RSMEA = .080 (IC 95% = .072 - .088); SRMR = .096; CFI = .988 y TLI = .987), con ítems pertinentes en la medida de cada dimensión (λ > .40) y fiabilidad aceptable en ambas dimensiones, ansiedad estado y ansiedad rasgo (ω > .70). Estos resultados demuestran que el IDARE puede ser aplicado en la población estudiada con ligeras modificaciones de la versión original.
El efecto anorexígeno de la grelina intra-mesopallium está relacionado con niveles elevados de corticosterona plasmática en pollos parrilleros durante la primera semana de vida
Authors: Gastón María Soledad , Cid Mariana Paula , Salvatierra Nancy Alicia
Published: July 2021

La grelina es principalmente un péptido secretado principalmente en el estómago que actúa sobre el sistema nervioso central para regular el metabolismo energético y las respuestas al estrés. En el pollo disminuye la ingesta de alimentos y se ha sugerido que la hormona liberadora de corticotropina podría mediar esta respuesta. En el presente estudio se estudia si la anorexia inducida por grelina intra-mesopallium podría involucrar la activación del eje hipotalámico pituitario adrenal en pollos de 4-6 días de edad. Los resultados demuestran que la grelina, administrada en el mesopallium intermedio, disminuyó la ingesta de alimentos y aumentó los niveles plasmáticos de corticosterona. Además, se observó una relación negativa significativa entre ambas respuestas, donde mayores concentraciones de corticosterona estuvieron asociadas a una menor ingesta de alimentos. Sin embargo, no se observaron cambios significativos en los niveles plasmáticos de la hormona adrenocorticótropa inducidos por la grelina intra-mesopallium. Por lo tanto, esta activación suprarrenal podría desempeñar un papel mediador en el efecto anorexigénico de la grelina central en pollos de engorde. Además, no puede descartarse que esta área del prosencéfalo y el eje hipotalámico pituitario adrenal puedan constituir una red cerebral para el control de la alimentación de pollos parrilleros.
Evaluación de técnicas coprodiagnósticas para Toxocara canis
Authors: Cárdenas Camacho Jessica , Lesmes Infante Karen Isabel , Torres Tocasuche Marly Carolina , Alcantara-Neves Neuza Maria , Jaramillo Hernández Dumar Alexander
Published: July 2021

El estudio tuvo como objetivo evaluar la sensibilidad de técnicas coprodiagnósticas para determinar cuantitativamente la presencia de huevos de Toxocara canis en muestras de heces frescas de caninos. Para ello, se extrajeron huevos del útero de hembras adultas de T. canis obtenidas de cachorros caninos. Se utilizaron ocho concentraciones de huevos (10, 50, 75, 100, 250, 500, 750 y 1 000 huevos por gramo de materia fecal – hpg), siendo considerados como el gold standard para determinar el grado de precisión de las técnicas Kato-Katz, McMaster, McMaster modificado mejorado y Faust. Se utilizaron tres repeticiones por técnica y por concentración. La sensibilidad de cada prueba se realizó mediante el cálculo aritmético y curva ROC (IC95%), comparándolas con el gold standard mediante una prueba no paramétrica de los rangos con signo de Wilcoxon (p<0.05). La técnica Faust detectó huevos de T. canis sin importar la concentración, pero en desigualdad estadística con el gold standard (p<0.001 a p<0.0001). La técnica Kato-Katz no presentó diferencias significativas con el gold standard, pero no detectó la presencia de huevos de T. canis en 10 y 50 hpg, mientras que la técnica McMaster modificado mejorado presentó similitud con el gold estandar en 100 y 250 hpg. El método de McMaster detectó huevos a partir de 100 hpg, obteniendo valores de hpg por debajo del gold standard (p<0.05 y p<0.001). Se obtuvieron sensibilidades de 74.72% (IC95% 72.93-80.22) para la técnica de Kato-Katz y entre 30 y 40% (IC95% 26.71-48.29) para las demás pruebas. Se concluye que la técnica Kato-Katz obtuvo un mejor desempeño en sensibilidad diagnóstica cuantitativa constante al comprarse con técnicas cotidianas cuantitativas de diagnóstico coprológico en laboratorios veterinarios para huevos de T. canis en muestras de heces frescas de canes.
Seroprevalencia de anticuerpos contra el virus de la diarrea viral bovina en bovinos de crianza extensiva en tres distritos de Ayacucho, Perú
Authors: Arbulú-García Catherine , Morales-Cauti Siever
Published: July 2021

El presente estudio tuvo por objetivo determinar la seroprevalencia de anticuerpos contra el virus de la diarrea viral bovina (VDVB) en los distritos de Chumpi, Coracora y Pullo, región de Ayacucho, en marzo de 2018. Se recolectaron 460 muestras de sangre de bovinos de ambos sexos y mayores de cuatro meses de comunidades campesinas con manejo extensivo. Las muestras de suero fueron analizadas mediante un kit comercial de ELISA indirecta. El 82.56 ± 3.44% (367/460) de los animales presentaron anticuerpos contra el VDVB, presentándose en Pullo la mayor prevalencia corregida (89.74 ± 2.75%; 83/96). La alta prevalencia corregida que se reporta evidencia una amplia distribución de la enfermedad.
Evaluación de alfacipermetrina para el control de ácaros en gallinas ponedoras en condiciones de laboratorio
Authors: Rodríguez García Daisy , García Ferrer Yenisey , Valdés Fraga Lissette , Correoso Mendoza Odalys , González Navarrete Maylin , Valdés Rodríguez Mario
Published: July 2021

El objetivo del estudio fue evaluar dosis de alfacipermetrina para el control del ácaro Pterolichus obtusus en gallinas ponedoras en condiciones de laboratorio. El experimento se realizó en las naves experimentales del Instituto de Investigaciones Avícolas, Cuba, entre junio y julio de 2019. Se emplearon 115 gallinas ponedoras White Leghorn de 52 semanas de edad infestadas naturalmente con el ácaro. Se realizó un muestreo inicial a todas las aves para determinar los niveles de infestación y distribuirlas en grupos homogéneos. Se ensayaron cuatro dosis de alfacipermetrina (1, 2, 5 y 10 ml/l) mediante baños de aspersión y se comparó con un grupo tratado con cipermetrina (12 ml/l) y un grupo control. Se efectuaron tres baños con frecuencia semanal. La efectividad de los tratamientos se evaluó entre 24 y 48 horas pos-tratamiento. La alfacipermetrina en dosis de 1 y 2 ml/l no resultó efectiva, mientras que en dosis de 5 y 10 ml/l fue altamente efectiva. La cipermetrina en dosis de 12 ml/l resultó altamente efectiva a partir del segundo baño.
Philosophy and the Implementation of Marxism-Leninism in Lithuania’s Higher Education Institutions from 1944 to 1947
Authors: Peluritis Laurynas
Published: July 2021

The article examines the introduction of Soviet Marxism (Marxism-Leninism) into the Lithuanian higher education system in 1944–1947. Based on archival sources and existing historiography, this paper explores the development of the higher education system in Lithuania during the first years of the Soviet occupation, including the translation, publication, and dissemination of ideological texts. It is argued that the introduction of Soviet Marxism in Lithuanian higher education institutions in 1944–1945 was carried out in a forced and chaotic manner, the organization of teaching and the preparation of ideological literature was slow, and there was a lack of staff to teach ideological courses. First came the creation of formal institutions (departments, divisions, institutes), and only then a consistent introduction of Marxist-Leninist teachings and the implementation of ideological control.
What Does It Mean: „Only History Could Explain It“?
Authors: Lübbe Hermann , Šepetys Nerijus
Published: July 2021

Tekstą iš vokiečių kalbos vertė ir pratarmę parašėNerijus Šepetys
Teaching Parents to Be Responsive: A Network Meta-analysis
Authors: Sokolovic Nina , Rodrigues Michelle , Tricco Andrea C. , Dobrina Roksana , Jenkins Jennifer M.
Published: July 2021

CONTEXT:

Children who receive more responsive care during their early childhood tend to exhibit stronger cognitive development, mental well-being, and physical health across their life course.

OBJECTIVE:

Determine how to design effective responsivity training programs for caregivers.

DATA SOURCES:

We searched seven electronic databases through October 2020.

STUDY SELECTION:

Randomized trials (k = 120) of programs training parents of children ages 0 to 6 to be more responsive.

DATA EXTRACTION:

Two reviewers independently extracted data. Data were pooled by using random-effects pairwise and network meta-analyses.

RESULTS:

Programs had, on average, a medium effect (d = 0.56; 95% confidence interval [CI]: 0.47 to 0.65). The most effective programs included didactic teaching and opportunities for parents to observe models, practice skills, and receive feedback (d = 1.07; 95% CI: 0.37 to 1.77), or all these instructional methods in addition to reflection (d = 0.86; 95% CI: 0.64 to 1.09). Programs that had participants observe examples of responsivity (d = 0.70; 95% CI: 0.57 to 0.83), used researchers as facilitators (d = 0.89; 95% CI: 0.66 to 1.12), assigned homework (d = 0.85; 95% CI: 0.66 to 1.02), and had a narrow scope (d = 0.72; 95% CI: 0.57 to 0.87) were more effective than those that did not.

LIMITATIONS:

Most samples included only mothers from Western countries and lacked follow-up data.

CONCLUSIONS:

Having parents observe examples of responsive caregiving and complete home-practice in short, focused programs may be an effective, scalable approach to enhancing responsivity in the general population and reducing inequalities in child development.
Door-to-balloon Time for ST-elevation MI in the Coronavirus Disease 2019 Era
Authors: Mously Haytham , Shah Nischay , Zuzek Zachary , Alshaghdali Ibrahim , Karim Adham , Jaswaney Rahul , Filby Steven J , Simon Daniel I , Shishehbor Mehdi H , Forouzandeh Farshad
Published: July 2021

In patients presenting with ST-elevation MI, prompt primary coronary intervention is the preferred treatment modality. Several studies have described improved outcomes in patients with door-to-balloon (D2B) and symptom onset-to-balloon (OTB) times of less than 2 hours, but the specific implications of the coronavirus disease 2019 (COVID-19) pandemic on D2B and OTB times are not well-known. This review aims to evaluate the impact of COVID-19 on D2B time and elucidate both the factors that delay D2B time and strategies to improve D2B time in the contemporary era. The search was directed to identify articles discussing the significance of D2B times before and during COVID-19, from the initialization of the database to December 1, 2020. The majority of studies found that onset-of-symptom to hospital arrival time increased in the COVID-19 era, whereas D2B time and mortality were unchanged in some studies and increased in others.
Análisis de la brecha salarial entre el sector público y el sector privado en Costa Rica: evidencia hallada con base en las encuestas de hogares del 2006 y 2016
Authors: Ballestero Andrea
Published: July 2021

En este documento se identifica la proporción de la brecha salarial entre el sector público y el sector privado costarricense que se debe a la diferencia en las características de los trabajadores de cada sector institucional y la proporción que se atribuye a la diferencia en las estructuras de pago de cada sector, con base en las encuestas de hogares de 2006 y 2016. Los resultados muestran que la brecha salarial entre el sector público y el sector privado en Costa Rica se ha ensanchado entre el 2006 y el 2016 (59 % a 64% en el caso de los hombres, y de 59% a 66% para el caso de las mujeres, aproximadamente) y que la porción atribuible a la diferencia en la estructura de pagos de cada sector se ha mantenido muy similar para los trabajadores masculinos (28% a 25%), mientras que ha aumentado para las trabajadoras femeninas (16 % a 35%).
Criteria to evaluate the quality of alginate wound dressings
Authors: Garcia Taysa de Fátima , Silva Paula Gracielle Alves , Barcelos Bárbara Jacome , Miranda Maria das Graças Rodrigues de , Alonso Claudiomiro da Silva , Abreu Mery Natali Silva , Borges Eline Lima
Published: July 2021

ABSTRACT Objectives: to validate an instrument with criteria to evaluate the quality of calcium alginate wound dressings to treat skin injuries. Methods: methodological study, developed in two stages: the elaboration of criteria to evaluate the quality of the alginate wound dressing based on literature; validation of these criteria by a group of evaluators in two moments. Data was analyzed using descriptive statistics, central tendency measures and the Content Validity Index. Results: seven articles were selected, leading to the elaboration of 7 criteria and 11 expected results. The Content Validity Index was 0.98 in stage 1 and 0.93 in stage 2. After adjustments, 8 criteria were validated, and 13 results were expected. Final Considerations: the study allowed the validation of criteria to evaluate the quality of calcium alginate wound dressings, helping the nurses to choose with more autonomy and assertiveness.
Stress level experienced by participants in realistic simulation: a systematic review
Authors: Brasil Guilherme da Costa , Lima Lucas Tomaz Benigno , Cunha Elaine Carvalho , Cruz Flávia Oliveira de Almeida Marques da , Ribeiro Laiane Medeiros
Published: July 2021

ABSTRACT Objectives: to identify the available evidence regarding stress levels experienced by participants in education based on a realistic simulation. Methods: systematic review that included randomized clinic trials on electronic databases: Cumulative Index to Nursing and Allied Health Literature, Cochrane Library, Latin-American and Caribbean Literature in Health Sciences, LIVIVO, PubMed, Scopus, and Web of Science. The additional search was performed on Google Scholar and OpenGrey. All searches occurred on September 24, 2020. The methodologic quality of the results was evaluated by the Cochrane Collaboration Risk of Bias Tool. Results: eighteen studies were included, which evaluated the participants’ stress using physiologic, self-reported measures, or the combination of both. Stress as experienced in a high level in simulated scenarios. Conclusions: evidence of the study included in this systematic review suggest that stress is experienced in a high level in simulated scenarios.
Self-reported violence by nursing students in the context of undergraduate studies
Authors: Maffissoni André Lucas , Sanes Marina da Silva , Bresolin Paula , Martini Jussara Gue , Schneider Dulcinéia Ghizoni , Lino Monica Motta
Published: July 2021

ABSTRACT Objectives: to identify the characteristics of violence in the context of the teaching and learning of the undergraduate Nursing course, from the perspective of students. Methods: quantitative, cross-sectional study, developed with 208 undergraduate students in Nursing. The data was obtained through the application of a survey questionnaire and processed by descriptive and bivariate statistics. Results: of the participants, 69.2% (n = 144) have experienced some kind of violence. Violent acts of a psychological nature were the most frequent, but there were also reports of physical, sexual violence and deprivation or abandonment. Violence was practiced in a theoretical and practical learning environment. Teachers and classmates were the most frequent perpetrators. Most students had no reaction, told friends, family, and colleagues, or pretended that nothing happened in the face of the violent acts. Conclusions: violence is present at various moments in the undergraduate Nursing course and can negatively impact the quality of training in the area.
Participatory survey of citrus in the “Recôncavo Baiano region” with emphasis on the threat of huanglongbing
Authors: Oliveira Gabriela Souza de , Fancelli Marilene , Silva Suely Xavier de Brito , Carvalho Sérgio Roberto Lemos de
Published: July 2021

Abstract Huanglongbing (HLB) is one of the most devastating diseases for citrus sector. In Brazil, the state of Bahia is free of the disease, however it is on constant alert to prevent its introduction. One of the main areas of citrus exploitation in the state is located in the Recôncavo Baiano’s identity territory and is characterized by family-based production. This study aimed to perform a participative phytosanitary diagnosis with citrus growers from the “Recôncavo Baiano” region, recording their perception regarding the HLB and its vector, Diaphorina citri. The diagnosis, which featured 109 interviews, was carried out in five prominent cities in citrus production (Cruz das Almas, Governador Mangabeira, Muritiba, Santo Antônio de Jesus and São Felipe). The results showed that 70% of citrus growers never heard of the disease. It also indicated that only 6% of farmers have technical assistance. Even with the tradition of citrus farmers, the use of technologies is still limited. The presented results constitute an important tool for phytosanitary defense, as it provides strategic information that enable the planning of indispensable actions for preventing HLB entry in this territory, and also to minimize its negative impacts, contributing with the maintenance of the citrus production chain.
Alternative budburst inducers for kiwifruit vines grown in an organic system
Authors: Marques Léo Omar Duarte , Mello-Farias Paulo , Santos Rodrigo Fernandes dos , Martins Carlos Roberto , Konzen Luis Henrique , Malgarim Marcelo Barbosa
Published: July 2021

Abstract Lack of budburst inducers is a major problem in organic production of temperate fruits. This study aimed at evaluating the effect of alternative budburst inducers on kiwifruit vines of cultivar Bruno grown in an orchard in Pelotas, Rio Grande do Sul (RS), Brazil. Inducers efficiency was investigated in both 2016-2017 and 2017-2018 seasons. The first season comprised of ten treatments, which used garlic extract at different concentrations, both, associated with and without mineral oil; Welsh onion extract at different concentrations, both associated with and without mineral oil; just mineral oil; and control (no application). In the second season, evaluation was carried out ith treatments that performed well in the first season, garlic extract atdifferent concentrations associated with mineral oil, just mineral oil and control. The followingvariables were evaluated: budburst percentage, phenology (budburst and flowering), fruit set, number of fruit/plant, fruit mass/ plant, estimate production, mean mass, fruit length and diameter. Results showed that 10% garlic extract + 2% mineral oil induced the highest budburst percentages in both seasons; the position of buds on branches influences budburst; apical buds exhibit the highest budburst percentage; 15% garlic extract causes phytotoxicity to buds; and Welsh onion extract is inefficient to induce budburst.
AVALIAÇÃO DE ATIVIDADES PRÁTICAS DE ALUNOS DE MEDICINA. MÉTODO REPETITIVO-COMPARATIVO
Authors: Alencar Rubens de
Published: July 2021

Resumo: O autor procurou verificar a validade de um novo método de avaliação de atividades práticas para estudantes de medicina, sistema que poderíamos chamar de repetitivo-comparativo. Ficou demonstrado que: Os alunos discordaram de si mesmos, quanto a um mesmo ponto, com apenas uma semana de diferença de tempo, entre um e outro laudo; Aparentemente, ao analisarem um mesmo material, sem aviso, pela 2.a vez, melhoram de rendimento; O Professor, de forma indireta, também é automaticamente avaliado.
ENSINO PROFISSIONALIZANTE, AGENDA 2030 E DESENVOLVIMENTO REGIONAL: UMA ANÁLISE DO MUNICÍPIO DE CANOINHAS-SC
Authors: Blaka Rosimari de Fátima Cubas , Vargas Letícia Paludo , Marchesan Jairo
Published: July 2021

Este artigo tem o objetivo analisar os dados relacionados ao acesso à Educação Profissional e Tecnológica (EPT) nos municípios da Associação dos Municípios do Planalto Norte Catarinense (Amplanorte) e, mais especificamente, no município de Canoinhas-SC, vinculando-os com os Objetivos do Desenvolvimento Sustentável (ODS) propostos pela Organização das Nações Unidas (ONU). Metodologicamente, ampara-se na literatura, dados obtidos em fontes oficiais, tais como, Instituto Brasileiro de Geografia e Estatística (IBGE), Instituto Nacional de Estudos e Pesquisas Educacionais Anísio Teixeira (INEP), Secretaria Estadual de Educação de Santa Catarina (SED) e Secretaria Municipal de Educação de Canoinhas-SC (SME). A pesquisa mostra avanços do Ensino Profissional e Tecnológico no referido município, mas, também, aponta para a necessidade de investimentos e a melhoria na atuação por parte dos agentes públicos ou privados. Por fim, aponta a importância da qualificação profissional para os jovens e adultos como uma das possibilidades de a inserção social por meio de novos postos de trabalho, obtenção de renda e, consequentemente, contribuição ao desenvolvimento regional.
Multi-Document Summarization with Determinantal Point Process Attention
Authors: Perez-Beltrachini Laura , Lapata Mirella
Published: July 2021

The ability to convey relevant and diverse information is critical in multi-document summarization and yet remains elusive for neural seq-to-seq models whose outputs are often redundant and fail to correctly cover important details. In this work, we propose an attention mechanism which encourages greater focus on relevance and diversity. Attention weights are computed based on (proportional) probabilities given by Determinantal Point Processes (DPPs) defined on the set of content units to be summarized. DPPs have been successfully used in extractive summarisation, here we use them to select relevant and diverse content for neural abstractive summarisation. We integrate DPP-based attention with various seq-to-seq architectures ranging from CNNs to LSTMs, and Transformers. Experimental evaluation shows that our attention mechanism consistently improves summarization and delivers performance comparable with the state-of-the-art on the MultiNews dataset
Laterally-loaded pile-MSE wall system performance under different design configurations
Authors: Mohammed W. , Han J.
Published: July 2021

The need for constructing a shallow or deep foundation (e.g. piles) in a mechanically stabilized earth (MSE) wall for superstructure support has increased. However, the performance of laterally loaded piles within the MSE wall and their interaction with soil and reinforcement are not fully understood. Limited full-scale tests and numerical studies have been conducted to evaluate the behavior of laterally-loaded piles within MSE walls. In this study, thirteen reduced-scale model tests were performed to investigate the effects of changing the wall configuration (wall height, and reinforcement spacing and length) and the pile location on the performance of the pile-MSE wall system under static lateral loads. This experimental study found that the piles in high walls could develop larger maximum compressive and tensile strains. Low walls resulted in larger wall facing deflections and maximum tensile strains in the geogrid reinforcement. Small reinforcement spacing and long reinforcement length resulted in higher pile lateral load capacities, smaller wall facing deflections, and smaller reinforcement tensile strains. The pile offset from the back of the wall facing is a critical factor that affected the pile capacity, the wall facing deflection, the reinforcement tensile strain, and the lateral earth pressure distribution behind the wall facing.
Influence of geological reservoir heterogeneity on exploitation conditions of Garadagh field / underground gas storage (Azerbaijan)
Authors: Feyzullayev A. A. , Gojayev A. G.
Published: July 2021

Underground oil and gas reservoirs (formations) are characterized by spatial variability of their structure, material composition and petrophysical properties of its constituent rocks: particle size distribution, porosity, permeability, structure and texture of the pore space, carbonate content, electrical resistivity, oil and water saturation and other properties. When assessing development and exploitation conditions for underground gas storages, created in depleted underground oil and gas reservoirs, the inherited nature of the reservoir development should be taken into account. Therefore, identifying the features of variations in well productivity is a crucial task, solution of which can contribute to the creation of more efficient system for underground gas storage exploitation. The paper presents the ﬁndings of comparative analysis of spatial variations in well productivity during the exploitation of the Garadagh underground gas storage (Azerbaijan), created in the depleted gas condensate reservoir. An uneven nature of the variations in well productivity was established, which was connected with the reservoir heterogeneity (variations in the reservoir lithological composition and poroperm properties). The research was based on the analysis of spatial variations of a number of reservoir parameters: the reservoir net thickness, lithological composition and poroperm properties. The analysis of variations in the net thickness and poroperm properties of the VII horizon of the Garadagh gas condensate ﬁeld was carried out based on the data of geophysical logging of about 40 wells and studying more than 90 core samples. The data on of more than 90 wells formed the basis for the spacial productivity variation analysis. The analysis of productivity variation in the space of well technological characteristics (based on data from 18 wells) in the Garadagh underground gas storage (UGS) was carried out through the example of the volume of cyclic gas injection and withdrawal in 2020–2021 season. The studies allowed revealing non-uniform spacial variations in the volumes of injected and withdrawn gas at the Garadagh UGS, created in the corresponding depleted gas condensate reservoir. The features of the UGS exploitation conditions are in good agreement with the features of the reservoir development conditions (variations in the well productivity). The inherited nature of the reservoir development and the underground gas storage exploitation is substantiated by the reservoir heterogeneity caused by the spatial variability of the reservoir lithological composition and poroperm properties. Assessing and taking into account the reservoir heterogeneity when designing underground gas storage exploitation conditions should be an important prerequisite for increasing UGS exploitation efficiency.
Research, assessment and proposals on resolving power quality problem for the power supply system of Lam Dong alumina refinery, Vietnam
Authors: Do Thanh Lich
Published: July 2021

Alumina production is rather complex technological process of processing mineral raw materials that requires development of effective technological solutions, including in terms of efficiency of using electric energy. The paper is devoted to studying the power supply system of an alumina refinery inLam Dong Province,Vietnam. The tasks that need to be solved for improving the power quality in the power supply system were analyzed. It was shown that non-linear loads significantly degrade the power quality that in turn leads to equipment damage, malfunction and decreasing the refinery productivity. Models of the refinery power supply system were developed and, using which, the quality of power was assessed at the 6 kV voltage utility bus of the power supply system, as well as at the 6 kV and 0.4 kV buses of distribution substations of individual refinery’s subdivisions. Analysis of the simulation findings showed that the nonlinear loads lead to significant distortions of sinusoidal forms of voltages and currents, and decreasing the power factor. Based on the simulation results, it was concluded that voltage harmonics and current harmonics at nonlinear load at the low voltage buses of 0.4 kV and at the buses of 6 kV exceed the permissible limits of the harmonics in accordance with IEEEST519-1992 international standard. Proposals were developed for improving the power quality in the refinery power supply system. For suppressing higher harmonics of current and voltage, it was recommended to use special power quality regulators in the alumina refinery power supply system. It was proposed to use active harmonic filters as the power quality regulators. The proposed solutions allowed obtaining practically sinusoidal forms of voltages and currents in the alumina refinery power supply system.
Substantiation of performance indicators of mine monorail locomotives
Authors: Ryabko K. A. , Gutarevich V. O.
Published: July 2021

Mine transport is an integral part of mining process. The performed analysis of modern monorail autonomous locomotives indicates that this type of underground auxiliary transport is the most promising today due to a number of advantages that were identified in this study. To assess performance indicators of mine monorail locomotives, a number of characteristics are currently used, for instance, the dependences between several parameters of propulsion system operation. The type of characteristic is determined by an independent variable to be selected from the list of the operational or design parameters. To substantiate performance indicators of autonomous mine suspended monorail locomotives, the authors proposed the relationship between the characteristics of the traction energy chain equipment and the diesel locomotive propulsion system efficiency factor. To assess the efficiency of mine suspended monorail locomotive operation, a composite indicator for assessing efficiency of various types of traction was proposed: the operational efficiency factor. This indicator takes into account varying the efficiency factor of the energy chain units depending on their operating modes. When determining the functional dependencies of varying the efficiency factor of power and auxiliary units of monorail locomotives, a grouping of the main parameters according to the features depending on the economic characteristics of the propulsion system and its operating modes was proposed. The operational efficiency factor of the locomotive as a whole is determined both by the economic characteristics of all units of its energy chain and by the modes of their operation.
Traumatic ulcerative granuloma with stromal eosinophilia, an unusual clinical manifestation in the oral mucosa. Case report
Authors:   Facultad de Odontología, Universidad de Concepción, Concepción, Chile., Muñoz-Grez Camila , Ulloa-Bequer Constanza ,   Departamento de Patología y Diagnóstico. Facultad de Odontología,Universidad de Concepción, Concepción. Chile.
Published: July 2021

Introduction: Traumatic ulcerative granuloma with stromal eosinophilia is an uncommon condition of the oral mucosa with a chronic course, usually affecting the tongue. Case Report: Clinically it presents as a chronic ulcer, with raised and indurated borders, rarely presented as a tumor. Histologically it shows a diffuse mixed inflammatory infiltrate, rich in eosinophils. The etiology of this lesion is still unclear; however, chronic irritation from traumatic agents is considered a major initiating factor. In some cases, the presence of CD30+ mononuclear cells within the lesions suggest the possibility of a CD30+ lymphoproliferative disorder. This article presents a case of a traumatic ulcerative granuloma with stromal eosinophilia manifested in a 56-year-old female with a solitary ulcerated tumor inside the right cheek. Conclusion: It was diagnosed based on clinical data and histopathological features. In a brief literature review, the entity has been characterized, analyzing its etiology and nature.
Student perception of early simulation in dentistry
Authors:   Programa de Odontología, Facultad de Ciencias de la Salud, Universidad Peruana de Ciencias Aplicadas (UPC)., Diaz-Vilela Alexandra , Salazar-Reyna Claudia ,   Programa de Odontología, Facultad de Ciencias de la Salud, Universidad Peruana de Ciencias Aplicadas (UPC)., Kinoshita-Rivas Haru ,   Programa de Odontología, Facultad de Ciencias de la Salud, Universidad Peruana de Ciencias Aplicadas (UPC)., Caballero-García Stefany ,   Coordinación de Innovación y Evaluación, Facultad de Ciencias de la Salud, Universidad Peruana de Ciencias Aplicadas (UPC)
Published: July 2021

Objective: To evaluate student perception of early simulation in dentistry. Material and Methods: The design of the study was quantitative, observational and cross-sectional. A total of 121 students, from third year to senior year were evaluated. The perception and its dimensions: satisfaction, self-confidence and good educational practices were evaluated by a survey with a high level of reliability (0.89), modified and adapted for the present investigation, checking coefficients for its use: Aiken's V, Cronbach's Alpha, Test-Retest (Spearman), classified in ability, scenario and general simulation practices, based on the Likert scale (from 1 to 5). For the univariate analysis, the descriptive statistics from qualitative and quantitative variables were obtained and for the bivariate analysis, Spearman's rank correlation coefficient and Kruskal Wallis and Mann-Whitney U-tests were employed. Results: The students rated the simulation perception positively with an average of 4.42±0.49, 4.14±0.63 y 4.73±0.66 regarding the ability, scenario and general simulation practices, respectively. No statistically significant differences were found between the perception of early preclinical practices with the variables age, gender, year of study and previous experience. Conclusion: The perception of students regarding early preclinical practices got a high score and it is not related with the variables studied, according to the survey modified and adapted.
Nissl Staining and Imaging of Mouse Brain Tissue for Slide-seq Registration v1
Authors: Balderrama Karol
Published: July 2021

This is a protocol that describes the steps used for staining adjacent tissue sections when using Slide-seq on mouse brain samples. The adjacent tissue sections are typically 10 microns before and after the tissue slice use for the slide-seq array. Standard imaging settings on most acquisition devices can be used for capturing these images.
Relacionados. El teatro como herramienta educativa
Authors: Pareja Olcina María
Published: July 2021

En esta era tecnológica supone un reto involucrar a los jóvenes en un hábito lector. En este sentido, el teatro es una herramienta fundamental para actuar en el aula con adolescentes y ensayar destrezas lingüísticas como la entonación, la expresión, la escucha atenta y activa o el razonamiento verbal... En este proyecto se ha creado una obra de teatro juvenil (Relacionados) acorde con los intereses de los estudiantes, capaz de suscitar un debate sobre las relaciones de pareja. Se ha publicado la obra con una editorial juvenil que se comercializa en España y se han diseñado actividades teatrales motivadoras con experiencia práctica en el aula de Lengua Castellana y Literatura, con un total de 94 estudiantes y dos niveles: 2º y 4º de la ESO. El desarrollo del trabajo es exportable a otros centros educativos y, por esta razón, la Diputación de Castellón se ha involucrado.
Analytical Solution of the Equations of Motion of the Sensing Element of Nano-Sensor as a Rectangular Rigidly Fixed Nano-Plate
Authors:   Institute of Precision Mechanics and Control of the Russian Academy of Sciences (IPTMU RAS), Saratov, 410028, Russian Federation, Barulina M.A. , Kondratov D.V. ,   Institute of Precision Mechanics and Control of the Russian Academy of Sciences (IPTMU RAS), Saratov, 410028, Russian Federation, Galkina S.A. ,   Institute of Precision Mechanics and Control of the Russian Academy of Sciences (IPTMU RAS), Saratov, 410028, Russian Federation
Published: July 2021

In this paper, an analytical solution of the equation of motion in the displacements of the sensing element of a nanoelectromechanical sensor is obtained. The equations of motion were obtained using the dynamic principle of virtual dis­placements, the third-order plate bending theory, and a new modified couple stress theory. The components of the displacement vector and the linear dimensions of the plate normalized by the value of the plate's height. The sensitive element of the nanosensor was considered as a size-dependent orthotropic plate, simply supported at the edges and under the distributed load. The deflection of the plate is represented as a double trigonometric series. The obtained results were compared with the results of numerical modeling of microplates, carried out in one of the well-known finite element modeling software. Also in work, the influence of size-dependent parameters on the deformation of the nanoplate was analyzed.
Formation of Efficient Microfilm Converters with Reproducible Parameters
Authors:   North Caucasian Institute of Mining and Metallurgy (State Technological University), Vladikavkaz, Russian Federation, Mustafaeva D.G.
Published: July 2021

The use of microfilm converters provides information in the field of processing, storage, transmission and presentation of information, especially in the process of control and measurement of physical quantities, as well as in the technology of manufacturing high technology products. Microfilm transducers form an equivalent output signal, which is a function of the measured quantity; their design and manufacturing technology are interrelated and highly correlated. Microfilm transducers are manufactured using microelectronic technology, in which group methods are used in the formation of a structure, which increases the reproducibility of parameters, are characterized by high sensitivity, low inertia, low power consumption, high reliability, and are combined with measuring signal processing devices. When creating microfilm converters, a structure is determined that most closely meets the requirements, design parameters, modes of manufacturing operations, the effect of operating conditions on characteristics, and optimal modes of operation. Structurally, a microfilm transducer consists of a base, an insulated structure, heat-generating and temperature-sensitive elements that provide the transmission of electrical signals, film conductors and contact pads, which provide a specified function of converting the measured value into an output signal. In microfilm converters, film thermocouples are used as thermosensitive elements, and adhesive sublayers are used in their manufacturing technology. The use of technological methods of microelectronics when creating microfilm converters can significantly improve their operational parameters.
Algorithms for Factorization of Polynomials of Low Degree
Authors:   Lavrentyev Institute of Hudrodynamics of Siberian Branch of Russian Academy of Sciences, Novosibirsk, 630090, Russian Federation, Astapov N. S. ,   Novosibirsk State University, Novosibirsk-90, 630090, Russian Federation
Published: July 2021

For polynomials of the third degree of a special type, expansions into linear factors are found. Various methods of factorization of fourth-degree polynomials of general and particular types are proposed. For polynomials of the sixth degree of a special kind, representations are given in the form of a product of polynomials of lower degrees. Special attention is paid to representations through square trinomials. The decomposition of the generalized reciprocal polynomial of the sixth degree into square trinomials is given.
DIAGNOSTICS AND TREATMENT OF ANEMIC SYNDROME IN PATIENTS WITH BREAST CANCER ON THE BACKGROUND OF NEOADJUVANT CHEMOTHERAPY
Authors: Blindar V. N. , Khagazheeva M. N. , Davydova T. V. , Snegovoy A. V. , Dobrovolskaya M. M. , Lyubimova N. V. , Kushlinsky N. E. , Kononenko I. B. , Toasheva Z. Z. , Kelemetov A. M. , Ryabchikov D. A.
Published: July 2021

Introduction. In recent years, a separate publications have appeared indicating that interleukin 6 (IL-6) and the protein hepcidin 25 (GP25) play a significant role for the development of functional iron deficiency (FID) in oncological patients with a widespread tumor process. It is important to differentiate between FID and iron deficiency anemia (IDA), since they have the same morphological characteristics, but their treatment is fundamentally different.The aim of this study was to study the main metabolites of ferrokinetics, IL-6 and C-reactive protein (CRP) expression parameters in patients with breast cancer on the background of neoadjuvant chemotherapy to develop individual approaches to the diagnosis and treatment of anemic syndrome (AS), prediction, early detection of anemia and its adequate correction.Materials and methods. The study was conducted in 31 breast cancer patients, during of 6 cycles of chemotherapy. The main metabolites of ferrokinetics were studied: GP25, ferritin, soluble transferrin receptors, transferrin, iron, erythropoietin, IL-6 and CRP indices. The control group consisted of 29 apparently healthy women.Results. AS was detected in 14 (45.1 %) of breast cancer patients. IDA prevailed with microcytic, hypochromic characteristics of erythrocytes, a low concentration of ferritin, iron, GP25, IL-6, CRP, and a high level of transferrin and soluble transferrin receptors. A some patients were diagnosed with FID, mainly with the III and IV stages of the disease. Unlike IDA, they had a high concentration of ferritin, CRP and significant production of GP25, IL-6. Erythropoietin level was not optimal for the majority of patients with AS. A few patients on the background of treatment with recombinant erythropoietins revealed a deficiency of vitamins B12 (cyanocobalamin) and folic acid.Conclusion. Early diagnosis, a personalized approach to the prescription of iron preparations, recombinant erythropoietins, vitamins B12 and folic acid in patients with AS allowed for 6 cycles neoadjuvant chemotherapy without a significant decrease in erythrocytes, hemoglobin and hematocrit in most of them. The data obtained on IL-6, GP25, and CRP indicate relationship between them in the development of FID in breast cancer patients with a widespread tumor process and require further study.
EVALUATION OF IMMUNOGENICITY OF SYNTHETIC NEOANTIGEN PEPTIDES FOR THE MELANOMA VACCINE MODEL
Authors: Rudakova A. A. , Baryshnikova M. A. , Sokolova Z. A. , Burova O. S. , Kosobokova E. N. , Kosorukov V. S.
Published: July 2021

Introduction. Immunotherapy based on the usage of mutant tumor neoantigens to activate the antitumor immune response is one of the most promising approaches to cancer treatment.Purpose. Evaluation of individual immunogenicity of synthetic neoantigen peptides for the B16-F10 melanoma vaccine model.Materials and methods. We studied 32 synthetic neoantigen peptides with a length of 25–27 amino acids, which were previously selected as potentially immunogenic by bioinformatic analysis of B16-F10 melanoma sequencing data and healthy tissues of C57Bl/6J mice. Groups of C57Bl/6J mice were immunized four times at weekly intervals with each individual peptide in combination with the adjuvant Poly(I:C), one of the groups was immunized only with Poly(I:C), and the control group was not immunized with anything. The immunogenicity of peptides was assessed by the production of interferon γ in splenocytes using the ELISpot method and by the level of serum cytokines Th1/Th2 using the ELISA method in immunized mice and in animals in the control group.Results. Of the 32 peptides studied, 25 caused an increase in the number of interferon-γ-producing spleen cells in previously immunized mice, but 8 of these peptides caused a non-specific increase in the production of interferon γ by splenocytes in non-immunized animals. It was found that out of 32 peptides, only 11 caused an increase in the level of serum cytokines interferon γ and interleukin 4, which are responsible for the development of the immune response along the Th1 and Th2 pathways. But only 7 peptides affected an increase in the number of interferon-γ-producing splenocytes and an enhance of cytokines interferon γ and interleukin 4 levels.Conclusion. Thus, the immunogenicity of 32 synthetic neoantigen peptides was evaluated, and 7 peptides were shown to activate the cellular immune response.