bluuebunny/crossref_metadata_2025 huggingface dataset:
Pensamento Crítico e Criativo em Matemática: uma Abordagem a partir de Problemas Fechados e Problemas Abertos
Authors: Fonseca Mateus Gianni , Gontijo Cleyton Hércules
Published: April 2021

O desenvolvimento do pensamento crítico e criativo é, cada vez mais, enfatizado no cenário internacional como algo necessário para o século XXI, o que tem induzido a inserção dos termos criatividade, pensamento criativo e pensamento crítico, entre outras variações, em diversos documentos educacionais. A Base Nacional Comum Curricular é um exemplo de documento que apresenta esses termos entre as competências gerais que os estudantes devem desenvolver ao longo da educação básica. Todavia, faz-se necessária a consolidação de um arcabouço teórico e metodológico que possa dar suporte para propostas pedagógicas que viabilizem o desenvolvimento desse tipo de pensamento nas mais variadas áreas do conhecimento e, em particular, no campo da matemática. Nesse sentido, o objetivo deste artigo é apresentar um referencial teórico-prático relacionado ao pensamento crítico e criativo em matemática, com vistas a subsidiar o trabalho dos professores em sala de aula.
Lesson Study e Engenharia Didática na Formação e Desenvolvimento Profissional de (futuros) Professores de Matemática
Authors: Dias Ramos de Macedo Aluska , Bellemain Paula Moreira Baltar
Published: April 2021

Este artigo aborda um recorte de uma pesquisa de doutorado tendo como objetivo analisar contribuições da Lesson Study e da Engenharia Didática para a formação e o desenvolvimento profissional dos estagiários pertencentes ao Estágio Curricular Supervisionado. A estrutura do processo valorizou as limitações e as proximidades de cada metodologia para conduzir a construção de conhecimentos sobre o ensino e a aprendizagem de duas grandezas geométricas Comprimento e Área. Houve a participação do formador do Estágio, supervisor – professor que recebe os futuros professores na escola, quatro estagiários e uma turma de 7º ano com 30 alunos. Com a interação, discussão, estudo, planejamento de aulas e reflexão destas, pode-se perceber contribuições do processo envolvendo LS e ED para a profissionalização dos estagiários.
Aprendizagens de Futuros Professores de Matemática em um Estágio Curricular Supervisionado em Processo de Lesson Study
Authors: Neves Regina da Silva Pina , Fiorentini Dario
Published: April 2021

Este artigo tem por objetivo compreender as aprendizagens e os aprendizados de futuros professores ao participarem de um Estágio Curricular Supervisionado em Matemática, nos Anos Finais do Ensino Fundamental, por meio de um processo de Lesson Study (LS). Para tanto, foi desenvolvida uma investigação qualitativa sob a perspectiva da Teoria Social de Aprendizagem situada em Comunidades de Prática, entendendo a negociação de significados como mecanismo de aprendizagem e a participação como forma de aprendizagem de estagiários que atuam em escola pública. Foi tomado como material de análise as ações colaborativas de estudo, planejamento, docência e reflexão sobre a docência, bem como a análise e a escrita de diários e de narrativas reflexivas dos estagiários e da orientadora sobre essas ações. Os resultados indicam a coconstrução de aprendizagens discursivas, interativas e experienciais dos estagiários e evidenciam o potencial formativo do LS como processo de problematização e aprendizagem profissional do futuro professor que ensina matemática.
Dialogic Learning as an Alternative Approach for Mathematics Classrooms
Authors: Dörr Raquel Carneiro
Published: April 2021

This article characterizes the Dialogic Learning (DL) approach, presenting its constitutive elements using the literature related to the studies that have dealt with this theme in the specific context of practices and learning in math classes. In this way, the conception of dialogue that is practiced lies in the interaction between educator and learner through written language. The text also reports and shows two illustrative records that are used to establish a discussion about the importance of the activity and to emphasize how significant would be to disseminate the methodology amid math teachers at all educational levels. The DL approach aggregates important dimensions of communication and interaction between participants that are necessary to construct a differentiated idea about making mathematics, replacing the restrictive image disseminated over time by the classic lecture classes.
Comparative study of the power output of a mobile PV panel and a fixed PV panel
Authors:   École Supérieur Polytechnique, Université Cheikh Anta Diop, BP 5085, Dakar, Sénnégal, Sène Diatta , Sarr Adama , Ndiaye Mouhamadou Falilou
Published: April 2021

Avec le coût élevé de l'électricité, les centrales électriques ne sont plus rentables et les énergies renouvelables deviennent un domaine d'étude privilégié. Cela justifie qu'au Sénégal, on constate de plus en plus la création de centrales photovoltaïques et de petites installations domestiques afin de satisfaire les besoins en électricité. Cependant, nous constatons une limitation des terrains pour répondre à nos besoins pour l'installation de ces centrales solaires PV. La question est de voir avec le peu d'espace dont nous disposons comment optimiser au maximum la quantité d'énergie pour répondre à la demande ? Comme l'inclinaison des panneaux photovoltaïques est souvent fixe et que cela ne donne pas toujours une énergie optimale, nous avons pensé aux suiveurs solaires. L'objectif de ce travail est de comparer la puissance de sortie des deux panneaux PV, avec les mêmes caractéristiques et dans les mêmes conditions environnementales. Pour ce faire, nous procédons en calculant la puissance maximale disponible à la sortie d'un panneau photovoltaïque. Cela consiste à rechercher les modèles mathématiques qui permettent de calculer cette puissance. Pour choisir le modèle le plus proche de la puissance caractéristique donnée par le fabricant du panneau PV dans les conditions de test, nous avons écrit un programme sous l'environnement Matlab, les résultats de ce script distinguent ce modèle. Les caractéristiques du panneau PV choisi sont appliquées dans chaque cas d'installation photovoltaïque. Ces résultats ont montré que la production du panneau PV mobile est plus importante que celle du panneau PV fixe. Nous avons constaté que la puissance électrique du panneau PV mobile produit plus de 10 à 38% supérieure à celle du panneau PV fixe selon le jour du mois considéré.
Energy situation of Senegal: sub-sector of electricity
Authors: BA Amadou
Published: April 2021

Senegal's energy consumption is dominated by oil products and biomass. The electricity sub-sector, which accounts for only 10.4% of total energy consumption, far behind biomass 41.6% and oil products 39.2%, is remains dominated by thermal units. The objective of this study is to do an analysis of the electricity sub-sector. It shows a dependence on imports of oil and gas to meet our demand. Important policies have been developed to think about energy independence by exploiting our renewable energies potential, 5kWh / m² / day for solar, average wind speed estimated at 4m / s for wind. The liberalization of the energy market has allowed public and private investors to invest in this sector. The installed capacity has enabled Senegal to avoid the emission of 156.243 tons of CO2 per year with the six solar photovoltaic plants. Despite immense potential of renewable energies, their rate remain low in the power park and is estimated for (solar photovoltaic, wind and hydraulic) at 28 % in 2020.
Perioperative use of β-blockers in oncological patients
Authors: Sorochan P. P. , Hromakova I. А. , Prokhach N. E. , Роnomarev I. M. , Hromakova I. S.
Published: April 2021

Background. One of the most common responses to surgical stress is the activation of the sympathetic nervous system, leading to a dramatic increase in circulating adrenaline and norepinephrine, which can potentially accelerate the spread of the tumor process in cancer patients. In this regard, it is relevant to review the results of studies devoted to the determination of the antitumor effect of β-blockers and their use in the perioperative treatment of cancer patients.

Purpose – to analyze and summarize data on the oncogenic effects of catecholamines and to highlight the experience of using β-blockers in the perioperative treatment of cancer patients. Materials and methods. We used the electronic resources of Vernadsky National Library of Ukraine, Cochrane library and databases (Pubmed, Scopus). We analysed the results of studies conducted before August 2020.

Results. A summary of the mechanisms by which excessive release of catecholamines may facilitate metastasis is provided. The analysis of clinical trials devoted to the study of the effects of perioperative use of propranolol and its combination with COX-2 inhibitors in cancer patients is conducted.

Conclusions. Short-term perioperative therapy with propranolol and its combination with anti-inflammatory drugs may have antimetastatic effects and neutralize the immunosuppressive effects of surgical stress. Further elucidation of the clinical significance of perioperative propranolol treatment in cancer patients requires a 3–5-year study to assess the long-term relapse-free survival of cancer patients.
The role of computed tomography in optimizing the surgical treatment of ventral hernias
Authors: Parkhomenko K. Yu. , Vovk V. A.
Published: April 2021

In spite of a high informative value, spiral computed tomography is currently an additional optional examination and it is not included in domestic and foreign preoperative examination protocols.

Purpose – assessing the feasibility of spiral computed tomography in the complex of presurgery examination of patients with ventral hernias. Materials and methods. The paper deals with analyzing the diagnostic findings of 35 patients with ventral hernias treated at Surgery Department of Municipal Non-Commercial Enterprise of Kharkiv Regional Council “Regional Clinical Hospital” during 2018–2019 period. All patients were operated on after compulsory and additional examinations according to the existing guidelines. Spiral computed tomography was an additional examination for all patients. The frequency of symptoms detected by means of computed tomography and confirmed during surgery was analyzed.

 Results. Most of the signs revealed during tomography and associated with the combined abdominal pathology, were completely confirmed by laparoscopic exploration of the abdominal cavity and pelvis. Spiral computed tomography was of particular value in patients clinically diagnosed with chronic appendicitis. When assessing the ventral hernia, it was possible not only to clearly determine its content and location towards the abdominal line, but also, before surgery, to calculate the width and length of the hernia gate and the volume of the organs in hernia sac. Unlike ultrasonography, computed tomography makes it possible to thoroughly evaluate the dimensions of the hernia gate and the state of the muscular aponeurotic layer of the anterior abdominal wall. Not least important is diagnosing the combined abdominal pathology, including the oncological one, which has no clinical manifestations but still has to be exposed to surgery.

Conclusions. In the complex of preoperative examination of patients with ventral hernias, spiral computed tomography provides useful information on the anatomical features of ventral hernia and the combined abdominal pathology that requires surgical intervention. These data aid in planning a favorable type of hernioplasty of ventral hernia and simultaneous surgery. Spiral computed tomography is recommended to be added to the standard protocol of presurgery examination of patients with ventral hernias.
Radar Cross Section Reduction and Shape Optimization using Adjoint Method and Automatic Differentiation
Authors: Li Ming , Bai Junqiang , Qu Feng
Published: April 2021

An efficient Radar Cross Section (RCS) gradient evaluation method based on the adjoint method is presented. The Method of Moments is employed to solve the Combined Field Integral Equation (CFIE) and the corresponding derivatives computing routines are
generated by the program transformation Automatic Differentiation (AD) technique. The differential code is developed using three kinds of AD mode: tangent mode, multidirectional tangent mode, and adjoint mode. The differential code in adjoint mode is modified and optimized by changing the “two-sweeps” architecture into the “inner-loop two-sweeps” architecture. Their efficiency and memory consumption are tested and the differential code using modified adjoint mode demonstrates the great advantages in both efficiency and memory consumption. A gradient-based shape optimization design method is established using the adjoint method and the mechanism of RCS reduction is studied. The results show that the sharp leading can avoid the specular back-scattering and the undulations of the surface could change the phases which result in a further RCS reduction.
Compact Tri-Band Microstrip Patch Antenna Using Complementary Split Ring Resonator Structure
Authors: Rajesh Kumar Narayanasamy , Sathya Palan , Rahim Sharul , Nor Muhammed , Alomainy Akram , Eteng Akaa
Published: April 2021

In this letter, a compact complementary split ring based tri-band antenna is proposed. The proposed antenna resonates at 1.9 GHz (1.70-1.91 GHz), 2.45 GHz (2.23-2.52 GHz) and 3.2 GHz (2.9-3.25 GHz); the input match values are 24.56 dB, 27.21 dB and 22.46 dB, respectively. The antenna’s realised peak gain is 4.15 dBm at 1.9 GHz, 4.25 dBm at 2.4 GHz and 4.74 dBm at 3.2 GHz, with approximately 42% of reduction in antenna size. The results demonstrate that the proposed metamaterial antenna is tunable, electrically small and
highly efficient, which makes it a suitable candidate for RF energy harvesting. The antenna is numerically and experimentally analysed and validated with very good comparison between the simulated and measured results.
The Provision of Tourists’ Rights in Uzbekistan: International and National Standards
Authors:   Ph.D. in law, Associate Professor, University of World Economy and Diplomacy,, Usmanova Surayyo Bultakovna
Published: April 2021

This article examines the issues of legal regulation, which are the basis of all areas and directions of tourism. In particular, the analysis of the importance of international legal norms in ensuring the rights, freedoms and safety of tourists in Uzbekistan, the need for their implementation in national legislation. The author has also developed suggestions and recommendations for specific issues based on the findings of this study.
Transfer Teknologi Pembuatan Curriculum Vitae Dan Poster Untuk Siswa Pondok Pesantren Al-Munawwaroh
Authors: Wibawa Aji Prasetya , Ashar Muhammad , Patmanthara Syaad
Published: April 2021

Pengunaan teknologi dalam dunia digital yang sudah semakin canggih, mengakibatkan banyaknya software yang semakin mempermudah masyarakat untuk mengembangkan kinerja dan kreativitas. Pada perkembangan era modern ini semakin dibutuhkan keahlian dan keterampilan untuk mengelola suatu software tertentu. Untuk saat ini, profesi desain juga semakin digemari dan dibutuhkan oleh perusahaan. Sehingga memungkinkan untuk kita menguasai suatu software tertentu dalam mendesain. Untuk mengembangkan kinerja dan kreativitas melalui desain dengan memberikan pelatihan desain kreatif menggunakan Figma dan diaplikasikan dengan pembuatan CV atau bentuk lainnya. Figma adalah salah satu penyedia software desain online yang tersedia di jejaring internet sehingga memudahkan seluruh pengguna untuk mengaplikasikan desain tanpa mengunduh software terlebih dahulu. Pemberian pelatihan ini diharapkan membantu siswa untuk mengembangkan kreativitas dan menambah pengetahuan tentang desain melalui figma.
Anterior abdominal wall defects: Demographic and clinical profile and outcome at a tertiary care hospital
Authors: Kumar Parveen , Manchanda Vivek , Sengar Mamta
Published: April 2021

Background: The anterior abdominal defects, especially gastroschisis and omphalocele have high mortality rates in developing countries. Time to intervene has been hypothesized to be associated with morbidity and mortality. The aim was to determine factors affecting mortality in neonates with anterior abdominal wall defects.
Methods: This retrospective descriptive study was done at a tertiary pediatric care center. The medical records of patients with a diagnosis of anterior abdominal defects (omphalocele/gastroschisis/umbilical cord hernia) admitted at our center from Jan 2015 to Dec 2019 were retrieved. The demographic and clinical data were studied including age, sex, religion, gestational age, associated anomalies, electrolytes at admission, septic profile, operative details, length of hospital stay, and mortality. The statistical data was fed on a Microsoft Excel worksheet and analysis was done.
Results: Thirty-nine (39) neonates were included in the study. M:F ratio was 2:1, with 61.5% belonging to the Hindu religion. The majority had term gestation (87.2%). Birth weight ranged from 1.5 to 4 kg (mean 2.47 + 0.5 kg). Eighteen (18) neonates had gastroschisis, 15 omphalocele major and 6 omphalocele minor, with a median age of presentation at 1 day of life. Time to intervention ranged from 0 to 5 days (interquartile range 1-1.25 days) after admission. Primary closure could be achieved in the majority (66.7%), while ventral hernia was created in 17.9% and the silo was needed in the rest. The mean postoperative length of stay was 9.31 days (+ 9.85 days) with a survival rate of 51.3%. The mortality rate in gastroschisis and omphaloceles were 61.1% and 38.1% respectively. The significant factors for survival were time to intervene, birth weight, and primary abdominal wall closure.
Conclusions: The present study brings out a different clinical profile of anterior abdominal wall defect patients. We recommend early surgery soon after stabilization and primary abdominal wall repair whenever abdominal pressures permit.
DESIGN IMPROVEMENT OF A GAS-FIRED PYROLYSIS REACTOR
Authors: Akinbomi J.G. , Oyedeko K.F.K , Salami L , Aminu K.A. , Anozie A,N, , Sonibare J.A.
Published: April 2021

Design defects in a reactor often results in poor reactor performance. This study examined the effects of variations in burner holes and air to fuel ratio on thermal efficiency and emission characteristics of three locally fabricated gas cooking stoves with 48, 96 and 144 burner holes. The purpose of the study was to use the stove design with optimal efficiency and lowest emissions, as a model for improving the design of a gas-fired pyrolysis reactor that had air-fuel intake port defect with consequent incomplete combustion. The results of the study showed that stove with 96 burner holes produced the lowest emissions of 89.672 mg/m3 while stove with 144 burner holes was found to be the most fuel efficient with efficiency of 69.0. The results imply that a trade-off exists in the design of the burners to achieve either the most environmentally-friendly or most fuel-efficient burner. However, a compromise of the two objectives of maximizing fuel efficiency and minimizing emissions was reached by choosing as a model, the burner having 96 holes with thermal efficiency of 64.3% and emissions of 89.672 mg/m3 over burner having 144 holes with thermal efficiency of 69.0% and emissions of 258.974 mg/m3 . Keywords: Air flow, , Burner Holes, Combustion, Emissions, Improved design, Thermal ef
Determinación del contenido de taninos extraído de la vaina de la tara (Caesalpinia spinosa) proveniente del barrio el portete, cantón Gonzanamá de la provincia de Loja
Authors: Camacho- Gahona Yazmin Isabel , Ordoñez- Gutiérrez Oscar Rodrigo , Chalco- Sandoval Rolando
Published: April 2021

La tara (Caesalpinia spinosa) es una especie forestal originaria de Sudamérica, la cual presenta una gran potencialidad en la industria mundial en el campo de agroexportación y agroindustria, por el uso de sus derivados como taninos, mismo que tiene una demanda insatisfecha en el mercado al ser utilizado en industrias de curtiembre y alimentación; el trabajo de investigación se lo desarrolló en los meses de septiembre del 2019 a marzo del 2020 y tuvo como finalidad determinar la cantidad de taninos presentes en los frutos recolectados en el barrio El Portete, para ello se elaboró extractos acuosos por maceración y calentamiento, a los cuales se realizó los análisis organoléptico (color y olor) y físico – químico (pH y densidad), y, la cuantificación de taninos a cada extracto, considerando dos concentraciones de solución de permanganato de potasio (0,025 y 0,1 N). Los resultados muestran que las características organolépticas y físico – químicas de los extractos obtenidos por calentamiento y maceración no presentaron diferencias significativas entre ellas, excepto el pH que oscila entre moderadamente (3,7) y ligeramente ácido (4,3); en cuanto a la cuantificación de taninos se observa similitud entre los valores obtenidos con los dos métodos de extracción, sin embargo, existió diferencias entre los valores alcanzados con las dos concentraciones de permanganato de potasio, obteniendo los mejores rendimientos (52,5 %) a la concentración de KMnO4 al 0,1 N.
Diversidad anatómica de cinco biotipos de la especie Theobroma cacao (cacao) en la región sur de Ecuador
Authors: Zhiñin-Quezada Hector , Narváez-Manchay Enrique , Merino-Gálvez Bryan , Pucha-Cofrep Darwin
Published: April 2021

La agrobiodiversidad incluye la variabilidad a nivel específico y genético, sus dinámicas y relaciones entre la sociedad las plantas cultivadas y sus parientes silvestres. La especie Theobroma cacao L. tiene un alto valor cultural y económico en Ecuador porque ayuda alrededor de 100 000 familias rurales. No obstante, la estructura de su madera y la variabilidad de las características microscópicas entre sus biotipos es desconocido. Por ello, este estudio busca llenar este vacío con un análisis anatómico de la madera en sus tres planos (transversal, tangencial, y radial) de acuerdo a la normativa IAWA en cinco biotipos de T. cacao (aromático, criollo, forastero, trinitario y CCN51) procedente de los sectores Piuntza y Guayzimi de la provincia de Zamora Chinchipe. Se encontró que todos los biotipos presentaron placas de perforación simples, punteaduras poligonales alternas, parénquima axial difuso, radios multiseriadas y uniseriadas, radios con células procumbentes de 2-4 filas de células verticales y/o cuadradas marginales, no obstante, los cristales prismáticos, drusas, células de envoltura y células radiales perforadas eran variables. A nivel cuantitativo, con mayor altura de radios se presentó principalmente en los biotipos criollo y forastero, mientras que el biotipo CCN51 y trinitario obtuvieron mayores valores en vasos por milímetro cuadrado. Con esto se demostró que todos los individuos analizados, a pesar de ser de una misma especie tuvieron diferencias anatómicas, lo cual demuestra que el estudio microscópico de la madera es una herramienta muy útil para la identificación de biotipos dentro de una especie.
Supportive Care Needs of Patients with Cervical Cancer in the Northeast of Thailand
Authors: UNJAI Supan , SOMJAIVONG Busaba , BOYES Allison
Published: April 2021

In this study, a descriptive design was used to explain the supportive care needs of cervical cancer patients in the Northeast of Thailand. The purposive sample was recruited from inpatient and outpatient departments of a university hospital. A total of 144 patients with cervical cancer in stage I - IV or recurrent stage completed the Thai version of the Supportive Care Needs Survey-Short Form 34 (SCNSF-34 Thai version). Descriptive statistics were used to identify the domains and items of the greatest unmet need. Results showed that standardized five domain scores indicated that participant’s unmet needs were highest in the health system and information domain ( = 2.95, S.D. = 1.15), and lowest in the sexuality domain ( = 1.63, S.D. = 0.94). The five most frequently endorsed items of moderate to high unmet need were all from the health system and information domain as follows: receiving information about things can do to help in recovering from illness (74.3 %), receiving information from documents, charts, or paintings about illness management and side effects that may occur at home (66 %), receiving information about cancer which is under control or in remission (63.2 %), support from at least one health care staff that can discuss illness, treatment, and follow up (63.2 %), receiving written information about the essential aspects of care (59.7 %), and receiving written information about the importance of care (59.7 %). It was clear that a large proportion of cervical cancer patients in Thailand reported unmet supportive care needs. Therefore, nurses should design nursing care services that are consistent with the supportive care needs.
Ethological methods for the selection of young pigs for herd replacement
Authors: Doylidov Viktor
Published: April 2021

Ethologists have identified many aspects of animal behaviour, and their research experience can be used in agricultural production for the selection of animals with necessary behavioural qualities. The purpose of the study was to find labour saving and effective methods for the selection of young pigs for herd replacement, including identification of their behavioural characteristics in the context of industrial pork production. The method for the selection of young animals based on the viability index of newborn piglets was compared with other method, which takes into account the independent attachment of piglets to the front three pairs of sow teats. It was found that the probability of independent attachment of a piglet to anterior teats has a positive and high correlation with its viability index, with a correlation coefficient of 0.95. Piglets that occupied the front three pairs of teats during the suckling period significantly (P≤0.001) exceeded the rest in weight at the 21st and at the 60th days by 22.7% and 5.4%, respectively. When assessing the behavioural reactions of piglets weaned from sows in an artificially created stress conditions, groups of piglets resistant and not resistant to psychological (emotional) stress were selected for subsequent observation. Moreover, it was found that among the sows obtained from stress-resistant piglets, the superiority in fertility during the first insemination and the total proportion of farrowing was 11.1 p.p., in terms of multiple fertility – 2.6 piglets (P≤0.05) or 33.3%, and in terms of the share of those transferred to the main herd – 27.8 p.p. in comparison with the group of unstable ones. Based on the obtained results, the use of an ethological method for selecting piglets for herd replacement was substantiated, taking into account the independent attachment to anterior teats and an express method for selecting piglets based on their resistance to psychological stress
Species composition of harmful entomocomplex in peach orchards of Southern Ukraine
Authors: Yudytska Iryna , Klechkovskyi Yurii
Published: April 2021

Studies of the dynamics of changes in the species composition of pests in fruit orchards in the context of climate change became especially relevant. Monitoring of phytophagous insects in gardens with the isolation of dominant species is a key component for building an effective system of protection of perennial plantings. The study was conducted in 2018-2020 on the basis of the Melitopol Experimental Station of Horticulture named after M.F. Sidorenko IS NAAS. The purpose of the study was to establish the species composition of phytophages and the level of their colonisation of peach orchards to optimise measures to protect this crop from pest damage. Conducting route and detailed surveys in different phases of tree development (swelling of buds, pink bud, flowering, end of flowering, forming, growth and ripening of fruits) showed that the entomocenosis of peach orchards consisted of 15 species of phytophagous insects belonging to 4 orders, 10 families, and 2 species of mites. The species composition and level of pest colonisation of peach orchards changed under the influence of weather conditions and protection measures. Lepidoptera insects were represented by 7 species of pests, among which the main carpophages were Grapholitha molesta Busck., to a lesser extent Anarsia lineatella. The attack density of these pests each year was at a high and medium level, respectively. Throughout all the years of study most harmful of insects from the order Coleoptera was polyphagous Epicometis hirta. The main Homoptera pest in 2018 was Quadraspidiotus perniciosus Comst., while the prevalence of other catfacing insects was weak. During the vegetation periods of 2019-2020 the development of insects such as aphids and increase in the colonisation of leaves by mites, Thrips fuscipennis Haliche and Typhlocyba rosae L. was recorded in peach orchards
Influence of carbonised biomass on soil improvement, increase in yield of agricultural crops and mitigation of climate change implications
Authors: Didkivska Hanna , Masliukova Zosya , Novytska Yevheniia
Published: April 2021

The relevance of the study is conditioned by the need to develop and implement new technological solutions for tillage, which will improve the soil properties. The purpose of this study is to assess the impact of carbonised biomass on the properties and quality of soils, as well as the associated environmental consequences. The tasks addressed by the study were solved with the help of scientific theoretical methods: analysis, systematisation and generalisation of results. The scientific works related to the problem of the influence of carbonised biomass on soil quality were analysed in this paper. An assessment of the effectiveness of its use as an organic ameliorant and its effect on improving the agronomic properties of soils, their fertility, and on the ecological situation has been carried out. It is substantiated that the use of obsolete agricultural technologies during agricultural activities and their violation have a negative impact on soil fertility and increase in greenhouse gases in the atmosphere. It is argued that this could lead to a global food crisis. It has been emphasised that due to the use of biochar as an organic ameliorant the physical and microbiological properties of soils are improved, the availability of nutrients is optimised, and the content of toxic elements is reduced. It is shown that carbonised biomass has a positive effect on yields and also helps to reduce greenhouse gas emissions into the atmosphere. The main current problems that exist in Ukraine regarding the use of soil improvement technology with the help of carbonised biomass are identified. The ways of their solution for the further development of these technologies and their implementation in the agro-industrial sector are proposed. The practical value of the study consists in determining the effectiveness of using carbonised biomass when it is introduced into the soil to improve its quality, increase crop yields, and slow down climate change
ТМД АУМАҒЫНДАҒЫ ҚАЗАҚСТАННЫҢ БІТІМГЕРШІЛІК ОПЕРАЦИЯЛАРЫНА ҚАТЫСУЫ
Authors: Акишев Арман Айтмухаметович , Ичиев Султан Хаджи Мухарбекович
Published: April 2021

Қазіргі заманғы бітімгершілік оның барлық түрлері мен нысандарындағы превентивті дипломатиядан бастап, барлық ілеспе шығындар мен кемшіліктерге қарамастан, күш-қуатты орынды пайдалануға дейін қарулы қақтығыстарды болдырмаудың, бақылаудың және реттеудің тиімді тәсілі болып табылады. Бітімгершілік операцияларында негіз қалаушы халықаралық-құқықтық нормалардың орындалуы және адам құқықтары мен егемен мемлекеттердің оны жүзеге асыру қаншалықты қиын болса да, бұзылмауы маңызды. Бітімгершілік Қазақстанның сыртқы саяси бағытының басты басымдықтарының бірі ретінде қаржылық, технологиялық және инновациялық ресурстарды тарту, қоғамды одан әрі демократияландыру үшін қолайлы ахуал қалыптастыра отырып, өңірде де, республиканың ішкі саясатында да оң өзгерістердің дамуына ықпал етеді.
Assessing The Change In Voltage In Citric Fruit Lemon Due To Ageing
Authors: Puthillath Beena , Venugopal Priya , J Aswini , Menon Ratish , Thomas Francis
Published: April 2021

In this study citric fruit lemon was used for generation of electricity. The lemon fruit can be used as such or in crushed form. In order to achieve higher voltages, we connected more number of fruits in series. For higher magnitude of current we have to connect lemon in parallel and for increased voltage and current we have to connect lemon in series parallel combination. Here we used citrus fruits, wires and electrodes for performing the experiment. The out is connected to LED to check the output. Output voltage is measured in various conditions using Multimeter. The various conditions under study are raw lemon, ripe lemon, aged lemon. The assumption was due to ageing the magnitude of voltage and current decreases. It is found that raw and ripe lemon gives better output voltage compared to aged lemon. More the age of the lemon lesser is the magnitude of voltage. This method can be used not only for power generation using citric fruit lemon but also after power generation it can be used as natural manure. More over this method does not cause any pollution or global warming. As the magnitude of the current and voltage is small the output can be used for working of devices which operates in low voltage and current thereby reducing the usage of pollution causing batteries.
A theoretical journey from social constructivism to digital storytelling
Authors: Abderrahim Lizzie , Gutiérrez-Colón Plana Mar
Published: April 2021

Using the concept of a journey through time, this article examines the theoretical foundation underpinning the use of digital storytelling as a pedagogical tool in the language classroom. It describes the arguments developed by Dewey, Piaget and Vygotsky, which form the basis of social constructivist theory and the work of Kolb from which experiential learning theory was developed. It goes on to describe how these theories are reflected in pedagogical approaches to language learning, from Asher’s total physical response approach, to Blaine Ray’s TPR storytelling and finally to the development of digital storytelling by Lambert and Atchley. Along this journey, the reader is able to pause and consider progressive theories of education and to take account of cognitive development and sociocultural theory. The significance of experience in the learning process and the value of a physical response becomes evident and the benefits of  telling stories, whether these are told in the traditional way or through the use of digital technology is apparent.
Analysis of the integration of ICT in Second Language Learning in Prescholl in Colombia
Authors: Harris Bonet Paola
Published: April 2021

The introduction of Information and Communications Technologies (ICT) in the educational sphere is becoming more and more essential due to its potential as a pedagogical tool. This study aims to evaluate some factors that facilitate and hinder the pedagogical use of ICT in the context of learning English as a second language (L2) at preschool education levels. Through the methodology of Design Thinking, it is possible to structure the characteristics that a playful interface should have in order to support this educational process and, especially, to satisfy the needs of an environment that intends to make the most of the technological resources it has. To this end, this methodology takes into account the experience of direct users (children), indirect users (teachers) and the socio-economic dimension of educational centres, headed by managers. In this sense, two ad hoc questionnaires were completed by the school executives and teachers, respectively, in a specific educational context of Barranquilla, Colombia. The questionnaires were administered to 25 schools. Data analysis showed the importance of ICT in improving the teaching and assessment process. At the same time, it shows the levels of frustration of some teachers who use technologies with low levels of training or with self-generated content that limit the use of ICT in an appropriate way. These results will outline a number of characteristics that should be considered when implementing actions to improve the teaching of English in the classroom using digital tools.
Democracia ambiental y coproducción de recursos cognitivos locales para el manejo de la biodiversidad en reservas de biosfera
Authors: Márquez Rosano Conrado , Legorreta Díaz María del Carmen , Linck Thierry
Published: April 2021

¿Cómo lograr que la biodiversidad un bien común de la humanidad se mantenga como un recurso colectivo propio de las comunidades humanas que dependen directamente de ella para su subsistencia? Este es el tema que aquí se analiza, el cual ha sido institucionalizado por la creación de reservas de biosfera en México y otras partes del mundo. Si bien, la preservación de la biodiversidad es de interés común, la creación de reservas implica para las poblaciones residentes una alteración de las modalidades de apropiación y acceso a recursos vitales para ellas. Este artículo aborda el caso de la Reserva de la Biosfera Montes Azules (REBIMA) y la Reserva de la Biosfera Lacantún (REBILA) en Chiapas. Es un aporte a la discusión por su importancia y un reto a la democracia ambiental, al exponer diversas racionalidades que interactúan en la REBIMA. Asimismo, discute la necesidad de crear consensos entre los actores involucrados que propicien procesos de co-construcción de recursos cognitivos locales para el uso y manejo de la biodiversidad a fin de resolver la pregunta arriba formulada.
El sincretismo como estrategia de pervivencia de las lenguas originarias en México
Authors: Castillejos López Willelmira , Santos Cervantes Cristóbal
Published: April 2021

En este trabajo se identifica el concepto de sincretismo como una denominación alternativa de las estrategias de los pueblos originarios para sostener su identidad lingüística en un contexto marcado por presiones sociales, así como por condiciones internas y externas de los sistemas lingüísticos. Se parte de una consideración axiomática de interacciones orales de hablantes de lenguas originarias y del hecho de que cinco siglos después de la colonización y de políticas de lenguaje desfavorables para las comunidades indígenas, más de la mitad de las lenguas originarias de México, cuenta aún con una vitalidad importante. Se conformó información que justifica la existencia de un sincretismo visible en la morfología léxica y en la alternancia de códigos, los cuales constituyen los medios de la estrategia de reproducción social de carácter simbólico que empodera y equilibra el ecosistema sociolingüístico. Se concluye que, en medio de una situación sociolingüística compleja, las comunidades de habla indígenas aplican una dinámica interna de pervivencia identitaria asumida en las transformaciones de su lengua, al tiempo que enfrentan la dinámica externa de las presiones capitalistas que se van imponiendo gradualmente mediante la lengua mayoritaria.
Manejo local de los suelos cañeros en Tlaquiltenango, Morelos, México.
Authors: Hernández Andrade Eréndira E. , Ortíz Solorio Carlos A. , Gutiérrez Castorena Ma. del Carmen , Gutiérrez Castorena Edgar V. , Sánchez Guzmán Patricio
Published: April 2021

El manejo local de los suelos cañeros en el municipio de Tlaquiltenango, Morelos, se realizó a través de entrevistas a productores, empleando como marco de referencia geográfico a las clases de tierras que son identificadas por los propios usuarios. Los datos de manejo por clase de tierra se compararon con la información de la zafra 2013-2014, proporcionada por el ingenio Emiliano Zapata y con folletos para productores de instituciones gubernamentales. Tres clases de tierras fueron reconocidas y por orden de dominancia son: Barro Negro con Caliche, Barro Negro y, Barro Café. Las tierras tuvieron manejos similares en cuanto al uso de la yunta de bueyes para la siembra y el surcado, manejo del agua, control de plagas y en la utilización de fertilizantes. Sin embargo, para resolver problemas específicos se aplicaron diferentes estrategias, como el uso de “Sacuales” en la conducción del agua; y el abonamiento con estiércol o con algas acumuladas en los canales. Se identificaron cuatro variedades, que se cultivan durante varios ciclos. El estudio permitió comprobar que las clases de tierras se relacionan con el rendimiento de caña. Existen diferencias entre lo que hace el productor y las recomendaciones tecnológicas de instituciones oficiales.
Cytogenetic status of blood lymphocytes in schoolchildren living middle and high latitudes
Authors: Pozharskaya Victoria Victorovna
Published: April 2021

Intensive industrial development of the northern regions of the Russian Federation is primarily associated with the extraction and processing of natural resources, which leads to environmental pollution and makes the tasks of sanitary and hygienic monitoring urgent. Rapid methods are convenient for the rapid diagnosis of the genetic well-being of the environment, one of which is the micronucleus test in combination with the cytokinetic block cytochalasin B. mitosis. At the moment, there are scanty data on the inter-latitudinal comparison of the results of cytogenetic studies on cells of various human tissues, which greatly complicates the comparison of the results obtained in the Arctic zone of the Russian Federation with data from more southern regions. The purpose of this study is to identify and compare division abnormalities in cells of peripheral blood lymphocytes in two groups of older schoolchildren living in middle and high latitudes. The study was carried out in the city of Serpukhov, Moscow region (54 ° 54 ‘56 “N, 37 ° 24’ 40” E) and the city of Apatity, Murmansk region (67 ° 34’03 “N, 33 ° 23’36 ″ E). A total of 40 children aged 16-18 were examined - 20 children each from the city of Serpukhov and from the city of Apatity. The micronucleus test was carried out in accordance with the international protocol. Cytogenetic analysis of schoolchildren’s peripheral blood lymphocytes using the micronucleus test showed that the spontaneous number of cells with micronuclei is comparable in middle and high latitudes, and approaches the upper limit of the mean population norm. Therefore, when comparing the data of the micronucleus test on the cells of peripheral blood lymphocytes of the studied groups, it is permissible not to take into account the latitude of residence.
DIVERSITY MANAGEMENT AND SERVICE DELIVERY IN THE NIGERIA AIRLINE INDUSTRY: A CUSTOMERS PERSPECTIVE
Authors: AHMED Mariam Ahuoiza
Published: April 2021

This study sought to assess the effect of diversity management on service delivery in the Nigeria aviation industry from a customers’ perspective due to the observed problem of increasing customer complaints and migration. The study was restricted to customers of the aviation industry in Abuja Nigeria who served as the population of the study. The study adopted the survey research design while multiple regression technique was used to analyze the primary data collected for the study through a structured questionnaire. From a purposefully selected sample of 384 respondents, the study found that age diversity and gender diversity both have a positive and significant effect on service delivery in the Nigerian Aviation Industry. The study therefore recommends that the management of the aviation companies should make concerted efforts towards optimally managing the diversity of their workforce with a good blend of male and female across the younger and older generations in order to maximize service delivery outcomes for the companies and boost performance ultimately.
Optimal ash particle refractive index model for simulating the brightness temperature spectrum of volcanic ash clouds from satellite infrared sounder measurements
Authors: Ishimoto Hiroshi , Hayashi Masahiro , Mano Yuzo
Published: April 2021

Abstract. Using data from the Infrared Atmospheric Sounding Interferometer (IASI) measurements of volcanic ash clouds and radiative transfer calculations, we identify the optimal refractive index model for simulating the measured brightness temperature spectrum of volcanic ash material. We assume that the optimal refractive index model has the smallest root mean square of the brightness temperature difference between measurements and simulations for channels in the wavenumber range of 750–1400 cm−1 and compare 21 refractive index models for optical properties of ash particles, including recently published models. From the results of numerical simulations for 164 pixels of IASI measurements for ash clouds from 11 volcanoes, we found that the measured brightness temperature spectrum could be well simulated using certain newly established refractive index models. In the cases of Eyjafjallajökull and Grímsvötn ash clouds, the optimal refractive index models determined through numerical simulation correspond to those deduced from the chemical composition of ash samples for the same volcanic eruption events. This finding suggests that infrared sounder measurement of volcanic ash clouds is an effective approach to estimating the optimal refractive index model. However, discrepancies between the estimated refractive index models based on satellite measurements and the associated volcanic rock types were observed for some volcanic events.
Strong temporal variation in treefall and branchfall rates in a tropical forest is explained by rainfall: results from five years of monthly drone data for a 50-ha plot
Authors: Araujo Raquel Fernandes , Grubinger Samuel , Celes Carlos Henrique Souza , Negrón-Juárez Robinson I. , Garcia Milton , Dandois Jonathan P. , Muller-Landau Helene C.
Published: April 2021

Abstract. A mechanistic understanding of how tropical tree mortality responds to climate variation is urgently needed to predict how tropical forest carbon pools will respond to anthropogenic global change, which is altering the frequency and intensity of storms, droughts, and other climate extremes in tropical forests. We used five years of approximately monthly drone-acquired RGB imagery for 50 ha of mature tropical forest on Barro Colorado Island, Panama, to quantify spatial structure, temporal variation, and climate correlates of canopy disturbances, i.e., sudden and major drops in canopy height due to treefalls, branchfalls, or collapse of standing dead trees. Treefalls accounted for 77 % of the total area and 60 % of the total number of canopy disturbances in treefalls and branchfalls combined. The size distribution of canopy disturbances was close to a power function for sizes above 25 m2, and best fit by a Weibull function overall. Canopy disturbance rates varied strongly over time and were higher in the wet season, even though windspeeds were lower in the wet season.  The strongest correlate of temporal variation in canopy disturbance rates was the frequency of 1-hour rainfall events above the 99.4th percentile (here 35.7 mm hour−1, r = 0.67). We hypothesize that extreme high rainfall is associated with both saturated soils, increasing risk of uprooting, and with gusts having high horizontal and vertical windspeeds that increase stresses on tree crowns. These results demonstrate the utility of repeat drone-acquired data for quantifying forest canopy disturbance rates over large spatial scales at fine temporal and spatial resolution, thereby enabling strong tests of linkages to drivers. Future studies should include high frequency measurements of vertical and horizontal windspeeds and soil moisture to better capture proximate drivers, and incorporate additional image analyses to quantify standing dead trees in addition to treefalls.