bluuebunny/crossref_metadata_2025 huggingface dataset:
STRUCTURAL AND FUNCTIONAL MODELING OF MARKETING POLICY IN ENSURING THE ECONOMIC SECURITY OF MECHANICAL ENGINEERING
Authors:   V.N. Karazin Kharkiv National University, Kuzmynchuk Nataliia , Lytovchenko Olena ,   V.N. Karazin Kharkiv National University
Published: April 2024

The article analyzes modern scientific approaches to ensuring the economic security of machine-building enterprises based on the marketing concept of mutual relations. It is established that the appropriate marketing policy in industrial markets is focused on the study of the interaction of companies with business consumers, competitors and other interested parties. It was emphasized that due to the balancing of interests between consumers and producers of products, the appropriate level of economic security of enterprises in the machine-building market is achieved, which allows business entities to form stable relations on a mutually beneficial basis and plan their activities in the long term. It is emphasized that in the context of ensuring the economic security of machine-building enterprises, the marketing policy of mutual relations allows reducing the marketing risks of economic security at the expense of the company achieving competitive advantages by establishing, maintaining and developing long-term relationships with partners in the process of improving production, promotion and sales of products in order to create the value that wants to get a buyer. A conceptual model of the marketing policy of the relationship between the supplier and the consumer in the context of ensuring the economic safety of mechanical engineering has been formed. It is proposed to include elements of the marketing complex in the marketing policy of relations: management of product quality, price / costs, distribution, promotion and quality of service. It has been proven that this approach contributes to the balancing of interests between sellers and buyers of engineering products in the process of ensuring economic security. The complex of works related to the planning and implementation of the marketing policy of mutual relations is proposed to be solved with the help of a process approach based on structural-functional modeling tools, which allows you to streamline the course of action and quickly adjust all aspects of the marketing policy within the framework of a long-term business partnership.
ТЕНДЕНЦІЇ ЦИФРОВОЇ ТРАНСФОРМАЦІЇ УПРАВЛІННЯ ПЕРСОНАЛОМ ЕКОНОМІЧНИХ СИСТЕМ В УМОВАХ БЕЗПЕКОВОГО ІНФОРМАЦІЙНОГО СЕРЕДОВИЩА
Authors: Гришина Н.В.
Published: April 2024

У сучасних умовах функціонування глобального світу важливе місце займають процеси формування інформаційного суспільства, які визначають напрями економічного та соціального розвитку міжнародної й національної економіки. Обґрунтовано засади та визначено пріоритети цифрової трансформації економічних систем в умовах інформаційного середовища. Метою даного дослідження є визначення тенденцій цифрової трансформації економічних систем в умовах інформаційного середовища. Визначено основні виклики та тенденції трансформації економічних систем в умовах цифровізації, серед яких: підвищення значення мережевих інституцій для функціонування суспільства; прискорення економічної динаміки та скорочення тривалості життєвого циклу економічних систем; зміна технологічних укладів; посилення впливу віртуального простору. Проведено аналіз динаміки зайнятості населення України. Визначено, що надання Україні статусу кандидата в члени ЄС сприяє імплементації європейських підходів до регулювання цифрових ринків та гарантуватиме безпечне й надійне онлайн-середовище, конкурентні умови діяльності для всіх учасників ринків цифрових послуг, захист прав і законних інтересів користувачів таких послуг. Встановлено, що в умовах війни на території України одним із важливих напрямів цифрових трансформацій є використання блокчейн-технологій, що, зокрема, може стати ключовим інструментом і для сучасного HR. Наголошено, управління персоналом економічних систем в умовах безпекового інформаційного середовища є важливим аспектом сучасного бізнесу: забезпечення інформаційної безпеки даних та інформації про працівників, підвищення рівня цифрової компетентності, адаптація до цифровізації в навчанні та розвитку, а також використовувати інформаційні технології для підтримки. Запропоновано основні виклики та тенденції трансформації економічних систем в умовах безпекового інформаційного середовища: підвищення значення мережевих інституцій для функціонування суспільства; прискорення економічної динаміки та скорочення тривалості життєвого циклу економічних систем; зміна технологічних укладів; посилення впливу віртуального простору.
Acclimation of Agave potatorum Zucc. micropropagated plants
Authors: Campos-Angeles Gisela-Virginia , Alcara Vazques Sergio , Enriquez del Valle Jóse Raymundo , Rodríguez-Ortiz Gerardo , Velasco Velasco Visente Arturo
Published: April 2024

Objective: Agave potatorum Zucc. is an intensively exploited wild plant species. We intend to evaluate how the concentration of mineral salts (MS), indole-butyric acid (IBA), and the incubation conditions affect in vitro-rooted A. potatorum during acclimation.
Design/Methodology/Approach: We conducted 18 treatments that resulted from combining three factors: 1) MS concentrations (50%, 75%, and 100%); 2) IBA concentrations (without auxin, 0.5 mg L-1, and 1 mg L-1); and 3) incubation environments (fluorescent lighting in a laboratory or exposure to solar radiation in a greenhouse). Thirteen plants from each treatment were transplanted into individual pots containing a 1:1 mixture of peat moss and perlite. These were placed in the acclimation greenhouse for 150 days, exposed to changes in solar radiation, starting from 600 µmol m-2 s-1 and conditions of high relative humidity (80-90%), and reaching outdoor conditions with full solar radiation,1400 ±200 µmol m-2 s-1. All in vitro culture plants, both in greenhouse and laboratory, underwent the same environmental and management conditions.
Results: After 150 days of acclimation, plants micropropagated in a culture medium with 0.5 to 1 mg L-1 of IBA, 100% MS, and incubated in a greenhouse showed better growth.
Study limitations/Implications: The in vitro culture protocol was (successfully) modified by providing solar radiation in a greenhouse during the rooting of A. potatorum sprouts.
Findings/Conclusions: Solar radiation during in vitro incubation of A. potatorum favors its acclimation.
The effect of the Stevia rebaudiana Morita II on the warts caused by fowl pox in Meleagris gallopavo as model study
Authors: CAAMAL VELAZQUEZ JOSE HUMBERTO , Ramírez-Benítez José E. , Itza Can Jorge A. , Carrillo-Segura Iliana E. , Domínguez-May Ángel V.
Published: April 2024

O
Objective: to evaluate the effect of leaves of Stevia rebaudiana Morita II on swelling caused by fowl pox in backyard turkeys of the Meleagris gallopavo species.
Design/methodology/approach: Different percentages of ground stevia leaves (5.5, 15, 20 and 25%) combined with ground corn were evaluated and the reduction of avian pox in turkeys was evaluated.
Results: The diet with 5% stevia leaves with corn was the most accepted combination by the turkeys; it also leads to immunomodulation to eliminate avian pox in a period of 30 days.
Limitations on study/implications: One of the main limitations is the production of stevia matter, however, due to the required amount, it has the possibility of being applied in the feeding of these animals, this study has applications in animal health and food safety in turkeys.
Findings/conclusions: The use of stevia in combination with corn could represent a natural alternative for the treatment of fowl pox and be profitable enough to prevent the death of turkeys.
La pintura rupestre mural ecológico
Authors: Bestard Maggio Andrés
Published: April 2024

Las pinturas rupestres como los petroglifos y geoglifos son los antecedentes más antiguos del mural en América, incorporándose al paisaje en forma ecológica. La pintura rupestre de Cerro Colorado, Córdoba, Argentina fue comparada con los conceptos básicos y definiciones del mural. El estudio del lenguaje originario brinda la posibilidad de ingresar a un espacio atemporal y sin límites en sus planos físicos, psíquicos y espirituales, por aplicar una perspectiva cósmica con visión de totalidad, aceptando ser parte de un todo, utilizando un lenguaje innato de arquetipos, esenciales en la comunicación humana.

Rock paintings such as petroglyphs and geoglyphs are the oldest antecedents of the mural in America, incorporating them into the landscape in an ecological form. The rock painting of Cerro Colorado, Córdoba, Argentina was compared with the basic concepts and definitions of the mural. The study of the original language provides the possibility of entering a timeless space without limits in its physical, psychic and spiritual planes, by applying a cosmic perspective with a vision of totality, agreeing to be part of a whole, using an innate language of archetypes, essential in human communication.
Banking Instruments for Credit Collateral of Large Enterprises in Ukraine
Authors:   Odesa National Economic University, Harkusha Yuliya O. , Matushevska Viktoriia Yu. ,   Odesa National Economic University
Published: April 2024

The article highlights the theoretical and practical foundations of lending to domestic large enterprises. The main types of the bank lending to corporate clients are allocated and characterized. It is noted that in the process of lending relations, representatives of large businesses are offered a fairly wide range of loans and the related services, namely: term services, investment loans, loans for current activities, promissory notes, commercial mortgages, acceptance and guarantee loans, financial leasing, factoring, forfaiting. Based on the carried out analysis of the dynamics of bank credit investments in the economy and the development of large enterprises in Ukraine, it was concluded that loans granted to large enterprises during the research period make up about a third of the total volume of all loans received by economic entities. The carried out assessment of the dynamics and structure of loans granted to large enterprises in terms of repayment terms indicates the predominance of short-term loans for the period under study. On the basis of the carried out research, conclusions were drawn and specific proposals were made regarding the improvement of the process of lending to large enterprises, which include: the implementation of effective national and regional programs for lending to large enterprises, as well as the creation of programs for reimbursing or subsidizing interest rates on loans; application in the process of bank lending of detailed target segmentation of customers, taking into account the field of activity, seasonality of production, financing model; creation of opportunities for concessional lending to enterprises by means of the development of new banking products aimed specifically at the target borrower, offering, in parallel with lending, service for management of enterprise profit and the provision of financial consulting services to minimize potential risks of the borrower.
Financial Potential of the Solidarity Pension System of Ukraine and Ways to Improve It
Authors:   Podillia State University, Rudyk Volodymyr K.
Published: April 2024

The solidarity pension system currently plays a major role in the functioning of the pension system of Ukraine. It is the first level of the domestic pension system that accounts for the main financial burden of pension payments to Ukrainian citizens. The aim of the scientific article is to assess the financial potential of the solidarity pension system of Ukraine, determine the impact of various factors on its condition and search for additional sources of financing pension payments for citizens of retirement age. The article pays special attention to the analysis of the challenges that society has received under martial law in the country, and their impact on the features of the financial provision of the pension sector. The results of the study show that the crisis in the national economy, as well as negative trends in the demographic sphere, significantly affected the financial condition of the main financial institution of the solidarity pension system – the Pension Fund of Ukraine (PFU). During the study period, the Pension Fund’s own financial resources are not enough to fulfill its obligations to Ukrainian pensioners, so there is a deficit of the PFU. It is determined that it is covered by the State Budget of Ukraine, as well as financial resources of international financial organizations. Attention is drawn to the fact that the minimum and average pensions of Ukrainian pensioners, although they tend to increase, are much lower than the incomes of citizens of retirement age in most European countries. In order to promote the diversification of sources of income for citizens of retirement age, to raise their level to European standards, it is necessary to introduce a mandatory accumulative pension system. It is noted that accumulative pension programs together with redistributive ones will contribute to strengthening the financial potential of the pension sector and increasing the incomes of Ukrainian pensioners.
A Study on Enhancing the Safety Competency Evaluation in the Bidding System
Authors:   KOREA ASSOCIATION OF REAL ESTATE LAW, Jun Kyung-chul , Lee Choon-won
Published: April 2024

To mitigate industrial accidents, various societal sectors, including the government, have been actively implementing measures. These include revising laws to bolster industrial safety and enhancing related standards. Despite these policy efforts, the rate of industrial accidents has not significantly decreased. A primary reason for the persistence of safety incidents in the construction industry is the selection of contractors with inadequate safety and health standards during the bidding process.
This study explores legal improvements enabling local governments and public companies to prioritize bidders with proven safety capabilities. It examines the Occupational Safety and Health Act, the Local Contract Act, and safety assessment systems in other countries to fulfill this objective.
Our research indicates the necessity of implementing a safety competency evaluation prior to finalizing the successful bidder. Additionally, it highlights the need for enhancements in the contract-related system to support this initiative.
A Study on the Application of Family Business Inheritance Deduction to Apartment Housing Management Business
Authors:   KOREA ASSOCIATION OF REAL ESTATE LAW, Seo Jinseok
Published: April 2024

In order to support the stable life of the heirs and their families even after the death of the decedent, the Inheritance Tax and Gift Tax Act provides for deductions of a certain amount of money in consideration of the personal situation of the heirs and the material situation of the inherited property, and stipulates the family business inheritance deduction system.
Accordingly, the Korea Housing Management Association announced that 2023. 9. Through an inquiry to the competent authority, the condominium management business was inquired whether the condominium management business is eligible for the deduction of the family business inheritance company, and the competent authority replied that the condominium management business is not a company eligible for the deduction of the family business inheritance business.
However, it is necessary to re-examine whether the condominium management business is included in the family business inheritance deduction related to Article 15, Paragraphs 1 and 2 of the Enforcement Decree of the Inheritance Tax and Gift Tax Act.
First, since the Special Act on the Safety and Maintenance of Facilities defines apartment houses as buildings and classifies them as facilities, it should be interpreted to include the business facility management and business resource service businesses among the business facility management and business resource service businesses that are subject to the family business inheritance deduction according to the Korean Standard Industrial Classification for small and medium-sized enterprises eligible for family business inheritance deduction.
Second, the same article [Annex] of the same Act defines the types of business under the provisions of individual laws and includes the housing rental management business under the “Special Act on Private Rental Housing”, but the Private Rental Housing Act applies to matters not stipulated in this Act with respect to the construction, supply and management of housing, etc., and thus applies to the “Housing Act”, “Building Act”, “Apartment Housing Management Act”, and “Housing Lease Protection Act”.
In the same way that the housing rental management business under the Special Act on Private Rental Housing is defined as a company subject to the family business inheritance deduction under the individual law, the condominium management business under the Apartment Housing Management Act, which has the same content, should be included as a company subject to the family business inheritance deduction under the individual law.
A Study on the Major lssues of Statutory Superficies of Real Estate
Authors:   KOREA ASSOCIATION OF REAL ESTATE LAW, Park Kyutae , Chun Hae-Jung
Published: April 2024

This study was initiated in consideration of issues such as the introduction of statutory superficies and legal superficies under customary law excessively restricting land ownership. Major issues were examined through case studies and literature reveiws on statutory superficies related to 3,761 properties auctioned by the Suwon District Court Seongnam Branch from January 2018 to December 2022, and measures to improve statutory superficies were studied.
As a result of the analysis, statutory superficies mainly occur on land, farmland, and forests and do not occur in new buildings such as apartments but most occur in unregistered buildings, unauthorized constructions, and aging houses.
To address these issues, first, it is necessary to calculate the remaining period of a building considering its value and determine it as a condition for auction. Second, the application of legal superficies under customary law to unauthorized constructions is unnecessary. Third, there is no need to excessively expand legal superficies under customary law. Fourth, it is necessary to ease the right to claim collective auctions to prevent the demolition of buidlings and facilitate auctions. Lastly, the introduction of a statutory superficies registration order system is needed to enhance the disclosure function of statutory superficies.
In memoriam Prof. Dr. Dr.h.c.mult. György Jenei
Authors: Drechsler Wolfgang
Published: April 2024

Professor Dr. Dr.h.c.mult. György Jenei, the doyen of Central and Eastern European Public Administration, passed away peacefully on 4 February 2024; born in 1942, he was 82 years old. He was for many decades the leading figure of the field in our region; he personified it; he had preserved it during darker times; and he had led it again to prominence since 1989, with persistence, integrity, and style. He did so both in form and in contents – the former both at his home, Corvinus University of Budapest, and in his many leadership functions in professional and scholarly associations, including the NISPAcee Presidency during the crucial years of the Global Financial Crisis. And he truly did carry the torch of Public Administration during the times when its inefficiency was not an accident, but a core part of the local system; Professor Jenei’s early work on Max Weber was undertaken at a time when this was a politically highly incorrect thing to do.
Book Review: The scaffolding is on and Public Administration literature will change
Authors: Shakya Shobhit
Published: April 2024

With the attempt to put behind the fallacy of considering the doctrine of separation of religion and state as an ideal for Public Administration (PA) globally, Edoardo Ongaro and Michele Tantardini (2023) have brought out an important book that makes an important contribution to the field of PA. The book not only reinforces the recognition of the significant impact that religion has on the studies and practice of PA but, more importantly, helps to establish a framework that could serve as the groundwork for future research in this field.
Tourism and Recreational Industry for Rural Development in Ukrainian Mountains
Authors:   Institute for Demography and Life Quality Problems, National Academy of Sciences, Kyiv, Ukraine, Ilina Mariia ,   & Western Paraná State University, Av. Tarquínio Joslin dos Santos, 1300, Jardim Universitário, Foz do Iguaçu, Brazil.  Email: maria_ilina@ukr.net, Alves Fabio Lopes ,   Western Paraná State University, R. Universitária, 1619, Universitário, Cascavel, Brazil.  Email: fabiobidu@hotmail.com
Published: April 2024

This article addresses how to develop national and local policy on tourism and recreation in mountainous rural areas considering the recreational capacity, demographic patterns and economic situations, with an emphasis on local livelihoods. Management of recreational natural resources is an integral component of the national environmental policy. It is considered that the recreational natural resources management is broader than the recreational industry management, since the former covers protection and restoration of the resources. The multiplier economic effect and joint use of recreational resources by various users are the key issues for the industry. Evidently, almost in all the Ukraine’s regions, accessible recreational resources are not used efficiently enough. In order to evolve an appropriate sustainable tourism policy, a multilevel algorithm is developed on how to classify areas depending on the recreational resources and tourism industry. The algorithm supplies several policy models of the recreational industry’s development, taking into account the types of settlements (urban, rural, intermediate, and mountainous), proximity of settlements to urban centres (urbanized and peripheral), recreational capacity of areas (high, medium, low), and economic efficiency of local recreational industry (productive, semi-productive, unproductive). Accordingly, three types of communities’ development strategies have been suggested. They include the recreational focus, profound recreational industry, and recreations for locals. The novelty of this research is that it presents the approach on how to assess the capacity of local recreational recourses and the industry. The multilevel algorithm is proposed to classify areas and define better approaches for the local policies.
Inferencia informal: del análisis de los datos a la inferencia estadística. María Inés Rodríguez
Authors: Rodríguez María Inés
Published: April 2024

Todo curso introductorio de estadística a nivel universitario tiene como propósito llegar a desarrollar los métodos de inferencia estadística. Siendo éste uno de los temas más enseñados es, a la vez, el peor comprendido y utilizado. Esto ha preocupado a la comunidad internacional de expertos dedicados al estudio e investigación en Educación Estadística nucleados en la IASE (International Association for Statistics Education) quienes, reconociendo el papel delconocimiento estadístico en la formación elemental, desde 1999 vienen realizando cada dos añosForos de estudio sobre “Razonamiento, Pensamiento y Alfabetización Estadística” (SRTL) 1. Estos foros, inicialmente abordaron los diferentes tipos de razonamiento estadístico, llegando en 2005, al consenso de que los estudiantes deben aprender a realizar inferencias, inicialmente demanera informal. Esto significa, que la inferencia estadística debe ser desarrollada en etapas, a lo largo de varios años, recomendando comenzar entre los 14-17 años. En este trabajo se presentan algunas reflexiones surgidas a partir de la bibliografía revisada, definiciones y aspectosfundamentales a considerar, finalizando con la descripción de una actividad áulica que puedecontribuir al desarrollo del razonamiento inferencial informal, preparando así al estudiante para una mejor comprensión y aplicación de la inferencia en niveles superiores y trabajo futuro.
Una experiencia con futuros profesores basada en la formulación y contrastación de conjeturas
Authors: Rougier Cinthia , Scaglia Sara
Published: April 2024

En este trabajo se describe una experiencia áulica desarrollada con futuros profesores de matemática, con el objetivo de generar la posibilidad de que los estudiantes tengan la oportunidad de desarrollar procesos de formulación y contrastación de conjeturas durante su formación disciplinar. Las intervenciones del docente y de los alumnos permiten avanzar en la formulación de conjeturas con creciente grado de generalidad. En el ejemplo presentado, las conjeturas formuladas se demuestran mediante una actividad de justificación desarrollada a partir de las interacciones entre el docente y los alumnos. Se ponen de manifiesto algunas de las dificultades inherentes a este tipo de trabajo, como por ejemplo la posibilidad de que algunas discusiones no puedan ser seguidas por todos los alumnos, cuestión que se agudiza cuando se trata de cursos numerosos. Más allá de estas limitaciones, la experiencia se valora como muy fructífera para todos los participantes, lo que conduce a subrayar la pertinencia de que los futuros profesores puedan familiarizarse con este tipo de trabajo durante su formación inicial.
Incorporacion de las TICs en el aprendizaje de la matemática en el sector universitario
Authors: Sánchez Rosal Andrés Alexander
Published: April 2024

El presente artículo tiene como propósito presentar a los docentes universitarios de matemática, en primer lugar los fundamentos didácticos y psicológicos que determinan el uso adecuado de las TICs en el aprendizaje de la matemática, y en segundo lugar sugerir las diversas estrategias metodológicas y los recursos tecnológicos apropiados que favorecen el aprendizaje dinámico de esta ciencia de forma interactiva en diversos espacios educativos que permitan a los estudiantes discutir ideas, colaborar en la resolución de problemas e incentivar la reflexión para el desarrollo del pensamiento matemático. En este sentido, se expone una orientación teórica a los docentes con la finalidad de que implementen las TICS durante su accionar pedagógico en la enseñanza de la matemática universitaria. Dentro de este artículo se enfatiza la importancia de los procesos de visualización que permita la asimilación de conceptos abstractos en base de imágenes o representaciones que las TICs proporciona. En tal caso, se recomienda la incorporación de los recursos tecnológicos de forma paulatina como complemento de la enseñanza tradicional implementada por los docentes de matemática en las aulas universitarias.AbstractThe present article has as intention present the university teachers of mathematics,first the didactic and psychological foundations that determine the suitable use ofthe TICs in the learning of the mathematics, and secondly suggest the diversemethodological strategies and the technological appropriate resources that favor thedynamic learning of this science of interactive form in diverse educational spacesthat allow to the students to discuss ideas, to collaborate in the resolution of problems and to stimulate the reflection for the development of the mathematical thought. In this respect, a theoretical orientation is exposed to the teachers by the purpose of which they implement the TICs during his to gesticulate pedagogically in the education of the university mathematics. Inside this article there is emphasized the importance of the processes of visualization that allows theassimilation of abstract concepts in base of images or representations that provides the TICs. In such a case, there is recommended the incorporation of the technological resources of gradual form as complement of the traditional education implemented by the teachers of mathematics in the university classrooms.
Una ampliación al teorema de Pitágoras
Authors: Vasquez Bernal Marco Vinicio
Published: April 2024

Uno de los teoremas mas ampliamente difundidos en las matemáticas es el de Pitágoras, con sus múltiples demostraciones y aplicaciones, más en la educación actual su uso es mecánico y se lo ha reducido a una fórmula estática y fría, despojando a la misma de la grandiosidad que encarna la relación álgebra–geometría y que es la escencia de la mencionada herramienta de la matemática. Es necesario entonces explicar y entender el sentido del teorema mencionado, para así explicar su relevancia científica, que se basa en la relación constante que existe entre la ciencia matemática y la realidad.
El teorema de Bayes
Authors: Soto Gabriel
Published: April 2024

Las probabilidades condicionales y el Teorema de Bayes conviven con nosotros en las formas más insólitas. El uso de la fórmula de Bayes no es simple (para mi siempre fue dificultoso utilizarla correctamente), sin embargo existen alternativas que permiten aplicar el resultado sin hacer uso de la fórmula. Este artículo surgió de un taller encuadrado dentro de la Primeras Olimpíadas del Golfo San Jorge, desarrollado en agosto del 2010. Sin entrar en los detalles matemáticos técnicos, mostraremos algunos ejemplos sobre el uso del Teorema de Bayes en contexto, y que pueden servir como actividades motivadoras para introducir estas ideas importantes en el aula.
Articulación de representaciones en Álgebra
Authors: Ferrero Mariaq Martha
Published: April 2024

Este trabajo consta de dos partes: en la primera se presentan algunos aspectos del marco teórico del Álgebra Temprana, en particular sobre artículos de Brizuela, Carraher, Kaput, Schliemann y otros, y en la segunda (de investigación) se presenta la descripción y análisis, en base a este marco teórico, de una implementación en clase en un 5 o año de una escuela media de Bariloche (Argentina) y de dos entrevistas clínicas posteriores a la clase. El objetivo del trabajo es dar cuenta de distintas representaciones externas utilizadas por los estudiantes en la resolución de una actividad de álgebra. Estamos interesados en prestar especial atención a la articulación que un mismo estudiante hace entre distintas representaciones de una situación, bajo la hipótesis de que una multiplicidad de representaciones ayuda a construir un mejor entendimiento de los conceptos involucrados (Brizuela, 2005; Goldin, 1998).
Atención a la diversidad: Detección del talento en Matemática en alumnos de 7º – 8º Años de EGB 3 de la Ciudad de Concordia
Authors: Gay Mabel Alicia
Published: April 2024

Se presenta en forma sintética la investigación realizada en la ciudad de Concordia, Entre Ríos, Argentina durante los años 2004-2005 para detectar alumnos de 7o -8o años de EGB 3 con talento en matemática. Se selecciona una muestra aleatoria estratificada de 726 alumnos provenientes de 13 escuelas de gestión pública y privada, del núcleo urbano y rural de la ciudad. En una primera fase de screening se aplican: el test de Matrices Progresivas de Raven (escala general), escala de Renzulli-Hartman sobre los aspectos de creatividad, aprendizaje, liderazgo y motivación; nominación por pares y nominación a cargo del docente de matemática. De la fase de screening se seleccionan, con criterio inclusivo, 183 alumnos que son evaluados en la fase confirmatoria con una prueba de nivel superior, utilizando situaciones problemáticas complejas. Se analizan los resultados obtenidos con Análisis Factorial de Correspondencias entre las distintas variables estudiadas y se confirman a 42 alumnos como alumnos con talento en matemática, lo que representa un 5, 78% de la muestra.Se observa en los docentes una concepción incompleta del alumno con talentoespecífico. Se confunde talento con buen rendimiento académico participación en clase, buena conducta. La nominación por pares, en cambio, refleja un mayor acercamiento a los resultados obtenidos. Se invita a los alumnos detectados por el proyecto a concurrir a un espacio peri escolar de entrenamiento en resolución de problemas. Concurren voluntariamente 22 alumnos que participan, con muy buen desempeño, en distintos certámenes propuestos por Olimpíadas Matemáticas Argentina durante el año 2005.La investigación sirve como elemento disparador de inquietudes para la Dirección deEducación Especial de la Provincia de Entre Ríos.
¿Cómo ordenar una lista de números?
Authors: Torres Germán Ariel
Published: April 2024

Este trabajo trata acerca de métodos y técnicas usadas para el ordenamiento eficiente de listas de números. Se analizan los métodos básicos, bubble, insertion, selection y shell, y los más elaborados como heapsort y quicksort, ejemplificados con casos sencillos desarrollados paso a paso. Finalmente se realiza una comparación sobre tiempos de ejecución para listas de un gran número de elementos.
Rango numérico de una matriz compleja
Authors: Martínez Ana Gabriela , Pilotta Elvio O.
Published: April 2024

En este trabajo se estudia el concepto de rango numérico de una matriz compleja y se presenta un algoritmo para obtener una representación aproximada en el plano complejo del rango numérico de una matriz compleja.Se muestran algunos ejemplos numéricos y su representación gráfica
El sentido de las funciones en la ensenanza
Authors: Fernández de Tassara Alicia , Detzel Patricia , Ruiz Maria Elena
Published: April 2024

En este artículo haremos referencia a algunos aspectos de la enseñanza de funciones en el niYel medio. Intentaremos poner de relieve la importancia que tienen las situaciones problemáticas en la enseñanza, donde la función es una herramienta de resolución necesaria para modelizar relaciones entre distintas magnitudes. Finalmente. presentaremos a modo de ejemplo dos situaciones problemáticas, su resolución y análisis.
Series Geométricas Generalizadas
Authors: Gómes Marisol , Induráin Esteban
Published: April 2024

Persiguiendo fines didácticos, analizamos distintas generalizaciones del concepto de serie geométrica, haciendo aparecer conexiones profundas con distintas ramas de la matemática
Engranajes y mejores aproximaciones racionales
Authors: Berrone Lucio R.
Published: April 2024

Motivado por la construcción de sistemas de ruedas dentadas con determinada relación de transmisión, se discute el problema de aproximar un número real ? por una fracción racional P/Q de manera que el error de aproximación sea menor que el que resultaría de tomarcualquier otra fracción con denominador más pequeño.
Un problema-experiencia para integrar conocimientos
Authors: Alía de Saravia Dolores
Published: April 2024

Se presenta un problema clásico del área de las curiosidades matemáticas, la "transforma ción de un cuadrado en un rectángulo de área diferente", como motivador del estudio y/o de la aplicación y/o de la experimentación de varios aspectos de matemática básica.El problema se describe como formando parte de una situación áulica, ficticia, en la que los alumnos son aspirantes a ser profesores de matemática. De cada alumno se espera que, además de interpretar, resolver y experimentar sea protagonista en producir enunciados precisos de ejercicios, en los temas que más le interesen, a partir de propuestas no tan precisas por parte del profesor o profesores y de los otros alumnos; y que sea también espectador y crítico de las actividades de los demás.
Sobre la enseñanza de estadistica al nivel medio en la Argentina
Authors: Mentz Raul Pedro
Published: April 2024

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Los problemas -Un instrumento para la enseñanza-
Authors: Ferraris Cristina , Siñeriz Liliana
Published: April 2024

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Algunas reflexiones sobre la racionalización
Authors: Bidart Gauna Gastón , Cabral Gastón , Cafure Antonio , Cambriglia Verónica , Fuentes Carlos
Published: April 2024

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UNA MIRADA SOBRE EL OPERATIVO APRENDER
Authors: Villarreal Mónica
Published: April 2024

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El Principio de los Casilleros
Authors: Gentile Enzo
Published: April 2024

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Unidades de Medida
Authors: U. Molter N. Fava,
Published: April 2024

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Construcciones con Regla y Compás
Authors: Ferraris Cristina
Published: April 2024

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El matemático que desafió a los dioses
Authors: Carman Christián
Published: April 2024

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Sobre cartas, descartes, y un problema de Josephus
Authors: D'Andrea Carlos , Paenza Adrián
Published: April 2024

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Estudiantes de escuela secundaria pensando los números racionales
Authors: Palacios Amaya Maximiliano , Bianchi Verónica , Montoro Virginia
Published: April 2024

En el marco de un estudio sobre las concepciones de estudiantes de secundaria acerca de los números racionales, se diseñó un cuestionario con cuatro actividades orientadas a indagar dicha comprensión. Se aplicó este cuestionario a 132 estudiantes de distintos años de escolaridad, de una escuela secundaria pública de Bariloche (Argentina). Se categorizaron las respuestas a cada una de las actividades con controles inter-juez. Posteriormente se realizó un Análisis Factorial de Correspondencias Múltiple y Clasificación Jerárquica de las respuestas de los estudiantes y se buscaron asociaciones de las clases resultantes con el nivel de estudio de los mismos. En cuanto a las concepciones de los estudiantes, encontramos un  gradiente que se expresa desde una ajenidad respecto al tema, le sigue una fase intermedia asociada principalmente con relacionar los números racionales con objetos previamente vistos como son los números enteros o números decimales y finalmente encontramos una comprensión de los racionales mas cercana al respectivo concepto matemático y un buen manejo general de las propiedades de orden y densidad, presente en los estudiantes más avanzados.
Ticari Dışa Açıklığın Ekonomik Büyüme Üzerindeki Etkisi: Türkiye İçin Kesirli Frekanslı Fourier Adl Yaklaşımı
Authors: Yağış Onur
Published: April 2024

Ticari dışa açıklık, mal ve hizmetlerin dolaşımının kısıtlama olmaksızın gerçekleştirilmesi ve üreticiler arasında rekabeti engelleyici sınırlamaların bulunmamasıdır. Bu araştırmada Türkiye ’de ticari dışa açıklığın ekonomik büyüme üzerindeki etkisinin 1970-2022 dönemi için incelenmesi amaçlanmaktadır. Çalışmada kesirli frekanslı Fourier ADF ve Fourier ADL teknikleri ile eş bütünleşme katsayı tahmincileri kullanılmıştır. Çalışmanın sonucunda, ticari dışa açıklık, gayri safi sabit sermaye yatırımları ve yabancı sermaye girişlerinin ekonomik büyüme üzerinde pozitif bir etki yarattığı sonucu bulunmuştur. Bu çalışmada konuya dair kullanılan ekonometrik uygulama Türkiye örneğindeki ilk çalışmadır.
A novel neurotropic microsporidium from the swamp guppy Micropoecilia picta from Grenada, West Indies
Authors: Schuster CJ , Marancik DP , Couch CE , Leong C , Edwards JJ , Kaplan RM , Kent ML
Published: April 2024

A novel microsporidium was observed in wild swamp guppies Micropoecilia picta from Levera Pond within Levera National Park Grenada, West Indies. Initial observations indicated similarity with Pseudoloma neurophilia, an important pathogen in zebrafish Danio rerio. P. neurophilia exhibit broad host specifity, including members of the family Poecillidae, and both parasites infect the central nervous system. However, spore morphology and molecular phylogeny based on rDNA showed that the swamp guppy microsporidium (SGM) is distinct from P. neurophilia and related microsporidia (Microsporidium cerebralis and M. luceopercae). Spores of the SGM were smaller than others in the clade (3.6 µm long). Differences were also noted in histology; the SGM formed large aggregates of spores within neural tissues along with a high incidence of numerous smaller aggregates and single spores within the surface tissue along the ventricular spaces that extended submeninx, whereas P. neurophilia and M. cerebralis infect deep into the neuropile and cause associated lesions. Analysis of small subunit ribosomal DNA sequences showed that the SGM was <93% similar to these related microsporidia. Nevertheless, one of 2 commonly used PCR tests for P. neurophilia cross reacted with tissues infected with SGM. These data suggest that there could be other related microsporidia capable of infecting zebrafish and other laboratory fishes that are not being detected by these highly specific assays. Consequently, exclusive use of these PCR tests may not accurately diagnose other related microsporidia infecting animals in laboratory and ornamental fish facilities.
Occurrence of Stenurus globicephalae (Nematoda: Pseudaliidae) in the blowhole of Globicephala macrorhynchus (Cetacea: Delphinidae) in Tasmania, Australia
Authors: Shamsi S , Moravec F , Barton DP
Published: April 2024

Information about parasites of cetaceans in Australia is scarce and mostly opportunistic. The morphology of specimens of the metastrongyloid Stenurus globicephalae Baylis & Daubney, 1925 (Nematoda: Pseudaliidae), collected from the blowhole of a pilot whale Globicephala macrorhynchus Gray, 1846 (Cetacea: Delphinidae) off northern Tasmania, Australia, were studied. Light and scanning electron microscopical examinations enabled a detailed redescription of this nematode species, including corrections of some inaccuracies in previous species descriptions, particularly those concerning cephalic and caudal structures. The presence of numerous ventrolateral oblique muscle bands, characteristic of the males of S. globicephalae, is reported for the first time. This is the second finding of this nematode parasite, in a different host species, in Tasmania.
A kolonoszkópia aktuális helyzete, indikációi
Authors: Vincze Áron
Published: April 2024

A kolonoszkópia lehetővé teszi a teljes vastagbél vizuális megtekintését a végbéltől a vakbélig. Továbbra is arany standard a polipok és a vastagbélrák kimutatásában. Az eljárás biztonságos és hatékony eszköz a vastagbél vizsgálatára. A vastagbélrák szűrése és követése a kolonoszkópia leggyakoribb indikációja. A kolonoszkópia a technológiai fejlődés révén jó minőségű és nagy felbontású képet ad a nyálkahártyáról. Az újabb technológiák lehetővé teszik a szövettani előrejelzést, és segítenek meghatározni az eltávolítás megfelelő módját. A premalignus vagy malignus léziók eltávolítása mellett egyéb terápiás intervenciók is gyakran történnek kolonoszkópia során. Az eljárás hatékonyságának és biztonságosságának ellenőrzését minőségi mutatók segítik, monitorozásuk lehetővé teszi a szolgáltatás színvonalának és ezen keresztül a betegellátás minőségének folyamatos javítását.
La Séparation tragique: les lieux et l’espace dans Médée, Bérénice et Ariane
Authors: Calle Delphine
Published: April 2024

This article analyses the mise en scène, or rather the mise en espace, of amorous separation in three seventeenth-century tragedies: Médée by Pierre Corneille (1635), Bérénice by Racine (1670) and Ariane by Thomas Corneille (1672). How is the tragic love of these three heroines – each so different, yet all abandoned by their lovers – inscribed into the theatrical space and the multiple geographies evoked in the tragedies? An examination of fictional places on and off stage demonstrates how the place represented on stage functions as a transitional place: while it should represent the union of the couple, it actually prepares for their separation as it opens onto the vast spaces of a past and a future lived elsewhere.
Development of a new loop-mediated isothermal amplification test for the sensitive, rapid, and economic detection of different genotypes of Classical swine fever virus
Authors: Bohórquez Jose Alejandro , Muñoz-Aguilera Adriana , Lanka Saraswathi , Coronado Liani , Rosell Rosa , Alberch Mònica , Maddox Carol W. , Ganges Llilianne
Published: April 2024

Background

Classical swine fever virus (CSFV) remains one of the most important pathogens in animal health. Pathogen detection relies on viral RNA extraction followed by RT-qPCR. Novel technologies are required to improve diagnosis at the point of care.

Methods

A loop-mediated isothermal amplification (LAMP) PCR technique was developed, with primers designed considering all reported CSFV genotypes. The reaction was tested using both fluorometric and colorimetric detection, in comparison to the gold standard technique. Viral strains from three circulating CSFV genotypes were tested, as well as samples from infected animals. Other pathogens were also tested, to determine the LAMP specificity. Besides laboratory RNA extraction methods, a heating method for RNA release, readily available for adaptation to field conditions was evaluated.

Results

Three primer sets were generated, with one of them showing better performance. This primer set proved capable of maintaining optimal performance at a wide range of amplification temperatures (60°C - 68°C). It was also able to detect CSFV RNA from the three genotypes tested. The assay was highly efficient in detection of samples from animals infected with field strains from two different genotypes, with multiple matrices being detected using both colorimetric and fluorometric methods. The LAMP assay was negative for all the unrelated pathogens tested, including Pestiviruses. The only doubtful result in both fluorometric and colorimetric LAMP was against the novel Pestivirus italiaense, ovine Italy Pestivirus (OVPV), which has proven to have cross-reaction with multiple CSFV diagnostic techniques. However, it is only possible to detect the OVPV in a doubtful result if the viral load is higher than 10000 viral particles.

Conclusion

The results from the present study show that LAMP could be an important addition to the currently used molecular diagnostic techniques for CSFV. This technique could be used in remote locations, given that it can be adapted for successful use with minimal equipment and minimally invasive samples. The joined use of novel and traditional diagnostic techniques could prove to be a useful alternative to support the CSF control.
Comprehensive assessment of HF-rTMS treatment mechanism for post-stroke dysphagia in rats by integration of fecal metabolomics and 16S rRNA sequencing
Authors: Zhao Fei , Chen Jiemei , Shan Yilong , Hong Jiena , Ye Qiuping , Dai Yong , Hu Jiahui , Zhang Jiantao , Li Chao , Wen Hongmei
Published: April 2024

Background

The mechanism by which high-frequency repetitive transcranial magnetic stimulation (HF-rTMS) improves swallowing function by regulating intestinal flora remains unexplored. We aimed to evaluate this using fecal metabolomics and 16S rRNA sequencing.

Methods

A Post-stroke dysphagia (PSD) rat model was established by middle cerebral artery occlusion. The magnetic stimulation group received HF-rTMS from the 7th day post-operation up to 14th day post-surgery. Swallowing function was assessed using a videofluoroscopic swallowing study (VFSS). Hematoxylin-eosin (H&E) staining was used to assess histopathological changes in the intestinal tissue. Intestinal flora levels were evaluated by sequencing the 16S rRNA V3-V4 region. Metabolite changes within the intestinal flora were evaluated by fecal metabolomics using liquid chromatography-tandem mass spectrometry.

Results

VFSS showed that the bolus area and pharyngeal bolus speed were significantly decreased in PSD rats, while the bolus area increased and pharyngeal transit time decreased after HF-rTMS administration (p < 0.05). In the PSD groups, H&E staining revealed damaged surface epithelial cells and disrupted cryptal glands, whereas HF-rTMS reinforced the integrity of the intestinal epithelial cells. 16S rRNA sequencing indicated that PSD can disturb the intestinal flora and its associated metabolites, whereas HF-rTMS can significantly regulate the composition of the intestinal microflora. Firmicutes and Lactobacillus abundances were lower in the PSD group than in the baseline group at the phylum and genus levels, respectively; however, both increased after HF-rTMS administration. Levels of ceramides (Cer), free fatty acids (FA), phosphatidylethanolamine (PE), triacylglycerol (TAG), and sulfoquinovosyl diacylglycerol were increased in the PSD group. The Cer, FA, and DG levels decreased after HF-rTMS treatment, whereas the TAG levels increased. Peptococcaceae was negatively correlated with Cer, Streptococcus was negatively correlated with DG, and Acutalibacter was positively correlated with FA and Cer. However, these changes were effectively restored by HF-rTMS, resulting in recovery from dysphagia.

Conclusion

These findings suggest a synergistic role for the gut microbiota and fecal metabolites in the development of PSD and the therapeutic mechanisms underlying HF-rTMS.