Buscar recursos académicos

Cancer cells have an altered metabolism that increases acid production driving to an extracellular pH significantly lower than normal. This leads to normal cell death, and extracellular matrix degradation allowing the fo...

Living organisms anticipate the seasons by tracking the proportion of light and darkness hours within a day—photoperiod. The limits of photoperiod measurement can be investigated in the subterranean rodents tuco-tucos ...

Background: Cancer stem cells are important for the development of many solid tumors. These cells receive promoting and inhibitory signals that depend on the nature of their environment (their niche) and determine cell d...

Abstract In this study, a new three-parameter Lomax distribution is proposed using the beta transformation technique. The new distribution is named Beta Transformed Lomax distribution. Some mathematical properties of the...

In his unfinished Ad harmonicon coeleste, François Viète (1540–1603) approaches astronomical models in a purely mathematical way, analyzing the equations involved in the geometrical models and suggesting new geometri...

This study investigates a fractional partial differential equation in the field of mathematical biology. The Bernoulli (G'⁄G)-expansion method is applied to solve this class of fractional-order nonlinear differential e...

The purpose of this study is to examine the effect of Index Card Match (ICM) learning model with Problem Posing approach and assisted by MATLAB software to improve problem-solving abilities both overall and reviewed from...

Improving students’ mathematical wellbeing is important because it supports their positive feelings toward mathematics and contributes to better learning outcomes. However, limited research has explored which factors i...

Automated scoring of mathematical solutions is challenging due to the diversity of solution strategies and the need to assess both correctness and reasoning. We present SymbAlign++, a hybrid framework that combines symbo...

Mathematics and computer science play a pivotal role in modern biology. Dynamical models based on differential equations are particularly adapted to describe dynamic behaviors of many biological processes. However, tradi...

Background: The transition from arithmetic to algebra remains a persistent challenge in early mathematics education. While structural awareness is widely recognised as foundational to this shift, the developmental mecha...

Este artigo apresenta, dentro de uma perspectiva histórica, algumas ideias sobre a aplicação de ferramentas matemáticas no estudo de problemas relacionados à biologia. Usando a Teoria dos Sistemas Dinâmicos, alguns...

The Pearl River Basin, a pivotal river system in Southern China, traverses ecologically fragile zones including the Yunnan-Guizhou Plateau, port trading zones of the Beibu Gulf in Guangxi, and urban economic zones of the...

Precipitation generators are statistical models used to produce synthetic sequences of (multisite) precipitation for hydrological applications such as flood risk assessment and water resource management. Among these, app...

Emerging marine infectious diseases pose a substantial threat to marine ecosystems and the conservation of their biodiversity. Compartmental models of epidemic transmission in marine sessile organisms, available only rec...

In this paper we analyze the existence of stable matchings in a two- sided large market in which workers are assigned to firms. The market has a continuum of workers while the set of firms is countably infinite. We show ...

Abstract Magnetically coupled rodless cylinders are widely used in the coordinate positioning of mechanical arms, electrostatic paintings, and other industrial applications. However, they exhibit strong nonlinear charact...

Mathematical representation is an idea interpretation form of solving mathematical problems. The process of mathematical representation is essential to pay attention to, especially in carrying out transformations between...

The failure of immunotherapies in cancer patients is being widely studied due to the complexitiespresent in the tumor microenvironment (TME), where regulatory T cells (Treg) appear toactively participate in providing an ...

The article presents a brief description of the results of a study of various aspects of the economic security of business entities in the petrochemical complex. The study is aimed at solving the current scientific and p...

The purpose of this study was to describe students' mathematical literacy in solving PISA problems with Adversity Quotient (AQ) type of Climber, Camper, and Quitter. This type of research is a qualitative descriptive stu...

The ability of the mathematical representation is the ability to create a model of a problem into a new form of verbal, text, tables, or graphs. The research is a qualitative descriptive study aimed to systematically des...

In this study, a new methodology is developed to optimize cold chain distribution routes of agricultural products with a view to reducing the costs of distribution. It develops a mathematical model that considers multipl...

En este trabajo se desarrolla una estrategia de control no lineal para un convertidor electrónico de potencia DC-DC reductor (convertidor buck) que alimenta una carga de potencia constante. Debido a la no linealidad que...