Kokol-Bukovšek, Damjana Mojškerc, Blaž Stopar, Nik

We answer a 15-year-old open question about the exact upper bound for bivariate copulas with a given diagonal section by giving an explicit formula for this bound. As an application, we determine the maximal asymmetry of bivariate copulas with a given diagonal section and construct a copula that attains it. We derive a formula for the maximal asymm...

Mishra, Princy Singh, O P Katiyar, A K
Published in
Physica Scripta

The direct conversion of solar energy into electrical energy is primarily dependent on the photovoltaic systems. However, in the last few decades, researchers have shown interest to work on the thermoelectric modules for direct conversion of solar thermal energy into electrical energy based on the Seebeck effect. This research paper provides a comp...

Shah, Kamal Abdeljawad, Thabet
Published in
Physica Scripta

This research work is devoted to undertake a mathematical model for emissions of carbon dioxide (CO 2) from energy sector using the concept of fractals-fractional differential (FFD) operator. Here, it should be kept in mind that as the population is expanding, so the need of energy increasing day by day. Burning fossil fuels accounts for a sizable ...

Taques, Bárbara O M Gamba, Humberto R Menegaz, Danusa Silva, Fátima R M B Suzuki, Daniela O H
Published in
Biomedical Physics & Engineering Express

Sertoli cells are essential for the male reproduction system as they provide morphological support and nutrients for germ cells to guarantee ongoing spermatogenesis. The aim of this work was to predict the electrical properties at the plasma membrane that trigger Sertoli cell rapid responses by involving ionic channels. The rapid responses of Serto...

Kambeu Youmbi, Aurelien Touzeau, Suzanne Grognard, Frédéric Tsanou, Berge

One of the biggest challenges for the farmer is to increase the incomes generated by his farm. This is not always easy because of pests and the scarcity of nutrients in the soil. In this work, we model, analyze and simulate a self-financing nonlinear mathematical model for cabbage crops. The model takes into account the young biomass, the adult bio...

Carlsson, Marcus Wittsten, Jens Söderberg-Nauclér, Cecilia

The unfolding of the COVID-19 pandemic has been very difficult to predict using mathematical models for infectious diseases. While it has been demonstrated that variations in susceptibility have a damping effect on key quantities such as the incidence peak, the herd-immunity threshold and the final size of the pandemic, this complex phenomenon is a...

Georgieva-Tsaneva, Galya
Published in
Sensors (Basel, Switzerland)

The paper presents an interactive cardio system that can be used to improve healthcare. The proposed system receives, processes, and analyzes cardio data using an Internet-based software platform. The system enables the acquisition of biomedical data using various means of recording cardiac signals located in remote locations around the world. The ...

Klement, Erich Peter Kokol-Bukovšek, Damjana Omladič, Matjaž Saminger, Susanne Stopar, Nik

Copulas are functions that link an n-dimensional distribution function with its one-dimensional margins. In this contribution we show how n-variate copulas with given values at two arbitrary points can be constructed. Thereby, we also answer a so far open question whether lower and upper bounds for n-variate copulas with given value at a single arb...

ilaria spassiani, giovanni sebastiani;

In this paper, we deal with the problem of estimating the reproduction number Rt during an epidemic, as it represents one of the most used indicators to study and control this phenomenon. In particular, we focus on two issues. First, to estimate Rt, we consider the use of positive test case data as an alternative to the first symptoms data, which a...

Madubueze, Chinwendu E. Chazuka, Z. Onwubuya, I. O. Fatmawati, F. Chukwu, C. W.
Published in
Frontiers in Applied Mathematics and Statistics

Schistosomiasis is a neglected disease affecting almost every region of the world, with its endemicity mainly experience in sub-Saharan Africa. It remains difficult to eradicate due to heterogeneity associated with its transmission mode. A mathematical model of Schistosomiasis integrating heterogeneous host transmission pathways is thus formulated ...