Physical Sciences and Engineering

Obstructive sleep apnea-hypopnea syndrome (OSAHS) is an increasingly significant health concern due to its widespread occurrence, heightened risk factors, and significant mortality rates. To address this issue, researchers have focused on utilizing the blood oxygen saturation (SpO2) signal to analyze the occurrences of apnea or hypoventilation episodes during sleep, resulting in the development of the apnea-hypopnea index (AHI). In order to extract relevant information from the SpO2 signals, 35 Time Domain characteristics have been identified and studied.

Renewable energy use is still a viable option for people when it comes to protecting the environment and promoting sustainable development. This is the reason why some people in the commune of N’Zérékoré have opted for the use of solar panels as sources of energy. Although the use of these solar panels is considered an alternative solution to energy problems, it is clear that the performance of these solar panels after installation is negatively influenced by meteorological parameters such as temperature, humidity and precipitation.

Teaching is a noble profession and our country has seen renowned teachers in various fields. Teaching Profession has evolved over the years and the demands of the profession has evolved over the years and the demands of the profession varies at different levels as for schools, colleges, professional colleges etc., Different schools promise global teaching with local knowledge etc., not being able to draw the line in the dynamic education scenario. NEP calls for nationalization of curriculum, while the states call for regionalization.

Entanglement is a key resource in the field of quantum computation and quantum technologies. One has to deal with measurement error-mitigation in the present day Noisy Intermediate-scale Quantum (NISQ) processors so as to witness advantages offered by entanglement. In this paper we implement Bell state measurements in IBM open access 7-qubit quantum processor ibmq_nairobi and mitigate errors incurred. We evaluate fidelities of all four Bell states (theoretical) with the ones retrieved experimentally before and after measurement error-mitigation.

The generalized evolution of the level of road traffic in number and characteristics, associated with overloads, today leads to an underestimate of the loads due to traffic when designing road structures. Consequently, this under-evaluation of the aggressiveness of traffic is accompanied by early appearances of damage to the roads and at the same time causing enormous budgetary expenditure on maintenance and rehabilitation.

In this work, we are interested in the mathematical analysis of a model of a bioreactor based on the results of a model already implemented ADM1. It is an observability analysis and estimation scheme for specific growth rates for an anaerobic digestion process of cow dung. A 1- stage model of 3 dynamic states is assumed describing all anaerobic digestion with a different population of microorganisms, and the evaluation of biogas production (methane + carbon dioxide).

In this paper we define a new type of number called the Highly Harshad number, that relates the sum of digits and prime divisors of a positive integer, then analyse some of its properties, its relation with prime numbers, and prove its infiniteness.

In coming years the world demand of energy supply will increase, and reduction of carbon dioxide emission will be the priority for meeting of the projected feature electricity. India was reported to be the world's second largest country with a total population of 1.35262 billion and 2718.7 million GDP in the year 2017. Over decades, there is increase demand of energy in India because of the exponential growth in the population.

In recent years, global energy systems have undergone a transition, with their energy matrices gradually shifting towards more renewable and cleaner sources. Among the various alternative energy sources, biofuels have become the subject of extensive academic research and scientific studies. The aim of this paper is to utilize jackfruit seeds, an agro-industrial residue, to obtain biofuel using the transesterification method. The oil was extracted from the seeds using the Soxhlet Extraction method, with hexane as the solvent.

Conservation and non-conservation are two aspects of extensive quantities. Current physics textbooks deal with conservation and non-conservation in some ways that, unfortunately, lead to misunderstandings of extensive quantities. In this paper, we will discuss and explain how this is inappropriate or obsolete and we will make some suggestions for teaching conservation and non-conservation of extensive quantities and finally give a clear and simple formulation for each extensive quantity.