Results 21 to 30 of about 1,830,065 (298)

On the Quadratization of the Integrals for the Many-Body Problem

Mathematics, 2021
A new approach to the construction of difference schemes of any order for the many-body problem that preserves all its algebraic integrals is proposed herein.
Yu Ying, Ali Baddour, Vladimir P. Gerdt, Mikhail Malykh, Leonid Sevastianov   +4 more
doaj   +1 more source

Bayesian penalized model for classification and selection of functional predictors using longitudinal MRI data from ADNI

Statistical Theory and Related Fields, 2022
The main goal of this paper is to employ longitudinal trajectories in a significant number of sub-regional brain volumetric MRI data as statistical predictors for Alzheimer's disease (AD) classification. We use logistic regression in a Bayesian framework
Asish Banik, Taps Maiti, Andrew Bender
doaj   +1 more source

Forecasting Agricultural Financial Weather Risk Using PCA and SSA in an Index Insurance Model in Low-Income Economies

Applied Sciences, 2023
This article presents a novel methodology to assess the financial risk to crops in highly weather-volatile regions. We use data-driven methodologies that use singular value decomposition techniques in a low-income economy.
Adriana L. Abrego-Perez, Natalia Pacheco-Carvajal, Maria C. Diaz-Jimenez   +2 more
doaj   +1 more source

Do Ṣukūk and Islamic indexes act as safe refuge to conventional stock markets? Evidence from Markov-switching CAPM approach [PDF]

Islamic Economic Studies, 2022
Purpose – The objective of this paper is twofold. First, to study the safe-haven characteristic of the Islamic stock indexes and Ṣukūk during the crises time. Second, to evaluate this property in the last pandemic.
Slah Bahloul, Fatma Mathlouthi
doaj   +1 more source

Propagation Model for Ground-to-Aircraft Communications in the Terahertz Band with Cloud Impairments

Energies, 2022
By operating over a large bandwidth, the terahertz (THz) frequency band (0.3–3 THz) promises to deliver extremely high data rates. While the use of this band in cellular communications systems is not expected to happen within the next decade, various ...
Vladimir Doborshchuk, Vyacheslav Begishev, Konstantin Samouylov   +2 more
doaj   +1 more source

On Reliability Function of a k-out-of-n System with Decreasing Residual Lifetime of Surviving Components after Their Failures

Mathematics, 2022
We consider the reliability function of a k-out-of-n system under conditions that failures of its components lead to an increase in the load on the remaining ones and, consequently, to a change in their residual lifetimes.
Vladimir Rykov, Nika Ivanova, Dmitry Kozyrev, Tatyana Milovanova   +3 more
doaj   +1 more source

Synthesis of the Thickness Profile of the Waveguide Layer of the Thin Film Generalized Waveguide Luneburg Lens

EPJ Web of Conferences, 2016
A local variation in the thickness of the waveguide layer of integrated optics waveguide causes a local decrease of phase velocity, and hence bending of rays and of the wave front.
Ayryan E.A., Dashitsyrenov G.D., Lovetskiy K.P., Sevastianov A.L.   +3 more
doaj   +1 more source

Modeling and Analyzing Preemption-Based Service Prioritization in 5G Networks Slicing Framework

Future Internet, 2022
The Network Slicing (NS) technology, recognized as one of the key enabling features of Fifth Generation (5G) wireless systems, provides very flexible ways to efficiently accommodate common physical infrastructures, e.g., Base Station (BS), multiple ...
Yves Adou, Ekaterina Markova, Yuliya Gaidamaka   +2 more
doaj   +1 more source

A Quality Improvement Initiative to Standardize Pneumocystis jirovecii Pneumonia Prophylaxis in Pediatric Patients With Solid Tumors

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background Pediatric patients with extracranial solid tumors (ST) receiving chemotherapy are at an increased risk for Pneumocystis jirovecii pneumonia (PJP). However, evidence guiding prophylaxis practices in this population is limited. A PJP‐related fatality at our institution highlighted inconsistent prescribing approaches and concerns about
Kriti Kumar, Denise M. Connolly, Ellen Kellington, Elyse Zelunka, Karla Kerrigan, Furqan Shaikh, Paul C. Nathan, Meredith S. Irwin, Sarah Cohen‐Gogo   +8 more
wiley   +1 more source

An Analysis of Implied Volatility, Sensitivity, and Calibration of the Kennedy Model

Mathematics
The Kennedy model provides a flexible and mathematically consistent framework for modeling the term structure of interest rates, leveraging Gaussian random fields to capture the dynamics of forward rates.
Dalma Tóth-Lakits, Miklós Arató, András Ványolos   +2 more
doaj   +1 more source