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Results 411-420 of 2278 (Search time: 0.005 seconds).
    • Clinical features and markers to identify pulmonary lesions caused by infection or vasculitis in AAV patients
    Authors: Yujuan, Wang; Zhuan, Qu; Wei, Liang;  Advisor: -;  Co-Author: - (2023)

    Pulmonary lesion is frequently seen in ANCA-associated vasculitis (AAV) patients primarily due to AAV lung involvement or infection, which are hard to differentiate due to their high similarity in clinical manifestations. We aimed to analyze the clinical features of pulmonary lesions consequent to AAV involvement or infection in AAV patients and further identify the markers for differential diagnosis.
    • Correction High arterial oxygen levels and supplemental oxygen administration in traumatic brain injury insights from CENTER-TBI and OzENTER-TBI
    Authors: Emanuele, Rezoagli; Matteo, Petrosino; Paola, Rebora;  Advisor: -;  Co-Author: - (2023)

    Figure 1 contained some incorrect colors of the representative country flags that are now corrected. Figure 3 was updated: we represented the interaction between PaO2max and FiO2max with mortality in both panels. Consequently, the Figure 3 caption was edited as follows: “Fig. 3. Tensor cubic spline for the interaction between PaO2max and FiO2max with GFAP. In panel A on the left, we represented the tensor cubic spline with 4 degrees of freedom each, used for the interaction between PaO2max and GFAP in the multivariable logistic model with 6-month mortality as the outcome (i.e. model 2 of Table 2)
    • Characterizations and Directed Path-Width of Sequence Digraphs
    Authors: Frank, Gurski; Carolin, Rehs; Jochen, Rethmann;  Advisor: -;  Co-Author: - (2023)

    Computing the directed path-width of a directed graph is an NP-hard problem. Even for digraphs of maximum semi-degree 3 the problem remains hard. We propose a decomposition of an input digraph G = (V,A) by a number k of sequences with entries from V, such that (u,v) ∈ A if and only if in one of the sequences there is an occurrence of u appearing before an occurrence of v. We present several graph theoretical properties of these digraphs. Among these we give forbidden subdigraphs of digraphs which can be defined by k = 1 sequence, which is a subclass of semicomplete digraphs.
    • A novel accelerated extragradient algorithm to solve pseudomonotone variational inequalities
    Authors: Supansa, Noinakorn; Nopparat, Wairojjana; Nuttapol, Pakkaranang;  Advisor: -;  Co-Author: - (2022)

    In this paper, we propose a new inertial iterative method to solve classical variational inequalities with pseudomonotone and Lipschitz continuous operators in the setting of a real Hilbert space. The proposed iterative scheme is basically analogous to the extragradient method used to solve the problems of variational inequalities in real Hilbert spaces. The strong convergence of the proposed algorithm is set up with the prior knowledge of Lipschitz’s constant of an operator. Finally, several computational experiments are listed to show the applicability and efficiency of the proposed algorithm.
    • Singular Anisotropic Problems with Competition Phenomena
    Authors: Nikolaos S., Papageorgiou; Calogero, Vetro; Francesca, Vetro;  Advisor: -;  Co-Author: - (2023)

    We consider a Dirichlet problem driven by the anisotropic (p(z), q(z))-Laplacian, with a parametric reaction exhibiting the combined effects of singular and concave-convex nonlinearities. The superlinear term may change sign. Using variational tools together with truncation and comparison techniques, we prove a global (for the parameter λ>0 ) existence and multiplicity theorem (a bifurcation-type theorem).
    • General one-dimensional model of the time-fractional diffusion-wave equation in various geometries
    Authors: Ján, Terpák;  Advisor: -;  Co-Author: - (2023)

    This paper deals with the analysis of the time-fractional diffusion-wave equation as one-dimensional problem in a large plane wall, long cylinder, and sphere. The result of the analysis is the proposal of one general mathematical model that describes various geometries and different processes. Finite difference method for solving the time-fractional diffusion-wave equation using Grünwald-Letnikov definition for homogeneous or inhomogeneous material and for homogeneous or inhomogeneous boundary conditions is described. Dirichlet, Neumann and Robin boundary conditions are considered. Implementation of numerical methods for explicit, implicit, and Crank-Nicolson scheme were realised in MATLAB. Finally, illustrative examples of simulations using the developed toolbox are presented.