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In this paper, we investigate some qualitative properties of a class of nonlinear singular systems with multiple constant delays. By using the Lyapunov-Krasovskii functional (LKF) method and integral inequalities, we obtain some new sufficient conditions which guarantee that the considered systems are regular, impulse-free and exponentially stable. Two numerical examples are provided to illustrate the application of the obtained results using MATLAB software. By this paper, we extend and improve some results in the literature. [ABSTRACT FROM AUTHOR]

This paper deals with the study of asymptotic stability of zero solution of a kind of delay singular system. Based on the delayed-decomposition approach, two new results are obtained on the asymptotic stability of the considered system by using some inequalities and Lyapunov-Krasovski functionals (LKFs). Two examples with their numerical simulations are provided to illustrate effectiveness of the pro-posed method by MATLAB software. [ABSTRACT FROM AUTHOR]

This work furnishes some Hadamard-Hermite (HH) type inequalities for interval-valued function by using an efficient partial order CW on the space of all compact intervals. It has been shown that the interval-valued HH's inequality proved herein, applied to already determined inequalities for real-valued functions. Specifically, this paper unifies and generalizes HH inequalities in the literature. We illustrate results with numerical examples. [ABSTRACT FROM AUTHOR]

Introduction: Increasing migration, due to wars, is one of the environmental factors in the etiology of multiple sclerosis. This study aims to compare demographic and clinical features of immigrant and local MS patients, as well as relapses during pregnancy and postpartum in female patients., Method: Immigrant (Group 1) and local (Group 2) MS patients were evaluated between January 2019 - September 2020 retrospectively. Below-mentioned data of two groups were recorded and compared: i) demographic data, ii) cerebrospinal fluid (CSF) and magnetic resonance imaging (MRI) findings, iii) MS subtypes, iv) expanded disability status scores (EDSS), v) the time between first two relapses, vi) comorbidities, vii) treatment, viii) age of migration and country of origin, ix) pregnancy, x) relapse during pregnancy, xi) birth number, xii) breastfeeding, xiii) postpartum relapses., Results: Both of the groups were composed of 34 MS patients (in total n=68). Gender distribution, mean age, MS subtypes, the time between first two relapses, disease duration, EDSS, CSF findings and comorbidities were similar between groups. Symptom of onset was predominantly sensory in both groups. Local patients had more cervical lesions and higher lesion load (p=0.003, p=0.006). 20.6% of migrant MS patients were untreated, all local patients were on treatment. Rates of injection and infusion therapies were similar, the rate of receiving oral therapy was higher in the second group. Clinical features and fertility status of female patients were similar., Conclusion: According to the study no differences were preseentpresent between immigrant and local MS patients except for MRI lesion load and treatment parameters. The language barrier and irregular follow-ups were the major problems in treatment management., Competing Interests: Conflict of Interest: The authors declared that there is no conflict of interest., (Copyright: © 2023 Turkish Neuropsychiatric Society.)

In this paper, certain system of linear homogeneous differential equations of second-order is considered. By using integral inequalities, some new criteria for bounded and [Formula: see text]-solutions, upper bounds for values of improper integrals of the solutions and their derivatives are established to the considered system. The obtained results in this paper are considered as extension to the results obtained by Kroopnick (2014) [1]. An example is given to illustrate the obtained results.

Objectives: The purpose of this study was to assess the suitability of the rabbit knee as a small joint model for the human interphalangeal and metacarphophalangeal joints of the hand., Methods: The proximal joint surface areas of 47 middle phalanges, the proximal and distal joint surface areas of 90 proximal phalanges, and the distal joint surface areas of 42 metacarpals of various human cadavers were calculated and compared with the distal femoral and proximal tibial joint surface areas of 20 knee of 10 New Zealand white rabbits by a photogrammetric method., Results: The mean joint surface area of the rabbit proximal tibia was larger than the proximal joint surface area of the middle phalanx, the distal joint surface area of the proximal phalanx, the proximal joint surface area of the proximal phalanx, and the distal joint surface area of the metacarpal. The mean joint surface area of the rabbit distal femur was larger than that of the middle phalanx, but similar to the proximal joint surface area of the proximal phalanx, and that of the distal metacarpal and distal proximal phalanx., Conclusion: The rabbit knee is not suitable model for the human interphalangeal and metacarphophalangeal joints of the hand. There is still a lack of an appropriate animal model for the small joints of the hand.