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Identification method of wheel-rail two-point contact state in switch area.
Sci Rep
January 2025
School of Mechanical Engineering, Southwest Jiaotong University, Chengdu, 610031, China.
Two-point contact is one of the fundamental problems of wheel-rail contact in switch area. The contact state and the distribution of forces are complex and essential points in wheel-rail relationship. Given the problem that the current dynamic wheel-rail contact state is challenging to detect, a theory to detect the two-point contact state of the wheel-rail in switch area using a discrete gauge column was presented and proved in the finite element model.
View Article and Find Full Text PDFA Retrospective Study of Pediatric Allergic Contact Dermatitis from 2017-2022.
Dermatol Ther (Heidelb)
January 2025
Burkhart Pediatric and Adolescent Dermatology, Cary, NC, USA.
Objectives: Allergic contact dermatitis occurs frequently in children. The proportion of children of color in the US is increasing, and racial and ethnic minority representation is important in pediatric allergic contact dermatitis research. The objectives of our study were to identify differences in age, sex, race and ethnicity among pediatric patch tests obtained from 2017 to 2022.
View Article and Find Full Text PDFPulmonary Morbidity in Congenital Diaphragmatic Hernia Survivors Treated at a Non-ECMO Center From 1998 to 2015: A Cross-Sectional Study.
Pediatr Pulmonol
January 2025
Department of Clinical Research, Faculty of Health sciences, University of Southern Denmark, Odense, Denmark.
Introduction: A main feature of CDH is lung hypoplasia and the related presentation of pulmonary hypertension and cardiac dysfunction. Multiple factors influence pulmonary status after CDH: degree of hypoplasia, ventilator-induced injury, altered growth and development of pulmonary structures, reduced diaphragm function and chest wall abnormalities. The evolution of pulmonary sequela in this population is still unclear.
View Article and Find Full Text PDFHyperspectral images (HSI) have been extensively applied in a multitude of domains, due to their combined spatial and spectral characteristics along with a wealth of spectral bands. The ingenious combination of spatial and spectral information in HSI classification has remained a central research area for an extended period. In the classification process, it is essential to choose an expanded neighborhood window for learning.
View Article and Find Full Text PDFReport of a Rare Case of Acute Abdominal Pain Post-partum: Spontaneous Ureteral Rupture.
Cureus
December 2024
Radiology, West Suffolk NHS Foundation Trust, Bury St Edmunds, GBR.
Spontaneous ureteral rupture is a rare cause of acute abdominal pain, particularly unusual during pregnancy or the post-partum period. While pregnancy-related changes like ureteral compression and dilation may play a role, no definitive mechanisms have been established. Clinicians should suspect ureteric injury in post-partum patients with free pelvic fluid.
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