Ascents in balloons were first performed in Buenos Aires in 1855, and this activity was later regulated through the "Argentine Air Club," founded in 1908, whose Vice President, Jorge Newbery, subsequently became officially known as the "Founder of Argentine Aeronautics." Airplanes appeared and the first pilots' licenses were granted on June 17, 1910. Medical advice was given for such feats as crossing The Andes Cordillera in a balloon in 1915. Medical requirements for flying activities led to the creation of the Psychophysical Fitness Center in 1922, the first of its kind in Argentina and South America. There, selection and periodical check-ups were performed according to medical standards prepared by Agesilao Milano, M.D., the Founder of Aviation Medicine in Argentina. Sanitary aviation began in 1911, and was formally organized in 1940. The first paper in aviation medicine was published in 1924. Teaching and research in aviation medicine started in 1933, and continued after the creation of the National Institute of Aviation Medicine in 1945, taking as its basic objective the physical fitness qualification for all flying activities. The Institute has been recognized as a University Establishment and rules Argentine national policy in aviation medicine.
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Commun Biol
January 2025
Department of Neurology, Peking University First Hospital, Beijing, People's Republic of China.
Persistent Postural-Perceptual Dizziness (PPPD) is a common cause of chronic vestibular syndrome. Although previous studies have identified central abnormalities in PPPD, the specific neural circuits and the alterations in brain network topological properties, and their association with dizziness and postural instability in PPPD remain unclear. This study includes 30 PPPD patients and 30 healthy controls.
View Article and Find Full Text PDFLife (Basel)
January 2025
University Clinical Centre named after Prof. K. Gibiński, Medical University of Silesia, 40-514 Katowice, Poland.
Background: This study aimed to evaluate mydriasis stability during cataract surgery in patients with systemic comorbidities such as diabetes mellitus (DM) and pseudoexfoliation syndrome (PXF) after a standardised combination of intracameral mydriatics and anaesthetic (SCIMA). Stable mydriasis is crucial for safe and effective phacoemulsification.
Methods: Patients were included if they achieved pupil dilation ≥6.
Materials (Basel)
January 2025
Industrial Engineering and Robotics Faculty, Politehnica University of Bucharest, Spl. Independentei 303, 060042 Bucharest, Romania.
Additive manufacturing technology, also known as 3D printing, has emerged as a viable alternative in modern manufacturing processes. Unlike traditional manufacturing methods, which often involve complex mechanical operations that can lead to errors and inconsistencies in the final product, additive technology offers a new approach that enables precise layer-by-layer production with improved geometric accuracy, reduced material consumption and increased design flexibility. Geometrical accuracy is a critical issue in industries such as aerospace, automotive, medicine and consumer goods, hence the importance of the following question: can the dimensional optimisation of 3D FDM-manufactured parts be a solution for correct design? This paper presents a complex study of model parts printed from four common polymers used in fused deposition modelling (FDM) additive technology, namely ABS (acrylonitrile-butadiene-styrene), PLA (polylactic acid), HIPS (high-impact polystyrene) and PETG (polyethylene terephthalate glycol).
View Article and Find Full Text PDFInt J Mol Sci
January 2025
Department of Otorhinolaryngology-Head and Neck Surgery, College of Medicine, Inha University, Incheon 22332, Republic of Korea.
Gravitational changes have been shown to cause significant abnormalities in various body systems, including the cardiovascular, immune, vestibular, and musculoskeletal systems. While numerous studies have examined the response of the vestibular system to gravitational stimulation, research on functional changes in the peripheral inner ear remains limited. The inner ear comprises two closely related structures: the vestibule and cochlea.
View Article and Find Full Text PDFMicromachines (Basel)
December 2024
Henan Key Lab of Intelligent Manufacturing of Mechanical Equipment, Zhengzhou University of Light Industry, Zhengzhou 450002, China.
In recent years, metal nanomaterials and nanoproducts have been developed intensively, and they are now widely applied across various sectors, including energy, aerospace, agriculture, industry, and biomedicine. However, nanomaterials have been identified as potentially toxic, with the toxicity of metal nanoparticles posing significant risks to both human health and the environment. Therefore, the toxicological risk assessment of metal nanomaterials is essential to identify and mitigate potential adverse effects.
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