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Acrobatics at the insect scale: A durable, precise, and agile micro-aerial robot.
Sci Robot
January 2025
Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA.
Aerial insects are exceptionally agile and precise owing to their small size and fast neuromotor control. They perform impressive acrobatic maneuvers when evading predators, recovering from wind gust, or landing on moving objects. Flapping-wing propulsion is advantageous for flight agility because it can generate large changes in instantaneous forces and torques.
View Article and Find Full Text PDFH2O trimer: Rigorous 12D quantum calculations of intermolecular vibrational states, tunneling splittings, and low-frequency spectrum.
J Chem Phys
January 2025
Department of Chemistry, New York University, New York, New York 10003, USA.
The water trimer, as the smallest water cluster in which the three-body interactions can manifest, is arguably the most important hydrogen-bonded trimer. Accurate, fully coupled quantum treatment of its excited intermolecular vibrations has long been an elusive goal. Here, we present the methodology that for the first time allows rigorous twelve-dimensional (12D) quantum calculation of the intermolecular vibration-tunneling eigenstates of the water trimer, with the monomers treated as rigid.
View Article and Find Full Text PDFIsolated fallopian tube torsion with hydrosalpinx in a 14 year old girl: A case report.
Int J Surg Case Rep
January 2025
Ranga Hospital, Coimbatore, India.
Introduction: Isolated fallopian tube torsion (IFTT) is an exceedingly rare but serious cause of acute abdominal pain, especially in pediatric patients, with a reported prevalence of 1 in 1.5 million women. It occurs when the fallopian tube twists around its own axis, leading to venous and lymphatic obstruction, ischemia, and potential necrosis, without involving the ipsilateral ovary.
View Article and Find Full Text PDFDecoding the Torsional Dynamics of Main-Chain Atoms Within CαNN Motif Facilitating Specific Anion Recognition.
Proteins
January 2025
Department of Biotechnology, Maulana Abul Kalam Azad University of Technology, Haringhata, India.
The structural plasticity of proteins at the molecular level is largely dictated by backbone torsion angles, which play a critical role in ligand recognition and binding. To establish the anion-induced cooperative arrangement of the main-chain (mc) torsion, herein, we analyzed a set of naturally occurring CαNN motifs as "static models" for their anion-binding competence through docking and molecular dynamics simulations and decoded its torsion angle influenced mc-driven anion recognition potential. By comparing a pool of 20 distinct sets of CαNN motif with identical sequences in their "anion bound/present, aP" and "anion free/absent, aA" versions, we could discern that there exists a positive correlation between the "difference of anion residence time (ΔR)" and "difference among the main-chain torsion angle" of the aP and aA population.
View Article and Find Full Text PDFComparison of the Finite Element Method and Rigid Finite Element Method During Dynamic Calculations of Steel-Concrete Composite Beams Based on Experimental Results.
Materials (Basel)
December 2024
Faculty of Civil and Environmental Engineering, West Pomeranian University of Technology in Szczecin, Al. Piastów 17, 70-310 Szczecin, Poland.
Dynamic analysis of structures is a key challenge in structural engineering, especially in choosing effective and accurate numerical methods. Steel-concrete composite structures, commonly used in bridges and floors, require calculations of dynamic parameters to ensure safety and comfort. Few studies compare the effectiveness of the finite element method (FEM) and the rigid finite element method (RFEM) in the dynamic analysis of such structures.
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