Article
Chemistry, Physical
Zhicheng Huang, Jinbo Pan, Ziheng Yang, Xingguo Wang, Fulei Chu
Summary: The present study investigates the nonlinear vibration behavior of EVES beams using a FE model. The FE model shows better accuracy in predicting the natural frequency of sandwich beams, with the prediction accuracy of damping related to the thickness of each layer. The results provide important reference values for the design and optimization of viscoelastic sandwich structures.
Article
Acoustics
Jun Wu, Branislav Titurus
Summary: This paper introduces a guided tendon concept in the context of rotating helicopter blades to modify dynamics and enable rotorcraft to operate in a wider range of conditions. By adding spring-damper elements to a rotating Timoshenko beam, damping augmentation in the flapping direction is studied, leading to increased damping ratios and frequencies for beam-dominated modes. The use of spring-damper elements can significantly enhance the damping performance and mitigate resonant vibrations in blade modes insensitive to axial forces.
JOURNAL OF SOUND AND VIBRATION
(2021)
Article
Construction & Building Technology
Zhan Shu, Guoyou Li, Qingfeng Xu, Yubing Leng
Summary: A new type of rotational viscoelastic damper (RVED) was proposed to effectively increase the levels of inherent damping of the steel buckling-restrained braced frame (SBRBF). The proposed RVEDs are installed in lieu of the existing beam-column connections, which requires no additional architectural space. Moreover, different from the buckling-restrained braces, energy dissipation of the RVEDs are immediately activated against all levels of wind-and/or earthquake-induced ex-citations.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Liguo Zhang, Toni Helm, Haicheng Lin, Fengren Fan, Congcong Le, Yan Sun, Anastasios Markou, Claudia Felser
Summary: The study demonstrates that doping with vanadium can effectively modify the band structure in magnetic topological insulators, leading to the enhancement of SdH oscillations and the induction of long-range ferromagnetic order. The angle-dependent SdH oscillations reveal their 2D nature and their connection to topological surface states. This tunability by doping and the coexistence of surface states with ferromagnetism highlight the potential of Sb2-xVxTe3 thin films in energy band engineering for quantum electronics and spintronics design.
ADVANCED MATERIALS
(2021)
Article
Engineering, Mechanical
Ji Woo Yoo, Seong Hoon Seo, Jong Ho Park, Ji Un Lee
Summary: This study presents a verified method for obtaining material properties of a constrained asymmetrical damper, including shear modulus, shear factor, and damping loss factor. The difference of natural frequencies between the test and the simulation using the estimated values is about 2%, showing the accuracy of the estimation method.
INTERNATIONAL JOURNAL OF AUTOMOTIVE TECHNOLOGY
(2021)
Article
Mathematics, Applied
Sakthivel Kumarasamy, Alemdar Hasanov, Anjuna Dileep
Summary: In this study, we analyze the effect of Kelvin-Voigt damping on determining the unknown transverse shear force through given boundary measurements. The inverse problems are transformed into minimization problems for Tikhonov functionals and it is shown that these regularized functionals have unique solutions. By suitable regularity on the admissible class of shear force, we prove that these functionals are Fréchet differentiable and the derivatives are expressed through the solutions of corresponding adjoint problems. Using the Fréchet derivative of the more regularized Tikhonov functionals, remarkable Lipschitz stability estimates for the transverse shear force are obtained.
JOURNAL OF INVERSE AND ILL-POSED PROBLEMS
(2023)
Article
Instruments & Instrumentation
P. Arpaia, G. Azzopardi, F. Blanc, G. Bregliozzi, X. Buffat, L. Coyle, E. Fol, F. Giordano, M. Giovannozzi, T. Pieloni, R. Prevete, S. Redaelli, B. Salvachua, B. Salvant, M. Schenk, M. Solfaroli Camillocci, R. Tomas, G. Valentino, F. F. Van der Veken, J. Wenninger
Summary: Machine learning techniques, widely used in Science and Engineering, have recently shown success in the domain of Accelerator Physics, with efforts being deployed by laboratories worldwide. Institutions like CERN are focusing on applying Machine Learning techniques to research and analysis at the Large Hadron Collider.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
(2021)
Article
Multidisciplinary Sciences
Tatyana V. Sukhacheva, Natalia V. Nizyaeva, Maria V. Samsonova, Andrey L. Cherniaev, Artem A. Burov, Mariia V. Iurova, Aleksandr I. Shchegolev, Roman A. Serov, Gennady T. Sukhikh
Summary: Telocytes in patients with atrial fibrillation and atrial fibrillation with isolated atrial amyloidosis exhibit ultrastructural signs of synthetic, proliferative, and phagocytic activity, and show various immunophenotypes. Despite no significant differences in morphology and immunophenotype of telocytes among patients with different forms of atrial fibrillation, CD68-positive cells are more commonly detected in patients with atrial fibrillation and isolated atrial amyloidosis. In aged patients with atrial fibrillation and isolated atrial amyloidosis, remodeling of atrial myocardium may lead to the transformation of telocytes into transitional forms with characteristics of fibroblast-, histiocyte-, and endotheliocyte-like cells.
SCIENTIFIC REPORTS
(2021)
Article
Physics, Multidisciplinary
S. A. Antipov, D. Amorim, N. Biancacci, X. Buffat, E. Metral, N. Mounet, A. Oeftiger, D. Valuch
Summary: Landau damping is crucial for maintaining collective beam stability in particle accelerators, with precise knowledge of its strength being essential for accurate predictions on beam stability in high-energy colliders. An experimental procedure using active transverse feedback has been demonstrated to quantify the strength of Landau damping and the limits of beam stability, with stability diagrams for different Landau octupole strengths being measured at the Large Hadron Collider as a proof-of-principle test. This procedure could potentially provide an accurate way of measuring stability diagrams throughout the machine cycle in the future.
PHYSICAL REVIEW LETTERS
(2021)
Article
Instruments & Instrumentation
D. Quartullo, P. Arpaia, N. Biancacci, F. Giordano, I. Lamas Garcia, A. Mostacci, L. Palumbo, S. Redaelli, B. Salvant, L. Teofili, M. Migliorati
Summary: This article extensively studies the longitudinal impedance and power loss of the crystal-based primary collimator used in the LHC. Electromagnetic simulations are performed on a realistic model that includes all relevant components and their material characteristics, with numerical results compared to dedicated RF measurements on a prototype built for the LHC.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
(2021)
Article
Physics, Nuclear
X. Buffat, E. Metral, E. Gottlob, C. Hogh, A. Oeftiger, T. Pieloni
Summary: A new model using the circulant matrix approach is proposed for describing beam instabilities in synchrotrons, with a focus on the mitigation of transverse mode coupling instability by space charge forces. The model also addresses the presence of transient amplification in configurations with strong space charge forces, even without unstable eigenvalues. Comparisons with experimental results show a reasonable agreement, highlighting the effectiveness of the new model in predicting beam instabilities.
PHYSICAL REVIEW ACCELERATORS AND BEAMS
(2021)
Editorial Material
Physics, Nuclear
N. Biancacci, E. Metral, M. Migliorati
PHYSICAL REVIEW ACCELERATORS AND BEAMS
(2021)
Article
Cell Biology
Tatyana V. Sukhacheva, Roman A. Serov, Natalia V. Nizyaeva, Artem A. Burov, Stanislav V. Pavlovich, Yulia L. Podurovskaya, Maria V. Samsonova, Andrey L. Chernyaev, Aleksandr I. Shchegolev, Alexei I. Kim, Leo A. Bockeria, Gennady T. Sukhikh
Summary: Children with tetralogy of Fallot (TF) experience hemodynamic overload and hypoxemia after birth. Comparative analysis showed significant increase in ploidy and morphology of right ventricular cardiomyocytes in these children. Connexin43-containing gap junctions were predominantly distributed diffusely over the cardiomyocytes sarcolemma and redistributed into intercalated discs during cardiomyocyte differentiation. The number of Ki67-positive cardiomyocytes varied greatly and decreased with increased myocytes differentiation. Ultrastructural signs of immaturity and proliferative activity were observed in cardiomyocytes of children with TF. The proportion of interstitial tissue did not differ significantly from the control group. Myocardium in children with TF under six months of age was most sensitive to hypoxemia, resulting in delayed intercalated discs and myofibril assembly, and dystrophic changes in cardiomyocytes. The adaptation to hemodynamic overload and hypoxemia in immature myocardium of TF children involved the acceleration of ontogenetic growth and differentiation of cardiomyocytes, rather than reactivation of their proliferation.
Article
Physics, Nuclear
Adrian Oeftiger, Oliver Boine-Frankenheim, Vera Chetvertkova, Vladimir Kornilov, Dmitrii Rabusov, Stefan Sorge
Summary: This article introduces the use of self-consistent particle tracking tools in the SIS100 synchrotron to identify low-loss regions for light and heavy ion beams under the "space charge limit". By comparing different simulation results, it is demonstrated that faster space charge models can accurately identify low-loss regions, and several countermeasures are proposed to enlarge the low-loss area and further increase the space charge limit.
PHYSICAL REVIEW ACCELERATORS AND BEAMS
(2022)
Article
Instruments & Instrumentation
Dmitrii Rabusov, Adrian Oeftiger, Oliver Boine-Frankenheim
Summary: In this paper, a quantitative framework is developed to characterize the half-integer stop band for realistic, Gaussian-like distributed bunched beams using SIS100 as an example. The results show that, for bunched beams, even a relatively small gradient error can result in a large half-integer stop band width, significantly reducing the achievable maximum beam intensity.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
(2022)
Correction
Physics, Nuclear
N. Biancacci, E. Metral, M. Migliorati
PHYSICAL REVIEW ACCELERATORS AND BEAMS
(2022)
Article
Physics, Nuclear
Conrad Caliari, Adrian Oeftiger, Oliver Boine-Frankenheim
Summary: Magnetic field errors in synchrotrons can be detected and compensated using deep Lie map networks, which link charged particle dynamics with machine learning methodology. This approach enables the construction of an accelerator model that includes multipole components for magnetic field errors, allowing for more precise control over the accelerator's operation.
PHYSICAL REVIEW ACCELERATORS AND BEAMS
(2023)
Article
Biology
Andre Henriques, Nicolas Mounet, Luis Aleixo, Philip Elson, James Devine, Gabriella Azzopardi, Marco Andreini, Markus Rognlien, Nicola Tarocco, Julian Tang
Summary: This paper presents the COVID Airborne Risk Assessment methodology, which assesses the potential exposure to airborne SARS-CoV-2 viruses in indoor settings. It combines virological and immunological factors, as well as physical and mechanical aspects, to provide decision makers and facility managers with a comprehensive evaluation. The study confirms the importance of super-emitters in airborne transmission and highlights the effectiveness of measures such as mask usage and natural ventilation in reducing viral emissions.
Article
Engineering, Electrical & Electronic
Pasquale Arpaia, Gabriella Azzopardi, Frederic Blanc, Xavier Buffat, Loic Coyle, Elena Fol, Francesco Giordano, Massimo Giovannozzi, Tatiana Pieloni, Roberto Prevete, Stefano Redaelli, Belen Salvachua, Benoit Salvant, Michael Schenk, Matteo Solfaroli Camillocci, Rogelio Tomas, Gianluca Valentino, Frederik Florentinus Van der Veken, Joerg Wenninger
IEEE INSTRUMENTATION & MEASUREMENT MAGAZINE
(2021)
Article
Medicine, Research & Experimental
A. Burov, T. A. Abramov, N. S. Kostritca, D. S. Korotkov, G. Danilov, Y. Strunina, I. A. Savin
Summary: This case series demonstrates that combined blood purification therapy may have a role in treating septic shock patients with primary brain injury, leading to clinical improvement, decreased multiple organ failure severity, and lower levels of blood lactate, PCT and IL-6.
EUROPEAN JOURNAL OF MEDICAL RESEARCH
(2021)
