Subjects -> PHYSICS (Total: 857 journals)     - ELECTRICITY AND MAGNETISM (10 journals)    - MECHANICS (22 journals)    - NUCLEAR PHYSICS (53 journals)    - OPTICS (92 journals)    - PHYSICS (625 journals)    - SOUND (25 journals)    - THERMODYNAMICS (30 journals) NUCLEAR PHYSICS (53 journals)
 Showing 1 - 50 of 50 Journals sorted alphabetically Advances in Optics and Photonics       (Followers: 18) Annual Review of Nuclear and Particle Science       (Followers: 1) APL Photonics Atomic Data and Nuclear Data Tables EPJ A - Hadrons and Nuclei EPJ B - Condensed Matter and Complex Systems       (Followers: 1) EPJ E - Soft Matter and Biological Physics       (Followers: 3) EPJ Nuclear Sciences & Technologies       (Followers: 3) EPL Europhysics Letters       (Followers: 8) Fusion Science and Technology       (Followers: 4) IEEE Nanotechnology Express       (Followers: 18) International Journal of Quantum Chemistry       (Followers: 5) Journal of Nanomedicine & Nanotechnology       (Followers: 2) Journal of Nuclear and Particle Physics       (Followers: 14) Journal of Nuclear Materials       (Followers: 12) Journal of Physics G : Nuclear and Particle Physics       (Followers: 16) Journal of Quantum Chemistry       (Followers: 1) Kerntechnik Nano Energy       (Followers: 11) NanoImpact Nanotechnology Development       (Followers: 21) Nanotechnology, Science and Applications       (Followers: 7) Nuclear and Particle Physics Proceedings       (Followers: 3) Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment       (Followers: 18) Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms       (Followers: 17) Nuclear Materials and Energy       (Followers: 1) Nuclear Physics A       (Followers: 5) Nuclear Physics B       (Followers: 3) Nuclear Physics News       (Followers: 2) Nuclear Science and Engineering       (Followers: 7) Nuclear Technology       (Followers: 5) Nukleonika Particles Physica E: Low-dimensional Systems and Nanostructures       (Followers: 1) Physica Medica       (Followers: 4) Physical Biology       (Followers: 4) Physical Review A       (Followers: 24) Physical Review Accelerators and Beams       (Followers: 4) Physical Review B       (Followers: 32) Physical Review D       (Followers: 13) Physical Review E       (Followers: 42) Physical Review Letters       (Followers: 162) Physics of Atomic Nuclei       (Followers: 10) Physics of Particles and Nuclei       (Followers: 2) Physics of Particles and Nuclei Letters       (Followers: 1) Progress in Particle and Nuclear Physics       (Followers: 2) Radiation Detection Technology and Methods       (Followers: 1) The European Physical Journal D - Atomic, Molecular, Optical and Plasma Physics       (Followers: 29) The European Physical Journal Special Topics       (Followers: 1) World Journal of Nuclear Science and Technology       (Followers: 4)
Similar Journals
 The European Physical Journal Special TopicsJournal Prestige (SJR): 0.552 Citation Impact (citeScore): 2Number of Followers: 1      Hybrid journal (It can contain Open Access articles) ISSN (Print) 1951-6355 - ISSN (Online) 1951-6401 Published by Springer-Verlag  [2467 journals]
• Sleep EEG oscillation associations with plasma amyloid-β42 in apneic

Abstract: Abstract Obstructive sleep apnea (OSA) is very serious and multifactorial sleep disorder in both adults and children. Growing evidence suggests some pathophysiological links between OSA and cognitive decline or Alzheimer's disease (AD). Based on associations between sleep homeostasis alteration in OSA and cognition, here we evaluated potential relationships between plasma Aβ42 levels with biophysical properties of slow wave sleep (SWS) and sleep spindles (SSs) in adolescent samples which different in weight and the presence of OSA. One-night in-lab polysomnography and morning blood collection were performed to estimate sleep EEG oscillation patterns and measure plasma Aβ42 levels. SWS was significantly negatively correlated with plasma Aβ42 in OSA patients only (with and without obesity). Despite a significant association between all SSs parameters and Aβ levels in both obese group (OSA + and OSA−) stronger correlations were observed in obese OSA + patients. So, spindle number, density and duration were positively correlated with Aβ42 levels, and spindle amplitude and frequency were negatively correlated with they. There was only one strong positive correlation between plasma amyloid and spindle number in the OSA non-obese adolescents. Altered SW and spindles activity during sleep in OSA may represent an early dysfunction related to amyloid, possibly reflecting brain damage through hypoxia and metabolic stress, or increased amyloid secretion and reduced Aβ clearance. So, SWA and SSs play important role in neuroplasticity and memory consolidation and they may represent a putative mechanism by which amyloid impairs cognition, as well as rendering it potentially new biomarkers for early neuronal dysfunction in young age.
PubDate: 2023-02-03

• Explicit relation between Fourier transform and fractal dimension of
fractal interpolation functions

Abstract: Abstract This paper provides an explicit representation for the Fourier transform of different kinds of fractal interpolation functions. The construction of fractal functions using the theme of iterated function system has merely provided the functional equation. The Fourier series over the fractal functions is explored in the literary analysis to provide an explicit structure; however, Fourier series can be only studied for the periodic functions. Henceforth, this study investigates the Fourier transform of fractal interpolation functions with function scaling factors to explicitly express both the periodic and non-periodic cases. In addition, formulae relating the fractal dimension and the Fourier transform of fractal functions are presented. Finally, this paper demonstrates the Riemann–Liouville fractional derivative of fractal interpolation functions.
PubDate: 2023-02-03

• Publisher Correction: Over 50 years of behavioural evidence on the
magnetic sense in animals: what has been learnt and how'

PubDate: 2023-02-01

• Supersymmetric Wilson loops on the lattice in the large N limit

Abstract: Abstract We propose additional tests of holography by studying supersymmetric Wilson loops in p+1-dimensional maximally supersymmetric Yang–Mills (SYM) theories on the lattice in the large N limit. In the dual gravity description, this computation involves calculating the area of a fundamental string worldsheet in certain Type II supergravity backgrounds. Though thermodynamic observables have been computed on the lattice using Monte Carlo methods and agree with the supergravity results in various dimensions, not much has been done for the gauge-invariant operators such as the Wilson loop. We provide analytical predictions for these loops for various non-conformal Dp-brane background cases with $$p \le 2$$ in the large N limit and comment on how these can be computed on non-orthogonal lattices in various models.
PubDate: 2023-01-25

• Physico-mathematical models for interacting microbubble clouds during
histotripsy

Abstract: Abstract This work proposes physico-mathematical models for cavitation of microbubble clouds under the influence of bubble–bubble interaction during histotripsy. The mathematical models are formulated to non-interacting and interparticle interacting microbubble clouds on histotripsy under considering the effect of variable surface tension. The governing equations of Keller–Miksis (KM) based on Neo-Hookean (NH) and the Quadratic Law Kelvin–Voigt (QLKV) models are transformed into ordinary differential equations using the non-dimension variables methodology, which are then solved analytically by the modified Plesset–Zwick method. The generalized case of variable surface tension is derived and evaluated for both cases of non-interacting and interacting microbubbles during histotripsy. The effects of the viscoelastic medium on the dynamics of a single microbubble dynamic and interactions between microbubbles through the histotripsy are investigated. From the analysis of the results, the behavior of single bubble growth is bigger than in the case of interaction of multi-bubbles under considering the effect of viscoelastic tissue of Young modulus, viscosity, and stiffening factor on histotripsy. Moreover, the study reveals that, when an increase in the number of cavitation microbubbles occurs, a decrease of the behavior of cavitation microbubbles occurs, on the contrary, increasing of the distance between microbubbles leads to increasing in the growth process; these processes for growth are playing a significant role during the process of histotripsy of cancerous tissues.
PubDate: 2023-01-25

• Kinetics of internal transformations in thermodynamically unstable
ferrofluids

Abstract: Abstract We present results of theoretical study of initial stage of spinodal decomposition and magneto-diffusion transport in ferrofluids with single-domain ferromagnetic nanoparticles. Effect of magnetic field and the long-ranged interparticle correlations on kinetics of this transformation is analyzed.
PubDate: 2023-01-25

• Structural and stochastic transformations in a system of coupled
populations

Abstract: Abstract A problem of the study of underlying mechanisms for structural transformations in coupled multicomponent biological systems is considered. We focus on the case of two coupled subunits, which, being isolated, exhibit chaotic modes. We use the Hassell map as a conceptual model for subunits. A variety of non-equilibrium mono- and multistable oscillatory regimes with in-phase and anti-phase synchronization in the coupled system is described. An impact of random disturbances on the these regimes is studied. High sensitivity to noise causing stochastic transformations from anti-phase to in-phase synchronization is investigated. We show how such transformations of the synchronization modes are accompanied by transitions from order to chaos.
PubDate: 2023-01-20

• Quasi-stationary flow in a channel with a ferrofluid drop, induced by a
rotational magnetic field

Abstract: Abstract The paper deals with theoretical study of circulating flow in a channel, filled with non-magnetic liquid and injected drop of a soluble ferrofluid under the action of a uniform rotating magnetic field. The aim of this work is development of a scientific background of intensification of drag transport in thrombosed blood vessels. Our results show that at quite realistic parameters of the system in the channel with the thickness of several millimeters, circulating flow with the rate about hundred millimeter per second can be generated. It can provide significant intensification of molecular admissions (thrombolytics) transport in the channel.
PubDate: 2023-01-20

• Growth dynamics of breath figures on phase change materials: a numerical
study

Abstract: Abstract We present a numerical investigation of the effect of droplet motion on the growth dynamics of breath figures during condensation on phase change material. Breath figures are a micro-scale pattern of droplets that form when droplets condense on a cold surface. The numerical model considers the growth of droplets due to condensation, droplet coalescence, random droplet movement, and surface wettability. We study the dynamics of breath figures in terms of the time of evolution of the mean radius of droplets $$\langle R \rangle$$ , surface coverage $$\varepsilon ^2$$ , and the droplet size distribution $$n_{\mathrm{s}}$$ . We demonstrate that the droplets’ movement significantly changes the distribution of droplets condensing on a phase change material by increasing coalescence. We observed four growth regimes on phase change materials due to the movement of droplets. First, in the initial regime, $$\langle R \rangle \sim t^{\alpha _1}$$ , intermediate regime $$\langle R \rangle \sim t^{\alpha _2}$$ , coalescence-dominated regime $$\langle R \rangle \sim t^{\alpha _3}$$ , and late regime $$\langle R \rangle \sim t^{\alpha _4}$$ . The growth exponents are $$\alpha _1 \approx 1/2$$ , $$\alpha _2 \approx 1$$ , and $$\alpha _4 = 1/3$$ . While the growth exponent $$\alpha _3$$ depends on the contact angle of the surface $$\theta$$ . Furthermore, we show the scaling of the droplet size distributions at different times.
PubDate: 2023-01-19

• Characterization of digital modulations using the phase diagram analysis

Abstract: Abstract Digital modulation identification is a challenging and important operation in the security communication field. Identifying properly a digital modulation and its parameters is a key operation in many applications, such as cognitive radio, communication intelligence and dynamic spectrum allocation. However, traditional methods face a stalemate in which the accuracy of the identification process is quite low. Therefore, new descriptors are needed as an alternative solution or to complement the existing ones. Using a new method from the field of nonlinear dynamic systems, namely the phase diagram representation, we want to extract some features to help recognizing the type of used modulations. This method can be used even in noisy backgrounds, with the help of an additional processing algorithm, to give important information about the signal and the used modulation.
PubDate: 2023-01-18

• Using a cylindrical piezoelectric transducer to focus ultrasound in
superfluid helium

Abstract: Abstract Ultrasound in bulk liquid and superfluid helium has been used for multiple studies, including generation of quantum turbulence, and inducing homogenous or heterogenous cavitation. Both hemispherical and planar ultrasonic transducers have been used in the past, which optimize the focusing volume and the degree of focusing. In this paper, we demonstrate the application of a cylindrical piezoelectric transducer to achieve a linear focusing configuration. We have developed a new method to calibrate the pressure generated by the ultrasonic transducer, where we measured the threshold ultrasound drive at which mist was observed. The results were compared with those from a hemispherical geometry. The linear focusing configuration was further demonstrated to observe the cavitation of single electron bubbles arranged in a linear array. Our experiments are relevant to studies in liquid helium that require large pressure oscillations in controlled volumes.
PubDate: 2023-01-18

• India at CERN: pre-LHC

Abstract: Abstract The history of India–CERN engagement is traced from the time of inception and establishment of CERN as an important player in the field of particle physics. Indian groups were involved in a number of CERN-based experiments during the 1960s, 70s and 80s. During the 1990s, the Indian funding agencies (Departments of Atomic Energy (DAE) and Science and Technology (DST)) came together to ensure a comprehensive Indian participation in the LHC project, with many Indian physics groups participating in the ALICE and CMS collaborations and a number of DAE institutions contributing towards the construction of the LHC machine.
PubDate: 2023-01-18

• Magnetic losses in single-domain magnetic particles

Abstract: Abstract Single-domain magnetic particles have unique and excellent magnetic properties and are widely used in biomedical applications, but there are many mechanisms for their response to external magnetic fields. Different models apply under various conditions, which challenges researchers who want to choose a suitable model for their studies. Based on this situation, this paper comprehensively summarizes the mechanisms and models of magnetic loss of single-domain magnetic particles in an external magnetic field. Notably, this paper comprehensively summarizes the non-equilibrium kinetic model of the response of single-domain superparamagnetic particles to external magnetic fields. In this paper, the mechanism for hysteresis loss of single-domain ferromagnetic particles and a model for its calculation are presented, the Stoner–Wohlfarth (SW) model based on equilibrium state and the statistical mechanics model based on non-equilibrium state are introduced; then, the mechanism for the relaxation loss of single-domain superparamagnetic particles and a model for its calculation are introduced, and the linear response model based on equilibrium state and the statistical mechanics model based on non-equilibrium state are introduced in a general way. Lastly, the development of single-domain superparamagnetic particles is briefly prospected. This review provides a convenient reference for researchers to explore the magnetic properties of single-domain magnetic particles and promotes their application and development in the field of biomedicine.
PubDate: 2023-01-16

• Over 50 years of behavioural evidence on the magnetic sense in animals:
what has been learnt'

Abstract: Abstract Magnetoreception is a key element in the sensory repertoire of many organisms, and it has been shown to play a particular role in animal navigation. While the first data to demonstrate a magnetic compass in songbirds through behavioural measures were presented decades ago, studies of behaviour are still the main source of information in learning about the magnetic senses. The behavioural evidence is, however, scattered with sometimes contradictory results. Partly, this is a consequence of a wide spectrum of methods used across multiple research groups studying different model organisms. This has limited the ability of researchers to pin down exactly how and why animals use the Earth’s magnetic field. Here, we lay out how a range of methods for testing behaviour spanning from field observations to laboratory manipulations can be used to test for a magnetic sense in animals. To this end, we discuss the principal limitations of behavioural testing in telling us how animals sense the magnetic field, and we argue that behaviour must go hand in hand with other fields to advance our understanding of the magnetic sense.
PubDate: 2023-01-11

• Impact of different magnetic materials added to silver–magnetite
nanoparticles on the structural, magnetic and antimicrobial properties

Abstract: Abstract Different magnetic materials of spinel copper and cobalt nanoferrites added to silver–magnetite nanoparticles were fabricated by a facile, low cost, and rapid auto-combustion method to form a nanocomposite. X-ray diffraction patterns and atomic force microscopy were studied for the investigated samples and confirmed their nanosize range. Adding cobalt nanoferrite to silver–magnetite (CoAF) yielded a more pronounced effect in the magnetic measurements than adding copper nanoferrite (CuAF). This result was attributed to the much higher coercivity Hc and saturation magnetization Ms (5.7-fold and 2.8-fold, respectively) of CoAF than CuAF; accordingly, the CoAF nanocomposite can be applied to a permanent magnet. Next, the operating frequencies of the nanocomposites were calculated from the magnetic measurements. The CoAF and CuAF nanocomposites were applicable in the microwave super-high-frequency C-band and the microwave super-high-frequency S-band, respectively. Both nanocomposites were ineffective against the tested fungi but showed strong antimicrobial activities against the tested Gram-positive and Gram-negative bacteria. Thus, CoAF and CuAF nanocomposites are potential antibacterial nanomaterials for biomedical applications.
PubDate: 2023-01-11

• First-principles study of ultrafast bandgap dynamics in laser-excited
$$\alpha$$ -quartz

Abstract: Abstract Femtosecond-laser-induced evolution of $$\alpha$$ -quartz bandgap was calculated using first principles. First, time-dependent density functional theory (TDDFT) was used to describe excited electron dynamics during the laser pulse irradiation. Then, the temperature of excited electrons was estimated using finite-temperature DFT. Finally, the GW approximation was applied to calculate the electronic structure modification driven by hot electrons. As a result, an ultrafast decrease of the bandgap is observed during a 15-fs laser pulse with a drop of 35 % at laser intensities near the damage threshold.
PubDate: 2023-01-11

• Attosecond probing of photoionization dynamics from diatomic to many-atom
molecules

Abstract: Abstract The natural diversity of molecules in terms of geometries, chemical properties, work functions, among others, offers an impressive laboratory for observing fundamental electron dynamics down to the attosecond timescale. Here, we use some recent angularly resolved Wigner time delay measurements performed in our attoscience laboratory in Lyon to illustrate the electron dynamics in molecules containing a few (N $$_2$$ , C $$_2$$ H $$_2$$ , and C $$_2$$ H $$_4$$ ) to many atoms (C $$_{10}$$ H $$_8$$ and C $$_{10}$$ H $$_{16}$$ ). In the few-atom case, the Wigner delay can be measured for a particular electronic state. This allows us to identify the underlying physical mechanisms governing photoionization processes, such as the well-known shape resonance in valence-ionized nitrogen molecule. Promising new experimental results using angle-resolved photoelectron spectroscopy on ethylene show a tendency in the ionization time delay between the X and A states. As a perspective, we show that for many-atom molecules (C $$_{60}$$ and C $$_{10}$$ H $$_x$$ , with $$x=8$$ or 16), the photoionization metrology can address different kinds of electron dynamics with a collective behavior.
PubDate: 2023-01-11

• Correction: Numerical simulation of unidimensional bubbly flow in linear
and non-linear one parameter elastic liquid through a nozzles

PubDate: 2023-01-04

• Strong field non-Franck–Condon ionization of H $$_2$$ : a
semi-classical analysis

Abstract: Abstract Single ionization of H $$_2$$ molecules exposed to strong and short laser pulses is investigated by a semi-classical method. Three laser characteristics are considered: (i) The carrier-wave frequency corresponds to wavelengths covering and bridging the two ionization regimes: From tunnel ionization (TI) at 800 nm to multiphoton ionization (MPI) at 266 nm. (ii) Values of the peak intensity are chosen within a window to eliminate competing double ionization processes. (iii) Particular attention is paid to the polarization of the laser field, which can be linearly or circularly polarized. The results and their interpretation concern two observables, namely the end-of-pulse total ionization probability and vibrational distribution generated in the cation H $$_2^+$$ . The most prominent findings are an increased ionization efficiency in circular polarization and a vibrational distribution of the cation that favors lower-lying levels than those that would be populated in a vertical (Franck–Condon) ionization, leading to non-Franck–Condon distributions, both in linear and circular polarizations.
PubDate: 2023-01-04

• Biomarkers of the psychophysiological state during the cognitive tasks
estimated from the signals of the brain, cardiovascular and respiratory
systems

Abstract: Abstract Diagnostics of the psychophysiological state at rest and under stressful conditions is an important problem. We tested various biomarkers of the psychophysiological state of healthy volunteers at rest and while completing stress-inducing cognitive tasks, namely the Stroop color word test and mental arithmetic test. We tested the biomarkers based on the analysis of electroencephalograms, respiratory signals, and the signals of cardiovascular system. We investigated both the individual characteristics of these signals in the low-frequency range (less than 0.5 Hz), and characteristics of their interaction. According to our results, the most sensitive biomarkers of cognitive task stress are nonlinear phase coherence between the 0.15 and 0.40 Hz oscillations in the respiratory signal and heart rate variability, and integral power of the 0.15–0.40 Hz oscillations in the frontal lobe EEG leads.
PubDate: 2023-01-04

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