The European Physical Journal Plus最新文献

{"title":"Plasmonic nanostructures for color vision deficiency (CVD) management","authors":"N. Roostaei,&nbsp;S. M. Hamidi","doi":"10.1140/epjp/s13360-024-05921-6","DOIUrl":"10.1140/epjp/s13360-024-05921-6","url":null,"abstract":"<div><p>Color blindness, also known as color vision deficiency (CVD), is a prevalent ocular disorder that hinders distinguishing different colors, a challenge experienced by a considerable portion of the global population (8−10% of males and 0.4−0.5% of females). CVD patients are frequently restricted from crucial professions such as military or police, and cannot recognize colors in public places or media like watching TV. Despite ongoing efforts, there is no definitive cure for color blindness; however, various color filter-based devices such as tinted glasses and contact lenses have been introduced to assist CVD people. Recently, plasmonic nanostructures have attracted significant attention for CVD management by replacing chemical dyes due to their outstanding properties and the adjustability of plasmonic resonances. This study reviews the different wearables utilized in CVD management, such as eyeglasses and contact lenses, with a special emphasis on the innovative plasmonic eye wearables that have emerged in recent advances. The capability to modify the plasmonic properties by manipulating their morphology provides novel perspectives for CVD management and smart ophthalmic wearables.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"139 12","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142875278","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Kinetic theory of stellar systems and two-dimensional vortices","authors":"Pierre-Henri Chavanis","doi":"10.1140/epjp/s13360-024-05797-6","DOIUrl":"10.1140/epjp/s13360-024-05797-6","url":null,"abstract":"<div><p>We discuss the kinetic theory of stellar systems and two-dimensional vortices and stress their analogies. We recall the derivation of the Landau and Lenard–Balescu equations from the Klimontovich formalism. These equations take into account two-body correlations and are valid at the order 1/<i>N</i>, where <i>N</i> is the number of particles in the system. They have the structure of a Fokker–Planck equation involving a diffusion term and a drift term. The systematic drift of a vortex is the counterpart of the dynamical friction experienced by a star. At equilibrium, the diffusion and the drift terms balance each other establishing the Boltzmann distribution of statistical mechanics. We discuss the problem of kinetic blocking in certain cases and how it can be solved at the order <span>(1/N^2)</span> by the consideration of three-body correlations. We also consider the behaviour of the system close to the critical point following a recent suggestion by Hamilton and Heinemann (2023). We present a simple calculation, valid for spatially homogeneous systems with long-range interactions described by the Cauchy distribution, showing how the consideration of the Landau modes regularizes the divergence of the friction by polarization at the critical point. We mention, however, that fluctuations may be very important close to the critical point and that deterministic kinetic equations for the mean distribution function (such as the Landau and Lenard–Balescu equations) should be replaced by stochastic kinetic equations.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"139 12","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjp/s13360-024-05797-6.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142880480","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optical transition rates of a polar quantum disc with conical disclination in a magnetic field: effects of some forms of the electric potential","authors":"Vinod Kumar,&nbsp;Surender Pratap,&nbsp;Moletlanyi Tshipa,&nbsp;Monkami Masale","doi":"10.1140/epjp/s13360-024-05909-2","DOIUrl":"10.1140/epjp/s13360-024-05909-2","url":null,"abstract":"<div><p>Theoretical investigations are carried out of optical transitions of a polar disc with a conical disclination and under the influence of a parallel applied uniform magnetic field. Additional confinement of the electron is due to an intrinsic electric confining potential of the polar disc modelled by any of the forms: infinite polar square well (IPSW), parabolic potential (PP) and shifted parabolic potential (SPP). As is well known, the parallel applied magnetic field lifts the double degeneracy of the non-zero azimuthal quantum number <i>m</i> electronic states. This Zeeman splitting is such that the <span>(m&gt;0)</span>electron energy sub-bands increase monotonically with an increase of the magnetic field, while the <span>(m&lt;0)</span>states initially decrease as the magnetic field is increased. Now, in systems with cylindrical symmetry, the allowed optical transitions are those between the electron’s states whose azimuthal quantum numbers differ by unity. The conical disclination is characterized by a kink parameter which is <span>(kappa &lt;1)</span> for a segment cut off from the disc and <span>(kappa &gt;1)</span> for a segment introduced into the polar disc. An increase of <span>(|kappa |)</span> leads to a decrease of transition energies, which in turn gives rise to an increase of the corresponding transition rates of optical transitions. Thus, peaks of transition rates get red shifted as the kink parameter increases. Additionally, the magnitude of the transition rates increases with the increasing value of the kink parameter. The magnetic field enhances transition energies involving states with angular momentum in one direction (here, those with positive angular momentum number <i>m</i>), while it decreases those involving states with angular momentum in the opposite direction (negative <i>m</i> states). It has also been found that parallel magnetic field blue shifts peaks of rates of transitions involving the <span>(m&gt;0)</span> states, while it red shifts peaks of those involving the <span>(m&lt;0)</span> states. The parabolic potential enhances transition energies, while the shifted parabolic potential reduces the transition energies. Consequently, the parabolic potential blue shifts peaks of transition rates, while the shifted parabolic potential red shifts the peaks. The results presented here suggest that a conical disclination and the overall confinement potential can be employed to tune and modulate the optical transition rates of a quantum disc.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"139 12","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjp/s13360-024-05909-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142880482","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An investigation into gold nanoparticle-doped sodium-variety zinc borate glasses for gamma and neutron shielding applications","authors":"Sangeeta B. Kolavekar,&nbsp;G. B. Hiremath,&nbsp;N. M. Badiger,&nbsp;N. H. Ayachit","doi":"10.1140/epjp/s13360-024-05926-1","DOIUrl":"10.1140/epjp/s13360-024-05926-1","url":null,"abstract":"<div><p>Sodium-zinc borate glasses doped with gold nanoparticles have promising shielding properties against gamma rays and neutrons due to several advantageous properties. In the present work, gamma interaction parameters such as MAC, <i>Z</i>_eff, EBF, and EABF have been investigated in the energy range from 0.015 to 15 MeV using Phy-X/PSD software. <i>Z</i>_eff values are found to be higher for 3BZNA and lower for 1BZNA in the medium and higher energy regions. It is also found that 3BZNA glass has lower MFP values than 1BZNA, indicating that 3BZNA glass is the best material for shielding gamma radiation. The MFP data demonstrate that, for energies greater than 1 MeV, BZNA glasses offer superior gamma radiation shielding compared to commercial glass and ordinary concrete. Furthermore, as compared to other glass types, the <i>Z</i>_eff of the 3BZNA version performs better at energies above 0.08 MeV. 3BZNA glass performs better than OC, BMC, SMC, and water in terms of FNRCS values. According to these findings, 3BZNA glass shows promise as a radiation shielding material.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"139 12","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142870378","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Exploring multistability and bifurcations in a three-species Smith growth model incorporating refuge, harvesting, and time delays","authors":"Nazmul Sk,&nbsp;Sayan Mandal,&nbsp;Pankaj Kumar Tiwari,&nbsp;Joydev Chattopadhyay","doi":"10.1140/epjp/s13360-024-05874-w","DOIUrl":"10.1140/epjp/s13360-024-05874-w","url":null,"abstract":"<div><p>This study delves into a tritrophic ecological model encompassing three distinct species, elucidating predator–prey dynamics through the lens of Smith growth pattern. The model integrates several pivotal ecological elements, including an additive Allee effect dictating prey growth, a ratio-dependent functional response characterizing predator–prey interactions, the provision of refuge for intermediate predators, and the incorporation of a Michaelis–Menten-type harvesting mechanism of the top predators. Moreover, we incorporate gestation and harvesting delays as novel factors to scrutinize their impact on the overall dynamics of the food web system. Through an extensive analysis of the delayed and non-delayed models, our investigation rigorously explores the equilibrium points, stability attributes, and bifurcations structures. In the absence of time delay, our findings underscore the profound influence wielded by factors such as refuge availability, Allee effect, harvesting, and the availability of environmental resources in dictating the survival prospects of the involved species. Furthermore, our exploratory analysis uncovers a rich tapestry of intricate dynamics, encompassing chaotic behavior, periodic oscillations and, multistability. These revelations underscore the profound complexity inherent in the ecosystem, particularly accentuated by the temporal delays involved in gestation and harvesting processes. The nuanced interplay between these temporal delays and ecological parameters contributes to the emergence of diverse and complex dynamics, elucidating the intricate nature of the ecological systems.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"139 12","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142870372","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Proton-induced nuclear reactions on barium-136 for the production of the medically relevant radionuclide lanthanum-135","authors":"I. A. Khomenko,&nbsp;E. S. Kormazeva,&nbsp;T. V. Bogomolova,&nbsp;E. B. Furkina,&nbsp;V. I. Novikov,&nbsp;R. A. Aliev","doi":"10.1140/epjp/s13360-024-05917-2","DOIUrl":"10.1140/epjp/s13360-024-05917-2","url":null,"abstract":"<div><p>The cross-sections of ¹³⁶Ba(p,x) nuclear reactions were measured using the stack foil technique in the energy range of 29.3 → 14.0 MeV for the first time. We compared the experimental values with the data from the TENDL-2023 library. The yields of radionuclides formed during irradiation calculated by integrating the cross-sections are: 951 MBq/(μA·h) for ¹³⁵La, 12 MBq/(μA·h) for ¹³³La, 30 MBq/(μA·h) for ^135mBa, and 0.3 MBq/(μA·h) for ¹³²Cs. It was shown that the ¹³⁶Ba(p,2n)¹³⁵La reaction is suitable for production of ¹³⁵La for medicine in terms of activity and radioisotopic purity of the obtained product. Chromatographic separation of lanthanum radioisotopes from barium target was carried out using the TRU resin sorbent.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><img></picture></div></div></figure></div></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"139 12","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142870371","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Potential biological and optoelectronic applications of AgO:ZnO nanocomposite synthesized by green approach","authors":"Waleed R. Talib,&nbsp;Ashwin Sudhakaran,&nbsp;Allwin Sudhakaran,&nbsp;Raghad S. Mohammed","doi":"10.1140/epjp/s13360-024-05920-7","DOIUrl":"10.1140/epjp/s13360-024-05920-7","url":null,"abstract":"<div><p>This study aimed to estimate the potential optoelectronic and biological properties of AgO:ZnO nanocomposite synthesized by an environmentally friendly method. The synthesis of nanocomposite was carried out by reducing silver nitrate with <i>Salvia hispanica</i> extra, and zinc nitrate was mixed to produce the nanocomposite. An extensive examination was carried out on the physical and biological characteristics of the synthesized nanocomposite using several approaches. The EDX analysis confirmed the purity of the synthesized sample via the presence of elements Ag, Zn, and O only in the nanocomposite. The crystal structure of nanocomposite with hexagonal phase and average crystallite size of 56.8 nm was confirmed by X-ray diffraction. The formation of fibrous AgO:ZnO nanoparticles with an average diameter of 1.021 ± 0.6 μm was indicated by field-emission scanning electron microscopy examination. The optical property investigation revealed that the nanocomposite had a wide absorption band with an absorption peak at 425 nm. The observed phenomenon was attributable to the occurrence of electronic transitions within the material. The direct bandgap energy of 2.90 eV and the Urbach energy of 0.456 eV for the nanocomposite demonstrated the presence of defect states in the bandgap region. The measured values of the conduction band edge (<i>E</i>_CB) and valence band edge (<i>E</i>_VB) additionally revealed the material’s electronic structure. The biological potential of AgO:ZnO nanocomposite was evaluated by the agar well diffusion technique against Gram-positive and Gram-negative bacteria and a fungus. The extensive investigation of the AgO:ZnO nanocomposite’s characteristics has shown its potential for use in a wide range of photonic, optoelectronic, and biological applications.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"139 12","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142859496","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Predicting quantum evolutions of excitation energy transfer in a light-harvesting complex using multi-optimized recurrent neural networks","authors":"Shun-Cai Zhao,&nbsp;Yi-Meng Huang,&nbsp;Zi-Ran Zhao","doi":"10.1140/epjp/s13360-024-05825-5","DOIUrl":"10.1140/epjp/s13360-024-05825-5","url":null,"abstract":"<div><p>Constructing models to discover physics underlying magnanimous data is a traditional strategy in data mining which has been proved to be powerful and successful. In this work, a multi-optimized recurrent neural network (MRNN) is utilized to predict the dynamics of photosynthetic excitation energy transfer (EET) in a light-harvesting complex. The original data set produced by the master equation was trained to forecast the EET evolution. An agreement between our prediction and the theoretical deduction with an accuracy of over 99.26% is found, showing the validity of the proposed MRNN. A time-segment polynomial fitting multiplied by a unit step function results in a loss rate of the order of <span>(10^{-5})</span>, showing a striking consistence with analytical formulations for the photosynthetic EET. The work sets up a precedent for accurate EET prediction from large data set by establishing analytical descriptions for physics hidden behind, through minimizing the processing cost during the evolution of week-coupling EET.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"139 12","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142870363","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evolutionary complex network for uncovering rich structure of series","authors":"Bin Huang,&nbsp;Fang Wang,&nbsp;Hongyu Chen,&nbsp;Fan Liu","doi":"10.1140/epjp/s13360-024-05802-y","DOIUrl":"10.1140/epjp/s13360-024-05802-y","url":null,"abstract":"<div><p>Important structures hidden in series often reflect various real-world information. Analyzing and recognizing series is, therefore, of great practical significance. Complex networks have shown outstanding performance in mining the topological features of data, which provides rich information from high-dimensional perspective. In this work, we develop a new evolutionary complex network mapped method from series, termed weighted <i>k</i>-series maximum differential graph (<i>k</i>s-maxDG). This method facilitates the mapping of series into complex networks from multiple perspectives, providing a more comprehensive exploration of their topological properties. These dynamic network properties offer deeper insights into the evolving structure of the original series. We validate its accuracy in uncovering the topological features theoretically and empirically, showing excellent performance in chaos and noise identification as well as series classification.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"139 12","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142859498","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Two-dimensional gap solitons in cubic-quintic nonlinear media with PT-symmetric lattices and fractional diffraction","authors":"Xing Zhu,&nbsp;Milivoj R. Belić,&nbsp;Dumitru Mihalache,&nbsp;Dan Xiang,&nbsp;Liangwei Zeng","doi":"10.1140/epjp/s13360-024-05873-x","DOIUrl":"10.1140/epjp/s13360-024-05873-x","url":null,"abstract":"<div><p>Gap solitons in two types of cubic-quintic nonlinear media—the competing focusing-defocusing and the cooperative focusing-focusing types—are studied in this work. We discover two families of two-dimensional solitons in the semi-infinite band gap of a PT-symmetric lattice under the cubic-quintic nonlinearity and fractional diffraction. The existence and stability domains of dipole and tripole solitons are examined for different values of various parameters. Interestingly, the Lévy index does not affect much the value of the phase transformation point in the model, but affects more strongly the stability regions of both types of solitons. The stability domains for these solitons are obtained by the linear stability analysis and are confirmed by direct numerical simulations.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"139 12","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142859497","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}