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Artículos de revistas sobre el tema "Radiation from complex-shaped plates"

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Publicado: 12 de octubre de 2023
Última modificación: 31 de julio de 2025

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1

Atalla, Noureddine, and Alain Berry. "Acoustic Radiation from a Coupled Planar Semi-Complex Structure in Heavy Fluid." Journal of Ship Research 38, no. 03 (1994): 213–24. http://dx.doi.org/10.5957/jsr.1994.38.3.213.

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A mathematical model is derived to address the vibrations and sound radiation into a dense fluid, of a coupled system consisting of two semi-complex plates (i.e., supporting added mass, stiffeners, and having arbitrary elastic boundary conditions) linked in four points through multistage suspensions elements. The supporting plate is subjected to point, line or surface harmonic excitation, while the radiating plate is excited through the suspensions. Both plates are assumed to be baffled, and the radiating plate is fluid loaded. The model is based on a variational approach for the plates, and a
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2

Wen, Hua Bing, Lin Bo Liu, Zi Long Peng, and Qi Dong Zhong. "Research on the Effects of Blocking Mass on Vibration Resistance Performance of L-Shaped Plates." Applied Mechanics and Materials 482 (December 2013): 131–35. http://dx.doi.org/10.4028/www.scientific.net/amm.482.131.

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The theory of vibration resistance of blocking mass at the corner interface of L-shaped plates is put forward from the perspective of wave approach. The equation of transmission and reflection coefficients of flexure wave is deduced by the presented theory. Based on FE/SEA method, the vibration resistance performance of the hollow blocking mass at the corner interface of L-shaped plates was studied through numerical simulation. The results show that the hollow blocking mass can impede the propagation of the high frequency vibration waves, reduce the vibration and sound radiation of the latter
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3

Taratorin, Andrey, and Vladimir Tupov. "PETAL-SHAPED SILENCERS USAGE FOR NOISE REDUCTION IN CYLINDRICAL CHANNELS." VOLUME 39, VOLUME 39 (2021): 99. http://dx.doi.org/10.36336/akustika20213999.

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The article presents data on the results of petal-shaped silencer mathematical modeling. Dissipative silencers of complex shapes are the most promising technology. This design allows for achieving the required noise reduction. At the same time, geometric shape optimization allows reducing the aerodynamic drag to the smallest values. The article compares the variants of the silencer with the rotation angles of the plates 45 and 70 degrees. The use of such plates allows you to increase the acoustic efficiency of the silencer by eliminating the radiation effect. In the article, there are the resu
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4

Tenenbaum, Roberto A., and Marcelo Bruno S. Magalhães. "A New Technique to Identify Arbitrarily Shaped Noise Sources." Shock and Vibration 13, no. 4-5 (2006): 219–32. http://dx.doi.org/10.1155/2006/231625.

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Acoustic intensity is one of the available tools for evaluating sound radiation from vibrating bodies. Active intensity may, in some situations, not give a faithful insight about how much energy is in fact carried into the far field. It was then proposed a new parameter, the supersonic acoustic intensity, which takes into account only the intensity generated by components having a smaller wavenumber than the acoustic one. However, the method is only efective for simple sources, such as plane plates, cylinders and spheres. This work presents a new technique, based on the Boundary Elements Metho
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5

Syshchenko, V. V., A. I. Tarnovsky, and V. A. Krivtsov. "Transition Radiation on a Conducting Target Shaped as a Right Dihedral Angle." Поверхность. Рентгеновские, синхротронные и нейтронные исследования, no. 5 (September 22, 2024): 91–96. http://dx.doi.org/10.31857/s1028096024050139.

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The transition radiation of a charged particle in the simplest case of its incidence onto an infinite, perfectly conducting plane can be described using the method of images known from electrostatics. The same method makes it possible to find the field distribution in more complex cases, such as the field created by a point particle in the presence of two intercepting conducting planes, the angle between which divides exactly the angle of 180°. Based on the method of images, a description is given of the transition radiation that occurs when a fast-charged particle falls on a target in the for
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6

García A., Carlos, Nicolas Dauchez, and Gautier Lefebvre. "Radiation of thin complex plates estimated with the landscape of localisation theory." Journal of the Acoustical Society of America 151, no. 4 (2022): A167. http://dx.doi.org/10.1121/10.0010996.

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The landscape of localisation is a practical tool that enables the prediction of the geographical localisation of localized modes and helps us to understand the transition between localized and delocalised states. Moreover, approximations based on the Rayleigh quotient and on a variant of Weyl’s law are employed to predict the eigenfrequencies for the Schro ¨ dinger operator in quantum mechanics, but they are also valid for the Laplace and biharmonic operators, which characterize the behaviour of most dynamical systems in acoustics and vibrations. When studying the acoustic radiation from a vi
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7

Aslanov, T. G., and S. A. Ibragimov. "Investigation of the dependencies of the Vivaldi antenna with a resonator in the electrodynamic modeling software complex." Herald of Dagestan State Technical University. Technical Sciences 51, no. 1 (2024): 31–39. http://dx.doi.org/10.21822/2073-6185-2024-51-1-31-39.

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Objective. The goal of the study is to optimize a computer model of a Vivaldi antenna with conductive plates on the same side as the resonator.Method. The study is based on electrodynamic modeling methods.Result.The paper presents a computer model of a Vivaldi antenna with conductive plates on one side with a resonator. A comparative analysis of two types of Vivaldi antennas was carried out of the dependence of the beam width and the voltage standing wave ratio on the radius of the current-conducting plate curve in the form of lobes and the values of the opening in two planes θ = 900 (the plan
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8

Oji, Tatsuo, Stephen Q. Dornbos, Keigo Yada, et al. "Penetrative trace fossils from the late Ediacaran of Mongolia: early onset of the agronomic revolution." Royal Society Open Science 5, no. 2 (2018): 172250. http://dx.doi.org/10.1098/rsos.172250.

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The Cambrian radiation of complex animals includes a dramatic increase in the depth and intensity of bioturbation in seafloor sediment known as the ‘agronomic revolution’. This bioturbation transition was coupled with a shift in dominant trace fossil style from horizontal surficial traces in the late Precambrian to vertically penetrative trace fossils in the Cambrian. Here we show the existence of the first vertically penetrative trace fossils from the latest Ediacaran: dense occurrences of the U-shaped trace fossil Arenicolites from late Precambrian marine carbonates of Western Mongolia. Thei
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9

Atalla, N., and J. Nicolas. "A Formulation for Mean Flow Effects on Sound Radiation from Rectangular Baffled Plates with Arbitrary Boundary Conditions." Journal of Vibration and Acoustics 117, no. 1 (1995): 22–29. http://dx.doi.org/10.1115/1.2873863.

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A general formulation of the sound radiation from fluid-loaded rectangular baffled plates with arbitrary boundary conditions has been developed by Berry et al. (JASA, Vol. 90, No. 4, Pt. 2, 1991). In this paper, an extension of this formulation to inviscid, uniform subsonic flow is considered. The analysis is based on a variational formulation for the transverse vibrations of the plate and the use of the extended, to uniformly moving media, form of the Helmholtz integral equation. The formulation shows explicitly the effect of the flow in terms of added mass, and radiation resistance. Furtherm
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10

Putra, Azma, Nurain Shyafina, Noryani Muhammad, Hairul Bakri, and Noor Fariza Saari. "Development of Hybrid Semi-Analytical and Finite Element Analysis to Calculate Sound Radiation from Vibrating Structure." Advanced Materials Research 845 (December 2013): 71–75. http://dx.doi.org/10.4028/www.scientific.net/amr.845.71.

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Simple analytical model of plate dynamics usually applies for rectangular plate with simply supported edges. Analytical model of sound radiation from rectangular plate is also convenient, but not for other geometries and other boundary conditions. This paper presents a hybrid mathematical model which combines a semi-analytical model with the Finite Element Analysis (FEA) method to determine sound radiation from a vibrating structure. The latter is employed to calculate the vibration velocity of a structure with a rather complex geometry. The results are then used as the input in the semi-analy
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11

Sedlmayr, Erwin. "From Molecules to Grains." International Astronomical Union Colloquium 146 (1994): 163–85. http://dx.doi.org/10.1017/s025292110002131x.

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Cosmic dust is an ubiquiteous component of the interstellar medium, the presence of which has severe bearings both upon the observations and upon the physical description and realistic modelling of astronomical objects. In most dusty objects, the grain component is intimately interwoven with the gas component and the radiation field, and, hence strongly affects the thermodynamical, the hydrodynamical and the chemical structure of the object. Therefore any consistent description of the astrophysical dust complex has to rely upon a treatment where these aspects are properly taken into account. I
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12

Ibragimov, Renat F., Yakov A. Kokorev, Anastasia P. Denisenko, Elena V. Ryabeva, Valery T. Samosadny, and Hamza Hasnaoui. "Experimental determination of the induced activity in activation detectors of a complex geometric shape." Nuclear Energy and Technology 6, no. 3 (2020): 149–54. http://dx.doi.org/10.3897/nucet.6.57738.

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The paper presents the results of experimental determination of the induced activity in copper-/aluminum-based activation detectors when irradiated with neutrons with energies of about 14 MeV. The activation detectors were square-shaped metal plates with a thickness from 1.0 to 1.5 mm and a side size about 5.0 cm. These dimensions significantly exceed those of the detectors that are used in the research of high-intensity neutron fluxes. The detectors described in this work can be used for studying low-intensity neutron fluxes (with a flux density of up to 106 n/cm2∙s). It is shown that, when w
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13

Ibragimov, Renat F., Yakov A. Kokorev, Anastasia P. Denisenko, Elena V. Ryabeva, Valery T. Samosadny, and Hamza Hasnaoui. "Experimental determination of the induced activity in activation detectors of a complex geometric shape." Nuclear Energy and Technology 6, no. (3) (2020): 149–54. https://doi.org/10.3897/nucet.6.57738.

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The paper presents the results of experimental determination of the induced activity in copper-/aluminum-based activation detectors when irradiated with neutrons with energies of about 14 MeV. The activation detectors were square-shaped metal plates with a thickness from 1.0 to 1.5 mm and a side size about 5.0 cm. These dimensions significantly exceed those of the detectors that are used in the research of high-intensity neutron fluxes. The detectors described in this work can be used for studying low-intensity neutron fluxes (with a flux density of up to 10<sup>6</sup> n/cm<sup>2</sup>∙s). It
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14

Ahmed, E. S. "Conformal Band-Notch UWB Monopole Antenna on Finite Cylindrical Substrates." Engineering, Technology & Applied Science Research 3, no. 3 (2013): 440–45. http://dx.doi.org/10.48084/etasr.332.

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A microstrip-fed new UWB monopole antenna with a band-notch characteristic mounted on the finite cylindrical surface is presented. The proposed antenna consists of a rectangular metal radiation patch fed by a 50 ohm microstrip line and a rectangular ground plane. To achieve ultra-wideband, three modifications are introduced. The first one is to blend the upper and lower corners of the radiating plates. The second one is to remove a circular section from the radiating metal. The third one is to blend the upper corners of the ground plane. The antenna is designed on a substrate with dielectric c
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15

Besserguenev, V. G., R. J. F. Pereira, M. C. Mateus, I. V. Khmelinskii, R. C. Nicula, and E. Burkel. "TiO2thin film synthesis from complex precursors by CVD, its physical and photocatalytic properties." International Journal of Photoenergy 5, no. 2 (2003): 99–105. http://dx.doi.org/10.1155/s1110662x03000205.

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PhotocatalyticTiO2films on glass and quartz plates were obtained by the chemical vapour deposition using Ti(dpm)2(Opri)2complex compound (CC-CVD method) in a standard vacuum apparatus at 1.2–2.0 × 10-4 mbar. The substrate temperature was stabilised in the range of 450–600∘C. The growth rate varied from several nanometres to several dozen of nanometres per minute. Structural information onTiO2thin films was obtained from synchrotron radiation experiments. High-resolution grazing incidence X-ray diffraction (GIXRD) experiments were performed at the high-resolution powder diffractometer at the DE
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16

Maurerlehner, Paul, Stefan Schoder, Sebastian Floss, et al. "Validation setup for the investigation of aeroacoustic and vibroacoustic sound emission of confined turbulent flows." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 263, no. 6 (2021): 519–25. http://dx.doi.org/10.3397/in-2021-1498.

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Confined flows induce sound at certain flow conditions, which can be annoying in electric vehicles due to the absence of combustion noise. Noise in internal flow may occur due to unfavorable flow-guiding geometries caused by the complex packaging required in engine compartments of modern vehicles. The flow-induced sound is emitted at duct openings (e.g., ventilation inside the passenger cabin). It also originates from the vibroacoustic emissions of the flow-guiding structure excited by the flow. We propose a modular validation procedure for aeroacoustic simulations of confined flows. The exper
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17

Pallapatisaidulu and Rajeev Kumar. "Radiation Absorption on Non- Newtonian Fluid over A Vertical Plate with Radiation Heat Flux." Journal of Biomedical and Pharmaceutical Research 12, no. 4 (2023): 36–41. http://dx.doi.org/10.32553/jbpr.v12i4.1017.

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The study of radiation absorption in non-Newtonian fluids flowing over a vertical plate subjected to radiation heat flux is a complex yet critical area of research that finds wide applications in engineering, physics, and environmental sciences. In this investigation, we explore the intricate interplay between radiation heat transfer, the unique rheological properties of non-Newtonian fluids, and the resulting fluid dynamics and heat transfer phenomena. Non-Newtonian fluids, characterized by their nonlinear relationship between shear stress and shear rate, exhibit behavior that deviates from t
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18

Jyoti, D. K., V. Nagaradhika, P. B. Sampath Kumar, and Ali J. Chamkha. "Nonlinear Convection and Radiative Heat Transfer in Kerosene-Alumina Nanofluid Flow Between Two Parallel Plates with Variable Viscosity." Journal of Nanofluids 13, no. 5 (2024): 1055–62. https://doi.org/10.1166/jon.2024.2193.

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This research looks at the flow of a kerosene-alumina nanofluid in a nonlinear convection model including two parallel vertical plates. Variable viscosity, a magnetic field, nonlinear radiation, and heat sources that rely on temperature are all part of the inquiry. Reduces complex nonlinear partial differential equations to ordinary differential equations. The governing problem’s numerical solution was derived from the Runge-Kutta-Fehlberg algorithm. The analysis explores various fluid flow characteristics across a range of relevant parameters, with results illustrated through graphs and table
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19

Fedosenko, V. S., M. M. Iji, A. A. Lozovenko, and G. G. Gorokh. "Bismuth Oxide-based Matrix Nanosystems for X-ray Contrast Diagnostics and Protection from Ionizing Radiation." Doklady BGUIR 21, no. 1 (2023): 89–93. http://dx.doi.org/10.35596/1729-7648-2023-21-1-89-93.

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The features of the bismuth oxide deposition by the ion layering method on matrices of anodic alumina and anodic titania have been studied. The formed nanostructured systems have been studied by means of electron micros copy, X-ray microanalysis, and X-ray spectroscopy. Two-layer nanocomposites consist of porous matrix or TiO2 island film with vertically oriented Bi2O3 plates placed on the surface. The photoluminescence spectrum of Al2O3/Bi2O3 oxide structure contains two photoluminescence channels with peaks at 460 and 560 nm upon excitation at 345 nm. Analysis of the EDX spectra showed that
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20

Khan, Umar, Adnan Abbasi, Naveed Ahmed, and Syed Tauseef Mohyud-Din. "Particle shape, thermal radiations, viscous dissipation and joule heating effects on flow of magneto-nanofluid in a rotating system." Engineering Computations 34, no. 8 (2017): 2479–98. http://dx.doi.org/10.1108/ec-04-2017-0149.

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Purpose The purpose of this paper is to explore the impact of thermal radiation, viscous dissipation and Joule heating effects on the flow of a magneto-nanofluid between two horizontally placed plates. Three distinct shapes of nanoparticles in a base fluid (water) are considered to compose the nanofluid. Design/methodology/approach Introducing feasible similarity variables, the flow model is transformed into a nonlinear and coupled system of ordinary differential equations. The consequent system is solved by using homotopy analysis method. Findings Furthermore, the influence of embedded parame
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21

Trebukhov, Sergey, Valeriy Volodin, Alina Nitsenko, et al. "Dearsenation of Gold-Bearing Composite Concentrates without Forced Displacement in a Sublimator." Journal of Composites Science 7, no. 9 (2023): 378. http://dx.doi.org/10.3390/jcs7090378.

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The primary devices for extracting volatile components from dispersed materials in a vacuum are devices with the movement of raw materials by directed vibrations. During the analysis of the operation of such installations, some shortcomings were identified, due to the supply of heat flow to the processed raw material and the requirements for the choice of structural materials. In this article, the authors tested a heating method and a design of a sublimator with the supply of heat flow to the dispersed material by radiation from the heater. The sublimation zone is made in the form of a shaft f
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22

Varun, Kumar, G. Manikandan, Kanna Rajesh, and Venkata Poluru. "Experimental analysis of solar air heater using polygonal ribs in absorber plate integrated with phase change material." Thermal Science, no. 00 (2021): 345. http://dx.doi.org/10.2298/tsci210518345v.

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Heat transfer enhancement in Solar Air Heater (SAH) has been investigated by implementing rough surfaces in the absorber plate. We use paraffin wax is used as Phase Change Material (PCM) integrated with SAH as a Thermal Energy Storage (TES) system. A maximum convective heat transfer is attained during the daytime and retained as latent heat (LH) to discharge heat during OFF radiation. In this investigation, two types of absorber plates were employed such as flat &amp; polygonal-shaped ribs at the test section. Further to investigate the heat transfer enhancement, the research was conducted wit
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23

Seiboth, Frank, Dennis Brückner, Maik Kahnt, et al. "Hard X-ray wavefront correction via refractive phase plates made by additive and subtractive fabrication techniques." Journal of Synchrotron Radiation 27, no. 5 (2020): 1121–30. http://dx.doi.org/10.1107/s1600577520007900.

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Modern subtractive and additive manufacturing techniques present new avenues for X-ray optics with complex shapes and patterns. Refractive phase plates acting as glasses for X-ray optics have been fabricated, and spherical aberration in refractive X-ray lenses made from beryllium has been successfully corrected. A diamond phase plate made by femtosecond laser ablation was found to improve the Strehl ratio of a lens stack with a numerical aperture (NA) of 0.88 × 10−3 at 8.2 keV from 0.1 to 0.7. A polymer phase plate made by additive printing achieved an increase in the Strehl ratio of a lens st
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24

Hua, Mengbo, and Siyuan He. "Efficient EM Scattering Modeling from Metal Targets Coated with Anisotropic Thin Layers." Electronics 13, no. 3 (2024): 536. http://dx.doi.org/10.3390/electronics13030536.

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To address the challenges posed by composite targets composed of an anisotropic medium and metal in electromagnetic (EM) scattering calculations, this paper introduces an innovative hybrid algorithm tailored for simulating the EM scattering characteristics of such complex targets. Utilizing impedance boundary condition (IBC), the method employs surface impedance vectors to precisely depict the EM properties of the medium. By harnessing the distinct advantages of the Method of Moments (MoMs) at low frequency and Physical Optics (POs) at high frequency, the algorithm ensures both accuracy and ef
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25

Majure, Lucas C., Yuley Encarnación, Teodoro Clase, Brígido Peguero, Kelly Ho, and Duniel Barrios. "Phylogenetics of Leptocereus (Cactaceae) on Hispaniola: clarifying species limits in the L. weingartianus complex and a new species from the Sierra de Bahoruco." PhytoKeys 172 (January 29, 2021): 17–37. http://dx.doi.org/10.3897/phytokeys.172.59497.

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The Antillean genus Leptocereus represents an in-situ radiation among the Greater and Lesser Antilles of 19 currently recognized species. Extensive fieldwork carried out in the Dominican Republic over recent years has revealed that the species limits of Leptocereus of Hispaniola are more complex than previously thought. There are four currently recognized species that occur on the island, L. demissus, L. paniculatus, L. undulosus and L. weingartianus. We evaluate species limits in this group based on DNA sequence data and phylogenetic analysis, morphological characters and a survey of herbariu
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26

Majure, Lucas C., Yuley Encarnación, Teodoro Clase, Brígido Peguero, Kelly Ho, and Duniel Barrios. "Phylogenetics of Leptocereus (Cactaceae) on Hispaniola: clarifying species limits in the L. weingartianus complex and a new species from the Sierra de Bahoruco." PhytoKeys 172 (January 29, 2021): 17–37. https://doi.org/10.3897/phytokeys.172.59497.

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The Antillean genus Leptocereus represents an in-situ radiation among the Greater and Lesser Antilles of 19 currently recognized species. Extensive fieldwork carried out in the Dominican Republic over recent years has revealed that the species limits of Leptocereus of Hispaniola are more complex than previously thought. There are four currently recognized species that occur on the island, L. demissus, L. paniculatus, L. undulosus and L. weingartianus. We evaluate species limits in this group based on DNA sequence data and phylogenetic analysis, morphological characters and a survey of herbariu
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27

Azhagar, Arunagiri, Kunio Hayakawa, Hiroo Shizuka, and Katsuhiko Sakai. "Influence of Tool pin Profiles in Friction Stir Welding of Aluminum Alloy and Polycarbonate." Defect and Diffusion Forum 414 (February 24, 2022): 185–90. http://dx.doi.org/10.4028/p-ohtn3n.

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In this study, the impact of tool pin profile on the dissimilar joining characteristics of aluminum alloy AA2017 and polycarbonate in friction stir welding (FSW) was examined. The tool pins made of SKD11 tool steel were used in the experiments of the FSW to join AA2017 and polycarbonate plates in a butt configuration at a tool rotation speed of 1320 and 1760 rpm and tool transverse speed of 60 mm/min. The tool shoulder diameter and tool pin height were set to 10 mm and 2 mm. The shapes of tool pin were cylindrical with and without groove, tapered cylindrical with and without groove, bobbin sha
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28

Wang, Jun, Jason Hilton, Hermann W. Pfefferkorn, et al. "Ancient noeggerathialean reveals the seed plant sister group diversified alongside the primary seed plant radiation." Proceedings of the National Academy of Sciences 118, no. 11 (2021): e2013442118. http://dx.doi.org/10.1073/pnas.2013442118.

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Noeggerathiales are enigmatic plants that existed during Carboniferous and Permian times, ∼323 to 252 Mya. Although their morphology, diversity, and distribution are well known, their systematic affinity remained enigmatic because their anatomy was unknown. Here, we report from a 298-My-old volcanic ash deposit, an in situ, complete, anatomically preserved noeggerathialean. The plant resolves the group’s affinity and places it in a key evolutionary position within the seed plant sister group. Paratingia wuhaia sp. nov. is a small tree producing gymnospermous wood with a crown of pinnate, compo
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29

Sutton, S. R., P. E. Eng, M. L. Rivers, and M. Newville. "Spatially-Resolved X-Ray Absorption fine Structure (XAFS) Spectroscopy Using Undulator Radiation Focused by Dynamically-Bent Elliptical Mirrors." Microscopy and Microanalysis 4, S2 (1998): 364–65. http://dx.doi.org/10.1017/s1431927600021942.

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X-ray absorption spectroscopy (XANES and EXAFS) applied with x-ray microprobe instrumentation (figures 1) can be used for studying the electronic structure of specific elements in complex materials in a spatially-resolved manner (figure 2). Such techniques are valuable in a wide range of studies including hydrothermal fluid processes, migration and encapsulation of toxic and radioactive wastes, and redox evolution of solar system bodies.One of the major technical challenges in this work is the production of high flux microbeams from high power, hard x-ray synchrotron sources. Some of the micro
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30

Razdobarin, A. G., Y. R. Shubin, A. A. Belokur, et al. "Conceptual Project for Diagnostics of Erosion of the First Wall and Divertor of the Tokamak with Reactor Technologies TRT." Fizika plazmy 50, no. 4 (2024): 409–26. http://dx.doi.org/10.31857/s0367292124040042.

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A conceptual design for diagnosing erosion of the first wall and divertor plates of a tokamak with reactor technologies TRT is proposed. The principles of constructing a diagnostic complex based on the following systems are developed: laser radar, dual-wavelength digital holographic interferometry and active laser IR thermography. An optical scheme is developed for combining the optical paths to input laser radiation and collect scattered light from diagnostic systems. To view the maximum area of the first wall, a scheme for optical scanning of the surface of the first wall and divertor is pro
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31

Minina, V. I., Yu A. Nelyubova, Ya A. Savchenko, et al. "Estimation of chromosome disorders in workers at coal thermal power plant." Russian Journal of Occupational Health and Industrial Ecology, no. 3 (March 31, 2019): 149–54. http://dx.doi.org/10.31089/1026-9428-2019-3-149-154.

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Introduction. Coal heat power stations are characterized by severe hazardous eff ect of occupational environment on workers. Objective. To analyze chromosomal disorders in workers of thermal power plant working on coal from Kuznetsk coal fi eld (West Siberia). Materials and methods. Th e authors studied level and specter of chromosomal aberrations in blood lymphocytes of 185 workers of Kemerovo thermal power plant and 218 inhabitants of the same location, not working on industrial enterprises (Kemerovo, Russia). For every individual, average number of 200 metaphase plates of high quality was a
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32

Sanchez-Weatherby, Juan, James Sandy, Halina Mikolajek, et al. "VMXi: a fully automated, fully remote, high-flux in situ macromolecular crystallography beamline." Journal of Synchrotron Radiation 26, no. 1 (2019): 291–301. http://dx.doi.org/10.1107/s1600577518015114.

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VMXi is a new high-flux microfocus macromolecular crystallography beamline at Diamond Light Source. The beamline, dedicated to fully automated and fully remote data collection of macromolecular crystals in situ, allows rapid screening of hundreds of crystallization plates from multiple user groups. Its main purpose is to give fast feedback at the complex stages of crystallization and crystal optimization, but it also enables data collection of small and delicate samples that are particularly difficult to harvest using conventional cryo-methods, crystals grown in the lipidic cubic phase, and al
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33

Yu, Jack C., Steven R. Buchman, Arun K. Gosain, et al. "Basic Biomechanics for Craniofacial Surgeons: The Responses of Alloplastic Materials and Living Tissues to Mechanical Forces." FACE 2, no. 4 (2021): 446–61. http://dx.doi.org/10.1177/27325016211060232.

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Many terms such as twist, compress, bend, and stretch, describe how materials behave when subjected to mechanical stresses. Subjective adjectives to describe the property of materials such as hard or brittle are imprecise and impedes proper understanding of important principles needed in planning and performing surgical treatments. The viability of tissue and time dependent variables effect healing and compound the issue. Some parameters are time dependent (strain rate), while others are nearly independent of time (Young’s modulus). The craniofacial skeleton and enveloping soft tissues are vis
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34

Zanarini, Alessandro. "Attempts at Pseudo-Inverse Vibro-Acoustics by Means of SLDV-Based Full-Field Mobilities." Machines 13, no. 4 (2025): 324. https://doi.org/10.3390/machines13040324.

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Lightweight components can have structural integrity and reliability concerns, coming from dynamic airborne pressure fields. Hardly tuned numerical structural models may enter into vibro-acoustic simulations of the pressure fields radiated by vibrating plates, potentially masking the forecast of severe outputs. Instead, this paper proposes—for the direct and inverse vibro-acoustic approaches—to characterise the broad frequency band structural dynamics of radiating surfaces by means of experiment-based full-field contactless techniques, with increased spatial resolution, but without the inertia
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35

Souza, Gabriela Barreto, Mateus Da Silva Izaguirry, Igor da Rocha Lazzarotto, and Thiago Victorino Claus. "Recent Advances in the Use of Cone Beam Computed Tomography (CBCT) in the Diagnosis and Therapeutic Planning of Oral and Maxillofacial Trauma." Current Journal of Applied Science and Technology 44, no. 7 (2025): 69–79. https://doi.org/10.9734/cjast/2025/v44i74574.

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This study explored the use of Cone Beam Computed Tomography (CBCT) in the evaluation of traumatic lesions in the oral and maxillofacial region, especially in impacted and supernumerary teeth. The research was conducted through a systematic review of scientific articles, selected from a search in DECS descriptors and the PubMed database, resulting in 10 articles that met the inclusion criteria. The results highlight CBCT as a superior imaging modality, capable of generating detailed three-dimensional images with lower radiation dose and high spatial resolution. This technology has proven cruci
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36

Zhang, Han-hao, Pei-zhi Wang, Shuanhai He, Yuan Li, Ke-fan Chen, and Nan-nan Sun. "Research of Thermal Effect of Cable-Stayed Bridge with a Separated Side-Box Steel-Concrete Composite Girder under Solar Radiation." Advances in Civil Engineering 2021 (April 5, 2021): 1–17. http://dx.doi.org/10.1155/2021/8812687.

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At present, there are few studies on the thermal effect of solar radiation on a separated double-sided box steel-concrete composite girder cable-stayed bridge. In this paper, the beam element and mixed element models are combined with the theory of transient heat transfer analysis and meteorology; this approach is adopted to carry out a thermodynamic analysis of a related bridge project. The calculation results of the thermal field and structural thermodynamic analysis of bridge sections show that, in terms of a separated double-sided box steel-concrete composite girder cable-stayed bridge, th
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37

van Diedenhoven, B., B. Cairns, A. M. Fridlind, A. S. Ackerman, and T. J. Garrett. "Remote sensing of ice crystal asymmetry parameter using multi-directional polarization measurements – Part 2: Application to the Research Scanning Polarimeter." Atmospheric Chemistry and Physics Discussions 12, no. 12 (2012): 32063–107. http://dx.doi.org/10.5194/acpd-12-32063-2012.

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Abstract. A new method to retrieve ice cloud asymmetry parameters from multi-directional polarized reflectance measurements is applied to measurements of the airborne Research Scanning Polarimeter (RSP) obtained during the CRYSTAL-FACE campaign in 2002. The method assumes individual hexagonal ice columns and plates serve as proxies for more complex shapes and aggregates. The closest fit is searched in a look-up table of simulated polarized reflectances computed for cloud layers that contain individual, randomly oriented hexagonal columns and plates with a virtually continuous selection of aspe
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38

van Diedenhoven, B., B. Cairns, A. M. Fridlind, A. S. Ackerman, and T. J. Garrett. "Remote sensing of ice crystal asymmetry parameter using multi-directional polarization measurements – Part 2: Application to the Research Scanning Polarimeter." Atmospheric Chemistry and Physics 13, no. 6 (2013): 3185–203. http://dx.doi.org/10.5194/acp-13-3185-2013.

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Abstract. A new method to retrieve ice cloud asymmetry parameters from multi-directional polarized reflectance measurements is applied to measurements of the airborne Research Scanning Polarimeter (RSP) obtained during the CRYSTAL-FACE campaign in 2002. The method assumes individual hexagonal ice columns and plates serve as proxies for more complex shapes and aggregates. The closest fit is searched in a look-up table of simulated polarized reflectances computed for cloud layers that contain individual, randomly oriented hexagonal columns and plates with a virtually continuous selection of aspe
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39

Bushmina, E., A. Bulavskaya, A. Grigorieva, I. Miloichikova, V. Saburov, and S. Stuchebrov. "Compressing of experimental and simulated results of electron beam interaction with FFF-printed samples." Journal of Instrumentation 19, no. 05 (2024): C05041. http://dx.doi.org/10.1088/1748-0221/19/05/c05041.

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Abstract One of the important parameters characterizing the interaction of electron beams with matter is the depth dose distribution. To develop a new approach for shaping electron beams using specially created materials suitable for the manufacture of complex 3D-printed devices, it is necessary to analyze the features of ionizing radiation propagation. In this work, numerical simulations and experimental studies of the interaction between electron beams and plastic materials weighted with metallic impurities of different concentrations, suitable for fabricating samples using the rapid prototy
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40

Rinaldi, Arief, Yenniwarti Rafsyam, and Jonifan Jonifan. "SIMULASI ANTENA MIKROSTRIP RECTANGULAR PATCH ARRAY 1X2 UNTUK ACCESS POINT TP-LINK FREKUENSI 2.4 GHz." Orbith: Majalah Ilmiah Pengembangan Rekayasa dan Sosial 18, no. 3 (2023): 279–86. https://doi.org/10.32497/orbith.v18i3.4372.

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Antena mikrostrip merupakan antena kecil berbentuk lempengan yang dapat dibuat dari plat PCB yang terdiri atas tiga elemen, yaitu paradiasi (radiator), elemen substrat (substrate) dan elemen pertanahan (ground). Antena berfungsi untuk memberikan akses internet pada jaringan lokal yang terhubung dengan access point TP-link untuk proses transmisi data. Antena yang digunakan pada access point merupakan antena mikrostrip rectangular patch array 1x2 yang bekerja pada frekuensi 2.4 GHz, dirancang menggunakan software CST 2019. Hasil simulasi antena untuk parameter return loss menunjukkan nilai sebes
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41

Döring, Florian, Marcel Risch, Benedikt Rösner, et al. "A zone-plate-based two-color spectrometer for indirect X-ray absorption spectroscopy." Journal of Synchrotron Radiation 26, no. 4 (2019): 1266–71. http://dx.doi.org/10.1107/s1600577519003898.

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X-ray absorption spectroscopy (XAS) is a powerful element-specific technique that allows the study of structural and chemical properties of matter. Often an indirect method is used to access the X-ray absorption (XA). This work demonstrates a new XAS implementation that is based on off-axis transmission Fresnel zone plates to obtain the XA spectrum of La0.6Sr0.4MnO3 by analysis of three emission lines simultaneously at the detector, namely the O 2p–1s, Mn 3s–2p and Mn 3d–2p transitions. This scheme allows the simultaneous measurement of an integrated total fluorescence yield and the partial fl
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42

Bassim, M. Nabil, S. Boakye-Yiadom, and Manon Bolduc. "Microstructural Evolution from Shaped Charge through Steel Plates." Applied Mechanics and Materials 566 (June 2014): 344–49. http://dx.doi.org/10.4028/www.scientific.net/amm.566.344.

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A set of 18 armour steel plates were stacked on top of each other and subjected to shape charges that went through the plates and created a hole that decreased in diameter as it went through consecutive plates. Afterwards, the plates were examined and the hardness near the hole and away from the hole was taken to determine the effect of the passing of the shaped charge through the plates. Also, specimens from the walls of the holes were taken to determine changes in the microstructure due to the shock wave and the resulting excessive heating from the shape charge. It was observed that the shoc
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43

Taratorin, Andrey, and Ainur Mukhametov. "OPTIMIZATION OF COMPLEXLY SHAPED DISSIPATIVE SILENCERS." VOLUME 39, VOLUME 39 (2021): 94. http://dx.doi.org/10.36336/akustika20213994.

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The article is about a comprehensive study of dissipative silencers of complex shapes. Analyzed the acoustic efficiency of such silencers. The sound absorption coefficient determined from experimental data. The acoustic properties of plate silencers take into account that coefficient. Presented the results of verification of models with plates of constant thickness. Considered the plates of complex shapes: uniform thickness change, convex and concave. Obtained results of modeling the acoustic efficiency of silencers with complex shape plates. These results are for different values of the mean
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44

Paterson, N., A. Tawn, K. Williams, and A. D. Nurse. "On the numerical modelling of laser shearing of glass sheets used to optimize production methods." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 218, no. 1 (2004): 1–11. http://dx.doi.org/10.1243/095440604322786901.

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The problem of the control of the propagating crack tip during laser shearing (or zero width laser cutting of glass) is essentially one of controlling the stress field within the substrate. The glass substrate is stressed thermally using surface absorption of 10.6 μm laser radiation followed by cooling, in this case from a fine atomized waterjet. The stresses created in a large sheet, combined with the residual stresses within the glass substrate, are sufficient to propagate a subsurface flaw to form a controlled crack that gives excellent cut quality. This process has previously been studied
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45

ABRAMOV, S., D. BRINKEVICH, V. PROSOLOVICH, et al. "FILMS OF THE NEGATIVE PHOTORESIST AZ nLOF 5510, IRRADIATED BY ELECTRONS." HERALD OF POLOTSK STATE UNIVERSITY. Series С FUNDAMENTAL SCIENCES, no. 1 (April 18, 2025): 39–46. https://doi.org/10.52928/2070-1624-2025-44-1-39-46.

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The method of IR-spectroscopy using a module for diffuse reflection, the films of negative photoresists AZ nLOF 5510 thick of 0,99 μm, applied to the surface of the silicon plates by centrifugation, were studied. Electron irradiation with an energy of 3,5 MeV dose to 7∙1016 cm-2 was carried out on ELU-4 linear accelerator of electrons. It is shown that the carbon-hydrogen bonds of the main component of the photoresist – phenol-formaldehyde resin - are stable up to doses ~ (1–3)∙1016 cm-2. The bands associated with the solvent disappear from the spectrum at doses of irradiation &lt; 1∙1015 cm-2
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46

Onanko, Yurii Anatoliyovich, Dmytro Volodymyrovych Charnyi, Anatoliy Petrovich Onanko, et al. "(Digital Presentation) Internal Friction, Mechanical Spectroscopy in SiO2/Si Wafers." ECS Meeting Abstracts MA2023-01, no. 29 (2023): 1796. http://dx.doi.org/10.1149/ma2023-01291796mtgabs.

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Introduction The electrophysical properties of semiconductor devices significantly depend on the perfection of their structure. It is necessary to control the structure of semiconductor wafer-plates disks in the manufacture of large integrated circuits (LIC). Technique was developed and device was made that allows to obtain the information about structural defects in such disks by attenuating elastic oscillations Q-1 to study the defects density nd and the depth hd of their propagation. Defect annealing leads to change in the shape of internal friction (IF) temperature spectrum Q-1(T) [1]. IF
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47

Teslyuk, O. I., S. V. Beltyukova, and O. O. Liventsova. "SORPTION-LUMINESCENT DETERMINATION OF MARKS OF TEA PRODUCTS QUALITY." Odesa National University Herald. Chemistry 29, no. 2(88) (2024): 142–55. https://doi.org/10.18524/2304-0947.2024.2(88).322137.

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Natural organic polyphenolic compounds are essential components of the diet. Determination of the presence and amount of dominant phenolic and polyphenolic components in food objects allows to assess the quality of products, which is important in food expertise. Luminescent sensors based on Ln(III) ion complexes are widely used for the highly sensitive determination of biologically active substances. The spectral and luminescent properties of polyphenolic substances – catechols, which are quality markers of tea products, have been studied. The diversity of isomers and the similarity of the str
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48

Iqbal, Amjad, Amor Smida, Nazih Mallat, Mohammad Islam, and Sunghwan Kim. "A Compact UWB Antenna with Independently Controllable Notch Bands." Sensors 19, no. 6 (2019): 1411. http://dx.doi.org/10.3390/s19061411.

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A minimally-sized, triple-notched band ultra-wideband (UWB) antenna, useful for many applications, is designed, analyzed, and experimentally validated in this paper. A modified maple leaf-shaped main radiating element with partial ground is used in the proposed design. An E-shaped resonator, meandered slot, and U-shaped slot are implemented in the proposed design to block the co-existing bands. The E-shaped resonator stops frequencies ranging from 1.8–2.3 GHz (Advanced Wireless System (AWS1–AWS2) band), while the meandered slot blocks frequencies from 3.2–3.8 GHz (WiMAX band). The co-existing
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49

Pauly, Hans. "Columnar and radiating aggregates with jarlite from the Ivigtut cryolite deposit, South Greenland." Bulletin of the Geological Society of Denmark 40 (December 30, 1993): 272–79. http://dx.doi.org/10.37570/bgsd-1993-40-12.

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Most jarlite in the Ivigtut cryolite deposit occurred as cm-sized segregations in fluorite-carrying masses. The conspicuous columnar and radiating aggregates with jarlite occurred only in five places in the quarry. They are composed of mm-wide, dm-long lamellae either in a radiating pattern or in a more or less parallel arrange­ment. The major constituent of the lamellae is jarlite in fan-shaped grains 0.2-1 mm long. They are delineated by seams, a few tenths of a mm wide, of cryptocrystalline topaz and a spherulitic mica which show straight borders towards the jarlite. The lamellae are prisma
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50

Sigal, S. H., S. Brill, A. S. Fiorino, and L. M. Reid. "The liver as a stem cell and lineage system." American Journal of Physiology-Gastrointestinal and Liver Physiology 263, no. 2 (1992): G139—G148. http://dx.doi.org/10.1152/ajpgi.1992.263.2.g139.

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We propose that the liver is a stem cell and lineage system with many parallels to lineages in the bone marrow, gut, and epidermis, varying from them only in kinetics. All are organized with three compartments: a slow cycling stem cell compartment with cells expressing a fetal phenotype and responding slowly to injury; an amplification compartment with cells of intermediate phenotype rapidly proliferating in response to regenerative stimuli or acute injuries; and a terminal differentiation compartment in which cells increasingly differentiate and gradually lose their ability to divide. In all
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