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Journal articles on the topic 'Ghost resonance'

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Author: Grafiati

Published: 10 December 2022

Last updated: 28 January 2023

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1

Abirami, K., S. Rajasekar, and M. A. F. Sanjuan. "Vibrational and Ghost-Vibrational Resonances in a Modified Chua's Circuit Model Equation." International Journal of Bifurcation and Chaos 24, no. 11 (November 2014): 1430031. http://dx.doi.org/10.1142/s0218127414300316.

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The role of the number of breakpoints N in the sawtooth form of the characteristic function in the modified Chua's circuit model equation on vibrational and ghost-vibrational resonances is investigated in this paper. To observe vibrational resonance, the system should be driven by two periodic forces of frequencies ω and Ω, with Ω ≫ ω. Resonance occurs at the frequency ω when the amplitude of the high-frequency force is varied. When the system is subjected to an input signal containing multifrequencies which are of higher-order than a certain (missing) fundamental frequency, then a resonance at the missing fundamental frequency is induced by the high-frequency input signal and is called ghost-vibrational resonance. In both types of resonances, the number of resonances is N and hysteresis occurs in each resonance region. There are some similarities and differences in these two resonance phenomena. We report in detail the influence of the role of number of breakpoints N on the features of vibrational and ghost-vibrational resonances.

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2

Rajamani, S., S. Rajasekar, and M. A. F. Sanjuán. "Ghost-vibrational resonance." Communications in Nonlinear Science and Numerical Simulation 19, no. 11 (November 2014): 4003–12. http://dx.doi.org/10.1016/j.cnsns.2014.04.006.

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3

Koktzoglou, Ioannis, and Robert R. Edelman. "Ghost magnetic resonance angiography." Magnetic Resonance in Medicine 61, no. 6 (June 2009): 1515–19. http://dx.doi.org/10.1002/mrm.21943.

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4

Karkazis, Katrina, and Rebecca Jordan-Young. "Sensing Race as a Ghost Variable in Science, Technology, and Medicine." Science, Technology, & Human Values 45, no. 5 (July 27, 2020): 763–78. http://dx.doi.org/10.1177/0162243920939306.

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Ghost variables are variables in program languages that do not correspond to physical entities. This special issue, based on a panel on “Race as a Ghost Variable” at the 2017 Meeting of the Society for Social Studies of Science, traces ideas of “race” in particular niches of science, technology, and medicine where it is submerged and disavowed, yet wields power. Each paper is a case study exploring ghosts that emerge through the resonance among things as heterogeneous as hair patterns, hormone levels, food tastes, drug use, clinic locations, proximity to disaster, job classifications, and social belonging and suspicion, all of which vibrate with meanings accumulated over long racial histories. Together, the papers further elaborate methods and analytic models for identifying the operations of race—the relations and processes that make it, the effects that it has. A chief appeal of the metaphor of the ghost is that it brings the importance of history to the fore. Ghosts are simultaneously history and the present, not just an accretion of earlier experiences, but the palimpsest left when one tries to erase them. Sometimes faint and hard to discern, sometimes rambunctious and disruptive, ghosts refuse our attempts to simply move on.

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5

CALVO, OSCAR, and DANTE R. CHIALVO. "GHOST STOCHASTIC RESONANCE IN AN ELECTRONIC CIRCUIT." International Journal of Bifurcation and Chaos 16, no. 03 (March 2006): 731–35. http://dx.doi.org/10.1142/s0218127406015106.

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We demonstrate experimentally the regime of ghost stochastic resonance in the response of a Monostable Schmit Trigger electronic circuit driven by noise and signals with N frequency components: kf0+Δf, (k+1)f0+Δf,…, k+nf0+Δf where k is an integer greater than one. It is verified that stochastic resonance occurs at the frequency fr = f0 + (Δf/(k+(N-1)/2)), as predicted in the theory. At the frequency for which the resonance is maximum there is no input energy, and thus this form is called "ghost" stochastic resonance.

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6

Bordet, M., S. Morfu, and P. Marquié. "Ghost stochastic resonance in FitzHugh–Nagumo circuit." Electronics Letters 50, no. 12 (June 2014): 861–62. http://dx.doi.org/10.1049/el.2014.0638.

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7

Johnson, Stephanie L. "CHRISTINA ROSSETTI'S GHOSTS, SOUL-SLEEP, AND VICTORIAN DEATH CULTURE." Victorian Literature and Culture 46, no. 2 (May 16, 2018): 381–402. http://dx.doi.org/10.1017/s1060150318000062.

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Ghosts haunt Christina Rossetti's poetry. Amidst the lyrics, devotional poems, and children's verse, poems about ghosts and hauntings recur as material evidence of Rossetti's fascination with spectral presences. That fascination poses a particular interpretive puzzle in light of her religious convictions and piety. We might be tempted to identify the recurring ghosts as just another nineteenth-century flirtation with spiritualism – the spiritualism by which her brothers William and Gabriel were intrigued, attending séances and testing the validity of communications from the dead. Rossetti, however, clearly dismissed spiritualism as false belief and a means to sin. We might also be tempted to divide Rossetti's poetry into the secular and the sacred and to categorize the ghost poems as the former, yet much recent criticism on Rossetti has argued successfully for the pervasiveness of her religious voice even in works that seem not to be religious. Finally, in seeking to hear a religious resonance, we might be tempted to interpret her ghosts as representative of the Holy Ghost, yet that interpretation could only be asserted at the expense of the poems themselves; as narrative poems, most of them involve ghosts of dead lovers, desired by the living for themselves – not as experiences of God's presence. Rossetti's use of ghosts within short narrative or dialogic poems of the late 1850s and 60s concerning human desire for lost love invites closer inspection, especially when such poems overtly treat her religious beliefs.

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8

Tala, A. F. Moyo, Y. J. Wadop Ngouongo, G. Djuidjé Kenmoé, and T. C. Kofané. "Ghost stochastic resonance in an asymmetric Duffing oscillator." Physica A: Statistical Mechanics and its Applications 582 (November 2021): 126247. http://dx.doi.org/10.1016/j.physa.2021.126247.

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9

Balenzuela, Pablo, Holger Braun, and Dante R. Chialvo. "The ghost of stochastic resonance: an introductory review." Contemporary Physics 53, no. 1 (January 2012): 17–38. http://dx.doi.org/10.1080/00107514.2011.639605.

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10

Buldú, Javier M., C. M. González, J. Trull, M. C. Torrent, and J. García-Ojalvo. "Coupling-mediated ghost resonance in mutually injected lasers." Chaos: An Interdisciplinary Journal of Nonlinear Science 15, no. 1 (March 2005): 013103. http://dx.doi.org/10.1063/1.1827412.

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11

Balenzuela, Pablo, Jordi Garcia-Ojalvo, Elías Manjarrez, Lourdes Martínez, and Claudio R. Mirasso. "Ghost resonance in a pool of heterogeneous neurons." Biosystems 89, no. 1-3 (May 2007): 166–72. http://dx.doi.org/10.1016/j.biosystems.2006.04.014.

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12

Xiang, Qing-San, and Ross Henkelman. "5363044 Motion ghost manipulation in magnetic resonance imaging." Magnetic Resonance Imaging 13, no. 5 (January 1995): XXIX. http://dx.doi.org/10.1016/0730-725x(95)98089-9.

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13

Buldú, J. M., D. R. Chialvo, C. R. Mirasso, M. C. Torrent, and J. García-Ojalvo. "Ghost resonance in a semiconductor laser with optical feedback." Europhysics Letters (EPL) 64, no. 2 (October 2003): 178–84. http://dx.doi.org/10.1209/epl/i2003-00285-3.

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14

Tsaftaris, Sotirios A., Erik Offerman, Robert R. Edelman, and Ioannis Koktzoglou. "Fully automated reconstruction of ungated ghost magnetic resonance angiograms." Journal of Magnetic Resonance Imaging 31, no. 3 (March 2010): 655–62. http://dx.doi.org/10.1002/jmri.22092.

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15

Usama, B. I., S. Morfu, and P. Marquie. "Vibrational resonance and ghost-vibrational resonance occurrence in Chua’s circuit models with specific nonlinearities." Chaos, Solitons & Fractals 153 (December 2021): 111515. http://dx.doi.org/10.1016/j.chaos.2021.111515.

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16

Gómez Flores, Víctor, Alejandro Martínez-Martínez, Jorge A. Roacho Pérez, Jazzely Acosta Bezada, Francisco S. Aguirre-Tostado, and Perla Elvia García Casillas. "Biointeraction of Erythrocyte Ghost Membranes with Gold Nanoparticles Fluorescents." Materials 14, no. 21 (October 25, 2021): 6390. http://dx.doi.org/10.3390/ma14216390.

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The application of new technologies for treatments against different diseases is increasingly innovative and effective. In the case of nanomedicine, the combination of nanoparticles with biological membranes consists of a “camouflage” technique, which improves biological interaction and minimizes the secondary effects caused by these remedies. In this work, gold nanoparticles synthesized by chemical reduction (Turkevich ≈13 nm) were conjugated with fluorescein isothiocyanate to amplify their optical properties. Fluorescent nanoparticles were deposited onto the surface of hemoglobin-free erythrocytes. Ghost erythrocytes were obtained from red blood cells by density gradient separation in a hypotonic medium and characterized with fluorescence, optical, and electron microscopy; the average size of erythrocyte ghosts was 9 µm. Results show that the functional groups of sodium citrate (COO-) and fluorophore (-N=C=S) adhere by electrostatic attraction to the surface of the hemoglobin-free erythrocyte membrane, forming the membrane–particle–fluorophore. These interactions can contribute to imaging applications, by increasing the sensitivity of measurement caused by surface plasmon resonance and fluorescence, in the context of biological membranes.

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17

Noguchi, Takuya, and Hiroyuki Torikai. "Ghost Stochastic Resonance From an Asynchronous Cellular Automaton Neuron Model." IEEE Transactions on Circuits and Systems II: Express Briefs 60, no. 2 (February 2013): 111–15. http://dx.doi.org/10.1109/tcsii.2012.2235015.

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18

Balenzuela, Pablo, and Jordi García-Ojalvo. "Neural mechanism for binaural pitch perception via ghost stochastic resonance." Chaos: An Interdisciplinary Journal of Nonlinear Science 15, no. 2 (June 2005): 023903. http://dx.doi.org/10.1063/1.1871612.

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19

Toop, David. "Sound Body: The Ghost of a Program." Leonardo Music Journal 15 (December 2005): 28–35. http://dx.doi.org/10.1162/lmj.2005.15.1.28.

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The author considers the importance of the voice as a transformative instrument in 20th-century art, particularly in relation to the tape recorder and digital audio technology. He examines his collaborative work with sound poet Bob Cobbing in the 1970s and compares this with a recent gallery installation created with artist John Latham. Research from the 1970s into acoustic voice masking and resonance is contrasted with the use of analog tape process-ing and the sonic potential of computer audio software programs both in studio work and in improvised performance. Finally, the author discusses the implications of these con-frontations between body and machine.

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20

von Hagens, Tona, Yevhen Polyhach, Muhammad Sajid, Adelheid Godt, and Gunnar Jeschke. "Suppression of ghost distances in multiple-spin double electron–electron resonance." Physical Chemistry Chemical Physics 15, no. 16 (2013): 5854. http://dx.doi.org/10.1039/c3cp44462g.

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21

Braun, H., P. Ditlevsen, and J. Kurths. "New measures of multimodality for the detection of a ghost stochastic resonance." Chaos: An Interdisciplinary Journal of Nonlinear Science 19, no. 4 (December 2009): 043132. http://dx.doi.org/10.1063/1.3274853.

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22

Volegov, P., L. Schultz, and M. Espy. "On a ghost artefact in ultra low field magnetic resonance relaxation imaging." Journal of Magnetic Resonance 243 (June 2014): 98–106. http://dx.doi.org/10.1016/j.jmr.2014.04.005.

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23

Khasanov, I. Sh, and L. A. Zykova. "Can the ghost imaging increase the lateral resolution of surface plasmon resonance microscopy?" Journal of Physics: Conference Series 1636 (September 2020): 012039. http://dx.doi.org/10.1088/1742-6596/1636/1/012039.

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24

Li, Hongye, Xiaofan Zhao, Binyu Rao, Meng Wang, Baiyi Wu, and Zefeng Wang. "Fabrication and Characterization of Line-by-Line Inscribed Tilted Fiber Bragg Gratings Using Femtosecond Laser." Sensors 21, no. 18 (September 17, 2021): 6237. http://dx.doi.org/10.3390/s21186237.

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In this paper, we studied the basic characteristics of tilted fiber Bragg gratings (TFBGs), inscribed line-by-line. Experimental results showed that if the TFBGs were located within different planes parallel to the fiber axis, the spectra performed differently. For 2°TFBG, if it was located near the central plane, the Bragg resonance was stronger than ghost mode resonance, and the order reversed if it was located near the boundary between core and cladding. As the tilted angle increased, the range of cladding mode resonance increased. When the tilted angle was larger than 12°, the birefringence effect was observed. Based on the birefringence phenomenon, torsion characteristics were experimentally studied; the sensitivity was about 0.025 dB/degree in the linear variation range. The harmonic order of TFBGs also affected the transmission spectrum. Leaky mode resonance was observed in the 8th order TFBG, and torsion (or polarization) influenced the spectrum of the 8th order TFBG. Our research represented the theory of line-by-line inscribed TFBGs and provided an inscription guidance for TFBGs.

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25

Khasanov, I. Sh. "Diagnostics of Thin Gradient Dielectric Coatings by Surface Plasmon Resonance Microscopy and Ghost Imaging." Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques 16, no. 6 (December 2022): 951–59. http://dx.doi.org/10.1134/s1027451022050068.

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26

Sichilongo, Kwenga F., and Bert C. Lynn. "Waveboard Artifacts Generate Ghost Resonances Consistent with Equations for Predicting Ion Motion in Commercial Quadrupole Ion Traps." European Journal of Mass Spectrometry 11, no. 1 (February 2005): 15–21. http://dx.doi.org/10.1255/ejms.711.

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Real-time experiments involving fragmentation of the precursor molecular ion of n-butylbenzene ( m/z 134) to produce product ions C7H+7 ( m/z 91) and C7H+8 ( m/z 92), were used to observe the motion of ions in a commercial quadrupole ion trap. Initially, ghost resonance peaks were observed for excitation of the precursor ion at qz values of 0.4 and 0.5 on the qz axis of the stability diagram. Further experiments involving the generation of two-dimensional contour plots confirmed that these ghost peaks, which were in agreement with mathematical equations describing the motion of ions in a quadrupole field, arose due to waveboard artifacts. Two-dimensional contour surface plots showed non-linear secular frequency canyons from a qz value of 0.5 to higher values corresponding with higher drive radio frequency (rf) voltages on the stability diagram. This observation confirmed that ions are subjected to non-linear effects in this mass scan range. The octapole and hexapole field lines were observed at qz values of 0.65 and 0.78, respectively.

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27

Dermott, Stanley F., Dan Li, and Apostolos A. Christou. "Dynamical constraints on the evolution of the inner asteroid belt and the sources of meteorites." Proceedings of the International Astronomical Union 15, S364 (October 2021): 1–19. http://dx.doi.org/10.1017/s174392132100140x.

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AbstractWe have shown that in the inner belt the loss of asteroids from the ν6 secular resonance and the 3:1 Jovian mean motion resonance accounts for the observation that the mean size of the asteroids increases with increasing orbital inclination. We have used that observation to constrain the Yarkovsky loss timescale and to show that the family asteroids are embedded in a background population of old ghost families. We argue that all the asteroids in the inner belt originated from a small number of asteroids and that the initial mass of the belt was similar to that of the present belt. We also show that the observed size frequency distribution of the Vesta asteroid family was determined by the action of Yarkovsky forces, and that the age of this family is comparable to the age of the solar system.

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28

Narimanov, Evgenii. "Ghost resonance in anisotropic materials: negative refractive index and evanescent field enhancement in lossless media." Advanced Photonics 1, no. 04 (August 23, 2019): 1. http://dx.doi.org/10.1117/1.ap.1.4.046003.

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29

Fezeu, G. J., I. S. Mokem Fokou, C. Nono Dueyou Buckjohn, M. Siewe Siewe, and C. Tchawoua. "Probabilistic analysis and ghost-stochastic resonance of a hybrid energy harvester under Gaussian White noise." Meccanica 55, no. 9 (July 16, 2020): 1679–91. http://dx.doi.org/10.1007/s11012-020-01204-3.

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30

Fezeu, G. J., I. S. Mokem Fokou, C. Nono Dueyou Buckjohn, M. Siewe Siewe, and C. Tchawoua. "Resistance induced P-bifurcation and Ghost-Stochastic resonance of a hybrid energy harvester under colored noise." Physica A: Statistical Mechanics and its Applications 557 (November 2020): 124857. http://dx.doi.org/10.1016/j.physa.2020.124857.

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31

Silva, Iacyel G., Osvaldo A. Rosso, Marcos V. D. Vermelho, and Marcelo L. Lyra. "Ghost stochastic resonance induced by a power-law distributed noise in the FitzHugh–Nagumo neuron model." Communications in Nonlinear Science and Numerical Simulation 22, no. 1-3 (May 2015): 641–49. http://dx.doi.org/10.1016/j.cnsns.2014.06.050.

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32

Yang, Hua, Greg G. Cook, and Martyn N. J. Paley. "Mapping of periodic waveforms using the ghost reconstructed alternating current estimation (GRACE) magnetic resonance imaging technique." Magnetic Resonance in Medicine 50, no. 3 (August 20, 2003): 633–37. http://dx.doi.org/10.1002/mrm.10573.

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33

Trotti, Enrico. "Emergence of ghost in once-subtracted on-shell unitarization in glueball-glueball scattering." EPJ Web of Conferences 274 (2022): 03005. http://dx.doi.org/10.1051/epjconf/202227403005.

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We investigate the scattering of two scalar glueballs in pure YM theory, using the well known dilaton potential. We perform the calculations considering a glueball mass of about mG ≈ 1.7 GeV, as predicted by lattice QCD. We begin with the tree-level theory, but the question about the presence of a bound state needs a deeper study to be answered. Thus we unitarize the theory through a self energy loop function consisting of a single subtraction at the single glueball resonance pole. We show that this choice is inconsistent as it leads to the emergence of a ghost-like state with negative norm. This problem is related with the sign of the coefficient in the first order term of the expansion of the reverse unitarized amplitude. We briefly discuss the solution which consists of an additional subtraction in the loop function, as presented in Eur.Phys.J.C 82 (2022) 5, 487.

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34

Toop, David. "The Mediumship of Listening: Notes on Sound in the Silent Arts." Journal of Visual Culture 10, no. 2 (August 2011): 169–76. http://dx.doi.org/10.1177/1470412911402887.

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This article is a series of excerpts from the author’s most recent book Sinister Resonance. It begins with the premise that sound is a haunting, a ghost, a presence whose location in space is ambiguous and whose existence in time is transitory. The intangibility of sound is uncanny – a phenomenal presence both in the head, at its point of source and all around, and never entirely distinct from auditory hallucinations. The close listener is like a medium who draws out substance from that which is not entirely there. The history of listening must be constructed from narratives of myth and fiction, silent arts such as painting, the resonance of architecture, auditory artefacts and nature. In such contexts, sound often functions as a metaphor for mystical revelation, instability, forbidden desires, disorder, formlessness, the unknown, unconscious and extra-human, a representation of immaterial worlds. Threaded through is Marcel Duchamp’s curious observation – ‘One can look at seeing but one can’t hear hearing’ – and his concept of the infra-thin, those human experiences so fugitive that they exist only in the imaginative absences of perception.

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35

Zhao, Ming, Yang Wei, Yu Lu, and Kelvin K. L. Wong. "A novel U-Net approach to segment the cardiac chamber in magnetic resonance images with ghost artifacts." Computer Methods and Programs in Biomedicine 196 (November 2020): 105623. http://dx.doi.org/10.1016/j.cmpb.2020.105623.

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36

Braun, H., A. Ganopolski, M. Christl, and D. R. Chialvo. "A simple conceptual model of abrupt glacial climate events." Nonlinear Processes in Geophysics 14, no. 6 (November 23, 2007): 709–21. http://dx.doi.org/10.5194/npg-14-709-2007.

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Abstract. Here we use a very simple conceptual model in an attempt to reduce essential parts of the complex nonlinearity of abrupt glacial climate changes (the so-called Dansgaard-Oeschger events) to a few simple principles, namely (i) the existence of two different climate states, (ii) a threshold process and (iii) an overshooting in the stability of the system at the start and the end of the events, which is followed by a millennial-scale relaxation. By comparison with a so-called Earth system model of intermediate complexity (CLIMBER-2), in which the events represent oscillations between two climate states corresponding to two fundamentally different modes of deep-water formation in the North Atlantic, we demonstrate that the conceptual model captures fundamental aspects of the nonlinearity of the events in that model. We use the conceptual model in order to reproduce and reanalyse nonlinear resonance mechanisms that were already suggested in order to explain the characteristic time scale of Dansgaard-Oeschger events. In doing so we identify a new form of stochastic resonance (i.e. an overshooting stochastic resonance) and provide the first explicitly reported manifestation of ghost resonance in a geosystem, i.e. of a mechanism which could be relevant for other systems with thresholds and with multiple states of operation. Our work enables us to explicitly simulate realistic probability measures of Dansgaard-Oeschger events (e.g. waiting time distributions, which are a prerequisite for statistical analyses on the regularity of the events by means of Monte-Carlo simulations). We thus think that our study is an important advance in order to develop more adequate methods to test the statistical significance and the origin of the proposed glacial 1470-year climate cycle.

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37

Mattéoli, Rémi, Joël Gilbert, Christophe Vergez, Jean-Pierre Dalmont, Sylvain Maugeais, Soizic Terrien, and Frédéric Ablitzer. "Minimal blowing pressure allowing periodic oscillations in a model of bass brass instruments." Acta Acustica 5 (2021): 57. http://dx.doi.org/10.1051/aacus/2021049.

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In this study, an acoustic resonator – a bass brass instrument – with multiple resonances coupled to an exciter – the player’s lips – with one resonance is modelled by a multidimensional dynamical system, and studied using a continuation and bifurcation software. Bifurcation diagrams are explored with respect to the blowing pressure, in particular with focus on the minimal blowing pressure allowing stable periodic oscillations and the associated frequency. The behaviour of the instrument is first studied close to a (non oscillating) equilibrium using linear stability analysis. This allows to determine the conditions at which an equilibrium destabilises and as such where oscillating regimes can emerge (corresponding to a sound production). This approach is useful to characterise the ease of playing of a brass instrument, which is assumed here to be related – as a first approximation – to the linear threshold pressure. In particular, the lower the threshold pressure, the lower the physical effort the player has to make to play a note [The Science of Brass Instruments. Springer-Verlag, 2021]. Cases are highlighted where periodic solutions in the bifurcation diagrams are reached for blowing pressures below the value given by the linear stability analysis. Thus, bifurcation diagrams allow a more in-depth analysis. Particular attention is devoted to the first playing regime of bass brass instruments (the pedal note and the ghost note of a tuba in particular), whose behaviour qualitatively differs from a trombone to a euphonium for instance.

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38

Oreskes, Naomi. "The fact of uncertainty, the uncertainty of facts and the cultural resonance of doubt." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 373, no. 2055 (November 28, 2015): 20140455. http://dx.doi.org/10.1098/rsta.2014.0455.

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Sixty years after industry executives first decided to fight the facts of tobacco, the exploitation of doubt and uncertainty as a defensive tactic has spread to a diverse set of industries and issues with an interest in challenging scientific evidence. However, one can find examples of doubt-mongering before tobacco. One involves the early history of electricity generation in the USA. In the 1920s, the American National Electric Light Association ran a major propaganda campaign against public sector electricity generation, focused on the insistence that privately generated electricity was cheaper and that public power generation was socialistic and therefore un-American. This campaign included advertisements, editorials (generally ghost-written), the rewriting of textbooks and the development of high school and college curricula designed to cast doubt on the cost-effectiveness of public electricity generation and extol the virtues of laissez-faire capitalism. It worked in large part by finding, cultivating and paying experts to endorse the industry’s claims in the mass media and the public debate, and to legitimatize the alterations to textbooks and curricula. The similarities between the electric industry strategy and the defence of tobacco, lead paint and fossil fuels suggests that these strategies work for reasons that are not specific to the particular technical claims under consideration. This paper argues that a reason for the cultural persistence of doubt is what we may label the ‘fact of uncertainty’. Uncertainty is intrinsic to science, and this creates vulnerabilities that interested parties may, and commonly do, exploit, both by attempting to challenge the specific conclusions of technical experts and by implying that those conclusions threaten other social values.

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39

Dameria, Flora, Marini Stephanie, Ening Krisnuhoni, Diah Rini Handjari, and Nur Rahadiani. "Liver Metastasis of Malignant Pilomatrixoma: Devastating Outcome from A Possibly Under-Treated Case." Indonesian Journal of Gastroenterology, Hepatology, and Digestive Endoscopy 21, no. 2 (September 30, 2020): 162–67. http://dx.doi.org/10.24871/2122020162-167.

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Malignant of pilomatrixoma, known as pilomatrix carcinoma, is a rare cutaneous adnexal tumor that derives from hair matrix cells.The tumor usually occurs in male, with the predominant age range between 40 to 60 years old, located in the head and neck area. The tumor consisted of atypical basaloid cells aggregation, ghost cells, and keratinous material. We report a case of 54 years old male patient referred to Cipto Mangunkusumo Hospital Jakarta with a mass in his right upper quadrant abdomen and a lump in the axilla. The magnitude resonance imaging (MRI) and positron emission tomography (PET)-scan revealed metastatic lesions in several lymph nodes and internal organs. The patient underwent liver biopsy which showed that tumor was composed of atypical basaloid cells, amyloid-like material, keratin mass, and was diagnosed as pilomatrix carcinoma. This case is being reported due to its rarity, potential pitfalls due to histologic similarity with several other entities, and to show the importance of histopathology examination in patient’s treatment to prevent a devastating outcome.

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40

Frases, Susana, Angela Salazar, Ekaterina Dadachova, and Arturo Casadevall. "Cryptococcus neoformans Can Utilize the Bacterial Melanin Precursor Homogentisic Acid for Fungal Melanogenesis." Applied and Environmental Microbiology 73, no. 2 (November 10, 2006): 615–21. http://dx.doi.org/10.1128/aem.01947-06.

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ABSTRACT Cryptococcus neoformans melanizes in the environment and in mammalian tissues, but the process of melanization in either venue is mysterious given that this microbe produces melanin only from exogenous substrates. Understanding the process of melanization is important because melanization is believed to protect against various stresses in the environment, including UV radiation, and pigment production is associated with virulence. Melanization in C. neoformans requires the availability of diphenolic precursors. In contrast, many bacteria synthesize melanin from homogentisic acid (HGA). We report that C. neoformans strains representing all four serotypes can produce a brown pigment from HGA. The brown pigment was acid resistant and had the electron paramagnetic resonance spectrum of a stable free radical, qualities that identified it as a melanin. Melanin “ghost”-like particles obtained from pigmented C. neoformans cells were hydrophobic, fluorescent under a variety of irradiation wavelengths, negatively charged, insoluble in organic solvents and alcohols, resistant to degradation by strong acids, and vulnerable to bleaching. HGA melanization was laccase dependent and repressed by high concentrations of glucose. The ability of C. neoformans to utilize a bacterial melanin precursor compound suggests a new substrate source for melanization in the environment.

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Cao, Yu, Xiuqin Su, Xueming Qian, Haitao Wang, Wei Hao, Meilin Xie, Xubin Feng, Junfeng Han, Mingliang Chen, and Chenglong Wang. "A Tracking Imaging Control Method for Dual-FSM 3D GISC LiDAR." Remote Sensing 14, no. 13 (July 1, 2022): 3167. http://dx.doi.org/10.3390/rs14133167.

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In this paper, a tracking and pointing control system with dual-FSM (fast steering mirror) composite axis is proposed. It is applied to the target-tracking accuracy control in a 3D GISC LiDAR (three-dimensional ghost imaging LiDAR via sparsity constraint) system. The tracking and pointing imaging control system of the dual-FSM 3D GISC LiDAR proposed in this paper is a staring imaging method with multiple measurements, which mainly solves the problem of high-resolution remote-sensing imaging of high-speed moving targets when the technology is transformed into practical applications. In the research of this control system, firstly, we propose a method that combines motion decoupling and sensor decoupling to solve the mechanical coupling problem caused by the noncoaxial sensor installation of the FSM. Secondly, we suppress the inherent mechanical resonance of the FSM in the control system. Thirdly, we propose the optical path design of a dual-FSM 3D GISC LiDAR tracking imaging system to solve the problem of receiving aperture constraint. Finally, after sufficient experimental verification, our method is shown to successfully reduce the coupling from 7% to 0.6%, and the precision tracking bandwidth reaches 300 Hz. Moreover, when the distance between the GISC system and the target is 2.74 km and the target flight speed is 7 m/s, the tracking accuracy of the system is improved from 15.7 μrad (σ) to 2.2 μrad (σ), and at the same time, the system recognizes the target contour clearly. Our research is valuable to put the GISC technology into practical applications.

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Kabuto, Masanori, Toshihiko Kubota, Hidenori Kobayashi, Hiroaki Takeuchi, Takao Nakagawa, Ryuhei Kitai, Toshiaki Kodera, Hideya Kawai, and Hidetaka Arishima. "Long-term evaluation of reconstruction of the sellar floor with a silicone plate in transsphenoidal surgery." Journal of Neurosurgery 88, no. 6 (June 1998): 949–53. http://dx.doi.org/10.3171/jns.1998.88.6.0949.

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Object. The authors have used a silicone plate for reconstruction of the sellar floor during rhinoseptoplastic transsphenoidal surgery because it has greater elasticity and is easier to carve than nasal septal cartilage and sphenoid sinus bone. This study was designed to evaluate the usefulness of this technique based on the authors' experience during the past 7.6 years. Methods. A silicone plate was used to reconstruct the sellar floor in 69 consecutive patients with sellar tumors that included 60 pituitary adenomas and nine Rathke's cleft cysts. The patients ranged in age from 16 to 82 years (mean 52 years). The postoperative position of the silicone plate could be clearly identified on sagittal or coronal magnetic resonance (MR) imaging as a very low intensity plate (void signal). No displacement or migration of the implanted silicone plate was observed on follow-up MR imaging in any patient. Infections of the lesion such as a pituitary abscess were not observed clinically or radiologically in any patient. Of the 16 patients with intraoperative cerebrospinal fluid (CSF) leakage, only one patient who had a ghost sella developed postoperative CSF rhinorrhea. In all seven patients who underwent repeated surgery for residual or recurrent tumor, the silicone plate that had been placed at the initial procedure was covered with a relatively thin fibrous capsule and the plate was well preserved. The silicone plate was easily removed at reoperation and was useful for detection of the sellar floor window made previously. Conclusions. These results indicate that a silicone plate can be useful for reconstruction of the sellar floor in rhinoseptoplastic transsphenoidal surgery.

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Benga, Gheorghe, Octavian Popescu, and Victor I. Pop. "Water exchange through erythrocyte membranes: p-choloromercuribenzene sulfonate inhibition of water diffusion in ghosts studied by a nuclear magnetic resonance technique." Bioscience Reports 5, no. 3 (March 1, 1985): 223–28. http://dx.doi.org/10.1007/bf01119591.

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A comparison of water diffusion in human erythrocytes and ghosts revealed a longer relaxation time in ghosts, A comparison of water diffusion in human erythrocytes and ghosts revealed a longer relaxation time in ghosts, corresponding to a decreased exchange rate. However, the diffusional permeability of ghosts was not significantly different from that of erythrocytes. The changes in water diffusion following exposure to p-chloromercuribenzene sulfonate (PCMBS) have been studied on ghosts suspended in isotonic solutions. It was found that a significant inhibitory effect of PCMBS on water diffusion occurred only after several minutes of incubation at 37°C. No inhibition was noticed after short incubation at 0°C as previously used in some labelling experiments. This indicates the location in the membrane interior of the SH groups involved in water diffusion across human erythrocyte membranes. The nuclear magnetic resonance (n. m. r.) method appears as a useful tool for studying changes in water diffusiofl in erythrocyte ghosts with the aim of locating the water channel.

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Katz, Louise. "Dangerous narratives: politics, lies, and ghost stories." Cosmopolitan Civil Societies: An Interdisciplinary Journal 3, no. 1 (March 24, 2011): 20–41. http://dx.doi.org/10.5130/ccs.v3i1.1816.

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Narratives that resonate in the cultural imagination inform the ways in which we apprehend the world. This paper considers how certain images and stories that have been valorised over time, bleed into reality and become socially and politically affective. The identity of an entire people, for example, can be rendered down so that those social groups come to seem more spectral than human, through either misrecognition or a lack of acknowledgment. This idea will be discussed through two examples: one provided by traditional anti-Semitism, in which the Jew is viewed as a vampiristic agent of decay; and another in which the Arab presence becomes ‘spectralised’ in contemporary Israel/Palestine. We will look at the development of narratives that create these images, and also consider the liminal zone wherein those images have their source, because it is through imagination and storytelling that we continually create and recreate the realities we must then inhabit.

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Alfano, Chiara. "strange frequencies – reading Hamlet with Derrida and Nancy." Derrida Today 5, no. 2 (November 2012): 214–31. http://dx.doi.org/10.3366/drt.2012.0041.

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This essay sounds out Derrida's plurivocal term of frequencies as well as Nancy's understanding of resonance to argue that ghosts live in the ear. Heeding how the different nuances of this term bear on Derrida's reading of Hamlet, it not only seeks to understand the significance of the ghost's rhythmic appearance:disappearance in Shakespeare's play, but indeed, how it comes to frequent Derrida's Specters of Marx.

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Du, Weiliang, Yiping P. Du, Xiaobing Fan, Marta A. Zamora, and Gregory S. Karczmar. "Reduction of spectral ghost artifacts in high-resolution echo-planar spectroscopic imaging of water and fat resonances." Magnetic Resonance in Medicine 49, no. 6 (May 16, 2003): 1113–20. http://dx.doi.org/10.1002/mrm.10485.

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Kubow, Stan J., and William J. Bettger. "The mobility and reactivity of maleimide-binding proteins in the rat erythrocyte membrane. Effects of dietary zinc deficiency and incubation with zinc in vitro." Canadian Journal of Physiology and Pharmacology 66, no. 1 (January 1, 1988): 66–71. http://dx.doi.org/10.1139/y88-012.

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Erythrocyte ghosts, prepared from rats fed zinc-deficient diets, were analyzed for the mobility of membrane proteins by electron spin resonance spectroscopy of the sulfhydryl-binding spin probe, 4-maleimido-2,2,6,6-tetramethylpiperidine-N-oxyl. Compared with erythrocyte membranes from rats fed zinc-adequate diets ad libitum or pair-fed, erythrocyte membranes from zinc-deficient rats had a significantly increased ratio of weakly immobilized to strongly immobilized probe-binding proteins. This suggests that dietary zinc deficiency causes a conformational change in erythrocyte membrane proteins. Dietary zinc deficiency did not significantly affect N-ethylmaleimide (NEM)-induced thermal sensitivity or NEM-induced mechanical fragility in rat erythrocytes; however, the addition of zinc in vitro to red cells significantly inhibits NEM-induced mechanical fragility.

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Benga, Gheorghe, Victor Ioan Pop, Octavian Popescu, Adriana Hodârnǎu, Victoria Borza, and Elena Presecan. "Effects of temperature on water diffusion in human erythrocytes and ghosts — nuclear magnetic resonance studies." Biochimica et Biophysica Acta (BBA) - Biomembranes 905, no. 2 (December 1987): 339–48. http://dx.doi.org/10.1016/0005-2736(87)90462-7.

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Benga, Gheorghe, Victoria Borza, Octavian Popescu, Victor I. Pop, and Ana Mureşan. "Water exchange through erythrocyte membranes: Nuclear magnetic resonance studies on resealed ghosts compared to human erythrocytes." Journal of Membrane Biology 89, no. 2 (June 1986): 127–30. http://dx.doi.org/10.1007/bf01869708.

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Benga, Gheorghe, Victor Ioan Pop, Octavian Popescu, and Victoria Borza. "On measuring the diffusional water permeability of human red blood cells and ghosts by nuclear magnetic resonance." Journal of Biochemical and Biophysical Methods 21, no. 2 (July 1990): 87–102. http://dx.doi.org/10.1016/0165-022x(90)90057-j.

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