Results for 'Diffraction'

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  1. Diffracting the Rays of Technoscience: A Situated Critique of Representation.Federica Timeto - 2011 - Poiesis and Praxis 8 (2-3):151-167.
    This essay focuses on the possibility of adopting a representational approach for technoscience, in which representation is considered as a situated process of dynamic “intra-action” (Barad 2007 ). Re-elaborating the recent critiques of representationalism (Thrift 2008 ), my analysis begins by analysing Hayles’s situated model of representation from an early essay where she explains her definition of constrained constructivism (Hayles [ 1991 ] 1997). The essay then discusses the notions of figuration and diffraction and the way they are employed (...)
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  2.  67
    Diffraction & Reading Diffractively.Evelien Geerts & Iris van der Tuin - 2021 - Matter: Journal of New Materialist Research 1 (2).
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  3.  49
    Reflective or Diffractive Learning/Teaching? Concurrences of Paul Ramsden And Karen Barad’s Approaches.Karolina Rybačiauskaitė - 2020 - Acta Paedagogica Vilnensia 45:175-183.
    In this article it is argued that the optical metaphor and critical practice of diffraction further developed by Donna Haraway and Karen Barad might be no less significant than the widely spread notion of reflection, when the questions of various practices of knowledge are addressed. By considering Paul Ramsden’s approach to learning/teaching and its underlying theory in higher education alongside Karen Barad’s methodology of diffraction, it is shown that Ramsden’s understanding of learning/teaching is rather based on the theoretical (...)
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  4.  53
    Deleuzoguattarian Thought, the New Materialisms, and (Be)Wild(Erring) Pedagogies: A Conversation Between Chantelle Gray, Delphi Carstens, Evelien Geerts, and Aragorn Eloff.Evelien Geerts, Chantelle Gray, Delphi Carstens & Aragorn Eloff - 2021 - Matter: Journal of New Materialist Research 1 (2).
    This intra-view explores a number of productive junctions between contemporary Deleuzoguattarian and new materialist praxes via a series of questions and provocations. Productive tensions are explored via questions of epistemological, ontological, ethical, and political intra-sections as well as notions of difference, transversal contamination, ecosophical practices, diffraction, and, lastly, schizoanalysis. Various irruptions around biophilosophy, transduction, becomology, cartography, power relations, hyperobjects as events, individuation, as well as dyschronia and disorientation, take the discussion further into the wild pedagogical spaces that both praxes (...)
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  5.  42
    The Mach-Zehnder Interferometer and Photon Dualism: With an Analysis of Nonlocality (2021).Paul A. Klevgard - 2020 - SPIE 11481, Light in Nature VIII, 114810B (21 August 2020).
    The Mach-Zehnder Interferometer (MZI) is chosen to illustrate the long-standing wave-particle duality problem. Why is which-way (welcher weg) information incompatible with wave interference? How do we explain Wheeler’s delayed choice experiment? Most crucially, how can the photon divide at the first beam splitter and yet terminate on either arm with its undiminished energy? The position advanced is that the photon has two identities, one supporting particle features and the other wave features. There is photon kinetic energy that never splits (on (...)
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  6. Intimacy Without Proximity: Encountering Grizzlies as a Companion Species.Jacob Metcalf - 2008 - Environmental Philosophy 5 (2):99-128.
    Using grizzly-human encounters as a case study, this paper argues for a rethinking of the differences between humans and animals within environmental ethics. A diffractive approach that understands such differences as an effect of specific material and discursive arrangements would see ethics as an interrogation of which arrangements enable flourishing, or living and dying well. The paper draws on a wide variety of human-grizzly encounters in order to describe the species as co-constitutive and challenges perspectives that treat bears and other (...)
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  7. Evaluation Synergistic Effect of TiO2, ZnO Nanoparticles and Amphiphilic Peptides (Mastoparan-B, Indolicidin) Against Drug-Resistant Pseudomonas Aeruginosa, Klebsiella Pneumoniae and Acinetobacter Baumannii.Shalaleh Masoumi & Mohammad Reza Shakibaie - 2018 - Archives of Pediatric Infectious Diseases 6 (3):1-8.
    Backgound: The aims of this study were to evaluate the antimicrobial properties and synergistic effects of nano-titanium dioxide (TiO2), nano- zinc oxide (ZnO) and two synthetic peptides (mastoparan-B, indolicidin) against drug-resistant strains of Pseudomonas aeruginosa, Klebsiella pneumoniae, and Acinetobacter baumannii. -/- Methods: From March to August 2015, a total of 30 (10 each) isolates of the above bacteria were recovered from patients in the ICU of two referral hospitals in Kerman, Iran. The sizes and purities of nano-TiO2, nano-ZnO were determined (...)
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  8. Omnicide: Mania, Fatality, and Future-in-Delirium (Review). [REVIEW]Ekin Erkan - 2019 - Philosophy East and West 69 (4):3-6.
    Omnicide: Mania, Fatality and Future-in-Delirium (2019) finds Iranian-American philosopher and comparative literature theorist Jason Bahbak Mohaghegh carving the figure of the diffracted neo-Bedouin wanderer, whose mania we tail through the book’s haunted pages. The book’s namesake, “omnicide,” refers to the complete and total erasure of the Earth--the term has most recently been generally applied in ecological contexts, most markedly in regards to the Anthropocene and futurology. However, it is the explicitly poetic and literary intersection between mania and the grotesque that (...)
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  9.  67
    Photon Physics and the Classical Ontology.Paul Klevgard - manuscript
    We think of kinetic energy (KE) as a quantity possessed by rest mass in motion. But somehow electromagnetic (EM) radiation transports KE across space without any rest mass. In addition, a single photon passing through a double slit diffracts into multiple paths in space without affecting its KE. This is hard to explain. Quantum theories that confront the double slit problem do not address these two issues directly. The ontology of radiation KE is examined which leads to some new ideas (...)
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  10. 601 Books on Space.Francisco Caruso - 2012 - Maluhy & Co..
    Space is one of the most fundamental concepts over which scientific knowledge has been constructed. But it is also true that space concepts extrapolate by far the scientific domain, and permeate many other branches of human knowledge. Those are fascinating aspects that could di per se justify the compilation of a long bibliography. Another one is the passion for books. My interest in some physical, historical and philosophical problems concerning the concept of space in Physics, and its properties, can be (...)
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  11.  41
    Mineralogical and Chemical Characterization of Disseminated Low-Grade Sudanese Chromite Ore in Gedarif State at Umm Saqta-Qala Elnahal.Mahmoud Motasim Hassan & Abdelshakour Awdelkarim - 2019 - Journal of Environmental Analytical Chemistry 6 (3):1-5.
    This study was carried out on the low-grade chromite, Gedarif state, Sudan, at Umm Saqata- Qala Elnahal to achieve full characterization for the ore via Microscopic studies for the polish section samples, X-ray diffraction analysis (XRD), X-ray Fluorescence Analysis (XRF), Scanning electron microscopic with Energy Dispersive X-ray Spectroscopy (SEM-EDX), and physical properties tests. Microscopic study revealed that the liberation size of chromite mineral is in the range (0.30-0.05) mm. also the X-ray diffraction, X-ray fluorescence and scanning electron microscope (...)
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  12. STRUCTURAL AND PHOTOLUMINESCENCE CHARACTERIZATION OF MgAl2O4:Eu PHOSPHOR SYNTHESIZED BY COMBUSTION METHOD.U. K. Jain & J. K. Dongre - 2017 - International Journal of Advanced Reaserch 5 (3):1887-1890.
    The MgAl2O4 spinel doped with Eu2+ ions powder phosphor was prepared at temperature as low as 500 oC using the combustion route. A structural property of the powder was characterized by X-ray diffraction (XRD). This XRD pattern shows the well crystallized cubic phase, Fd-3m space group of MgAl2O4. The estimated average crystalline size is about 36 and 30 nm for MgAl2O4 and Eu doped MgAl2O4 particles respectively. The photoluminescent property of prepared powder was investigated using excitation and emission spectroscopy (...)
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  13. From White Elephant to Nobel Prize: Dennis Gabor's Wavefront Reconstruction.Sean F. Johnston - 2005 - Historical Studies in the Physical and Biological Sciences 36:35-70.
    Dennis Gabor devised a new concept for optical imaging in 1947 that went by a variety of names over the following decade: holoscopy, wavefront reconstruction, interference microscopy, diffraction microscopy and Gaboroscopy. A well-connected and creative research engineer, Gabor worked actively to publicize and exploit his concept, but the scheme failed to capture the interest of many researchers. Gabor’s theory was repeatedly deemed unintuitive and baffling; the technique was appraised by his contemporaries to be of dubious practicality and, at best, (...)
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  14.  24
    Structural and Magnetic Properties of LaxSr1-xMnO3.A. A. Gomaa & A. A. Mohamed - 2018 - International Journal of Academic and Applied Research (IJAAR) 2 (11):1-5.
    Abstract : Samples of LaxSr1-xMnO3 (x = 0.5, 0.55, 0.6, 0.66, and 0.7) were prepared by the citrate-nitrate autocombustion method. The prepared nano-particles were investigated and characterized using X-Ray diffraction (XRD) and Transmission Electron Microscopy (TEM) to confirm the formation of the samples in single phase without any impurities and to calculate the particle size. The magnetic susceptibility χM was measured as a function of temperature and magnetic field intensity. From χM(T) and M(H) the saturation magnetization (Ms), remanent magnetization (...)
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  15.  37
    Structural and Magnetic Properties of Laxsr1-Xmno3.A. A. Gomaa & A. A. Mohamed - 2018 - International Journal of Engineering and Information Systems (IJEAIS) 2 (12):1-4.
    Abstract: Samples of LaxSr1-xMnO3 (x = 0.5, 0.55, 0.6, 0.66, and 0.7) were prepared by the citrate-nitrate autocombustion method. The prepared nano-particles were investigated and characterized using X-Ray diffraction (XRD) and Transmission Electron Microscopy (TEM) to confirm the formation of the samples in single phase without any impurities and to calculate the particle size. The magnetic susceptibility χM was measured as a function of temperature and magnetic field intensity. From χM(T) and M(H) the saturation magnetization (Ms), remanent magnetization (Mr) (...)
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  16. From Intersectionality to Interference: Feminist Onto-Epistemological Reflections on the Politics of Representation.Evelien Geerts & Iris van der Tuin - 2013 - Women's Studies International Forum 3 (41).
    This article reviews the debate on ‘intersectionality’ as the dominant approach in gender studies, with an emphasis on the politics of representation. The debate on intersectionality officially began in the late 1980s, though the approach can be traced back to the institutionalization of women's studies in the 1970s and the feminist movement of the 1960s. Black and lesbian feminists have long advocated hyphenated identities to be the backbone of feminist thought. But in recent years, intersectionality has sustained criticism from numerous (...)
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