Relevant bibliographies by topics / Photon framework

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Academic literature on the topic 'Photon framework'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Photon framework"

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Dovlatova, Alla, and Dmitri Yerchuck. "Quantum Field Theory of Dynamics of Spectroscopic Transitions by Strong Dipole-Photon and Dipole-Phonon Coupling." ISRN Optics 2012 (December 12, 2012): 1–10. http://dx.doi.org/10.5402/2012/390749.

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Matrix-operator difference-differential equations for dynamics of spectroscopic transitions in 1D multiqubit exchange-coupled (para)magnetic and optical systems by strong dipole-photon and dipole-phonon coupling are derived within the framework of quantum field theory. It has been established that by strong dipole-photon and dipole-phonon coupling the formation of long-lived coherent system of the resonance phonons takes place, and relaxation processes acquire pure quantum character. It is determined by the appearance of coherent emission process of EM-field energy, for which the resonance phonon system is responsible. Emission process is accompanied by phonon Rabi quantum oscillation, which can be time-shared from photon quantum Rabi oscillations, accompanying coherent absorption process of EM-field energy. For the case of radio spectroscopy, it corresponds to the possibility of the simultaneous observation along with (para)magntic spin resonance, the acoustic spin resonance.
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Getahun, Solomon. "Entanglement formulation in the framework of electrically pumped laser cavity." International Journal of Modern Physics B 30, no. 06 (March 10, 2016): 1650024. http://dx.doi.org/10.1142/s0217979216500247.

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We analyze electrically pumped atomic cavity coupled to a two-mode vacuum reservoirs via a single-port mirror whose open cavity contains N nondegenerate three-level cascade atoms. We carry out our analysis by putting the noise operators associated with a vacuum reservoir in normal order. It is found that unlike the mean photon number, the quadrature squeezing and the degree of entanglement do not depend on the number of atoms. This implies that the quadrature squeezing and the degree of entanglement of the cavity light do not depend on the number of photons. We have also shown that the light generated by the three-level laser is in a squeezed and entangled state, with maximum quadrature squeezing and degree of entanglement being 50%. Moreover, the mean photon number of the system in which the laser operating at threshold and above threshold does not depend on the spontaneous decay constant.
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Yu, Jiancan, Yuanjing Cui, Chuan-De Wu, Yu Yang, Banglin Chen, and Guodong Qian. "Two-Photon Responsive Metal–Organic Framework." Journal of the American Chemical Society 137, no. 12 (March 23, 2015): 4026–29. http://dx.doi.org/10.1021/ja512552g.

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Juntunen, Mikael A. K., Satu I. Inkinen, Juuso H. Ketola, Antti Kotiaho, Matti Kauppinen, Alexander Winkler, and Miika T. Nieminen. "Framework for Photon Counting Quantitative Material Decomposition." IEEE Transactions on Medical Imaging 39, no. 1 (January 2020): 35–47. http://dx.doi.org/10.1109/tmi.2019.2914370.

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Sun, Chun-Yi, Wai-Pong To, Xin-Long Wang, Kaai-Tung Chan, Zhong-Min Su, and Chi-Ming Che. "Metal–organic framework composites with luminescent gold(iii) complexes. Strongly emissive and long-lived excited states in open air and photo-catalysis." Chemical Science 6, no. 12 (2015): 7105–11. http://dx.doi.org/10.1039/c5sc02216a.

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Encapsulation of luminescent gold(iii) complexes by metal–organic frameworks results in enhanced phosphorescence in open air, solid state two-photon-induced phosphorescence, and reusable photo-catalysts under aerobic conditions.
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CHAKRABARTY, SOMENATH, SIBAJI RAHA, and BIKASH SINHA. "PRE-EQUILIBRIUM PRODUCTION OF PHOTONS AND LEPTONS IN RELATIVISTIC HEAVY-ION COLLISIONS." Modern Physics Letters A 07, no. 11 (April 10, 1992): 927–35. http://dx.doi.org/10.1142/s0217732392000823.

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Within the framework of a model similar to Brownian motion in a thermal bath where gluons equilibrate at times earlier than the quarks, it is argued that simultaneous observation of inclusive photons and photon pairs provides a ‘clue’ to the collective distribution of glue in an extended space-time regime.
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LIPPERT, THOMAS, JOACHIM THIEL, NORBERT GRÜN, and WERNER SCHEID. "COHERENCE AND INCOHERENCE IN THE PHOTON AND DILEPTON PRODUCTION BY BREMSSTRAHLUNG IN RELATIVISTIC HEAVY-ION COLLISIONS." International Journal of Modern Physics A 06, no. 29 (December 10, 1991): 5249–69. http://dx.doi.org/10.1142/s0217751x9100246x.

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Due to the strong collective deceleration during the initial stage of relativistic heavy-ion collisions, the nuclear matter irradiates real and virtual bremsstrahlung. We describe the process of bremsstrahlung emission in the framework of a semiclassical model in order to study coherence and incoherence effects in the production process. Guided by the intuitive notation of shock fronts being formed between the incident nuclei, we use a simple parametrization of the nuclear current density. The photon spectrum is studied up to photon energies of 300 MeV. In particular, a gradual transition from the coherent production process of low-energy photons to the incoherent one for hard photons is demonstrated. For heavy collision systems coherence effects in the photon spectra dominate, showing characteristic structures arising from shock fronts. The dilepton spectrum is described in first-order perturbation theory. Generally, dileptons are found to be produced incoherently. Only in the case of dielectron production with small invariant pair masses do moderate coherence effects survive.
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Fischer, Kevin A., Rahul Trivedi, Vinay Ramasesh, Irfan Siddiqi, and Jelena Vučković. "Scattering into one-dimensional waveguides from a coherently-driven quantum-optical system." Quantum 2 (May 28, 2018): 69. http://dx.doi.org/10.22331/q-2018-05-28-69.

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We develop a new computational tool and framework for characterizing the scattering of photons by energy-nonconserving Hamiltonians into unidirectional (chiral) waveguides, for example, with coherent pulsed excitation. The temporal waveguide modes are a natural basis for characterizing scattering in quantum optics, and afford a powerful technique based on a coarse discretization of time. This overcomes limitations imposed by singularities in the waveguide-system coupling. Moreover, the integrated discretized equations can be faithfully converted to a continuous-time result by taking the appropriate limit. This approach provides a complete solution to the scattered photon field in the waveguide, and can also be used to track system-waveguide entanglement during evolution. We further develop a direct connection between quantum measurement theory and evolution of the scattered field, demonstrating the correspondence between quantum trajectories and the scattered photon state. Our method is most applicable when the number of photons scattered is known to be small, i.e. for a single-photon or photon-pair source. We illustrate two examples: analytical solutions for short laser pulses scattering off a two-level system and numerically exact solutions for short laser pulses scattering off a spontaneous parametric downconversion (SPDC) or spontaneous four-wave mixing (SFWM) source. Finally, we note that our technique can easily be extended to systems with multiple ground states and generalized scattering problems with both finite photon number input and coherent state drive, potentially enhancing the understanding of, e.g., light-matter entanglement and photon phase gates.
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Kruse, Michael K. G., and Carlos A. Iglesias. "Two-photon absorption framework for plasma transmission experiments." High Energy Density Physics 31 (April 2019): 38–46. http://dx.doi.org/10.1016/j.hedp.2019.02.004.

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Zhang, Liang, Yi Zhou, Mei Jia, Yiwen He, Wei Hu, Qi Liu, Jing Li, et al. "Covalent Organic Framework for Efficient Two-Photon Absorption." Matter 2, no. 4 (April 2020): 1049–63. http://dx.doi.org/10.1016/j.matt.2020.01.019.

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Dissertations / Theses on the topic "Photon framework"

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Langer, Dominik, 't Hoff Marcel van, Andreas J. Keller, Chetan Nagaraja, Oliver A. Pfaeffli, Maurice Goeldi, Hansjoerg Kasper, and Fritjof Helmchen. "HelioScan : A software framework for controlling in vivo microscopy setups with high hardware flexibility, functional diversity and extendibility." Uppsala universitet, Genetisk utvecklingsbiologi, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-201813.

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Intravital microscopy such as in vivo imaging of brain dynamics is often performed with custom-built microscope setups controlled by custom-written software to meet specific requirements. Continuous technological advancement in the field has created a need for new control software that is flexible enough to support the biological researcher with innovative imaging techniques and provide the developer with a solid platform for quickly and easily implementing new extensions. Here, we introduce HelioScan, a software package written in LabVIEW, as a platform serving this dual role. HelioScan is designed as a collection of components that can be flexibly assembled into microscope control software tailored to the particular hardware and functionality requirements. Moreover, HelioScan provides a software framework, within which new functionality can be implemented in a quick and structured manner. A specific HelioScan application assembles at run-time from individual software components, based on user-definable configuration files. Due to its component-based architecture, HelioScan can exploit synergies of multiple developers working in parallel on different components in a community effort. We exemplify the capabilities and versatility of HelioScan by demonstrating several in vivo brain imaging modes, including camera-based intrinsic optical signal imaging for functional mapping of cortical areas, standard two-photon laser-scanning microscopy using galvanometric mirrors, and high-speed in vivo two-photon calcium imaging using either acousto-optic deflectors or a resonant scanner. We recommend HelioScan as a convenient software framework for the in vivo imaging community.

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Schneider, Michael Peter. "A theoretical framework for waveguide quantum electrodynamics and its application in disordered systems." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät, 2016. http://dx.doi.org/10.18452/17415.

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Wellenleiter Quantenelektrodynamik (Wellenleiter QED) ist ein wichtiger Baustein in vielen zukünftigen, auf Quantenmechanik basierenden Technologien wie z.B. Quantencomputer. Ein typisches Modellsystem besteht aus einem Zwei-Niveau-System (two level system, TLS), das an einen eindimensionalen Wellenleiter gekoppelt wurde. Der Wellenleiter ist dabei durch eine Dispersionsrelation charakterisiert und kann unter anderem Bandkanten enthalten. Wir haben in der Dissertation einen neuartigen Zugang zur Wellenleiter QED präsentiert. Dieser Zugang basiert auf der Quantenfeldtheorie und ermöglicht die Berechnung Greenscher Funktionen im ein- und zwei-Anregungs Unterraum. Diese Greenschen Funktionen wurden benutzt um die Streumatrix und die spektrale Dichte in beiden Unterräumen zu berechnen. Desweiteren konnten wir mit Hilfe von Feynman-Diagrammen die physikalischen Prozesse in der Störungsreihe der Greenschen Funktionen identifizieren. Dies war besonders im zwei-Anregungs-Unterraum von Nutzen. In diesem Fall verhält sich das System nichtlinear, da das TLS nur eine Anregung absorbieren kann. Dadurch werden Effekte induziert wie photon bunching und die effiziente Anregung eines gebundenen Atom-Photon Zustandes. Es war uns möglich diese Effekte in der Störungsreihe der Greenschen Funktion wieder zu finden. Desweiteren haben wir die Greenschen Funktionen im Orts-Zeit-Raum benutzt um ein- und zwei-Photon-Wellenpakete zu propagieren. Es hat sich herausgestellt dass das Verhältnis von Pulsbreite zur spontanten Emissions-zeit sowohl das Streuverhalten als auch die maximale Anregung des TLS bestimmt. Letztendlich haben wir den Einfluss von Unordnung im Wellenleiter auf das Zerfallsverhalten des TLS untersucht. Wir haben entdeckt dass der gebundene Atom-Photon Zustand instabil wird sobald die Unordnung einen kritischen Wert erreicht. Darüberhinaus haben wir eine spezielle Klasse Feynman Diagramme identifiziert, die dem Zerfall eine nichtmarkovsche Dynamik verleihen.
Waveguide quantum electrodynamics (waveguide QED) can be considered as a building block for many prospective technologies like quantum computing. A prototypical system consists of a two-level system (TLS) coupled to a one-dimensional waveguide. The waveguide is characterized by its dispersion relation and can also feature a band edge/slow-light regime. In this thesis we have presented a new theoretical framework for waveguide QED, based on quantum field theory. The framework provides the Green''s functions of the system in the single- and two-excitation sectors for an arbitrary dispersion relation. We have calculated the scattering matrix and the spectral density in both sectors. Furthermore, we have also represented the Green''s functions in the form of Feynman diagrams, from which we can identify the underlying physical processes. A special property of the system is that it behaves nonlinear in the case of two or more photons. This is rooted in the structure of the TLS, which can at most absorb one excitation. The nonlinearity leads to two effects: photon bunching and the efficient excitation of an atom-photon bound state. We have found both effects within our framework and we were able to assign them individual terms in the perturbation series of the Green''s function. Furthermore, we have used the Green''s function in space-time domain to propagate Gaussian one- and two-photon wavepackets. Here, we have identified the ratio of the pulsewidth and the spontaneous emission time as the parameter which governs both the scattering behavior of the photons and the maximal TLS excitation. Eventually, we have investigated the effects of disorder in the waveguide on the decay properties of the TLS. We have found here that the atom-photon bound state is stable for small disorder, but breaks down at sufficiently strong disorder. Furthermore, we have identified a special class of diagrams which render the system non-Markovian even for energies far away from the band edge.
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Balcárek, Daniel. "Virtuální svět." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-232032.

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Main goals of this work are to present game development process and game engine Unity3D and develop game server with application programming interface including framework for using the server. The first part of this work is tageted on history of game genres and game development process. The second part of the thesis is dedicated to describing Unity3D game engine with focus on Unity3D networking. Development tools used in implementation and server desing included framework for use of the server are described in the third part of the thesis. In the last chapter of this work are described most important classes used in developed application.
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Oldenburg, Michael [Verfasser]. "Photon upconversion heterostructures made from surface-anchored metal-organic frameworks / Michael Oldenburg." Karlsruhe : KIT Scientific Publishing, 2019. http://www.ksp.kit.edu.

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Rowe, Jennifer Maria. "Design and Synthesis of Photoactive Metal-Organic Frameworks for Photon Upconversion and Energy Transfer Studies." Diss., Virginia Tech, 2018. http://hdl.handle.net/10919/83875.

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The synthesis, characterization and photophysical properties of three Zr-based Metalorganic frameworks (MOFs) assembled from 2,6-anthracenedicarboxylic acid (2,6-ADCA, 2,6- MOF) and 1,4-anthracenedicarboxylic (1,4-ADCA, 1,4-MOF), and 9,10-anthracenedicarboxylic acid (9,10-ADCA, 9,10-MOF) are described. The crystal structure of the 9,10-MOF was elucidated by synchrotron powder X-ray diffraction (PXRD) analysis and is isostructural with the well-known UiO-66 framework. The 2,6-MOFs also form highly crystalline, octahedral-shaped structures and was characterized by PXRD. Le Bail refinement of the powder pattern revealed that the 2,6-MOF also has UiO-type crystal structure. Conversely, incorporation of the 1,4-ADCA ligand results in large rod-shaped crystals. The excited-state properties of the MOFs were examined using steadstate diffuse reflectance, steady-state emission spectroscopy and time-correlated single photon counting (TCSPC) spectroscopy and are compared to those of the corresponding ligand in solution. Both the unique fluorescent properties of the ligand as well as individual framework structure, result in distinctive luminescent behavior and dictate the extent of intermolecular interactions. Specifically, the 2,6-MOF displays monomeric emission with a fluorescence lifetime (t) of 16.6 ± 1.1 and fluorescence quantum yield (Ff). On the other hand, the 1,4-MOF displays both monomeric and excimeric emission, with corresponding lifetime values of 7.5 ± 0.01 and 19.9 ± 0.1, respectively and a quantum yield of 0.002 ± 0.0001. The propensity for photon upconversion through sensitized triplet-triplet annihilation (TTA-UC) was probed in the three anthracene-based MOFs. The MOFs were surface-modified with Pd(II) mesoporphyrin IX (PdMP) as the triplet sensitizer. Upconverted emission from the 9,10-MOF was observed, with a quantum efficiency (FUC) of 0.46 % and a threshold intensity (Ith) of 142 mW/cm2 . The variation of the spacing between the anthracene units in the MOFs was found to have significant impact on TTA-UC. As a result, upconverted emission is only displayed by the 9-10-MOF. The distance between anthracene linkers in the 2,6-MOF are too large for TTA to occur, while the short distances in the 1,4-MOF inhibit upconversion through competitive excimer formation. To further explore the effects of chromophore spacing on energy transfer processes, a series of zinc-based mixed-ligand MOF were constructed from Zn(II) tetrakis(4- carboxyphenyl)porphyrin (ZnTCPP) and pyrazine, 2,2′-bipyridine (pyz) or 4,4′-bipyridyl (bpy) or 1,4-di(4-pyridyl)benzense (dpbz), comprising ZnTCPP/Zn paddlewheel layers. Across this series, the porphyrin spacing was approximately 6 Å, 11 Å and 16 Å for pyz, bpy and dpbz, respectively. The photophysical properties of the MOFs were explored using stead-state diffuse reflectance spectroscopy and steady-state and time-resolved emission spectroscopies. Florescence quenching studies examined the correlation between porphyrin spacing and efficiency of energy transfer.
Ph. D.
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Epley, Charity Cherie. "Developing Photo-responsive Metal-Organic Frameworks towards Controlled Drug Delivery." Diss., Virginia Tech, 2017. http://hdl.handle.net/10919/78346.

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The development of therapeutic drugs or drug systems that enhance a cancer patient's quality of life during treatment is a primary goal for many researchers across a wide range of disciplines. Many investigators turn to nanoparticles (~50-200 nm in size) that tend to accumulate in tumor tissues in order to deliver active drug compounds to specific sites in the body. This targeted delivery approach would reduce the total body effects of current cancer drugs that result in unwanted (sometimes painful and even fatal) side effects. One of the main obstacles however, is ensuring that drugs incorporated into the nanoparticles are anchored such that premature drug release is prohibited. Also, while it is important to ensure strong drug-nanocarrier interactions, the nanocarrier must be able to release the drug when it has reached its biological target. We have developed a nanocarrier that provides a platform for drug systems that could achieve this drug release via the use of a light "trigger". Metal-Organic Frameworks (MOFs) are a relatively new class of often highly porous materials that act as "sponges" for the absorption of various small molecules. MOFs are so named because they consist of metal clusters that are linked by organic compounds to form networked solids that are easily tuned based on the choice of metal and organic "linker". We have developed a MOF nanocarrier incorporating benign zirconium (IV) metal clusters bridged by an organic component that changes shape when illuminated with a light source. The resulting material is therefore not stable upon irradiation due to the organic linker shape change that disturbs the MOF structure and causes it to degrade. When loaded with drugs, this photo-enhanced degradation results in the release of the cargo thereby, providing a handle on controlling drug release with the use of a light trigger. We have demonstrated that in the presence of the MOF nanocarrier incorporating 5-fluorouracil (a clinically available cancer drug), very low toxicity to human breast cancer cells is observed in the dark, however, cell death occurs in the presence of a light source. These reports offer a model MOF nanocarrier system that could be used to incorporate various drugs and therefore tune the system to an individual patient's needs. Furthermore, we also developed a material that is capable of providing magnetic resonance imaging (MRI) contrast by changing the metal to manganese (II). MRI contrast agents are compounds that serve to either darken or brighten an MRI image based on the agent used and therefore they aid in clinical diagnosis by making internal abnormalities easier to spot. Currently gadolinium (III) complexes are the most widely used contrast agents; however, the toxicity of gadolinium (III) has been shown to be responsible for the development of nephrogenic systemic fibrosis in some patients. This manganese material has also shown useful for the attachment of fluorescent dyes that can aid in the benchtop optical diagnosis of biopsies. These reports provide a basis for developing ways to offer controlled drug delivery in cancer patients and to aid in cancer diagnosis using MOF materials, in an effort to reach the goals of comfortable cancer treatment.
Ph. D.
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Pang, Ka Chuen. "Hydrothermal synthesis of chiral metal-organic frameworks and photo-chromic materials /." View abstract or full-text, 2009. http://library.ust.hk/cgi/db/thesis.pl?CHEM%202009%20PANG.

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Minelli, Arianna. "Les bronzes monophosphate de tungstène et l'antimoine : l'interaction entre l'instabilité de "framework" et le couplage électron-phonon." Thesis, Université Grenoble Alpes (ComUE), 2018. http://www.theses.fr/2018GREAY085/document.

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Les phonons mous et le couplage électron-phonon sont considérés comme responsables d’un grand nombre de transition de phase. Pour en comprendre complétement les mécanismes, il est nécessaire d’étudier à la fois les modifications structurales, les changements de configuration électronique et les dynamiques de réseau cristallin. De toute évidence, cela représente une charge de travail expérimental et théorique considérable, voire même hors d’atteinte.Néanmoins, il est parfois possible d’introduire certaines simplifications et d’ainsi rendre une telle étude réalisable. C’est le cas pour les deux systèmes au cœur de ce travail de thèse, pour lesquels la transition de phase peut être diviser en deux instabilités : l’une est structurale, intrinsèque aux éléments constitutifs du système et l’autre, superposée, provient de la configuration électronique. L’interaction entre ces instabilités est illustrée à travers l’exemple de deux systèmes à priori hétérogènes, la famille des bronzes monophosphate de tungstène d’une part et l’antimoine d’autre part, qui révèleront finalement posséder des similarités inattendues. La combinaison des techniques de diffusion diffuse et de diffusion inélastique de rayons X permet des observations qualitatives et une meilleure compréhension de la situation pour les deux systèmes.Les bronzes monophosphate de tungstène font partie de la famille des oxydes quasi-2D, (PO2)4(WO3)2m, qui ont la particularité d’être sujet à des instabilités de type onde de densité de charges (ODC). Ces bronzes sont constitués d’une structure de perovskite vide composée par des couches octaédriques (WO3)2m. L’épaisseur de chacune de ces couches est définie par la valeur de m, qui mène ainsi à différents types de phase d’ODC. Le cas du terme m=2 a aussi été étudié car le fait que les chaînes zig-zag y soient isolées conduit à une instabilité quasi-1D. La présence d’une phase d’ODC a été découverte à TC=270K avec q=0.25b*. Cette phase est engendrée par le mouvement à corps rigide, plus exactement, par les basculements corrélés des octaèdres. Pour les autres termes (m=6,7 et 8), l’instabilité structurale a une origine différente et est liée à l’agencement en couches de WO3, plus particulièrement aux déplacements corrélés des chaînes W-O-W-O. Ces derniers sont la cause d’une forte diffusion diffuse sur des plans spécifiques, résultant de la présence de phonons ’relativement’ mous localisés dans la même région. Ensuite, l’emboitement de la surface de Fermi quasi-2D est à l’origine de l’ancrage du vecteur de modulation sur une valeur spécifique de transfert de moment, définit par l’interaction de deux instabilités, structurale et électronique. De façon remarquable, l’amplitude des déplacements des atomes de tungstène dans le terme m=8 est beaucoup plus élevée que dans le m=6.L’antimoine à température ambiante possède une structure rhomboédrique, dérivant d’une légère distorsion de la structure cubique primitive (CP) par transition de Peierls. Sous pression, la distorsion se réduit sans toutefois disparaître complétement, puisque l’antimoine se transforme dans un premier temps en une série de structures complexes, pour finalement adopter celle possédant la plus grande symétrie, la structure cubique centrée (CC). De la même façon que pour les bronzes, les caractéristiques de la diffusion diffuse ainsi que, dans une certaine mesure, les particularités de la dynamique du réseau rhomboédrique, s’expliquent à travers de l’instabilité du réseau cubique primitif. Cette dernière est liée aux déplacements corrélés dans les chaînes avec direction pseudo-cubique <100>. En outre, les détails de la transition de phase peuvent être explicités par l’association de l’analyse des vecteurs critiques de la transformation CC-CP avec les résultats expérimentaux obtenus sur la dépendance en pression de l’énergie des phonons
A large number of phase transitions can be interpreted as being driven by phonon softening and/or electron-phonon coupling. Thus, a full mechanistic description requires the understanding of structural transformation, changes in electronic structure and lattice dynamics. All together this represents an enormous, for many cases unrealisable, experimental and theoretical effort.However, with the introduction of appropriate assumptions the problem may be simplified. Here we concentrate on two systems, where the interpretation of the phase transition may be split into an intrinsic instability of the building blocks combined with a superimposed electronic instability. We illustrate the interplay between the framework and electron-phonon-related instabilities using the seemingly heterogeneous examples of phosphate tungsten bronzes and elementary antimony. Based on the combined results from diffuse and inelastic X-ray scattering, we propose for the two systems a picture that explains the experimental observations. The similarities found between these two systems are deemed to be rather surprising.Monophosphate tungsten bronzes are a family of quasi-2D-oxides, (PO2)4(WO3)2m, that exhibits charge density wave (CDW) instability. They contain empty perovskite WO3 slabs with varying thickness between different members, characterised by the $m$ value. This thickness defines the sequence of charge density wave phases that appear on cooling. The degenerate case of $m$=2, presenting a quasi-1D instability, was explored since the WO3-octahedra zig-zag chain is isolated. A CDW phase (TC=270K and q=0.25b*) is found to be linked to a rigid-body motion, precisely, to a correlation in the tilting of the octahedra. For the others studied members, as m=6,7 and 8, we found another kind of structural instability. In this case the origin comes from the WO$_3$ slabs framework, realised as correlated displacements of tungsten atoms along the octahedral 4-fold axis direction (W-O-W-O direction). This leads to a strong x-ray diffuse scattering localised in specific planes, linked to relatively soft phonons modes. Specific Fermi surface nesting, close to the 2D case, gives rise to a freezing of the modulations at the specific momentum transfer, defined by the interplay of two instabilities, the structural and electronic one. Remarkably, the displacements of W for m=8 are much superior than in m=6.Elemental antimony at ambient condition has an A7 rhombohedral structure, obtained by small distortion from primitive cubic (PC) lattice through a Peierls transition. Under pressure, the distortion is reduced, but remains finite, as antimony transforms through a series of highly complex structures, before adopting as last the highest-symmetry body-centred cubic (BCC) phase. The main diffuse scattering features and to some extent the peculiarities in the lattice dynamics of the A7 phase – as above - can be explained by the instability of the primitive cubic network with respect to correlated displacements along the chains with <100> pseudo-cubic directions. Analysis of critical vectors for the BCC-PC transformation together with experimentally obtained phonon-energies pressure dependence provides further insights into the details of the phase transformation
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Paulíček, Ondřej. "Mobilní klient pro publikování fotografií." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2008. http://www.nusl.cz/ntk/nusl-235971.

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The aim of this work is to create an application on Windows Mobile 6 platform for photo publication on the internet. Photos will be associated with geographic information. User will be able to attach geographic information to the photograph with use of connected GPS device and subsequently send these photographs to online publication system directly from mobile device.
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Mathis, Stephan Roy II. "Syntheses and Investigations of Photo and Radioluminescent Stilbene- and Anthracene- Based Lanthanide Metal-Organic Frameworks." DigitalCommons@Robert W. Woodruff Library, Atlanta University Center, 2016. http://digitalcommons.auctr.edu/cauetds/25.

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This research explores the synthesis of anthracene and stilbene-based metal-organic framework (MOF) structures as potential scintillating (radioluminescent) materials for use in the detection of gamma radiation. The organic molecules 9,10-anthracenedicarboxylic acid (ADCH2) and trans-4,4’-stilbenedicarboxylic acid (SDCH2), were each used as a linker, in combination with a range of lanthanide metal ions, to synthesize novel three dimensional MOF structures under hydrothermal conditions. With ADCH2, the early period lanthanides yield isostructures with the metal ion in higher coordination (nine) than for those with late period metals (seven). The ADC-MOFs show linker-based photoluminescence properties with well defined vibronic peaks in their emission profile and their emission (λmax~435 nm) blue shifting from that of the ADCH2 powder (~500 nm) and closer to the organic molecule in monomer arrangement (λmax ~ 420 nm). The structures also show photoluminescence lifetimes between 1 and 2 ns, which is similar to the reported value for monomeric anthracene units. The blue-shift and reduction in lifetime, compared to ADCH2, are indicative of minimal π-π interactions amongst the aromatic moieties, thereby limiting the non-radiative relaxation pathways. On exposure to ionizing radiation (protons and g- rays), the ADC-MOFs demonstrated scintillation properties, with a radioluminescence lifetime of ~ 6 ns which is similar to that of the ADCH2 powder. A combination of SDCH2 and lanthanide metal ions produced two isostructured MOFs containing Tm3+ and Er3+, under the hydrothermal synthesis conditions explored. The 3-D structure contained ultra large diamond-shaped pores with dimensions of 16 Å x 30 Å. A blue-shift of fluorescence spectra was observed for the SDC-MOF structures (λmax ~ 425 nm) compared to that of bulk SDCH2 powder (λmax ~475 nm), and closely resembling that of monomeric isolated SDC units (λmax~475 nm). Their photoluminescence lifetime is ~0.76 ns, about half of that observed for SDCH2 powder. The blue shift and reduction in lifetime (compared to SDCH2) is attributed to minimal π-π interactions between SDC units in the MOF structure, thus minimizing associated non-radiative relaxation pathways. The isolation of anthracene and stilbene in MOF structures therefore has the potential to improve their performance as scintillators.
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Books on the topic "Photon framework"

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Frameworks for Mallarmé: The photo and the graphic aesthetic. Albany: State University of New York Press, 2008.

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Boterberg, Tom, Karin Dieckmann, and Mark Gaze, eds. Radiotherapy and the Cancers of Children, Teenagers, and Young Adults. Oxford University Press, 2020. http://dx.doi.org/10.1093/med/9780198793076.001.0001.

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As most cancers occur in middle-aged or older adults, only a very small proportion of the overall radiotherapy workload relates to children and young people. As there is a wide spectrum of different cancer types in this age group, not only is paediatric cancer uncommon overall but each individual type is very rare. There are many ways in which to deliver radiotherapy, including advanced photon techniques, proton beam therapy, brachytherapy, and molecular radiotherapy. For these reasons, the care of children and young people requiring radiotherapy is limited to a small number of highly specialist centres. Delivery of high-quality paediatric radiotherapy requires a multiprofessional team including radiation or clinical oncologists, therapy radiographers, physicists, dosimetrists, anaesthetists, and play specialists. This team has to interact very closely with the wider paediatric and adolescent oncology multidisciplinary team, which includes oncologists, surgeons with different anatomical expertise, radiologists, and pathologists. Children, with their developing tissues and organs, are more susceptible to long-term radiation-induced complications, including second cancers, than adults. The art of paediatric radiotherapy, therefore, is to select treatment approaches which offer the maximum chance of cure while minimizing the risk of adverse effects. Careful teamwork, peer review of radiotherapy planning, and quality assurance within a clinical trial framework offer the best chances of achieving this balance. This book covers all these aspects, highlighting the need for highly specialist teams with the extensive knowledge and the broad skillset required to offer children and young people the best possible treatments.
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Addison, Tony, and Alan Roe. Conclusions. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198817369.003.0033.

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The extractive industries have invariably occupied a somewhat uncomfortable position in development debate and practice. The very word ‘extraction’ conjures up images of forceful (and painful) removal. The media image is frequently one of despoiling nature, sometimes abusing and destroying the environment, including the resources (water, forests, soils etc.) essential to human life. Nor does mining infrastructure offer the same attractive photo opportunities for local politicians or for visiting ministers from aid-donor countries. In some cases there can be an imbalance of power between large extractives companies and host governments, and corruption and non-transparency are still to be found. This chapter lays out the framework of a book which certainly does not seek to present a rose-tinted view of the development benefits of extractives. Nor does it subscribe to the most negative manifestations of the resource curse thesis.
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Harkness, Geoff. Changing Qatar. NYU Press, 2020. http://dx.doi.org/10.18574/nyu/9781479889075.001.0001.

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Qatar is the wealthiest country in the world—and one of the fastest growing. Its current population is five times larger than it was in 2000. Photos of the Arabian Gulf micronation from the 1980s show a few modest one-story buildings. Today, Qatar’s capital, Doha, is a modern petro-boomtown whose futuristic skyline features a phalanx of space-age skyscrapers. In 2022, Qatar will be the first Arab nation to host the FIFA World Cup. To prepare, Qatar’s government has imported more than one million low-wage workers to construct outdoor air-conditioned soccer stadiums, subway systems, and megahotels. Today, Qatari nationals represent only about 10 percent of their country’s population. Changing Qatar explores how citizenship and nationality are reshaped in these global processes. The nation’s dynastic ruling family assures its conservative Muslim citizenry that Qatar’s rapid modernization will take place alongside cultural preservation. In doing so, the leadership employs modern traditionalism, a flexible narrative framework in which customary and contemporary are strategically merged. Based on three years of immersive fieldwork and 130 revealing interviews, Changing Qatar goes beyond the slogans to examine how the people who inhabit Qatar are coming to terms with its ascent. The book demonstrates how Qataris and non-Qataris reaffirm—and challenge—traditions in many areas of everyday life, from dating and marriage to clothing and humor to gender and sports. A cultural study of citizenship, Changing Qatar delivers a richly detailed portrait of this rising Gulf nation that cannot be found elsewhere.
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Adleyba, Dzhulyetta. The stylistic and poetical-compositional system of a fairy tale. Volume 1 : Oral stylistic foundations of a fairy tale. Experimental study on the Abkhaz material. LLC MAKS Press, 2020. http://dx.doi.org/10.29003/m1473.978-5-317-06459-4_v1.

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In the present edition “The stylistic and poetical-compositional system of a fairy tale” in 2 volumes, the author's works in the field of the study of the stylistic system of a fairy tale, carried out within the framework of an experimental direction in folklore studies, are combined. The study of the problem in this direction was undertaken by the author on the initiative of the outstanding scientist V.M. Gatsak, Doctor of Philology, Corresponding Member RAS, and was conducted over a number of years. The monograph “Oral stylistic foundations of a fairy tale. Experimental study on the abkhaz material”, which constituted 1 volume of this edition “The stylistic and poetical-compositional system of a fairy tale”, is devoted to topical problems of folklore studies, dictated by the urgent need for a comprehensive audio-visual study of folklore style. The work was carried out according to a special methodology, providing for the study of samples of oral poetry in their living existence in the light of the requirements of the experimental direction in folklore with the obligatory use of repeated recordings of fairy texts at different times, as well as film and photo documents. The aim and task of the research is to reveal the peculiarities of the style of fairy tale narration in their conditionality by the laws of preservation and transmission of traditions. The section “Appendices” contains samples of tabular analysis and intonation recording of typed repetitions, a package of film and photographic documents, a disc with a recording of the text being executed and rhythmic segments.
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Book chapters on the topic "Photon framework"

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Li, Henan, Lili Wan, and Shenghui Wang. "Silhouette Photo Style Transfer." In Cognitive Internet of Things: Frameworks, Tools and Applications, 9–18. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-04946-1_2.

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Antony, Rajini P., L. K. Preethi, and Tom Mathews. "Photo-Assisted Antimicrobial Activity of Transition Metal Oxides." In Metal, Metal-Oxides and Metal-Organic Frameworks for Environmental Remediation, 29–61. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-68976-6_2.

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Sandnes, Frode Eika. "A Configurable Photo Browser Framework for Large Image Collections." In Human-Computer Interaction. Design and Development Approaches, 643–52. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-21602-2_70.

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Jin, Xin, Le Wu, Geng Zhao, Xinghui Zhou, Xiaokun Zhang, and Xiaodong Li. "Photo Aesthetic Scoring Through Spatial Aggregation Perception DCNN on a New IDEA Dataset." In Cognitive Internet of Things: Frameworks, Tools and Applications, 41–50. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-04946-1_5.

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Teixeira, Dario, Wim Verhaegh, and Miguel Ferreira. "An Integrated Framework for Supporting Photo Retrieval Activities in Home Environments." In Lecture Notes in Computer Science, 288–303. Berlin, Heidelberg: Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-540-39863-9_22.

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Cai, Guochen, Kyungmi Lee, and Ickjai Lee. "A Framework for Mining Semantic-Level Tourist Movement Behaviours from Geo-tagged Photos." In AI 2016: Advances in Artificial Intelligence, 519–24. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-50127-7_44.

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Khaund, Abhigyan, Daksh Thapar, and Aditya Nigam. "PoshakNet: Framework for Matching Dresses from Real-Life Photos Using GAN and Siamese Network." In Communications in Computer and Information Science, 122–32. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-8697-2_11.

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Wu, Xin-Ping, and Donald G. Truhlar. "Photo-induced Charge Separation and Photoredox Catalysis in Cerium-Based Metal–Organic Frameworks." In ACS Symposium Series, 309–26. Washington, DC: American Chemical Society, 2019. http://dx.doi.org/10.1021/bk-2019-1331.ch014.

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Klaedtke, A., J. Hamm, and O. Hess. "5. Simulation of Active and Nonlinear Photonic Nano-Materials in the Finite-Difference Time-Domain (FDTD) Framework." In Computational Materials Science, 75–101. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-540-39915-5_5.

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Aman, Ayah. "Covering water in times of conflict." In Water conflicts and cooperation: a media handbook, 17–22. Wallingford: CABI, 2021. http://dx.doi.org/10.1079/9781789247954.0005.

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Abstract The prevalence of local perspectives can be easily seen in the local media covering Nile Basin countries; most reports, articles, breaking news and even photos focus on national interests. It mostly shows how the Nile is a vital source for the country and the people's needs. But with the continuous change in the Nile hydropolitics (mainly after the signing of the Cooperative Framework Agreement in 2010, and the construction of the Grand Ethiopian Renaissance Dam in 2011), the media coverage turned to have a more regional perspective, looking more into activities in the riparian countries, exploring how their possible impacts on the national interest might look. This chapter provides an overview of media coverage in Eastern Nile countries. Common challenges that face almost all journalists writing about water are presented, which include (i) understanding the technical, political, legal and social aspects of the water conflict, (ii) credible sources, (iii) lack of confidence, and (iv) non-regular coverage. Solutions for constructive media coverage on the Nile are also given, i.e. training of specialized journalists, conducting constructive dialogues, enhancing media coverage in the Nile Basin, and linking journalists with researchers and officials in workshops to discuss the best solutions for informative and positive coverage.
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Conference papers on the topic "Photon framework"

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Leonard, Francois, Steve Young, and Mohan Sarovar. "General modeling framework for quantum photodetectors (Conference Presentation)." In Advanced Photon Counting Techniques XIII, edited by Mark A. Itzler, K. Alex McIntosh, and Joshua C. Bienfang. SPIE, 2019. http://dx.doi.org/10.1117/12.2519480.

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Hachisuka, Toshiya, Wojciech Jarosz, and Henrik Wann Jensen. "An error estimation framework for photon density estimation." In ACM SIGGRAPH 2010 Talks. New York, New York, USA: ACM Press, 2010. http://dx.doi.org/10.1145/1837026.1837030.

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Giuli, Francesco. "The photon PDF determination within the xFitter framework." In The European Physical Society Conference on High Energy Physics. Trieste, Italy: Sissa Medialab, 2017. http://dx.doi.org/10.22323/1.314.0375.

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Greljo, Admir. "Going beyond "kappa-framework": Higgs Pseudo-observables." In XXVII International Symposium on Lepton Photon Interactions at High Energies. Trieste, Italy: Sissa Medialab, 2016. http://dx.doi.org/10.22323/1.245.0049.

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Hachisuka, Toshiya, Wojciech Jarosz, and Henrik Wann Jensen. "A progressive error estimation framework for photon density estimation." In ACM SIGGRAPH Asia 2010 papers. New York, New York, USA: ACM Press, 2010. http://dx.doi.org/10.1145/1882262.1866170.

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Raymer, M. G., Benjamin Brecht, Dileep V. Reddy, and Christine Silberhorn. "Photon Temporal Modes as a Complete Framework for Quantum Information." In Frontiers in Optics. Washington, D.C.: OSA, 2015. http://dx.doi.org/10.1364/fio.2015.fw3d.2.

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Elliot, Alison. "Implementation of the ATLAS trigger within the ATLAS Multi-Threaded AthenaMT Framework." In XXIX International Symposium on Lepton Photon Interactions at High Energies. Trieste, Italy: Sissa Medialab, 2019. http://dx.doi.org/10.22323/1.367.0139.

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Harrawood, Brian, William Paul Segars, Jayasai Rajagopal, Shobhit Sharma, Anuj Kapadia, Martin Sedlmair, Juan Carlos Ramirez-Giraldo, Karl Stierstorfer, Ehsan Abadi, and Ehsan Samei. "A framework for realistic virtual clinical trials in photon counting computed tomography." In Physics of Medical Imaging, edited by Hilde Bosmans, Guang-Hong Chen, and Taly Gilat Schmidt. SPIE, 2019. http://dx.doi.org/10.1117/12.2512898.

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Persson, Mats, Paurakh L. Rajbhandary, and Norbert J. Pelc. "Generalized linear-systems framework for performance assessment of energy-resolving photon-counting detectors." In Physics of Medical Imaging, edited by Guang-Hong Chen, Joseph Y. Lo, and Taly Gilat Schmidt. SPIE, 2018. http://dx.doi.org/10.1117/12.2293402.

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Sirimanna, Chathuranga. "Photon-jet correlations in p-p and Pb-Pb collisions using JETSCAPE framework." In 10th International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions. Trieste, Italy: Sissa Medialab, 2021. http://dx.doi.org/10.22323/1.387.0051.

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