Bibliografias temáticas / Extended space

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Literatura científica selecionada sobre o tema "Extended space"

Autor: Grafiati

Publicado: 5 de outubro de 2024

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Artigos de revistas sobre o assunto "Extended space"

Cho, Yun-Hi. "RIGONOMETRY IN EXTENDED HYPERBOLIC SPACE AND EXTENDED DE SITTER SPACE". Bulletin of the Korean Mathematical Society 46, n.º 6 (30 de novembro de 2009): 1099–133. http://dx.doi.org/10.4134/bkms.2009.46.6.1099.

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Jordá, Enrique. "Weighted Vector-Valued Holomorphic Functions on Banach Spaces". Abstract and Applied Analysis 2013 (2013): 1–9. http://dx.doi.org/10.1155/2013/501592.

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We study the weighted Banach spaces of vector-valued holomorphic functions defined on an open and connected subset of a Banach space. We use linearization results on these spaces to get conditions which ensure that a functionfdefined in a subsetAof an open and connected subsetUof a Banach spaceX, with values in another Banach spaceE, and admitting certain weak extensions in a Banach space of holomorphic functions can be holomorphically extended in the corresponding Banach space of vector-valued functions.

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Hopersky, Alexey N., Rustam V. Koneev e Alexey M. Nadolinsky. "On the Extended Hilbert Space". UNIVERSITY NEWS. NORTH-CAUCASIAN REGION. NATURAL SCIENCES SERIES, n.º 1 (29 de março de 2024): 38–42. http://dx.doi.org/10.18522/1026-2237-2024-1-38-42.

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The construction of the extended Hilbert space is presented in the form of a direct sum of the spaces of vectors of finite and infinite norms as the main space in the mathematical formalism of quantum mechanics of a many-electron atom. On the example of constructing the analytical structure of the probability amplitude 1s-3p of photoexcitation of a neon atom, the implementation of the EHS-construct for solving the equations of the self-consistent Hartree-Fock field is given.

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Herrlich, Frank. "The extended Teichmüller space". Mathematische Zeitschrift 203, n.º 1 (janeiro de 1990): 279–91. http://dx.doi.org/10.1007/bf02570736.

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Zhuge, Hai, Erlin Yao, Yunpeng Xing e Jie Liu. "Extended resource space model". Future Generation Computer Systems 21, n.º 1 (janeiro de 2005): 189–98. http://dx.doi.org/10.1016/j.future.2004.09.016.

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COTTOM, D. "Orifices Extended in Space". differences 11, n.º 2 (1 de janeiro de 1999): 1–21. http://dx.doi.org/10.1215/10407391-11-2-1.

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Jaime E. Oliver La Rosa. "Extending Space in Varèse's Interpolations: Extended Stereo Space". Perspectives of New Music 51, n.º 1 (2013): 262. http://dx.doi.org/10.7757/persnewmusi.51.1.0262.

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Jaime E. Oliver La Rosa. "Extending Space in Varèse's Interpolations: Extended Stereo Space". Perspectives of New Music 51, n.º 1 (2013): 262–69. http://dx.doi.org/10.1353/pnm.2013.0017.

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Kang, Kiseok Michael. "Extended Space Deterrence: Providing Security Assurance in Space". Journal of Strategic Security 16, n.º 2 (julho de 2023): 11–25. http://dx.doi.org/10.5038/1944-0472.16.2.2095.

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Many U.S. allies are increasingly dependent on space-based platforms for their military and economic activities. At the same time, the counterspace threats from U.S. adversaries such as China and Russia are rapidly intensifying. The United States has provided extended deterrence to its allies through its overwhelming nuclear and conventional capabilities for decades. The question arises as to whether the time-tested logic of extended deterrence is applicable in the space domain. This research argues that U.S. extended deterrence in space—relying on the traditional mechanism of deterrence-by-punishment—is ineffective due to the unique nature of outer space.

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Gusevskii, N. A., e N. S. Zindinova. "Space of extended Schottky groups". Siberian Mathematical Journal 27, n.º 6 (1987): 838–49. http://dx.doi.org/10.1007/bf00970002.

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Teses / dissertações sobre o assunto "Extended space"

Bandele, Jeremiah Oluwatosin. "Extended free-space optical communications". Thesis, University of Nottingham, 2016. http://eprints.nottingham.ac.uk/37961/.

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This thesis investigates the performance of free-space optical (FSO) communication systems in a turbulent atmosphere employing optical amplifiers (OAs) to extend transmission reach and wavelength-division multiplexing (WDM) to improve capacity. This system performance is considered in the presence of amplified spontaneous emission (ASE) noise, scintillation, beam spreading, atmospheric attenuation and interchannel crosstalk. In this work, the modulation scheme used is the on-off keying non-return-to-zero and the main performance metric employed is the average bit error rate (BER). Various performance evaluation methods are used to estimate system performance. Analysis of single link, cascaded OA and WDM FSO communication systems are given and the implications of using both adaptive (to channel state) and non-adaptive decision threshold schemes are analysed. The benefits of amplifier saturation, for example in the form of effective scintillation reduction when a non-adaptive decision threshold scheme is utilised at the receiver for different atmospheric turbulence regimes, are presented. Monte Carlo simulation techniques are used to model the probability distributions of system parameters such as the optical signal power, amplified spontaneous emission noise, optical signal to noise ratio and the average bit error rate due to scintillation. It is found that the performance of an adaptive decision threshold is superior to a non-adaptive decision threshold for both saturated and fixed gain preamplified receivers and the ability of a saturated gain OA to suppress scintillation is only meaningful for system performance when a non-adaptive decision threshold is used at the receiver. In a saturated gain preamplified system, the optimum non-adaptive decision threshold is investigated. An OA cascade can be successfully used to extend reach in FSO communication systems and specific system implementations are presented. The optimal cascade scheme with a non-adaptive receiver would use frequent low gain saturated amplification although this has a cost implication. Furthermore, a saturated gain amplified WDM FSO system with a non-adaptive decision threshold is superior to a non-amplified WDM FSO system with an adaptive decision threshold.

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Finke, Axel. "On extended state-space constructions for Monte Carlo methods". Thesis, University of Warwick, 2015. http://wrap.warwick.ac.uk/77119/.

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This thesis develops computationally efficient methodology in two areas. Firstly, we consider a particularly challenging class of discretely observed continuous-time point-process models. For these, we analyse and improve an existing filtering algorithm based on sequential Monte Carlo (smc) methods. To estimate the static parameters in such models, we devise novel particle Gibbs samplers. One of these exploits a sophisticated non-entred parametrisation whose benefits in a Markov chain Monte Carlo (mcmc) context have previously been limited by the lack of blockwise updates for the latent point process. We apply this algorithm to a Lévy-driven stochastic volatility model. Secondly, we devise novel Monte Carlo methods – based around pseudo-marginal and conditional smc approaches – for performing optimisation in latent-variable models and more generally. To ease the explanation of the wide range of techniques employed in this work, we describe a generic importance-sampling framework which admits virtually all Monte Carlo methods, including smc and mcmc methods, as special cases. Indeed, hierarchical combinations of different Monte Carlo schemes such as smc within mcmc or smc within smc can be justified as repeated applications of this framework.

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Luckock, H. C. "Strings, p-branes and Skyrmions in curved space". Thesis, University of Newcastle Upon Tyne, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.384005.

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Kaidel, Jörg. "Extended semiclassical approximations for systems with mixed phase space dynamics". [S.l.] : [s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=97013942X.

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Gosson, Maurice A. de. "Extended Weyl calculus and application to the phase-space Schrödinger equation". Universität Potsdam, 2005. http://opus.kobv.de/ubp/volltexte/2009/2987/.

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We show that the Schr¨odinger equation in phase space proposed by Torres-Vega and Frederick is canonical in the sense that it is a natural consequence of the extendedWeyl calculus obtained by letting the Heisenberg group act on functions (or half-densities) defined on phase space. This allows us, in passing, to solve rigorously the TF equation for all quadratic Hamiltonians.

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Sambuco, Adam J. "Layered Space: Toward an Architecture of Superimposition". University of Cincinnati / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1522164995486483.

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Evans, Erin Elizabeth. "An extended analytic range corrector method for the space shuttle entry guidance algorithm". Thesis, Massachusetts Institute of Technology, 2018. http://hdl.handle.net/1721.1/119296.

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Thesis: S.M., Massachusetts Institute of Technology, Department of Aeronautics and Astronautics, 2018.
Cataloged from PDF version of thesis.
Includes bibliographical references (pages 99-101).
Space shuttle entry guidance with an extended analytic range corrector method is presented. The guidance method is a variation of Shuttle entry guidance in which the parameters that define the drag profile are modified using quadratic splines to make the drag profile smooth and easier to customize. In general, in order to account for off-nominal entry conditions and ensure the vehicle flies the correct range to the runway, the nominal reference drag profile is modified on-line utilizing analytic expressions for the derivative of range with respect to the relevant drag profile parameter. This new profile is then used to calculate a reference drag command in the subsequent guidance algorithm cycle. Typical implementations of Shuttle entry guidance modify the drag profile using only one variable to shift the profile by a constant value. This presents problems when the vehicle is highly constrained and can easily violate constraints such as heat load and heat rate constraints due to small drag profile variations. The methods by which the drag profile is updated are changed in order to provide multiple perturbation options. In providing multiple drag profile update parameters, a memoryless range error allocator is implemented with a vector of weights as a design variable. The allocator parameters are designed to take into account heat load while remaining within constraints using a high L/D vertical takeoff horizontal landing reusable launch vehicle simulation. The resulting algorithm seeks to leverage the high-TRL Shuttle entry guidance routine by making minimal modifications to the implementation, while increasing robustness to entry interface dispersions under tight heating constraints. A discussion of the design of the drag profile is included, in which the selection of profile update parameters is explored. Results from optimization of these parameters using a genetic algorithm are presented, as well as Monte Carlo results demonstrating that the allocator can reduce failure rates due to tight drag constraints from 42% to 0%, establishing the impact and success of this analytic range corrector method.
by Erin Elizabeth Evans.
S.M.

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Hussin, Mohamed Nuri Ahmed. "Diversity gain enhancement for extended orthogonal space-time block coding in wireless communications". Thesis, University of Strathclyde, 2013. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=22706.

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Transmit diversity is a powerful technique for enhancing the channel capacity and reliability of multiple-input and multiple-output (MIMO) wireless systems. This thesis considers extended orthogonal space-time block coding (EO-STBC) with beamsteering angles, which have previously been shown to potentially achieve full diversity and array gain with four transmit and one receive antenna. The optimum setting of beamsteering angles applied in the transmitter, which has to be calculated based on channel state information (CSI) at the receiver side, must be quantised and feed back to the transmitter via a reverse feedback link. When operating in a fading scenario, channel coefficients vary smoothly with time. This smooth evolution of channel coefficients motivates the investigation of differential feedback, which can reduce the number of feedback bits, while potentially maintaining near optimum performance. The hypothesis that the smooth evolution of channel coefficients translates into smooth evolution of feedback angles is justified by simulations. The maximum attainable gain under optimum unquantised beamsteering angles is derived, which allows to experimentally assess the effect that quantisation in the feedback channel has on the system performance. In characterising the degradation experienced through time-variation and limited quantised feedback, we demonstrate that the new differential feedback approach offers a practical bandwidth-efficient scheme. Simulation results with Doppler spread conditions confirm that the proposed scheme achieves significant bandwidth savings over previously proposed systems. With a single feedback bit per beamsteering angle the proposed differentially encoded EO-STBC approach can achieve near optimum performance and exceed the performance of non-differential feedback schemes that employ a higher word length. We further propose combining differential encoding with channel estimation that is practically useful because the EO-S. We further propose combining differential encoding with channel estimation that is practically useful because the EO-STBC receiver requires knowledge of the channel coefficients for both detecting the transmitted symbols as well as for computing the optimum angles to be fed back to the transmitter. Channel estimation accompanied by a decision-directed (DD) tracking scheme by means of a Kalman filter has been adopted. The Kalman filter exploits the smooth evolution of the channel coefficients as a motivation for tracking as well as for differential feedback. Further we propose applying an auto-regressive (AR) predictor with order greater than one in the Kalman model. This can be shown to offer advantages in terms of temporal smoothness when addressing channels whose coefficient trajectories evolve smoothly. Simulation results show that the overall EO-STBC system achieves longer tracking periods with suitable bit error (BER) values, and that the performance of the proposed system offers a distinct advantage for lower Doppler spreads with the inclusion of second order AR model instead of the standard first order AR model. The earlier work on EO-STBC systems is for frequency-flat channels. However, in frequency-selective channel a multi-carrier approach can help to split into independent subcarriers. Therefore, the EO-STBC scheme is then applied for a dedicated chirp-based multicarrier based on a fractional Fourier transformer (FrFT) system over doubly dispersive channels, where FrFT-domain is developed to further increase robustness against channel time-variations. Applied in nearstationary channel conditions, the performance of orthogonal frequency division multiplexing (OFDM) receivers that mitigate crosstalk between individual subcarriers are evaluated for open and closed loop schemes. A higher degree of non-stationarity in mobile scenarios will destroy the orthogonality of subcarriers and result in intercarrier interference (ICI) and intersymbol interference (ISI). In this case, minimum mean square error (MMSE) of a reduced system matrix is considered for open loop EO-STBC. The equaliser complexity can be decreased even furtherby using least squares minimum residual (LSMR) iterative algorithm, equalisation are underlined by simulations, demonstrating the overall practical use if the contributions wihtin this thesis towards EO-STBC diversity schemes over both time- and frequency-dispersive channels.

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Wu, Chenchen. "Dynamic analysis of extended bistable reeled fibre-reinforced composite booms for space applications". Thesis, University of Surrey, 2017. http://epubs.surrey.ac.uk/813977/.

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Bistable Reeled Composite (BRC) booms have the potential to be used as lightweight structural elements for a number of space applications. This thesis details an approach for increasing the natural frequency and stiffness of extended BRCs. The motivation for this research is the desire to increase the scalability of a flexible “roll-up” solar array which, in its deployed state, consists of two cantilevered BRCs supporting a flexible Photo Voltaic (PV) cell-covered blanket betwee n them. A parametric study has been presented, which analysed the effects of design parameters on the vibration characteristics of a single boom using a Finite Element (FE) approach. A numerical model was combined with a nonlinear constrained optimisation to maximise the natural frequency of BRC booms with respect to the fibre orientation angles and ply discontinuity locations, under the constraints of the physically achievable braid angles and constant coiled diameters resulting from the deployment mechanism design. The results demonstrate that careful selection of the fibre orientation angles and introducing a step change in the number of plies at strategic positions along the boom length can significantly increase the natural frequency. For instance, the natural frequency of a four-carbon/epoxy-nominalbraid-ply boom (L = 5.1 m, R = 38 mm, and β = 345◦) has been improved by more than 50%. The agreement between the natural frequency values for the complete solar array and the corresponding individual BRC booms indicates that the optimised solutions for a single boom model are applicable to the complete model for the first (cantilever) mode. Experimental verification of the vibration characteristics of optimised BRC booms has also been conducted. Finally, a dynamic stability analysis of the optimised BRC booms under bending has been carried out using FE simulation, to quantify the maximum angular acceleration that they can withstand before failure. The optimised BRC booms exhibit a higher resistance to bending during a spacecraft manoeuvre.

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Nagai, Toshiki. "Space-time Extended Finite Element Method with Applications to Fluid-structure Interaction Problems". Thesis, University of Colorado at Boulder, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10844711.

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This thesis presents a space-time extended finite element method (space-time XFEM) based on the Heaviside enrichment for transient problems with moving interfaces, and its applications to the fluid-structure interaction (FSI) analysis. The Heaviside-enriched XFEM is a promising method to discretize partial differential equations with discontinuities in space. However, significant approximation errors are introduced by time stepping schemes when the interface geometry changes in time. The proposed space-time XFEM applies the finite element discretization and the Heaviside enrichment in both space and time with elements forming a space-time slab. A simple space-time scheme is introduced to integrate the weak form of the governing equations. This scheme considers spatial intersection configuration at multiple temporal integration points. Standard spatial integration techniques can be applied for each spatial configuration. Nitsche's method and the face-oriented ghost-penalty method are extended to the proposed space-time XFEM formulation. The stability, accuracy and flexibility of the space-time XFEM for various interface conditions including moving interfaces are demonstrated with structural and fluid problems. Moreover, the space-time XFEM enables analyzing complex FSI problems using moving interfaces, such as FSI with contact. Two FSI methods using moving interfaces (full-Eulerian FSI and Lagrangian-immersed FSI) are studied. The Lagrangian-immersed FSI method is a mixed formulation of Lagrangian and Eulerian descriptions. As solid and fluid meshes are independently defined, the FSI is computed between non-matching interfaces based on Nitsche's method and projection techniques adopted from computational contact mechanics. The stabilized Lagrange multiplier method is used for contact. Numerical examples of FSI and FSI-contact problems provide insight into the characteristics of the combination of the space-time XFEM and the Lagrangian-immersed FSI method. The proposed combination is a promising method which has the versatility for various multi-physics simulations and the applicability such as optimization.

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Livros sobre o assunto "Extended space"

Connors, Mary M. Living aloft: Human requirements for extended spaceflight. Washington,D.C: U.S. Government Printing Office, 1985.

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Alberta. Alberta Education. Finance and Administration Division. Interim policy and guidelines for the use of vacant school space. [Edmonton]: Finance and Administration Division, Alberta Education, 1985.

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G, Schunk Richard, e George C. Marshall Space Flight Center., eds. Space station CMIF extended duration metabolic control test final report. [Marshall Space Flight Center, Ala.]: National Aeronautics and Space Administration, George C. Marshall Space Flight Center, 1989.

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National Space Science Symposium (1987 Ahmadābād, India). National Space Science Symposium, December 21-24, 1987: Extended abstracts. Ahmedabad: The Laboratory, 1988.

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Institute of Electrical and Electronics Engineers., IEEE Computer Society. Bus Architecture Standards Committee. e IEEE Standards Board, eds. IEEE standard for space applications module, extended height Format E form factor. New York, NY: Institute of Electrical and Electronics Engineers, 1995.

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Workshop of the Extended ESA History Project (2005 Paris, France). The extended ESA history project: Proceedings of the Concluding Workshop : 13-14 April 2005, ESA Headquarters, Paris. Editado por European Space Agency e European Space Research and Technology Centre. Noordwijk, The Netherlands: ESA Publications Division, ESTEC, 2005.

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Min-Kuang, Wu, e United States. National Aeronautics and Space Administration., eds. Damage-mitigating control of space propulsion systems for high performance and extended life. [Washington, DC]: National Aeronautics and Space Administration, 1994.

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Workshop on Biology-based Technology to Enhance Human Well-being and Function in Extended Space Exploration (1997 Center for Advanced Space Studies). Report of the Workshop on Biology-based Technology to Enhance Human Well-being and Function in Extended Space Exploration. Washington, D.C: National Academy Press, 1998.

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Sisir, Roy, ed. Extended electromagnetic theory: Space-charge in vacuo and the rest mass of the photon. Singapore: World Scientific, 1998.

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Capítulos de livros sobre o assunto "Extended space"

Carbonell, Pablo, Baudoin Delépine e Jean-Loup Faulon. "Extended Metabolic Space Modeling". In Methods in Molecular Biology, 83–96. New York, NY: Springer New York, 2018. http://dx.doi.org/10.1007/978-1-4939-7295-1_6.

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Adnan, Md Nasim, Md Zahidul Islam e Paul W. H. Kwan. "Extended Space Decision Tree". In Communications in Computer and Information Science, 219–30. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-662-45652-1_23.

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Zhang, YanXiang, WenBin Hu, QiXian Ling, ChenXiao Zhao e Yi Song. "A VR-Based “Time-Space” Interactive Map Teaching System for Modern Chinese History". In Extended Reality, 51–68. Cham: Springer Nature Switzerland, 2023. http://dx.doi.org/10.1007/978-3-031-43404-4_4.

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Sz.-Nagy, Béla, Hari Bercovici, Ciprian Foias e László Kérchy. "Extended Functional Calculus". In Harmonic Analysis of Operators on Hilbert Space, 159–87. New York, NY: Springer New York, 2010. http://dx.doi.org/10.1007/978-1-4419-6094-8_4.

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Zhang, Yanxiang, Yidan Wang e Yi Song. "Integrating Fragmented Historical Sites VR Based on Time-Space Clues for Modern History Education". In Extended Reality, 313–21. Cham: Springer Nature Switzerland, 2023. http://dx.doi.org/10.1007/978-3-031-43404-4_20.

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Herrlich, Frank. "The nonarchimedean extended Teichmüller space". In Lecture Notes in Mathematics, 256–66. Berlin, Heidelberg: Springer Berlin Heidelberg, 1990. http://dx.doi.org/10.1007/bfb0091143.

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Van Gorkom, Jacqueline. "Intergalactic and Extended Atomic Gas". In Astrophysics and Space Science Library, 345–68. Dordrecht: Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-011-1882-8_20.

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Rainey, Larry B. "Extended Air Defense Simulation (EADSIM)". In Space System Architecture Analysis and Wargaming, 96–98. Boca Raton: CRC Press, 2024. http://dx.doi.org/10.1201/9781003321811-8.

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Pelletier-Gagnon, Jérémie. "Player-flâneurs and Extended Spatiality". In Space and Play in Japanese Videogame Arcades, 87–110. London: Routledge, 2024. http://dx.doi.org/10.4324/9781003273776-7.

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Schmitt, Benjamin, Alexander Pasko e Christophe Schlick. "Constructive Hypervolume Modeling Using Extended Space Mappings". In Heterogeneous Objects Modelling and Applications, 167–92. Berlin, Heidelberg: Springer Berlin Heidelberg, 2008. http://dx.doi.org/10.1007/978-3-540-68443-5_7.

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Trabalhos de conferências sobre o assunto "Extended space"

Jeffrey, Phillip. "Forum contact space". In CHI '00 extended abstracts. New York, New York, USA: ACM Press, 2000. http://dx.doi.org/10.1145/633292.633492.

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Hansen, Thomas Riisgaard, Eva Eriksson e Andreas Lykke-Olesen. "Mixed interaction space". In CHI '05 extended abstracts. New York, New York, USA: ACM Press, 2005. http://dx.doi.org/10.1145/1056808.1057060.

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GERMANY, D., e D. SAUCIER. "Extended Duration Orbiter". In Space Programs and Technologies Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1990. http://dx.doi.org/10.2514/6.1990-3533.

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Lee, Hee Rin, e Carl DiSalvo. "Connected space". In the 27th international conference extended abstracts. New York, New York, USA: ACM Press, 2009. http://dx.doi.org/10.1145/1520340.1520548.

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Richert, Daniel, Ammar Halabi, Anna Eaglin, Matthew Edwards e Shaowen Bardzell. "Arrange-A-Space". In the 2011 annual conference extended abstracts. New York, New York, USA: ACM Press, 2011. http://dx.doi.org/10.1145/1979742.1979797.

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Hwang, Jee Yeon, Henry Holtzman e Mitchel Resnick. "Dual-space drawing". In the 2011 annual conference extended abstracts. New York, New York, USA: ACM Press, 2011. http://dx.doi.org/10.1145/1979742.1979912.

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Takeuchi, Yuichiro. "Synthetic space". In the 2012 ACM annual conference extended abstracts. New York, New York, USA: ACM Press, 2012. http://dx.doi.org/10.1145/2212776.2212803.

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Brewster, Stephen A., e Peter G. Cryer. "Maximising screen-space on mobile computing devices". In CHI '99 extended abstracts. New York, New York, USA: ACM Press, 1999. http://dx.doi.org/10.1145/632716.632855.

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Storrie-Lombardi, Lisa J., Bolinda Kahr, Joseph Hunt, Sean J. Carey, Carson Lee Bennett, Nancy Silbermann, Elena Scire, William A. Mahoney e Patrick J. Lowrance. "Lessons learned in extended-extended Spitzer Space Telescope operations". In Observatory Operations: Strategies, Processes, and Systems VII, editado por Alison B. Peck, Chris R. Benn e Robert L. Seaman. SPIE, 2018. http://dx.doi.org/10.1117/12.2314116.

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Dong, Guozhu, e Jianwen Su. "Space-bounded FOIES (extended abstract)". In the fourteenth ACM SIGACT-SIGMOD-SIGART symposium. New York, New York, USA: ACM Press, 1995. http://dx.doi.org/10.1145/212433.220204.

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Relatórios de organizações sobre o assunto "Extended space"

Germaschewski, Kai. Extended MHD modeling of nonlinear instabilities in fusion and space plasmas. Office of Scientific and Technical Information (OSTI), novembro de 2017. http://dx.doi.org/10.2172/1228752.

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de Almeida, V. F. An Iterative Phase-Space Explicit Discontinuous Galerkin Method for Stellar Radiative Transfer in Extended Atmospheres. Office of Scientific and Technical Information (OSTI), janeiro de 2004. http://dx.doi.org/10.2172/885868.

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Paskaleva, Biliana Stefanova, Pavel B. Bochev e Arlo Leroy Ames. An extended vector space model for information retrieval with generalized similarity measures : theory and applications. Office of Scientific and Technical Information (OSTI), setembro de 2012. http://dx.doi.org/10.2172/1055624.

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Teodosiev, Dimitar, Anna Bouzekova-Penkova, Korneli Grigorov, Rumen Nedkov, Peter Tzvetkov, Boyko Tsyntsarski, Angelina Kosateva, Stanislav Klimov e Valery Grushin. Structural and Mechanical Properties of Glass-Carbon Coatings after an Extended Stay on the International Space Station (ISS). "Prof. Marin Drinov" Publishing House of Bulgarian Academy of Sciences, fevereiro de 2021. http://dx.doi.org/10.7546/crabs.2021.02.05.

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Aleksandrov, Pavlo. NEWS GAMES IN THE UKRAINIAN MEDIA SPACE DURING THE FULL-SCALE RUSSIAN INVASION. Ivan Franko National University of Lviv, março de 2024. http://dx.doi.org/10.30970/vjo.2024.54-55.12140.

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The phenomenon of news games on the topic of the Russian-Ukrainian war of 2022-2023 has been explored in the article. During the research, a number of gaming projects from this period were analyzed, their genre and thematic specificity were determined, examples of gaming products were provided, and our own concept of a news game on the topical subject of wartime was presented. In 2022-2023, many game projects on the theme of the war in Ukraine appeared, which can be fully or partially classified as news games, conditionally dividing them into “civilian” ones, where the game character is a volunteer, an immigrant, a peaceful resident of the occupied territory, etc. and “combat”, in which the character is a Ukrainian soldier or combat unit. These games are primarily developed by gaming studios or individual game developers, rather than journalistic editorial teams, and they target an international audience (almost all the analyzed games have an English version). We categorize these news games as “entertainment” (those primarily oriented towards humor, boosting morale, and using current information or media images) and “serious” (those attempting to explain, reveal the essence, and show the war through the eyes of witnesses). According to the level of technical implementation, these games can be divided into “simple” ones (browser-based, requiring no download or payment) and “complex” ones that offer extended gameplay and are available only through subscription. Almost all gaming projects encourage donations to the Armed Forces of Ukraine and charitable funds, and the authors of paid games always emphasize that a portion of the proceeds will go towards supporting Ukrainian military personnel. Despite their significant potential, news games currently occupy a small niche in the Ukrainian media landscape. At the same time, in our opinion, the creative possibilities offered by the gaming mechanism of this interactive narrative are quite promising for explaining and revealing various socially important topics related to the Russian-Ukrainian war. Keywords: gamification; news games; game format; game research.

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Mayas, Magda. Creating with timbre. Norges Musikkhøgskole, agosto de 2018. http://dx.doi.org/10.22501/nmh-ar.686088.

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Unfolding processes of timbre and memory in improvisational piano performance This exposition is an introduction to my research and practice as a pianist, in which I unfold processes of timbre and memory in improvised music from a performer’s perspective. Timbre is often understood as a purely sonic perceptual phenomenon. However, this is not in accordance with a site-specific improvisational practice with changing spatial circumstances impacting the listening experience, nor does it take into account the agency of the instrument and objects used or the performer’s movements and gestures. In my practice, I have found a concept as part of the creating process in improvised music which has compelling potential: Timbre orchestration. My research takes the many and complex aspects of a performance environment into account and offers an extended understanding of timbre, which embraces spatial, material and bodily aspects of sound in improvised music performance. The investigative projects described in this exposition offer a methodology to explore timbral improvisational processes integrated into my practice, which is further extended through collaborations with sound engineers, an instrument builder and a choreographer: -experiments in amplification and recording, resulting in Memory piece, a series of works for amplified piano and multichannel playback - Piano mapping, a performance approach, with a custom-built device for live spatialization as means to expand and deepen spatio-timbral relationships; - Accretion, a project with choreographer Toby Kassell for three grand pianos and a pianist, where gestural approaches are used to activate and compose timbre in space. Together, the projects explore memory as a structural, reflective and performative tool and the creation of performing and listening modes as integrated parts of timbre orchestration. Orchestration and choreography of timbre turn into an open and hybrid compositional approach, which can be applied to various contexts, engaging with dynamic relationships and re-configuring them.

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Tobies, Stephan. PSpace Reasoning for DLs with Qualifying Number Restrictions. Aachen University of Technology, 1999. http://dx.doi.org/10.25368/2022.96.

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The description logic ALCQI extends the 'standard' description logic ALC by qualifying number restrictions and converse roles. We show that conept satisfiability for this DL is still decidable in polynomial space. The presented algorithm combines techniques from [Tob99a] to deal with qualifying number restrictions and from [HST99] to deal with converse roles. Additionally, we extend the result to ALCQIR, which extends ALCQI by role intersections. This solves an open problem from [DLNN97]. The result for ALCQI has already been presented in the seperate technical report [Tob99b]. In this report we use the same techniques to obtain the stronger result for ALCQIR.

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Tobies, Stephan. PSpace Reasoning for DLs with Qualifying Number Restrictions. Aachen University of Technology, 1999. http://dx.doi.org/10.25368/2022.96.

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Horrocks, Ian, Ulrike Sattler e Stephan Tobies. A Description Logic with Transitive and Converse Roles, Role Hierarchies and Qualifying Number Restrictions. Aachen University of Technology, 1999. http://dx.doi.org/10.25368/2022.94.

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As widely argued [HG97; Sat96], transitive roles play an important role in the adequate representation of aggregated objects: they allow these objects to be described by referring to their parts without specifying a level of decomposition. In [HG97], the Description Logic (DL) ALCHR+ is presented, which extends ALC with transitive roles and a role hierarchy. It is argued in [Sat98] that ALCHR+ is well-suited to the representation of aggregated objects in applications that require various part-whole relations to be distinguished, some of which are transitive. However, ALCHR+ allows neither the description of parts by means of the whole to which they belong, or vice versa. To overcome this limitation, we present the DL SHI which allows the use of, for example, has part as well as is part of. To achieve this, ALCHR+ was extended with inverse roles. It could be argued that, instead of defining yet another DL, one could make use of the results presented in [DL96] and use ALC extended with role expressions which include transitive closure and inverse operators. The reason for not proceeding like this is the fact that transitive roles can be implemented more efficiently than the transitive closure of roles (see [HG97]), although they lead to the same complexity class (ExpTime-hard) when added, together with role hierarchies, to ALC. Furthermore, it is still an open question whether the transitive closure of roles together with inverse roles necessitates the use of the cut rule [DM98], and this rule leads to an algorithm with very bad behaviour. We will present an algorithm for SHI without such a rule. Furthermore, we enrich the language with functional restrictions and, finally, with qualifying number restrictions. We give sound and complete decision proceduresfor the resulting logics that are derived from the initial algorithm for SHI. The structure of this report is as follows: In Section 2, we introduce the DL SI and present a tableaux algorithm for satisfiability (and subsumption) of SI-concepts—in another report [HST98] we prove that this algorithm can be refined to run in polynomial space. In Section 3 we add role hierarchies to SI and show how the algorithm can be modified to handle this extension appropriately. Please note that this logic, namely SHI, allows for the internalisation of general concept inclusion axioms, one of the most general form of terminological axioms. In Section 4 we augment SHI with functional restrictions and, using the so-called pairwise-blocking technique, the algorithm can be adapted to this extension as well. Finally, in Section 5, we show that standard techniques for handling qualifying number restrictions [HB91;BBH96] together with the techniques described in previous sections can be used to decide satisfiability and subsumption for SHIQ, namely ALC extended with transitive and inverse roles, role hierarchies, and qualifying number restrictions. Although Section 5 heavily depends on the previous sections, we have made it self-contained, i.e. it contains all necessary definitions and proofs from scratch, for a better readability. Building on the previous sections, Section 6 presents an algorithm that decides the satisfiability of SHIQ-ABoxes.

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Hague, Mathias, Michael Obanubi, Michael Shaw e Geoff Tyler. The development impact of concessional finance to agri-business: a rapid evidence review. Commercial Agriculture for Smallholders and Agribusiness (CASA), 2020. http://dx.doi.org/10.1079/20240191179.

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The provision of concessional finance has become an increasingly important tool to support enterprise development, especially where financial markets are underdeveloped. For the purposes of this research, concessional finance is defined as that which is extended on terms and/or conditions that are more favourable than those available from the market. This can be achieved, for example, via lower risk adjusted return expectations; terms and conditions that would not be accepted/extended by a commercial financial institution; and/or by providing financing to a borrower/recipient not otherwise served by commercial financing. Risk mitigation tools, guarantees and first-loss products are also included when they are provided on concessional terms. The Foreign, Commonwealth & Development Office (FCDO) of the United Kingdom (UK) has committed funding to a range of concessional finance investors in the agriculture sector, including significant sums for the CDC Group (the UK's development finance institution), AgDevCo (a specialist agribusiness impact investor), the Global Agriculture and Food Security Program (GAFSP) Private Sector Window, and the Africa Enterprise Challenge Fund (AECF). FCDO also makes smaller contributions to more specialized institutions as well as collaborative interventions with other donors in the agriculture sector. These organizations cover the spectrum of investment themes, from close-to-market interest rates for more established businesses to long-term, low- or no-interest debt with packages of advisory support for early stage or highly innovative business models. They deploy a wide range of instruments, some funded, which includes all types of concessional debt and equity; and others unfunded, which covers risk mitigation tools, guarantees and first-loss products when they are provided on concessional terms. Implementing partners use different methods for monitoring and reporting the performance of the concessional funding provided by donors, using both customized measurement mechanisms or those based on more broadly accepted standards such as the Donor Committee for Enterprise Development (DCED). Research ranges from light touch human interest case studies to more formal longitudinal analysis using rigorous statistical survey methods. Academic institutions are increasingly contributing quality research, particularly to the assessment and understanding of development impact, often in partnership with impact investors. Donors themselves both directly engage in research but also provide the majority of the funding for evidence-based learning in both investors and academia. After more than a decade of concerted investment and innovation in the concessional finance space, particularly in sub Saharan Africa and South Asia, there is increasing interest in understanding whether these interventions are providing the development impacts expected and which financing tools and institutions are most effective for different types of farmer and or food market systems. These lessons will allow good practices to be replicated in future and implementation modalities to be improved to maximize development impact and financial performance.

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