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1دورية أكاديمية
المؤلفون: Pasternak, M, Mirza, SS, Luciw, N, Mutsaerts, HJMM, Petr, J, Thomas, D, Cash, D, Bocchetta, M, Tartaglia, MC, Mitchell, SB, Black, SE, Freedman, M, Tang-Wai, D, Rogaeva, E, Russell, LL, Bouzigues, A, van Swieten, JC, Jiskoot, LC, Seelaar, H, Laforce, R, Tiraboschi, P, Borroni, B, Galimberti, D, Rowe, JB, Graff, C, Finger, E, Sorbi, S, de Mendonca, A, Butler, C, Gerhard, A, Sanchez-Valle, R, Moreno, F, Synofzik, M, Vandenberghe, R, Ducharme, S, Levin, J, Otto, M, Santana, I, Strafella, AP, MacIntosh, BJ, Rohrer, JD, Masellis, M
المصدر: Alzheimer's & dementia : the journal of the Alzheimer's Association. 20(5):3525-3542
مصطلحات موضوعية: Medicin och hälsovetenskap
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2دورية أكاديمية
المؤلفون: Ringborg, U, von Braun, J, Celis, J, Baumann, M, Berns, A, Eggermont, A, Heard, E, Heitor, M, Chandy, M, Chen, CJ, Costa, A, De Lorenzo, F, De Robertis, EM, Dubee, FC, Ernberg, I, Gabriel, M, Helland, A, Henrique, R, Joensson, B, Kallioniemi, O, Korbel, J, Krause, M, Lowy, DR, Michielin, O, Nagy, P, Oberst, S, Paglia, V, Parker, MI, Ryan, K, Sawyers, CL, Schuz, J, Silkaitis, K, Solary, E, Thomas, D, Turkson, P, Weiderpass, E, Yang, HM
المصدر: Molecular oncology. 18(2):245-279
مصطلحات موضوعية: Medicin och hälsovetenskap
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3كتاب
المؤلفون: Baldridge, Cates, Freud, Sigmund, 1856-1939, פרויד, זיגמונד, 1856-1939, فرويد، سيجموند, Thomas, D. M., Томас, Д. М., תומס, דונלד מיכאל, 1935-, Baldridge, Cates
المصدر: Holocaust Studies. 24,4 (2018) 488-502
مصطلحات موضوعية: English literature -- History and criticism, Holocaust, Jewish (1939-1945), in literature, Psychic trauma in literature
Subject Person: Thomas, D. M. White hotel, Freud, Sigmund 1856-1939 -- In literature
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4تقرير
المؤلفون: Faga, L., Andrade-Oliveira, F., Camacho, H., Rosenfeld, R., Lima, M., Doux, C., Fang, X., Prat, J., Porredon, A., Aguena, M., Alarcon, A., Allam, S., Alves, O., Amon, A., Avila, S., Bacon, D., Bechtol, K., Becker, M. R., Bernstein, G. M., Bocquet, S., Brooks, D., Buckley-Geer, E., Campos, A., Rosell, A. Carnero, Kind, M. Carrasco, Carretero, J., Castander, F. J., Cawthon, R., Chang, C., Chen, R., Choi, A., Cordero, J., Crocce, M., da Costa, L. N., Pereira, M. E. S., DeRose, J., Diehl, H. T., Dodelson, S., Drlica-Wagner, A., Elvin-Poole, J., Everett, S., Ferrero, I., Ferté, A., Flaugher, B., Fosalba, P., Frieman, J., García-Bellido, J., Gatti, M., Gaztanaga, E., Giannini, G., Gruen, D., Gruendl, R. A., Gutierrez, G., Harrison, I., Hinton, S. R., Hollowood, D. L., Honscheid, K., Huterer, D., James, D. J., Jarvis, M., Jeltema, T., Kuehn, K., Lahav, O., Lee, S., Lidman, C., MacCrann, N., Marshall, J. L., McCullough, J., Mena-Fernández, J., Miquel, R., Myles, J., Navarro-Alsina, A., Palmese, A., Pandey, S., Paterno, M., Pieres, A., Malagón, A. A. Plazas, Raveri, M., Rodriguez-Monroy, M., Rollins, R. P., Ross, A. J., Rykoff, E. S., Samuroff, S., Sánchez, C., Sanchez, E., Cid, D. Sanchez, Schubnell, M., Secco, L. F., Sevilla-Noarbe, I., Sheldon, E., Shin, T., Smith, M., Soares-Santos, M., Suchyta, E., Swanson, M. E. C., Tarle, G., Thomas, D., Troxel, M. A., Tutusaus, I., Weaverdyck, N., Wiseman, P., Yanny, B., Yin, B.
مصطلحات موضوعية: Astrophysics - Cosmology and Nongalactic Astrophysics
الوصف: We present the joint tomographic analysis of galaxy-galaxy lensing and galaxy clustering in harmonic space, using galaxy catalogues from the first three years of observations by the Dark Energy Survey (DES Y3). We utilise the redMaGiC and MagLim catalogues as lens galaxies and the METACALIBRATION catalogue as source galaxies. The measurements of angular power spectra are performed using the pseudo-$C_\ell$ method, and our theoretical modelling follows the fiducial analyses performed by DES Y3 in configuration space, accounting for galaxy bias, intrinsic alignments, magnification bias, shear magnification bias and photometric redshift uncertainties. We explore different approaches for scale cuts based on non-linear galaxy bias and baryonic effects contamination. Our fiducial covariance matrix is computed analytically, accounting for mask geometry in the Gaussian term, and including non-Gaussian contributions and super-sample covariance terms. To validate our harmonic space pipelines and covariance matrix, we used a suite of 1800 log-normal simulations. We also perform a series of stress tests to gauge the robustness of our harmonic space analysis. In the $\Lambda$CDM model, the clustering amplitude $S_8 =\sigma_8(\Omega_m/0.3)^{0.5}$ is constrained to $S_8 = 0.704\pm 0.029$ and $S_8 = 0.753\pm 0.024$ ($68\%$ C.L.) for the redMaGiC and MagLim catalogues, respectively. For the $w$CDM, the dark energy equation of state is constrained to $w = -1.28 \pm 0.29$ and $w = -1.26^{+0.34}_{-0.27}$, for redMaGiC and MagLim catalogues, respectively. These results are compatible with the corresponding DES Y3 results in configuration space and pave the way for harmonic space analyses using the DES Y6 data.
Comment: To be submitted to MNRASالوصول الحر: http://arxiv.org/abs/2406.12675Test
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5تقرير
المؤلفون: Catani, Lorenzo, Galley, Thomas D., Gonda, Tomáš
مصطلحات موضوعية: Quantum Physics
الوصف: In this work we present a hierarchy of generalized contextuality. It refines the traditional binary distinction between contextual and noncontextual theories, and facilitates their comparison based on how contextual they are. Our approach focuses on the contextuality of prepare-and-measure scenarios, described by general probabilistic theories (GPTs). To motivate the hierarchy, we define it as the resource ordering of a novel resource theory of GPT-contextuality. The building blocks of its free operations are classical systems and GPT-embeddings. The latter are simulations of one GPT by another, which preserve the operational equivalences and thus cannot generate contextuality. Noncontextual theories can be recovered as least elements in the hierarchy. We then define a new contextuality monotone, called classical excess, given by the minimal error of embedding a GPT within an infinite classical system. In addition, we show that the optimal success probability in the parity oblivious multiplexing game also defines a monotone in our resource theory. We end with a discussion of a potential interpretation of the non-free operations of the resource theory of GPT-contextuality as expressing a kind of information erasure.
Comment: 34 pagesالوصول الحر: http://arxiv.org/abs/2406.00717Test
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6تقرير
المؤلفون: Bhargava, Yash, Ng, Mason, Zhang, Liang, Balasubramanian, Arvind, Russell, Thomas D., Kaushik, Aman, Jadoliya, Vishal, Ravi, Swati, Bhattacharyya, Sudip, Pahari, Mayukh, Homan, Jeroen, Marshall, Herman L., Chakrabarty, Deepto, Carotenuto, Francesco
مصطلحات موضوعية: Astrophysics - High Energy Astrophysical Phenomena
الوصف: We present the discovery of X-ray polarization from the neutron star low-mass X-ray binary and Z-source, GX~340$+$0, using an Imaging X-ray Polarimetry Explorer (IXPE) observation in March 2024. Along with the IXPE observation, we conducted an extensive X-ray and radio monitoring campaign to ascertain the source properties during and around the IXPE observation. The source was within the horizontal branch throughout the multiwavelength campaign. We measured a significant X-ray polarization in 2--8 keV with polarization degree (PD) = $4.02 \pm 0.35$% and polarization angle (PA) = $37.6 \pm 2.5^\circ$. The energy-dependent polarization indicates that in the 2-2.5 keV energy range, the PA is much lower, $\sim9\pm8^\circ$, while other energy bands are consistent with the PA found over 2.5--8 keV. The simultaneous AstroSat-IXPE spectro-polarimetric observations provide some evidence for independent polarization from various spectral components, hinting at a disparity in the PA from the accretion disk and the Comptonized emission, while suggesting an unpolarized emission from the blackbody component. Radio observations in the 0.7--9 GHz frequency range reveal a non-detection of radio emission in 0.7-1.5 GHz and a significant detection in 5.5--9 GHz, suggesting the presence of a spectral break in 1.5-5.5 GHz. Using ATCA observation we place upper limits on the radio polarization at $<$6% on the linear polarization and $<$4% on the circular polarization at 3$\sigma$ level. We discuss the origin of the X-ray polarization and its implications on the geometry of the spectral components.
Comment: Submitted in ApJL, 4 figures, 3 tablesالوصول الحر: http://arxiv.org/abs/2405.19324Test
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7تقرير
المؤلفون: Gaujac, Benoit, Donà, Jérémie, Copoiu, Liviu, Atkinson, Timothy, Pierrot, Thomas, Barrett, Thomas D.
الوصف: Representation learning and \emph{de novo} generation of proteins are pivotal computational biology tasks. Whilst natural language processing (NLP) techniques have proven highly effective for protein sequence modelling, structure modelling presents a complex challenge, primarily due to its continuous and three-dimensional nature. Motivated by this discrepancy, we introduce an approach using a vector-quantized autoencoder that effectively tokenizes protein structures into discrete representations. This method transforms the continuous, complex space of protein structures into a manageable, discrete format with a codebook ranging from 4096 to 64000 tokens, achieving high-fidelity reconstructions with backbone root mean square deviations (RMSD) of approximately 1-5 \AA. To demonstrate the efficacy of our learned representations, we show that a simple GPT model trained on our codebooks can generate novel, diverse, and designable protein structures. Our approach not only provides representations of protein structure, but also mitigates the challenges of disparate modal representations and sets a foundation for seamless, multi-modal integration, enhancing the capabilities of computational methods in protein design.
الوصول الحر: http://arxiv.org/abs/2405.15840Test
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8تقرير
الوصف: Scaling laws for large language models (LLMs) have provided useful guidance on how to train ever larger models for predictable performance gains. Time series forecasting shares a similar sequential structure to language, and is amenable to large-scale transformer architectures. Here we show that foundational decoder-only time series transformer models exhibit analogous scaling-behavior to LLMs, while architectural details (aspect ratio and number of heads) have a minimal effect over broad ranges. We assemble a large corpus of heterogenous time series data on which to train, and establish, for the first time, power-law scaling relations with respect to parameter count, dataset size, and training compute, spanning five orders of magnitude.
Comment: 8 pages, 3 figuresالوصول الحر: http://arxiv.org/abs/2405.13867Test
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9تقرير
المؤلفون: Wood, Callan M., Miller-Jones, James C. A., Bahramian, Arash, Tingay, Steven J., Prabu, Steve, Russell, Thomas D., Atri, Pikky, Carotenuto, Francesco, Altamirano, Diego, Motta, Sara E., Hyland, Lucas, Reynolds, Cormac, Weston, Stuart, Fender, Rob, Körding, Elmar, Maitra, Dipankar, Markoff, Sera, Migliari, Simone, Russell, David M., Sarazin, Craig L., Sivakoff, Gregory R., Soria, Roberto, Tetarenko, Alexandra J., Tudose, Valeriu
مصطلحات موضوعية: Astrophysics - High Energy Astrophysical Phenomena
الوصف: Multi-wavelength polarimetry and radio observations of Swift J1727.8-1613 at the beginning of its recent 2023 outburst suggested the presence of a bright compact jet aligned in the north-south direction, which could not be confirmed without high angular resolution images. Using the Very Long Baseline Array and the Long Baseline Array, we imaged Swift J1727.8-1613, during the hard/hard-intermediate state, revealing a bright core and a large, two-sided, asymmetrical, resolved jet. The jet extends in the north-south direction, at a position angle of $-0.60\pm0.07\deg$ East of North. At 8.4 GHz, the entire resolved jet structure is $\sim110 (d/2.7\,\text{kpc})/\sin i$ AU long, with the southern approaching jet extending $\sim80 (d/2.7\,\text{kpc})/\sin i$ AU from the core, where $d$ is the distance to the source and $i$ is the inclination of the jet axis to the line of sight. These images reveal the most resolved continuous X-ray binary jet, and possibly the most physically extended continuous X-ray binary jet ever observed. Based on the brightness ratio of the approaching and receding jets, we put a lower limit on the intrinsic jet speed of $\beta\geq0.27$ and an upper limit on the jet inclination of $i\leq74\deg$. In our first observation we also detected a rapidly fading discrete jet knot $66.89\pm0.04$ mas south of the core, with a proper motion of $0.66\pm0.05$ mas hour$^{-1}$, which we interpret as the result of a downstream internal shock or a jet-ISM interaction, as opposed to a transient relativistic jet launched at the beginning of the outburst.
Comment: Submitted to ApJLالوصول الحر: http://arxiv.org/abs/2405.12370Test
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10تقرير
المؤلفون: Cohen, Thomas D., Oh, Hyunwoo
مصطلحات موضوعية: Quantum Physics, High Energy Physics - Lattice, Nuclear Theory
الوصف: The cost and the error of the adiabatic theorem for preparing the final eigenstate are discussed in terms of path length. Previous studies in terms of the norm of the Hamiltonian and its derivatives with the spectral gap are limited to describe the cost of adiabatic state preparation for large systems. We argue that total time is not a good measure for determining the computational difficulty of adiabatic quantum computation by developing a no-go theorem. From the result of time-periodic Hamiltonian cases, we suggest that there are proxies for computational cost which typically grow as path length increases when the error is kept fixed and small and consider possible conjectures on how general the behavior is.
Comment: 10 pages, 0 figuresالوصول الحر: http://arxiv.org/abs/2405.10294Test
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