cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Density Functional Theory for Protein Transfer Free Energy
Creators: name: Mills, Eric A
name: Plotkin, Steven S
Publisher: name: arXiv
Year: 2013
Subjects: subject: Biomolecules (q-bio.BM)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: We cast the problem of protein transfer free energy within the formalism of density functional theory (DFT), treating the protein as a source of external potential that acts upon the solvent. Solvent excluded volume, solvent-accessible surface area, and temperature-dependence of the transfer free energy all emerge naturally within this formalism, and may be compared with simplified "back of the envelope" models, which are also developed here. Depletion contributions to osmolyte induced stability range from 5-$10\kB T$ for typical protein lengths. The general DFT transfer theory developed here may be simplified to reproduce a Langmuir isotherm condensation mechanism on the protein surface in the limits of short-ranged interactions, and dilute solute. Extending the equation of state to higher solute densities results in non-monotonic behavior of the free energy driving protein or polymer collapse. Effective interaction potentials between protein backbone or sidechains and TMAO are obtained, assuming a simple backbone/sidechain 2-bead model for the protein with an effective 6-12 potential with the osmolyte. The transfer free energy $δg$ shows significant entropy: $d(δg)/dT \approx 20 \kB$ for a 100 residue protein. The application of DFT to effective solvent forces for use in implicit-solvent molecular dynamics is also developed. The simplest DFT expressions for implicit-solvent forces contain both depletion interactions and an "impeded-solvation" repulsive force at larger distances.
description: 41 pages, 5 figures, 3 tables
Large Spin Pumping from Epitaxial Y3Fe5O12 Thin Films to Pt and W Layers
Creators: name: Wang, H. L.
name: Du, C. H.
name: Pu, Y.
name: Adur, R.
name: Hammel, P. C.
name: Yang, F. Y.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Epitaxial Y3Fe5O12 thin films have been deposited by off-axis sputtering, which exhibit excellent crystalline quality, enabling observation of large spin pumping signals in Pt/Y3Fe5O12 and W/Y3Fe5O12 bilayers driven by cavity ferromagnetic resonance. The inverse spin Hall voltages reach 2.10 mV and -5.26 mV in 5-mm long Pt/Y3Fe5O12 and W/Y3Fe5O12 bilayers, respectively, excited by a radio-frequency magnetic field of 0.3 Oe. From the ferromagnetic resonance linewidth broadening, the interfacial spin mixing conductance of 4.56E14 Ω-1m-2 and 2.30E14 Ω-1m-2 are obtained for Pt/Y3Fe5O12 and W/Y3Fe5O12 bilayers, respectively.
description: 20 pages 4 figures
Semi-microscopic folding model for the description of two-body halo nuclei
Creators: name: Lay, J. A.
name: Moro, A. M.
name: Arias, J. M.
name: Kanada-En'yo, Y.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: One-neutron halo nuclei, composed by a weakly-bound particle coupled to a core nucleus, are studied within a particle-plus-core model. A semi-microscopic method to generate the two-body Hamiltonian of such a system, including core excitation, is proposed. The method consists in generating the spin-independent part of the valence-core interaction using a single-folding procedure, convoluting a realistic nucleon-nucleon (NN) interaction with the core transition densities. The latter are calculated with the Antisymetrized Molecular Dynamics (AMD) method. The prescription is applied to the well known halo nucleus, $^{11}$Be, as a test case. The results show an important predictive power that opens a door to the understanding of other lesser known halo nuclei. In order to show the potential usefulness of the method, it is applied to analyze the structure of $^{19}$C.
description: 11 pages, 7 figures, 3 tables (version to appear in Phys. Rev. C)
On annular maps of the torus and sublinear diffusion
Creators: name: Dávalos, Pablo
Publisher: name: arXiv
Year: 2013
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: There is a classification by Misiurewicz and Ziemian of elements in Homeo$_0(\mathbf{T}^2)$ by their rotation set $ρ$, according to wether $ρ$ is a point, a segment or a set with nonempty interior. A recent classification of nonwandering elements in Homeo$_0(\mathbf{T}^2)$ by Koropecki and Tal has been given, according to the itrinsic underlying ambient where the dynamics takes place: planar, annular and strictly toral maps. We study the link between these two classifications, showing that, even abroad the nonwandering setting, annular maps are characterized by rotation sets which are \textit{rational segments}. Also, we obtain information on the \textit{sublinear diffusion} of orbits in the -not very well understood- case that $ρ$ has nonempty interior.
description: 62 pages, 23 figures
Teknik analisis dasar dalam Linguistik Korpus
Creators: name: Rajeg, Gede Primahadi Wijaya
Publisher: name: figshare
Year: 2020
Subjects: subject: 209999 Language, Communication and Culture not elsewhere classified
subject: FOS: Languages and literature
subject: 200313 Indonesian Languages
subject: Language
subject: 200407 Lexicography
subject: 200408 Linguistic Structures (incl. Grammar, Phonology, Lexicon, Semantics)

description: UPDATE: Version 2
Version 2 ini berisi update terhadap berkas gpwrajeg_2020_chi-square-excel.xlsx yang menambahkan rancangan tabel Chi-Square 2-by-6 =============================
Salindia dan materi pendukung terkait Linguistik Korpus Kuantitatif yang disajikan pada lokakarya Kebahasaan dan Kesastraan untuk Kelompok Kepakaran Layanan Profesional (KKLP) Perkamusan dan Peristilahan, Sekretariat Badan Pengembangan dan Pembinaan Bahasa (4-5 November 2020 secara daring)
Sitiran jika menggunakan materi di repositori ini:Rajeg, Gede Primahadi Wijaya (2020): Teknik analisis dasar dalam Linguistik Korpus. figshare. Online resource. https://doi.org/10.6084/m9.figshare.13185467

Keterangan
1. Tiga berkas PDF merupakan salindia sedangkan satu PDF adalah materi latihan untuk hari ke-2 (statistik untuk linguistik korpus).
2. Berkas MS Excel dengan nama gpwrajeg_2020_collocations.xlsx berisi formula perhitungan daya asosiasi pasangan dua kata.
3. Berkas MS Excel dengan nama gpwrajeg_2020_chi-square-excel.xlsx. berisi formula menghitung Chi-square, p-value, dan besaran efek (Cramér's V dan Odds Ratio [untuk tabel 2-by-2 saja]) untuk rangancan tabel 2-by-2, 2-by-3, 2-by-6, dan 3-by-3.
4. Materi hari kedua (terkait statistik untuk linguistik korpus) terinspirasi dari tutorial online oleh Stefanowitsch (2004) yang lamannya sudah tidak aktif (terakhir kali mengakses laman tersebut adalah pada tanggal 4 Agustus 2011). Untuk ulasan berbahasa Indonesia dari tutorial Chi-Square oleh Stefanowitsch (2004), bisa dilihat pada G. P. W. Rajeg & I M. Rajeg (2019), yang juga menampilkan penggunaan bahasa pemrograman R untuk melakukan analisis Chi-Square (data dan R code).
5. Berkas gpwrajeg_2020_statistik-untuk-LKorpus-kode-R.R berisi kode pemrograman R untuk beberapa materi hari kedua terkait statistik untuk linguistik korpus.
Referensi
Stefanowitsch, Anatol. 2004. Quantitative thinking for corpus linguists. Tutorial. http://www-user.uni-bremen.de/~anatol/qnt/qnt_dist.html (4 August, 2011).
Rajeg, Gede Primahadi Wijaya & I Made Rajeg. 2019. Pemahaman kuantitatif dasar dan penerapannya dalam mengkaji keterkaitan antara bentuk dan makna. Linguistik Indonesia 37(1). 13–31. https://doi.org/10.26180/5c6e1160b8d8a.
Atom-molecule conversion system subject to phase noises
Creators: name: Shen, H. Z.
name: Xiu, Xiao-Ming
name: Yi, X. X.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The dynamics of atom-molecule conversion system subject to dephasing noises is studied in this paper. With the dephasing master equation and the mean-field theory, we drive a Bloch equation for the system, this equation is compared with the Bloch equation derived by the Bogoliubov-Born-Green-Kirkwood-Yvon (BBGKY) hierarchy truncation approach. Fixed points of the system are calculated by solving both the Bloch equations and the master equation, comparison between these two calculations suggests that while in a short time the mean-field theory is a good approximation for the atom-molecule conversion system, a high order hierarchy truncation approach is necessary for the system in a long time scale. Although the MFT can not predict correctly the fixed points, its prediction on the stability of the fixed points are consistent with the BBGKY theory for a wide range of parameters.
description: 8 pages, 6 figures
Phase Behavior of Materials with Isotropic Interactions Designed by Inverse Strategies to Favor Diamond and Simple Cubic Lattice Ground States
Creators: name: Jain, Avni
name: Errington, Jeffrey R.
name: Truskett, Thomas M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We use molecular simulation to construct equilibrium phase diagrams for two recently introduced model materials with isotropic, soft-repulsive pair interactions designed to favor diamond and simple cubic lattice ground states, respectively, over a wide range of densities [Jain et al., Soft Matter 9 14 (2013)]. We employ free energy based Monte Carlo simulation techniques to precisely trace the inter-crystal and fluid-crystal coexistence curves. We find that both model materials display rich polymorphic phase behavior featuring stable crystals corresponding to the target ground-state structures, as well as a variety of other crystalline (e.g., hexagonal and body-centered cubic) phases and multiple reentrant melting transitions.
description: 4 pages, 2 figures
Extreme-Velocity Quasar Outflows and the Role of X-ray Shielding
Creators: name: Hamann, Fred
name: Chartas, George
name: McGraw, Sean
name: Hidalgo, Paola Rodriguez
name: Shields, Joseph
name: Capellupo, Daniel
name: Charlton, Jane
name: Eracleous, Michael
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Quasar accretion disk winds observed via broad absorption lines (BALs) in the UV produce strong continuous absorption in X-rays. The X-ray absorber is believed to serve critically as a radiative shield to enable radiative driving. However, "mini-BAL" and narrow absorption line outflows have dramatically less X-ray absorption than BALs. Here we examine X-ray and rest-frame UV spectra of 8 mini-BAL quasars with outflow speeds in the range 0.1c to 0.2c to test whether extreme speeds require a strong shield. We find that the X-ray absorption is weak or moderate, with neutral-equivalent column densities N_H < few times 10^22 cm^-2, consistent with mini-BALs at lower speeds. We use photoionization models to show that this amount of shielding is too weak to control the outflow ionizations and, therefore, it is not important for the acceleration. Shielding in complex geometries also seems unlikely because the alleged shield would need to extinguish the ionizing far-UV flux while avoiding detection in X-rays and the near-UV. We argue that the outflow ionizations are kept moderate, instead, by high gas densities in small clouds. If the mini-BALs form at radial distances of order R ~ 2 pc from the central quasar (broadly consistent with theoretical models and with the mini-BAL variabilities observed here and in previous work), and the total column densities in the mini-BAL gas are N_H ~< 10^21 cm^-2, then the total radial extent of outflow clouds is only Delta-R_clouds ~< 3 x 10^13 cm and the radial filling factor is Delta-R_clouds/R ~< 5 x 10^-6 for weak/negligible shielding. Compared to the transverse sizes >~ 8 x 10^15 cm (based on measured line depths), the outflows have shapes like thin "pancakes" viewed face-on, or they occupy larger volumes like a spray of many dense clouds with a small volume filling factor. These results favor models with magnetic confinement in magnetic disk winds.
description: 18 pages, 5 figures, accepted for publication in the MNRAS
The ALHAMBRA survey: an empirical estimation of the cosmic variance for merger fraction studies based on close pairs
Creators: name: López-Sanjuan, C.
name: Cenarro, A. J.
name: Hernández-Monteagudo, C.
name: Varela, J.
name: Molino, A.
name: Arnalte-Mur, P.
name: Ascaso, B.
name: Castander, F. J.
name: Fernández-Soto, A.
name: Huertas-Company, M.
name: Márquez, I.
name: Martínez, V. J.
name: Masegosa, J.
name: Moles, M.
name: Pović, M.
name: Aguerri, J. A. L.
name: Alfaro, E.
name: Benítez, N.
name: Broadhurst, T.
name: Cabrera-Caño, J.
name: Cepa, J.
name: Cerviño, M.
name: Cristóbal-Hornillos, D.
name: Del Olmo, A.
name: Delgado, R. M. González
name: Husillos, C.
name: Infante, L.
name: Perea, J.
name: Prada, F.
name: Quintana, J. M.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Our goal is to estimate empirically, for the first time, the cosmic variance that affects merger fraction studies based on close pairs. We compute the merger fraction from photometric redshift close pairs with 10h^-1 kpc <= rp <= 50h^-1 kpc and Dv <= 500 km/s, and measure it in the 48 sub-fields of the ALHAMBRA survey. We study the distribution of the measured merger fractions, that follow a log-normal function, and estimate the cosmic variance sigma_v as the intrinsic dispersion of the observed distribution. We develop a maximum likelihood estimator to measure a reliable sigma_v and avoid the dispersion due to the observational errors (including the Poisson shot noise term). The cosmic variance of the merger fraction depends mainly on (i) the number density of the populations under study, both for the principal (n_1) and the companion (n_2) galaxy in the close pair, and (ii) the probed cosmic volume V_c. We find a significant dependence on neither the search radius used to define close companions, the redshift, nor the physical selection (luminosity or stellar mass) of the samples. We provide a parametrisation of the cosmic variance with n_1, n_2, and V_c, sigma_v = 0.48 n_1^{-0.54} V_c^{-0.48} (n_2/n_1)^{-0.37}. Thanks to this prescription, future merger fraction studies based on close pairs could account properly for the cosmic variance on their results.
description: 18 pages, 16 figures, 9 tables. A&A, in press
Protocol for a five arm randomised controlled trial (RCT) of bread storage
Creators: name: Craciunas, Laurentiu
name: Hoggan, Wendy
name: Zdoukopoulos, Nikos
name: Prior, Matthew
name: Choudhary, Meenakshi
name: Wilkinson, Jack
Publisher: name: Zenodo
Year: 2020
Subjects: bread
storage
RCT

description: This is the protocol for a five arm randomised controlled trial (RCT) of bread storage published prior to the start of the study.
Magnetic structures and the Ce-Fe coupling induced Fe spin reorientation in CeFeAsO single crystal
Creators: name: Zhang, Qiang
name: Tian, Wei
name: Li, Haifeng
name: Kim, Jong-Woo
name: Yan, Jiaqiang
name: McCallum, R. William
name: Lograsso, Thomas A.
name: Zarestky, Jerel L.
name: Bud'ko, Sergey L.
name: McQueeney, Robert J.
name: Vaknin, David
Publisher: name: arXiv
Year: 2013
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Neutron and synchrotron resonant X-ray magnetic scattering (RXMS) complemented by heat capacity and resistivity measurements reveal the evolution of the magnetic structures of Fe and Ce sublattices in single crystal CeFeAsO. The RXMS of magnetic reflections at the Ce $L_{\rm II}$-edge shows a magnetic transition that is specific to the Ce antiferromagnetic long-range ordering at $T_\texttt{Ce}\approx$ 4 K with short-range Ce ordering above $T_\texttt{Ce}$, whereas neutron diffraction measurements of a few magnetic reflections indicate a transition at $T^{*}\approx$ 12 K with unusual order parameter. Detailed order parameter measurements on several magnetic reflections by neutrons show a weak anomaly at 4 K which we associate with the Ce ordering. The successive transitions at $T_\texttt{Ce}$ and $T^{*}$ can also be clearly identified by two anomalies in heat capacity and resistivity measurements. The higher transition temperature at $T^{*}\approx$ 12 K is mainly ascribed to Fe spin reorientation transition, below which Fe spins rotate uniformly and gradually in the \textit{ab} plane. The Fe spin reorientation transition and short-range Ce ordering above $T_\texttt{Ce}$ reflect the strong Fe-Ce couplings prior to long-range ordering of the Ce. The evolution of the intricate magnetic structures in CeFeAsO going through $T^{*}$ and $T_\texttt{Ce}$ is proposed.
description: 10 pages, 11 figures, Physical Review B, in press
Multimodal Approach for Video Surveillance Indexing and Retrieval
Creators: name: Wali, Ali
name: Alimi, Adel M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Multimedia (cs.MM)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: In this paper, we present an overview of a multimodal system to indexing and searching video sequence by the content that has been developed within the REGIMVid project. A large part of our system has been developed as part of TRECVideo evaluation. The MAVSIR platform provides High-level feature extraction from audio-visual content and concept/event-based video retrieval. We illustrate the architecture of the system as well as provide an overview of the descriptors supported to date. Then we demonstrate the usefulness of the toolbox in the context of feature extraction, concepts/events learning and retrieval in large collections of video surveillance dataset. The results are encouraging as we are able to get good results on several event categories, while for all events we have gained valuable insights and experience.
description: 7 pages
The candidacy of shuffle and shear during compound twinning in hexagonal close-packed structures
Creators: name: Kadiri, Haitham El
name: Barrett, Christopher D.
name: Tschopp, Mark A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: This paper proposes a systematic generalized formulation for calculating both atomic shuffling and shear candidates for a given compound twinning mode in hexagonal closed-packed metals. Although shuffles play an important role in the mobility of twinning dislocations in non-Bravais metallic lattices, their analytical expressions have not been previously derived. The method is illustrated for both flat planes and corrugated planes which are exemplified by {11-22} and {10-12} twinning modes, respectively. The method distinguishes between shuffle displacements and net shuffles. While shuffle displacements correspond to movements between ideal atom positions in the parent and twin lattices, net shuffles comprise contributions from shear on overlying planes which can operate along opposite directions to those of shuffle displacements. Thus, net shuffles in the twinning direction can vanish in a limiting case, as is interestingly the case for those needed in the second plane by the b_4 dislocation candidate in {11-22} twinning. It is found that while shuffle displacement vectors can be irrational when K_1 is corrugated, net shuffle vectors are always rational.
Some Basics on (mostly qualitative) Research Design (Version 2020)
Creators: name: Guzzini, Stefano
Publisher: name: Zenodo
Year: 2020

description: This is the latest version of a document that provides an introduction into some fundamental decisions when it comes to draft a research design. It originated from the experiences gathered while teaching Research Design to PhD students at several universities and workshops and was updated ever since its first version from 2004. Among other things, it includes a discussion about the 'what-why-how', the difference between empirical and theoretical designs, the role of research puzzles, as well as the different forms of empirical theorisation (generalisation, abstraction, translation) and their relation to the naturalist/interpretivist divide.
Efficient Search (RES) for One-Hop Destination over Wireless Sensor Network
Creators: name: Razaque, Abdul
name: Elleithy, Khaled. M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: The revolution of wireless sensors networks (WSNs) has highly augmented the expectations of people to get the work done efficiently, but there is little bit impediment to deal with deployed nodes in WSNs. The nature of used routing and medium access control (MAC) protocols in WSNs is completely different from wireless adhoc network protocols. Sensor nodes do not have enough capability to synchronize with robust way, in resulting causes of longer delay and waste of energy. In this paper, we deploy efficientenergy consuming sensors and to find one hop robust and efficient destination search in WSNs. We firstly deploy BT (Bluetooth enabled) sensors, which offer passive and active sensing capability to save energy. This work is a continuation of previous published work in [2]. The BT node is supported with efficient searchmethodss. The main objective of this contribution is to control different types of objects from remote places using cellular phone. To validate our proposed methodology,simulation is done with network simulator (ns2) to examine the behavior of WSNs. Based on simulation results, we claim that our approach saves 62% energy spent for finding best one- hop destination as compared with existing techniques.
Digitalisierung und filmwissenschaftliche Forschung
Creators: name: Flückiger, Barbara
name: Bohn, Anna
Publisher: name: Humboldt-Universität zu Berlin
Year: 2020
Subjects: subject: Filmwissenschaft
subject: Digital Humanities
subject: Filmästhetik
subject: Materialität
subject: Restaurierung
subject: Digitalisierung
subject: Zugang
subject: Metadaten
subject: Film Studies
subject: Film Aesthetics
subject: Materiality
subject: Restoration
subject: Digitization
subject: Access
subject: Metadata
subject: 020 Bibliotheks- und Informationswissenschaften

description: Mit der Digitalisierung des Films eröffnen sich neue Methoden und Forschungsfelder, denn die Wahrnehmung von Filmgeschichte hat sich durch diesen Umbruch nachhaltig verändert. Video-Streaming ist dabei eingebettet in einen Knotenpunkt zwischen Zugang zu Filmwerken, aber auch neuen Formen der Rezeption und Filmgeschichtsschreibung in Forschung und Lehre. Methoden und Werkzeuge der Digital Humanities sind ein vielversprechendes Feld für die Erforschung von Filmen, ihrer Geschichte, der Ästhetik und Narration. Entwicklungen in den Forschungsprojekten zu Filmfarben am Seminar für Filmwissenschaft der Universität Zürich zeigen exemplarisch auf, welche Potenziale mit den neuen Technologien und Ansätzen verbunden sind.
description: The digitization of film opens up new methods and fields of research, because the perception of film history has changed permanently as a result of this transition. Video streaming is changing access to films but enables also new forms of reception and film historiography in research and teaching. Digital humanities methods and tools are a promising field for researching films, their history, aesthetics and narration. In the framework of research projects on film colors at the Department of Film Studies at the University of Zurich a variety of such developments have been developed that are exemplary for the potential associated with the new technologies and approaches.
Evidence for Majorana bound states in transport properties of hybrid structures based on helical liquids
Creators: name: Crépin, François
name: Trauzettel, Björn
name: Dolcini, Fabrizio
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Majorana bound states can emerge as zero-energy modes at the edge of a two-dimensional topological insulator in proximity to an ordinary s-wave superconductor. The presence of an additional ferromagnetic domain close to the superconductor can lead to their localization. We consider both N-S and S-N-S junctions based on helical liquids and study their spectral properties for arbitrary ferromagnetic scatterers in the normal region. Thereby, we explicitly compute Andreev wave-functions at zero energy. We show under which conditions these states form localized Majorana bound states in N-S and S-N-S junctions. Interestingly, we can identify Majorana-specific signatures in the transport properties of N-S junctions and the Andreev bound levels of S-N-S junctions that are robust against external perturbations. We illustrate these findings with the example of a ferromagnetic double barrier (i.e. a quantum dot) close to the N-S boundaries.
description: In v2, section IV about Josephson junctions has been partly rewritten in order to discuss the ABS spectrum in the presence of a double ferromagnetic barrier. The list of references has been updated
Scattering-Free Optical Levitation of a Cavity Mirror
Creators: name: Guccione, G.
name: Hosseini, M.
name: Adlong, S.
name: Johnsson, M. T.
name: Hope, J.
name: Buchler, B. C.
name: Lam, P. K.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We demonstrate the feasibility of levitating a small mirror using only radiation pressure. In our scheme, the mirror is supported by a tripod where each leg of the tripod is a Fabry-Perot cavity. The macroscopic state of the mirror is coherently coupled to the supporting cavity modes allowing coherent interrogation and manipulation of the mirror motion. The proposed scheme is an extreme example of the optical spring, where a mechanical oscillator is isolated from the environment and its mechanical frequency and macroscopic state can be manipulated solely through optical fields. We model the stability of the system and find a three-dimensional lattice of trapping points where cavity resonances allow for build up of optical field sufficient to support the weight of the mirror. Our scheme offers a unique platform for studying quantum and classical optomechanics and can potentially be used for precision gravitational field sensing and quantum state generation.
description: 5 pages, 3 figures
Measurement of the Mass of the D0 Meson
Creators: name: The BABAR Collaboration
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We report a measurement of the D0 meson mass using the decay chain D*(2010)+ -> D0 pi+ with D0 -> K- K- K+ pi+. The data were recorded with the BaBar detector at center-of-mass energies at and near the Y(4S) resonance, and correspond to an integrated luminosity of approximately 477 1/fb. We obtain m(D0) = (1864.841 +- 0.048 +- 0.063) MeV, where the quoted errors are statistical and systematic, respectively. The uncertainty of this measurement is half that of the best previous measurement.
description: 7 pages, 4 postscript figures, submitted to Phys. Rev. D (Rapid Communications)
Comparison of Quasi-Two-Level Operation of a Flying Capacitor Converter with Quasi-Two-Level Operation of a Modular Multilevel Converter
Creators: name: Mersche, Stefan Christoph
name: Katzenburg, Niklas
name: Kiehnle, Philip
name: Schmitz-Rode, Benedikt
name: Schulz, Dominik
name: Hiller, Marc
Publisher: name: Institute of Electrical and Electronics Engineers (IEEE)
Year: 2022
Subjects: Multilevel Converter
Modular Multilevel Converter
Flying Capacitor Converter
Quasi-Two-Level Operation
Passive Components

description: Today’s medium voltage converters are often multilevel converters. These converters require many large passive components. The new Quasi-Two-Level operating (Q2O) mode is intended to minimize the passive components while preserving the advantages of the multilevel topology as far as possible. This novel operation mode is investigated for the Modular Multilevel Converter (MMC) and the Flying Capacitor Converter (FCC). This paper briefly summarizes and compares the control, modulation and minimization potential of the passive components of the Q2O-mode for these two topologies. Thereby, the different topologies are introduced and compared. Finally, the advantages and disadvantages of this new mode of operation in these two topologies are discussed.
Near-Infrared Evidence for a Sudden Temperature Increase in Eta Carinae
Creators: name: Mehner, Andrea
name: Ishibashi, Kazunori
name: Whitelock, Patricia
name: Nagayama, Takahiro
name: Feast, Michael
name: van Wyk, Francois
name: de Wit, Willem-Jan
Publisher: name: arXiv
Year: 2014
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Aims. Eta Car's ultra-violet, optical, and X-ray light curves and its spectrum suggest a physical change in its stellar wind over the last decade. It was proposed that the mass-loss rate decreased by a factor of about 2 in the last 15 years. We complement these recent results by investigating the past evolution and the current state of eta Car in the near-infrared (IR). Methods. We present JHKL photometry of eta Car obtained at SAAO Sutherland from 2004-2013 with the Mk II photometer at the 0.75-m telescope and JHKs photometry with SIRIUS at the 1.4-m IRSF telescope from 2012-2013. The near-IR light curves since 1972 are analyzed. Results. The long-term brightening trends in eta Car's JHKL light curves were discontinuous around the 1998 periastron passage. After 1998, the star shows excess emission above the extrapolated trend from earlier dates, foremost in J and H, and the blueward, cyclical progression in its near-IR colors is accelerated. The near-IR color evolution is strongly correlated with the periastron passages. After correcting for the secular trend we find that the color evolution matches an apparent increase in blackbody temperature of an optically thick near-IR emitting plasma component from about 3500 to 6000 K over the last 20 years. Conclusions. We suggest that the changing near-IR emission may be caused by variability in optically thick bremsstrahlung emission. Periastron passages play a key role in the observed excess near-IR emission after 1998 and the long-term color evolution. We thus propose as a hypothesis that angular momentum transfer (via tidal acceleration) during periastron passages leads to sudden changes in eta Car's atmosphere resulting in a long-term decrease in the mass-loss rate.
description: 11 pages, 5 figures, accepted in A&A
Two neutron decay from the $2_1^+$ state of $^6$He
Creators: name: Kikuchi, Yuma
name: Matsumoto, Takuma
name: Minomo, Kosho
name: Ogata, Kazuyuki
Publisher: name: arXiv
Year: 2013
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Decay mode of the $2_1^+$ resonant state of $^6$He populated by the $^6$He breakup reaction by $^{12}$C at 240 MeV/nucleon is investigated. The continuum-discretized coupled-channels method is adopted to describe the formation of the $2_1^+$ state, whereas its decay is described by the complex-scaled solutions of the Lippmann-Schwinger equation. From analysis of invariant mass spectra with respect to the $α$-$n$ and $n$-$n$ subsystems, coexistence of two decay modes is found. One is the simultaneous decay of two neutrons correlating with each other and the other is the emission of two neutrons to the opposite directions. The latter is found to be free from the final state interaction and suggests existence of a di-neutron in the $2_1^+$ state of $^6$He.
description: 5 pages, 4 figures, submitted to Phys. Rev. C
The roton-assisted chiral p-wave superfluid in a quasi-two-dimensional dipolar Bose-Fermi quantum gas mixture
Creators: name: Kain, Ben
name: Ling, Hong Y.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: The chiral p-wave (p_x \pm ip_y) superfluid has attracted significant attention in recent years, mainly because its vortex core supports a Majorana fermion which, due to its non-Abelian statistics, can be explored for implementing topological quantum computation. Mixing dipolar bosons with fermions in quasi-two-dimensional (2D) space offers the opportunity to use the roton minimum as a tool for engineering the phonon-induced attractive interaction between fermions. We study, within the Hartree-Fock-Bogoliubov approach, the p-wave superfluid pairings in a quasi-2D dipolar Bose-Fermi mixture. We show that enhancing the induced interaction by lowering the roton minimum can affect the stability property of the mixture as well as the effective mass of the fermions in an important way. We also show that one can tune the system to operate in stable regions where chiral p-wave superfluid pairings can be resonantly enhanced by lowering the energy cost of the phonons near the roton minimum.
description: 6 pages, 2 figures
MALT90: The Millimetre Astronomy Legacy Team 90 GHz Survey
Creators: name: Jackson, J. M.
name: Rathborne, J. M.
name: Foster, J. B.
name: Whitaker, J. S.
name: Sanhueza, P.
name: Claysmith, C.
name: Mascoop, J. L.
name: Wienen, M.
name: Breen, S. L.
name: Herpin, F.
name: Duarte-Cabral, A.
name: Csengeri, T.
name: Longmore, S.
name: Contreras, Y.
name: Indermuehle, B.
name: Barnes, P. J.
name: Walsh, A. J.
name: Cunningham, M. R.
name: Brooks, K. J.
name: Britton, T. R.
name: Voronkov, M. A.
name: Urquhart, J. S.
name: Alves, J.
name: Jordan, C. H.
name: Hill, T.
name: Hoq, S.
name: Finn, S.
name: C., S.
name: Bains, I.
name: Bontemps, S.
name: Bronfman, L.
name: Caswell, J. L.
name: Deharveng, L.
name: Ellingsen, S. P.
name: Fuller, G. A.
name: Garay, G.
name: Green, J. A.
name: Hindson, L.
name: Jones, P. A.
name: Lenfestey, C.
name: Lo, N.
name: Lowe, V.
name: Mardones, D.
name: Menten, K. M.
name: Minier, V.
name: Morgan, L. K.
name: Motte, F.
name: Muller, E.
name: Peretto, N.
name: Purcell, C. R.
name: Schilke, P.
name: Schneider-Bontemps, N.
name: Schuller, F.
name: Titmarsh, A.
name: Wyrowski, F.
name: Zavagno, A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The Millimetre Astronomy Legacy Team 90 GHz (MALT90) survey aims to characterise the physical and chemical evolution of high-mass star-forming clumps. Exploiting the unique broad frequency range and on-the-fly mapping capabilities of the Australia Telescope National Facility Mopra 22 m single-dish telescope, MALT90 has obtained 3' x 3' maps toward ~2000 dense molecular clumps identified in the ATLASGAL 870 um Galactic plane survey. The clumps were selected to host the early stages of high-mass star formation and to span the complete range in their evolutionary states (from prestellar, to protostellar, and on to HII regions and photodissociation regions). Because MALT90 mapped 16 lines simultaneously with excellent spatial (38") and spectral (0.11 km/s) resolution, the data reveal a wealth of information about the clump's morphologies, chemistry, and kinematics. In this paper we outline the survey strategy, observing mode, data reduction procedure, and highlight some early science results. All MALT90 raw and processed data products are available to the community. With its unprecedented large sample of clumps, MALT90 is the largest survey of its type ever conducted and an excellent resource for identifying interesting candidates for high resolution studies with ALMA.
description: Accepted to PASA, 13 pages
LANDFEED Project Kicks Off: Transforming Agro-Food Waste into Bio-Based Fertilisers to Support Europe's Circular Economy
Creators: name: European Science Communication Institute gGmbH
Publisher: name: Zenodo
Year: 2024

description: The LANDFEED project, co-funded by the EU, launched its kick-off meeting in Bilbao, Spain, on September 12-13. Led by Miriam Pinto from NEIKER, the project aims to address Europe’s waste issues by developing sustainable, circular solutions. LANDFEED will convert under-utilized waste from various sources, such as the agri-food industry and urban areas, into bio-based fertilizers. This initiative supports the EU's goals of reducing waste, enhancing soil health, and promoting a circular economy.
On the X-ray variability of magnetar 1RXS J170849.0-400910
Creators: name: Scholz, P.
name: Archibald, R. F.
name: Kaspi, V. M.
name: Ng, C. -Y.
name: Beardmore, A. P.
name: Gehrels, N.
name: Kennea, J. A.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present a long-term X-ray flux and spectral analysis for 1RXS J170849.0-400910 using Swift/XRT spanning over 8 years from 2005-2013. We also analyze two observations from Chandra and XMM in the period from 2003-2004. In this 10-yr period, 1RXS J170849.0-400910 displayed several rotational glitches. Previous studies have claimed variations in the X-ray emission associated with some of the glitches. From our analysis we find no evidence for significant X-ray flux variations and evidence for only low-level spectral variations. We also present an updated timing solution for 1RXS J170849.0-400910, from RXTE and Swift observations, which includes a previously unreported glitch at MJD 56019. We discuss the frequency and implications of radiatively quiet glitches in magnetars.
description: 9 pages, 2 figures, accepted for publication in ApJ
Fairness in multimedia processing
Creators: name: Alasadi, Jamal
Publisher: name: No Publisher Supplied
Year: 2023

description: Recently, Machine learning, as a branch of artificial intelligence, has been playing an increasingly significant role in academia and industry fields, specifically in terms of image classification, object detection, and video analytics. Recent reports of bias in multimedia algorithms (e.g., lesser accuracy of face detection for women and persons of color) haveunderscored the urgent need to devise approaches which work equally well for different demographic groups. Hence, we posit that ensuring fairness in multimodal processing (e.g., equal performance irrespective of the gender of the user) is an important research challenge.This dissertation proposes three novel contributions to the literature on fairness in multimedia processing. We first focus on the problem of face matching (i.e., matching low-resolution and high-resolution images of a person). We describe how adopting an adversarial deep learning-based approach allows for the model to maintain accuracy at face matching while also reducing demographic disparities compared to a baseline (non-adversarial deep learning) approach. The results motivate and pave the way for more accurate and fair face-matching algorithms.Secondly, we consider multimodal cyberbullying detection and propose a fairness-aware fusion framework, which ensures both fairness and accuracy when combining data coming from multiple modalities. This Bayesian fusion framework is cognizant of the different confidence levels associated with each feature, the inter-dependencies between features, and, importantly, the fairness potential of each feature. Results of applying the framework to a multimodal (visual and text) cyberbullying detection problem demonstrate the value of the proposed framework in ensuring both accuracy and fairness.Our third contribution revisits the problem of fairness in face matching and proposes a generative AI framework that can counter multiple kinds of bias (e.g., gender bias and age bias) at the same time. The framework consists of two major components: a variational auto-encoder (VAE) that converts the images into their more generic underlying representation, and second, a neural network architecture that uses the above representations to undertake multi-label classification. A generative approach is useful in ensuring that the system learns to deal with the underlying (latent) structure of the data for better generalizability and bias reduction. The approach is tested over a public image dataset and found to be effective at reducing bias while maintaining high accuracy.In effect, the three contributions pave way for fairer multimedia information processing which would enable multiple security and personalization applications to provide equal opportunities to different demographic groups.
Using Integral Dispersion Relations to Extend the LHC Reach for New Physics
Creators: name: Denton, Peter B.
name: Weiler, Thomas J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Many models of electroweak symmetry breaking predict new particles with masses at or just beyond LHC energies. Even if these particles are too massive to be produced on-shell at the LHC, it may be possible to see evidence of their existence through the use of integral dispersion relations (IDRs). Making use of Cauchy's integral formula and the analyticity of the scattering amplitude, IDRs are sensitive in principle to changes in the cross section at arbitrarily large energies. We investigate some models of new physics. We find that a sudden, order one increase in the cross section above new particle mass thresholds can be inferred well below the threshold energy. On the other hand, for two more physical models of particle production, we show that the reach in energy and the signal strength of the IDR technique is greatly reduced. The peak sensitivity for the IDR technique is shown to occur when the new particle masses are near the machine energy, an energy where direct production of new particles is kinematically disallowed, phase-space suppressed, or if applicable, suppressed by the soft parton distribution functions. Thus, IDRs do extend the reach of the LHC, but only to a window around $M_χ\sim \sqrt{s_{_{\rm LHC}}}$.
description: 11 pages, 8 figures
Detecting malingered neurocognitive dysfunction: Comparative analysis of freestanding and embedded performance validity tests
Creators: name: Sistiaga, Sonia
name: Gilis, Sarah
name: Wilmotte, Perrine
name: Vicenzutto, Audrey
name: Loureiro, Isabelle Simoes
Publisher: name: Taylor & Francis
Year: 2024
Subjects: subject: Medicine
subject: Neuroscience
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Science Policy
subject: Mental Health

description: Detecting malingered neurocognitive dysfunction is a major issue in forensic context, particularly in legal proceeding/insurance assessment after a traumatic brain injury (TBI), condition frequently associated with persistent cognitive impairments that may potentially be related to malingering. Consequently, research has devoted considerable efforts on developing tools to verify symptoms authenticity. This study compared two freestanding performance validity tests (PVTs) (Amsterdam Short-Term Memory Test—ASTM; Word Completion Memory Test—WCMT) and five embedded PVTs (Rey Complex Figure Test—RCFT—Copy and Recall trials; Reliable Digit Span—RDS; Rey Auditory Verbal Learning Test—RAVLT—Recognition and Total Learning trials) in a sample of 120 participants, including 15 patients with TBI (Mage = 44.40), 52 experimental simulators (Mage = 29.52) and 53 control (Mage = 29.77). Group performance was analyzed to assess tests’ discriminatory power, and Receiver Operating Characteristic (ROC) curves were used to examine tools’ sensitivity and specificity. Results indicated that experimental simulators performance on the ASTM, WCMT, and RAVLT differed significantly from TBI patients and controls. The RDS and RCFT did not discriminate experimental simulators from TBI group. ROC curves analysis reveals that the most accurate tests in this battery for detecting malingering were the ASTM and the RAVLT-Total Learning score. This study offers implications for identifying malingering in medico-legal settings, underscoring the importance of incorporating PVTs into clinical practice.
Terahertz dielectric response and coupled dynamics of ferroelectrics and multiferroics from effective Hamiltonian simulations
Creators: name: Wang, Dawei
name: Weerasinghe, Jeevaka
name: Albarakati, Abdullah
name: Bellaiche, L.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Ferroelectric and multiferroic materials form an important class of functional materials. Over the last twenty years, first-principles-based effective Hamiltonian approaches have been successfully developed to simulate these materials. In recent years, effective Hamiltonian approaches were further combined with molecular dynamics methods to investigate terahertz dynamical properties of various perovskites. With this combination, a variety of ferroelectric and multiferroic materials, including BaTiO_{3}, Ba(Sr,Ti)O_{3}, Pb(Zr,Ti)O_{3}, BiFeO_{3}, and SrTiO_{3} bulks and films have been simulated, which led to the understanding of complex phenomena and discovery of novel effects. In this review, we first provide technical details about effective Hamiltonians and molecular dynamics simulation. Then, we present applications of the combination of these two techniques to different perovskites. Finally, we also briefly discuss possible future directions of this approach.
description: Dawei Wang et al, International Journal of Modern Physics B (2013)
A joint approach for reducing eccentricity and spurious gravitational radiation in binary black hole initial data construction
Creators: name: Zhang, Fan
name: Szilágyi, Béla
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: At the beginning of binary black hole simulations, there is a pulse of spurious radiation (or junk radiation) resulting from the initial data not matching astrophysical quasi-equilibrium inspiral exactly. One traditionally waits for the junk radiation to exit the computational domain before taking physical readings, at the expense of throwing away a segment of the evolution, and with the hope that junk radiation exits cleanly. We argue that this hope does not necessarily pan out as junk radiation could excite long-lived constraint violation. Another complication with the initial data is that it contains orbital eccentricity that needs to be removed, usually by evolving the early part of the inspiral multiple times with gradually improved input parameters. We show that this procedure is also adversely impacted by junk radiation. In this paper, we do not attempt to eliminate junk radiation directly, but instead tackle the much simpler problem of ameliorating its long-lasting effects. We report on the success of a method that achieves this goal by combining the removal of junk radiation and eccentricity into a single "joint-elimination" procedure. This approach has the following benefits: (1) We do not have to contend with the influence of junk radiation on eccentricity measurements for later iterations of the eccentricity reduction procedure. (2) We re-enforce constraints periodically by invoking the initial data solver, removing the constraint violation excited by junk radiation previously. (3) The wasted simulation segment associated with the junk radiation's evolution is absorbed into the eccentricity reduction iterations. Furthermore, (1) and (2) together allow us to carry out our joint-elimination procedure at low resolution, even when the subsequent "production run" is intended as a high resolution simulation.
description: 13 pages, 14 figures