cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Large Scale Suppression of Scalar Power on a Spatial Condensation
Creators: name: Kouwn, Seyen
name: Kwon, O-Kab
name: Oh, Phillial
Publisher: name: arXiv
Year: 2014
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Suppression of the scalar power spectrum on large scales is one way to reconcile the tension between Planck and BICEP2 data. This suppression can occur by introducing a phase transition from the fast-roll phase to the slow-roll phase in a single field inflation model. In this paper we consider a deformed single field inflation model in terms of three SO(3) symmetric moduli fields. We find that spatially linear solutions for the moduli fields induces a phase transition during the early stage of the inflation and the suppression of scalar power spectrum at large scale perturbation modes.
description: 20 pages, 3 figures. Revised version, accepted for publication in PRD
Zwischen neuem Somatismus und Leibferne
Creators: name: Gerl-Falkovitz, Hanna-Barbara
Publisher: name: Internationale katholische Zeitschrift Communio
Year: 2022

description: Internationale katholische Zeitschrift Communio, Bd. 30 Nr. 3 (2001): Internationale katholische Zeitschrift Communio, Band 30, Heft 3
Correlation Functions of Massless Interacting Scalar Fields in de Sitter Space
Creators: name: Rajaraman, Arvind
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We examine the behavior of correlation functions for a massless scalar field in de Sitter space with a quartic interaction. We find that two-loop corrections are relevant, and that the resummation of these corrections generates a complicated structure whereby high momentum modes stay massless while low momentum modes develop a dynamical mass.
description: 10 pages, references added
Quasi-matter domination parameters in bouncing cosmologies
Creators: name: Elizalde, Emili
name: Haro, Jaume
name: Odintsov, Sergei D.
Publisher: name: arXiv
Year: 2014
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: For bouncing cosmologies, a fine set of parameters is introduced in order to describe the nearly matter dominated phase, and which play the same role that the usual slow-roll parameters play in inflationary cosmology. It is shown that, as in the inflation case, the spectral index and the running parameter for scalar perturbations in bouncing cosmologies can be best expressed in terms of these small parameters. Further, they explicitly exhibit the duality which exists between a nearly matter dominated Universe in its contracting phase and the quasi de Sitter regime in the expanding one. The results obtained also confirm and extend the known evidence that the spectral index for a matter dominated Universe in the contracting phase is, in fact, the same as the spectral index for an exact Sitter regime in the expanding phase. Finally, in both the inflationary and the matter bounce scenarios, the theoretical values of the spectral index and of the running parameter are compared with their experimental counterparts, obtained from the most recent PLANCK data, with the result that the bouncing models here discussed do fit well accurate astronomical observations.
description: Version accepted for publication in Physical Review D
Charged Higgs boson in the $W^\pm$ Higgs channel at the Large Hadron Collider
Creators: name: Enberg, Rikard
name: Klemm, William
name: Moretti, Stefano
name: Munir, Shoaib
name: Wouda, Glenn
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In light of the recent discovery of a neutral Higgs boson, $H_{\rm obs}$, with a mass near 125 GeV, we reassess the LHC discovery potential of a charged Higgs boson, $H^\pm$, in the $W^\pm H_{\rm obs}$ decay channel. This decay channel can be particularly important for a $H^\pm$ heavier than the top quark, when it is produced through the $pp \rightarrow tH^\pm$ process. The knowledge of the mass of $H_{\rm obs}$ provides an additional handle in the kinematic selection when reconstructing a Breit-Wigner resonance in the $H_{\rm obs} \rightarrow b\bar{b}$ decay channel. We consider some extensions of the Standard Model Higgs sector, with and without supersymmetry, and perform a dedicated signal-to-background analysis to test the scope of this channel for the LHC running at the design energy (14 TeV), for 300/fb (standard) and 3000/fb (high) integrated luminosities. We find that, while this channel does not show much promise for a supersymmetric $H^\pm$ state, significant portions of the parameter spaces of several two-Higgs doublet models are testable.
description: 26 pages, 11 figures. Typos corrected and some references added. Version to appear in NPB
Miniature Fast Steering Mirrors (FSM) for Space Optical Communication in NanoSats and CubeSats
Creators: name:  SYLVAIN CHARDON
name:   TIMOTEO PAYRE
name:   HUGO GRARDEL
name:   YANN QUENTEL
name:   MATHIEU THOMACHOT
name:   GERALD AIGOUY
name:   FRANK CLAEYSSEN
Publisher: name: Proceedings of the Aerospace Europe Conference - EUCASS - CEAS - 2023
Year: 2023
Subjects: FAST STEERING MIRROR
POINTING AHEAD MECHANISM
OPTICAL COMMUNICATION
FEEDER LINK
RASTER SCAN
LINE OF SIGHT STABILIZATION

description: CTEC proposes am ini-FSM technology offering a stroke of +/-6 mrad and a resonant frequency of 1700 Hz, with a mass of 50 gr. This FSM mechanism is a good candidate for giant constellations and all applications on board NanoSats and CubeSats, featuring a very high level of miniaturization and optimized for New Space high quantities cost efficiency. The use of piezo actuators offers a high resonance frequency for optimal control, with almost zero power consumption in step and stay pointing, and with very high-reliability figures 0,995 demonstrated over years of recurrent manufacturing for Optronics applications at CTEC.
Die falsche Demut des unzureichenden Wissens
Creators: name: Lobkowicz, Nikolaus
Publisher: name: Internationale katholische Zeitschrift Communio
Year: 2022

description: Internationale katholische Zeitschrift Communio, Bd. 30 Nr. 3 (2001): Internationale katholische Zeitschrift Communio, Band 30, Heft 3
On a class of translation-invariant spaces of quasianalytic ultradistributions
Creators: name: Dimovski, Pavel
name: Prangoski, Bojan
name: Vindas, Jasson
Publisher: name: arXiv
Year: 2015
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: Primary 46F05. Secondary 46H25, 46F10, 46F15, 46E10

description: A class of translation-invariant Banach spaces of quasianalytic ultradistributions is introduced and studied. They are Banach modules over a Beurling algebra. Based on this class of Banach spaces, we define corresponding test function spaces $\mathcal{D}^*_E$ and their strong duals $\mathcal{D}'^*_{E'_{\ast}}$ of quasianalytic type, and study convolution and multiplicative products on $\mathcal{D}'^*_{E'_{\ast}}$. These new spaces generalize previous works about translation-invariant spaces of tempered (non-quasianalytic ultra-) distributions; in particular, our new considerations apply to the settings of Fourier hyperfunctions and ultrahyperfunctions. New weighted $\mathcal{D}'^{\ast}_{L^{p}_η}$ spaces of quasianalytic ultradistributions are analyzed.
description: 32 pages
Wheeler-DeWitt Equation for 4D Supermetric and ADM with Massless Scalar Field as Internal Time
Creators: name: Perlov, Leonid
Publisher: name: arXiv
Year: 2014
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The main result of this paper is the 4-dimensional supermetric version of the Wheeler-DeWitt equation, that uses only one time variable for the both roles - as internal time and for the ADM split, as Hamiltonian evolution parameter. We study the ADM split with respect to the scalar massless field serving as internal time. The 4-dimensional hyper-surfaces $Σ_{ϕ= const}$ span the 5-dimensional space with the scalar field being the fifth coordinate. As a result we obtain the analog of the Wheeler-DeWitt equation for the 4-dimensional supermetric. We compare the ADM action with the non-compactified Kaluza-Klein action for the same physical space and obtain the equation for the extrinsic curvature and the scalar massless field.
Mixing and transport of metals by gravitational instability-driven turbulence in galactic discs
Creators: name: Petit, Antoine C.
name: Krumholz, Mark R.
name: Goldbaum, Nathan J.
name: Forbes, John C.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Metal production in galaxies traces star formation, and is highly concentrated toward the centers of galactic discs. This suggests that galaxies should have inhomogeneous metal distributions with strong radial gradients, but observations of present-day galaxies show only shallow gradients with little azimuthal variation, implying the existence of a redistribution mechanism. We study the role of gravitational instability-driven turbulence as a mixing mechanism by simulating an isolated galactic disc at high resolution, including metal fields treated as passive scalars. Since any cylindrical field can be decomposed into a sum of Fourier-Bessel basis functions, we set up initial metal fields characterized by these functions and study how different modes mix. We find both shear and turbulence contribute to mixing, but the mixing strongly depends on the symmetries of the mode. Non-axisymmetric modes have decay times smaller than the galactic orbital period because shear winds them up to small spatial scales, where they are erased by turbulence. The decay timescales for axisymmetric modes are much greater, though for all but the largest-scale inhomogeneities the mixing timescale is still short enough to erase chemical inhomogeneities over cosmological times. These different timescales provide an explanation for why galaxies retain metallicity gradients while there is almost no variation at a fixed radius. Moreover, the comparatively long timescales required for mixing axisymmetric modes may explain the greater diversity of metallicity gradients observed in high redshift galaxies as compared to local ones: these systems have not yet reached equilibrium between metal production and diffusion.
description: 10 pages, 13 figures
Enantioselective Synthesis of Alpha-Quaternary Aldehydes Through Copper-Catalyzed Allyl Additions to Methylformate
Creators: name: Mason, Miles Morgan
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2023

description: We have developed and optimized an enantioselective copper catalyzed allylation of methyl formate allowing for the stereoselective direct synthesis of alpha quaternary aldehydes. This method allows for access to acyclic all carbon quaternary centers. This method is a significant advance over current nucleophilic allylation methods that utilize allenes to generate similar copper allyl nucleophiles due to the enantioselectivity even with similar sized alkyl groups. Functionalization of these aldehydes, was necessary for the isolation of the products in good yield. Transformations including cross coupling, and reductive amination, and Pictet-Spengler cyclization and provide interesting molecules in a single step after allylation.
Extracting the transversity distributions from single-hadron and dihadron production
Creators: name: Martin, Anna
name: Bradamante, Franco
name: Barone, Vincenzo
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present a point-by-point determination of the valence transversity distributions from two different types of processes: single-hadron production and dihadron production, both in semi-inclusive deep inelastic scattering and e+e- annihilation. The extraction is based on some simple assumptions and does not require any parametrization. The transversity distributions obtained from Collins effect in single-hadron production and from interference effects in dihadron production are found to be compatible with each other.
description: 16 pages, 7 figures; added references
CONTEMPORARY ISSUES IN GREEN AND SUSTAINABLE PRACTICES AND ARTIFICIAL INTELLIGENCE- A COMPARATIVE STUDY OF POLICIES, IMPLEMENTATION, CHALLENGES, AND BENEFITS ACROSS DIFFERENT ORGANIZATIONS IN GHANA.pdf
Creators: name: ASIAMAH-BOATENG, AARON
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 350307
subject: Technology management
classificationCode: 350607
subject: Marketing technology
classificationCode: 460299
subject: Artificial intelligence not elsewhere classified

description: This research seeks to explore the strategies and encounters of five varied organizations in Ghana concerning current issues in Green and Sustainable Practices and Artificial Intelligence. The organizations under examination comprise the Electricity Company of Ghana, Judicial Service of Ghana, Prudential Bank Limited, Zeepay Ghana Limited, and IT Consortium
Additional file 1 of RETRACTED ARTICLE: Combination of sorafenib and gadolinium chloride (GdCl3) attenuates dimethylnitrosamine(DMN)-induced liver fibrosis in rats
Creators: name: Liu, Cheng
name: Yang, Zongguo
name: Wang, Lei
name: Lu, Yunfei
name: Tang, Bozong
name: Miao, Hui
name: Xu, Qingnian
name: Chen, Xiaorong
Publisher: name: figshare
Year: 2022
Subjects: subject: Biophysics
subject: Biochemistry
subject: Medicine
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Physiology
subject: Pharmacology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Immunology
subject: FOS: Clinical medicine
subject: Cancer
subject: Hematology
subject: 110309 Infectious Diseases
subject: FOS: Health sciences
subject: 60506 Virology

description: Primers used for PCR. Table S2. Effects of sorafenib plus GdCl3 on body, liver and spleen weights in DMN-induced rat liver fibrosis (mean ± sd). Table S3. the effects of sorafenib, GdCl3, and sorafenib plus GdCl3 on liver function. (DOCX 123 kb)
MPEC 2023-F208 : 2023 FF7
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2023
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2023 FF7

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Long-timescale simulations of H$_2$O admolecule diffusion on Ice Ih(0001) surfaces
Creators: name: Pedersen, Andreas
name: Karssemeijer, Leendertjan
name: Cuppen, Herma M.
name: Jónsson, Hannes
Publisher: name: arXiv
Year: 2015
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Long-timescale simulations of the diffusion of a H$_2$O admolecule on the (0001) basal plane of ice Ih were carried out over a temperature range of 100 to 200 K using the adaptive kinetic Monte Carlo method and TIP4P/2005f interaction potential function. The arrangement of dangling H atoms was varied from the proton-disordered surface to the perfectly ordered Fletcher surface. A large variety of sites was found leading to a broad distribution in adsorption energy at both types of surfaces. Up to 4 % of the sites on the proton-disordered surface have an adsorption energy exceeding the cohesive energy of ice Ih. The mean squared displacement of a simulated trajectory at 175 K for the proton-disordered surface gave a diffusion constant of 6$\cdot$10$^{-10}$ cm$^2$/s, consistent with an upper bound previously reported from experimental measurements. During the simulation, dangling H atoms were found to rearrange so as to reduce clustering, thereby approaching a linear Fletcher type arrangement. Diffusion on the perfectly ordered Fletcher surface was estimated to be significantly faster, especially in the direction along the rows of dangling hydrogen atoms. From simulations over the range in temperature, an effective activation energy of diffusion was estimated to be 0.16 eV and 0.22 eV for diffusion parallel and perpendicular to the rows, respectively. Even a slight disruption of the rows of the Fletcher surface made the diffusion isotropic.
description: 24 pages, 8 figures, 1 table
KARIs Additive Rocket Engine Initiative for Low-Cost and Sustainable Access to Space
Creators: name:  LIM BYOUNGJIK
name:   LEE KEEJOO
name:   LEE KEUM-OH
name:   LEE JUNSEONG
name:   PARK JAESUNG
Publisher: name: Proceedings of the Aerospace Europe Conference - EUCASS - CEAS - 2023
Year: 2023
Subjects: LIQUID ROCKET ENGINE
METHANE
ADDITIVE MANUFACTURING
POWDER BED FUSION
DIRECTED ENERGY DEPOSITION

description: In this paper, we will describe the additively manufactured liquid rocket engine components for the KARI\'s affordable and eco-friendly space transportation initiative. And we also introduce the current development status of thrust chamber and other components. Several thrust chamber parts have been manufactured by the additive manufacturing technologies, which are laser powder bed fusion(L-PBF) and powder directed energy deposition(p-DED), with the materials of pure copper, Inconel718, and CuCrZr for L-PBF and Al.bronze and Inconel 625 for p-DED. And manufactured thrust chambers had been conducted firing tests. Turbopump for 30 kN thrust liquid rocket engine is also under design and planning to be manufactured through additive manufacturing. Additionally, feasibility and applicability of additive manufacturing to engine nozzle extension, high-pressure vessels, heat exchanger and thrust frame has been evaluated and verified.
Privacy and Market Failures: Three Reasons for Concern, and Three Reasons for Hope
Creators: name: Acquisti, Alessandro
Publisher: name: Carnegie Mellon University
Year: 2020
Subjects: subject: 80602 Computer-Human Interaction
subject: FOS: Psychology
subject: Economics

description: The opening panel at the University of Colorado—Boulder’s “Economics of Privacy” Conference was asked to tackle an important but perilous question: Is there a market failure for information privacy? The question is perilous, because the term “market failure” is unfortunately used, and misused, to refer to different things (from market outcomes that are not Pareto efficient, correctly; to, incorrectly, any market outcome one happens not to like); but so is also (notoriously) the term “privacy.” The question, however, is also important: it calls us to consider whether market forces can adequately “protect” information privacy—and, in turn, what should be the essence of such protection, and what level of protection may be considered adequate. Hence, the initial query can be rephrased as: Will market forces be able to maintain a desirable balance between privacy and disclosure, in a world where most of our personal and professional lives unfold trails of electronic data, and where powerful economic interests favor information availability over information protection?
Additional file 1 of Masked nocturnal hypertension as a result of high prevalence of non-dippers among apparently well-controlled hypertensive patients with type 2 diabetes mellitus: data from a prospective study
Creators: name: Călin, Pop
name: Viorel, Manea
name: Luchiana, Pruna
name: Mihaela, Cosma
name: Lavinia, Pop
Publisher: name: figshare
Year: 2022
Subjects: subject: Physiology
subject: FOS: Biological sciences
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Immunology
subject: FOS: Clinical medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: Science Policy

description: Additional file1. STROBE Statement—Checklist of items that should be included in reports observational studies.
Contributions of the center vortices and vacuum domain in potentials between static sources
Creators: name: Nejad, Seyed Mohsen Hosseini
name: Deldar, Sedigheh
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this paper, we study the role of the domain structure of the Yang Mills vacuum. The Casimir scaling and $N$-ality are investigated in the potentials between static sources in various representations for $SU(2)$ and $SU(3)$ gauge groups based on the domain structure model using square ansatz for angle $α_{C}(x)$. We also discuss about the contributions of the vacuum domain and center vortices in the static potentials. As a result, the potentials obtained from vacuum domains agree with Casimir scaling better than the ones obtained from center vortices. The reasons of these observations are investigated by studying the behavior of the potentials obtained from vacuum domains and center vortices and the properties of the group factors. Then, the vacuum domains in $SU(N)$ and $G(2)$ gauge groups are compared and we argue that the $G(2)$ vacuum is filled with center vortices of its subgroups.
description: 27 pages, 17 figures, Resolutions of two figures are improved to conform to the version published in JHEP
UNDERSTANDING CONCUSSION REPORTING BEHAVIORS OF YOUNG ADULT ATHLETES WHEN THE CONCUSSION IS NON-SPORT-RELATED
Creators: name: Pierce, Megan Nicole
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2023

description: Concussions are a type of traumatic brain injury that largely depend on an individual’s symptom reporting to diagnose. Roughly fifty percent of athletes do not disclose concussion symptoms putting them at risk for further injury and long-term cognitive impairments. Researchers have historically focused on reporting behaviors among athletes who sustain sport-related concussions. This study aims to investigate the knowledge and reporting behaviors of athletes who experience sport-related and non-sport-related concussions through survey and interviews. The questionnaire was developed using previously validated survey questions and the follow-up interview followed a semi-structured format. It was hypothesized that reporting behaviors would be negatively impacted for non-sport-related compared to sport-related concussions. Statistical analyses evaluated differences in reporting experience, intention to report, perceived control, and concussion knowledge between sport-related and non-sport-related concussions. The primary study findings demonstrated no significant differences in reporting outcomes between those who experienced a sport-related concussion, non-sport-related concussion, or no concussions.
Filling of magnetic-impurity-induced gap in topological insulators by potential scattering
Creators: name: Black-Schaffer, A. M.
name: Balatsky, A. V.
name: Fransson, J.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We show that the energy gap induced by ferromagnetically aligned magnetic impurities on the surface of a topological insulator can be filled, due to scattering off the non-magnetic potential of the impurities. In both a continuum surface model and a three-dimensional tight-binding lattice model, we find that the energy gap disappears already at weak potential scattering as impurity resonances add spectral weight at the Dirac point. This can help explain seemingly contradictory experimental results as to the existence of a gap.
description: 5 pages, 4 figures. Published version
Horyzons USA: Pilot Trial Findings and the Effect of the Alliance on Outcomes and Platform Usage
Creators: name: Stiles, Bryan
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2023

description: Digital interventions may serve unmet needs in first episode psychosis (FEP), especially in the presence of a high-quality therapeutic alliance. We evaluated a pilot trial of the Horyzons digital intervention and the effect of the alliance on social recovery outcomes and platform usage. Users found the intervention acceptable and feasible. A higher overall alliance facilitated decreases in loneliness and social anxiety, as well as higher completion of therapy activities and authoring of comments and reactions. A strong bond with an online therapist supported improvements in loneliness, social support, and social anxiety, as well as a higher number of reactions. A higher alliance with the platform’s tasks and goals facilitated reductions in social anxiety and a higher completion of therapy activities and reactions. These findings extend prior studies of Horyzons in the U.S. and provide preliminary support for the alliance as a mechanism of change in digital interventions for FEP.
A fast direct numerical simulation method for characterising hydraulic roughness
Creators: name: Chung, Daniel
name: Chan, Leon
name: MacDonald, Michael
name: Hutchins, Nicholas
name: Ooi, Andrew
Publisher: name: arXiv
Year: 2015
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We describe a fast direct numerical simulation (DNS) method that promises to directly characterise the hydraulic roughness of any given rough surface, from the hydraulically smooth to the fully rough regime. The method circumvents the unfavourable computational cost associated with simulating high-Reynolds-number flows by employing minimal-span channels (Jimenez & Moin 1991). Proof-of-concept simulations demonstrate that flows in minimal-span channels are sufficient for capturing the downward velocity shift, that is, the Hama roughness function, predicted by flows in full-span channels. We consider two sets of simulations, first with modelled roughness imposed by body forces, and second with explicit roughness described by roughness-conforming grids. Owing to the minimal cost, we are able to conduct DNSs with increasing roughness Reynolds numbers while maintaining a fixed blockage ratio, as is typical in full-scale applications. The present method promises a practical, fast and accurate tool for characterising hydraulic resistance directly from profilometry data of rough surfaces.
description: Published in the Journal of Fluid Mechanics
Development of low-shock separation systems for payload fairings
Creators: name:  CHRISTOPH KARL
name:   JOAO ESTEVES
name:   ALBERTO SANCHEZ CEBRIAN
name:   THOMAS KNODEL
Publisher: name: Proceedings of the Aerospace Europe Conference - EUCASS - CEAS - 2023
Year: 2023
Subjects: PAYLOAD FAIRINGS
SEPARATION SYSTEMS
LOW-SHOCK

description: Payload Fairings (PLF) protect the payload from aerodynamic and acoustic pressure, heat, and environmental influences during on-ground operations and the initial stages of flight. Once the launch vehicle has passed the dense atmosphere and the aerodynamic loads become negligible, the payload fairing is jettisoned to rn axirnize the overall pay load capacity of the launcher. Fairing separation systems traditionally rely on pyrotechnic solutions for both the horizontal and vertical separation planes. While such pyrotechnic separation systems are very reliable and compact owing to their high energy-to-mass ratio, they are typically associated with high cost and shock loads transferred to the adjacent structure, which limits the payload comfort and can often be a design driver for the structure. For the past years, Beyond Gravity (formerly RUAG Space) has been developing a novel low-shock separation and jettison system for future PLFs, which is based on discrete mechanical latches for the vertical and horizontal separation in corn bination with a hinge-guided rotational jettisoning of the fairing halves. The absence of pyrotechnics allows for significantly reducing the shock loads generated during separation, enabling satellite providers to increase the performance and capabilities of their payloads. Further advantages of this system include increased design freedom for the fairing structure as well as modularity, enabling scaling to different launch vehicle sizes at a lower development effort. This paper presents the main outcomes of the low-shock separation system development-mainly carried out in the frame ofESA\'s Future Launchers Preparatory Programme (FLPP)-and builds on previous work performed by Beyond Gravity on low-shock separation systems [2] -[ 4]. An overview of the development approach is given and key technical results from the development and qualification phase are shown, including global PLF design and analysis to assess the overall system performance under flight conditions. Furthermore, the developed latch-based solution is compared against a system architecture using an integrated clamp band for the horizontal separation, and an outlook is given on Beyond Gravity\'s future plans of transferring the developed technology to Europe\'s next generation medium launch vehicles.
Dissipative String Fluids
Creators: name: Schubring, Daniel
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Systems of interacting networks of strings such as cosmic strings or quantum vortices can be approximated in a certain regime as an anisotropic fluid with an equation of state depending on a conserved flux. The equations for ideal magnetohydrodynamics are shown to be another example of a fluid of this type. Previous work on these fluids is now extended to include dissipative effects. The new dissipative terms are discussed in terms of both standard resistive magnetohydrodynamics and small-scale structure formation in networks of cosmic strings. Conditions are derived for the stationary solutions of the fluid. The requirement of frame invariance restricts second-order corrections to the theory, and is used to calculate the speed of second sound for an idealized cosmic string model.
description: 26 pages, 1 figure; typos corrected
Twisted chiral de Rham complex, generalized geometry, and T-duality
Creators: name: Linshaw, Andrew
name: Mathai, Varghese
Publisher: name: arXiv
Year: 2014
Subjects: subject: Differential Geometry (math.DG)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: The chiral de Rham complex of Malikov, Schechtman, and Vaintrob, is a sheaf of differential graded vertex algebras that exists on any smooth manifold $Z$, and contains the ordinary de Rham complex at weight zero. Given a closed 3-form $H$ on $Z$, we construct the twisted chiral de Rham differential $D_H$, which coincides with the ordinary twisted differential in weight zero. We show that its cohomology vanishes in positive weight and coincides with the ordinary twisted cohomology in weight zero. As a consequence, we propose that in a background flux, Ramond-Ramond fields can be interpreted as $D_H$-closed elements of the chiral de Rham complex. Given a T-dual pair of principal circle bundles $Z, \widehat{Z}$ with fluxes $H, \widehat{H}$, we establish a degree-shifting linear isomorphism between a central quotient of the $i \mathbb{R}[t]$-invariant chiral de Rham complexes of $Z$ and $\widehat{Z}$. At weight zero, it restricts to the usual isomorphism of $S^1$-invariant differential forms, and induces the usual isomorphism in twisted cohomology. This is interpreted as T-duality in type II string theory from a loop space perspective. A key ingredient in defining this isomorphism is the language of Courant algebroids, which clarifies the notion of functoriality of the chiral de Rham complex.
description: 32 pages, to appear in Communications in Mathematical Physics
Adaptive Error Covariances Estimation Methods for Ensemble Kalman Filters
Creators: name: Zhen, Yicun
name: Harlim, John
Publisher: name: arXiv
Year: 2014
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics

description: This paper presents a computationally fast algorithm for estimating, both, the system and observation noise covariances of nonlinear dynamics, that can be used in an ensemble Kalman filtering framework. The new method is a modification of Belanger's recursive method, to avoid an expensive computational cost in inverting error covariance matrices of product of innovation processes of different lags when the number of observations becomes large. When we use only product of innovation processes up to one-lag, the computational cost is indeed comparable to a recently proposed method by Berry-Sauer's. However, our method is more flexible since it allows for using information from product of innovation processes of more than one-lag. Extensive numerical comparisons between the proposed method and both the original Belanger's and Berry-Sauer's schemes are shown in various examples, ranging from low-dimensional linear and nonlinear systems of SDE's and 40-dimensional stochastically forced Lorenz-96 model. Our numerical results suggest that the proposed scheme is as accurate as the original Belanger's scheme on low-dimensional problems and has a wider range of more accurate estimates compared to Berry-Sauer's method on L-96 example.
description: 53 pages, 9 figures
Der Dreifaltige Gott und die Schöpfung im philosophischen Denken
Creators: name: Tilliette, Xavier
Publisher: name: Internationale katholische Zeitschrift Communio
Year: 2022

description: Internationale katholische Zeitschrift Communio, Bd. 30 Nr. 2 (2001): Internationale katholische Zeitschrift Communio, Band 30, Heft 2
Natur und sittliches Handeln
Creators: name: Alkofer, Andreas-Pazifikus
Publisher: name: Internationale katholische Zeitschrift Communio
Year: 2022

description: Internationale katholische Zeitschrift Communio, Bd. 30 Nr. 2 (2001): Internationale katholische Zeitschrift Communio, Band 30, Heft 2
Compatible abelian symmetries in N-Higgs-Doublet Models
Creators: name: Nishi, C. C.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We analyze the compatibility between abelian symmetries acting in two different sectors of a theory using the Smith Normal Form method. We focus on N-Higgs-doublet models (NHDMs) and on the compatibility between symmetries in the Higgs potential and in the Yukawa interactions, which were separately analyzed previous works. It is shown that two equal (isomorphic) symmetry groups that act in two separate sectors are not necessarily compatible in the whole theory and an upper bound is found for the size of the group that can be implemented in the entire NHDM. We also develop useful techniques to analyze compatibility and extend a symmetry from one sector to another. Consequences to the supersymmetric case are briefly discussed.
description: v2: 40pp; some modifications in text, brief discussion on the supersymmetric case added; to appear in JHEP
Casimir-Polder induced Rabi oscillations
Creators: name: Donaire, M.
name: Gorza, M. -P.
name: Maury, A.
name: Guerout, R.
name: Lambrecht, A.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We show that the Casimir-Polder interaction may induce coherent oscillations between degenerate atomic states. We illustrate this effect by computing the Casimir-Polder induced Rabi frequency on a $^{87}$Rb atom as it interacts with a reflecting surface. The atom oscillates between two Zeeman sublevels of its ground state undergoing a periodic exchange of angular momentum with the vacuum photons.
description: minor corrections made to agree with the published version
Non-linear bond-operator theory and 1/d expansion for coupled-dimer magnets II: Antiferromagnetic phase and quantum phase transition
Creators: name: Joshi, Darshan G.
name: Vojta, Matthias
Publisher: name: arXiv
Year: 2014
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We extend to magnetically ordered phases a recently developed expansion in 1/d for coupled-dimer Heisenberg magnets, where d is the number of space dimensions. This extension utilizes generalized bond operators describing spin excitations on top of a reference state involving triplet condensates. We explicitly consider a model of dimers on a hypercubic lattice which displays, in addition to the paramagnetic singlet phase, a collinear antiferromagnetic phase for which we calculate static and dynamic observables at zero temperature. In particular, we show that the 1/d expansion smoothly connects the paramagnetic and antiferromagnetic phases and produces sensible results at and near the quantum phase transition point. Among others, we determine the dispersion and spectral-weight distribution of the amplitude (i.e. Higgs) mode of the ordered phase. In the limit of vanishing intra-dimer coupling, we connect our approach to spin-wave theory.
description: 20 pages, 7 figures; sequel to arXiv:1407.7870; (v2) minor errors corrected; final version as published
Simultaneous Explanation of the $R_K$ and $R(D^{(*)})$ Puzzles
Creators: name: Bhattacharya, Bhubanjyoti
name: Datta, Alakabha
name: London, David
name: Shivashankara, Shanmuka
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: At present, there are several hints of lepton flavor non-universality. The LHCb Collaboration has measured $R_K\equiv{\cal B}(B^+ \to K^+ μ^+ μ^-)/{\cal B}(B^+ \to K^+ e^+ e^-)$, and the BaBar Collaboration has measured $R(D^{(*)}) \equiv {\cal B}({\bar B} \to D^{(*)+} τ^- {\barν}_τ) / {\cal B}({\bar B} \to D^{(*)+} \ell^- {\barν}_\ell)$ ($\ell = e,μ$). In all cases, the experimental results differ from the standard model predictions by 2-3$σ$. Recently, an explanation of the $R_K$ puzzle was proposed in which new physics (NP) generates a neutral-current operator involving only third-generation particles. Now, assuming the scale of NP is much larger than the weak scale, this NP operator must be made invariant under the full $SU(3)_C \times SU(2)_L \times U(1)_Y$ gauge group. In this Letter, we note that, when this is done, a new charged-current operator can appear, and this can explain the $R(D^{(*)})$ puzzle. A more precise measurement of the double ratio $R(D)/R(D^*)$ can rule out this model.
description: 11 pages, text and citations added, version published in Phys. Lett. B
Proposal Preseantation
Creators: name: Dosho, Bedasa M
Publisher: name: Zenodo
Year: 2023
Subjects: Barley, heterosis, Pangenome

description: Presentation outline CV and Background:  Educational Background  Work Experiences Research project: Heterosis or hybrid vigour Barley Pangenome AIMS Work Plan(WP): WP1 - Production of F1 hybrids using half diallel WP2 - High molecular DNA extraction and sequencing WP2 - High molecular DNA extraction and sequencing WP3 - Testing of hybrid vigour WP4 - Data analysis References
Multi-phase Robust Optimization of a Hybrid Guidance Architecture for Launch Vehicles
Creators: name:  AKAN SELIM
name:   IBRAHIM OZKOL
Publisher: name: Proceedings of the Aerospace Europe Conference - EUCASS - CEAS - 2023
Year: 2023
Subjects: ROBUST TRAJECTORY

description: A novel computational framework is developed to optimize both robust open-loop and closed-loop guidance modes under uncertainties. Multi-phase launch vehicle optimization problems, including achieving insertion into a Geostationary-Transfer Orbit (GTO) and executing a Return to Launch Site (RTLS) maneuver under constraints is studied. The framework effectively considers uncertainties in thrust, aerodynamic coefficients, atmospheric density, and specific impulse by employing Stochastic-Collocation based Ensemble Pseudospectral Optimal Control Software (SC-EPOCS), Recovery Ensemble Control (REC), and Conjugate Unscented Transformation (CUT). This approach generates safe and optimal trajectories and trajectory reshaping strategies, thereby mitigating risks and minimizing state dispersions at the end of the open-loop guidance phase.
Additional file 1 of Effect of EARLY administration of DEXamethasone in patients with COVID-19 pneumonia without acute hypoxemic respiratory failure and risk of development of acute respiratory distress syndrome (EARLY-DEX COVID-19): study protocol for a randomized controlled trial
Creators: name: Franco-Moreno, Anabel
name: Acedo-Gutiérrez, María Soledad
name: Martín, Nicolás Labrador-San
name: Hernández-Blanco, Clara
name: Rodríguez-Olleros, Celia
name: Ibáñez-Estéllez, Fátima
name: Suárez-Simón, Ana
name: Balado-Rico, Mateo
name: Romero-Paternina, Ana Rocío
name: Alonso-Menchén, David
name: Escolano-Fernández, Belén
name: Piniella-Ruiz, Esther
name: Alonso-Monge, Ester
name: Notario-Leo, Helena
name: Bibiano-Guillén, Carlos
name: Peña-Lillo, Gabriela
name: Antiqueira-Pérez, Armando
name: Romero-Pareja, Rodolfo
name: Cabello-Clotet, Noemí
name: Estrada-Pérez, Vicente
name: Troya-García, Jesús
name: de Carranza-López, María
name: Escobar-Rodríguez, Ismael
name: Vallejo-Maroto, Nacho
name: Torres-Macho, Juan
Publisher: name: figshare
Year: 2022
Subjects: subject: Medicine
subject: Immunology
subject: FOS: Clinical medicine
subject: Developmental Biology
subject: Cancer
subject: 111714 Mental Health
subject: FOS: Health sciences
subject: 110309 Infectious Diseases
subject: 60506 Virology
subject: FOS: Biological sciences
subject: Computational Biology

description: Additional file 1. Ethics Committees Approval Document.
Multistable jittering in oscillators with pulsatile delayed feedback
Creators: name: Klinshov, Vladimir
name: Lücken, Leonhard
name: Shchapin, Dmitry
name: Nekorkin, Vladimir
name: Yanchuk, Serhiy
Publisher: name: arXiv
Year: 2015
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: Dynamical Systems (math.DS)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 37G15, 37N20, 92B25

description: Oscillatory systems with time-delayed pulsatile feedback appear in various applied and theoretical research areas, and received a growing interest in the last years. For such systems, we report a remarkable scenario of destabilization of a periodic regular spiking regime. In the bifurcation point numerous regimes with non-equal interspike intervals emerge simultaneously. We show that this bifurcation is triggered by the steepness of the oscillator's phase resetting curve and that the number of the emerging, so-called "jittering" regimes grows exponentially with the delay value. Although this appears as highly degenerate from a dynamical systems viewpoint, the "multi-jitter" bifurcation occurs robustly in a large class of systems. We observe it not only in a paradigmatic phase-reduced model, but also in a simulated Hodgkin-Huxley neuron model and in an experiment with an electronic circuit.
Multiple Images of a Highly Magnified Supernova Formed by an Early-Type Cluster Galaxy Lens
Creators: name: Kelly, Patrick L.
name: Rodney, Steven A.
name: Treu, Tommaso
name: Foley, Ryan J.
name: Brammer, Gabriel
name: Schmidt, Kasper B.
name: Zitrin, Adi
name: Sonnenfeld, Alessandro
name: Strolger, Louis-Gregory
name: Graur, Or
name: Filippenko, Alexei V.
name: Jha, Saurabh W.
name: Riess, Adam G.
name: Bradac, Marusa
name: Weiner, Benjamin J.
name: Scolnic, Daniel
name: Malkan, Matthew A.
name: von der Linden, Anja
name: Trenti, Michele
name: Hjorth, Jens
name: Gavazzi, Raphael
name: Fontana, Adriano
name: Merten, Julian
name: McCully, Curtis
name: Jones, Tucker
name: Postman, Marc
name: Dressler, Alan
name: Patel, Brandon
name: Cenko, S. Bradley
name: Graham, Melissa L.
name: Tucker, Bradley E.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: In 1964, Refsdal hypothesized that a supernova whose light traversed multiple paths around a strong gravitational lens could be used to measure the rate of cosmic expansion. We report the discovery of such a system. In Hubble Space Telescope imaging, we have found four images of a single supernova forming an Einstein cross configuration around a redshift z=0.54 elliptical galaxy in the MACS J1149.6+2223 cluster. The cluster's gravitational potential also creates multiple images of the z=1.49 spiral supernova host galaxy, and a future appearance of the supernova elsewhere in the cluster field is expected. The magnifications and staggered arrivals of the supernova images probe the cosmic expansion rate, as well as the distribution of matter in the galaxy and cluster lenses.
description: Published in the 6 March 2015 issue of Science; 17 pages, 7 figures, and 3 tables including Supplementary Materials
Additional file 2 of Effect of EARLY administration of DEXamethasone in patients with COVID-19 pneumonia without acute hypoxemic respiratory failure and risk of development of acute respiratory distress syndrome (EARLY-DEX COVID-19): study protocol for a randomized controlled trial
Creators: name: Franco-Moreno, Anabel
name: Acedo-Gutiérrez, María Soledad
name: Martín, Nicolás Labrador-San
name: Hernández-Blanco, Clara
name: Rodríguez-Olleros, Celia
name: Ibáñez-Estéllez, Fátima
name: Suárez-Simón, Ana
name: Balado-Rico, Mateo
name: Romero-Paternina, Ana Rocío
name: Alonso-Menchén, David
name: Escolano-Fernández, Belén
name: Piniella-Ruiz, Esther
name: Alonso-Monge, Ester
name: Notario-Leo, Helena
name: Bibiano-Guillén, Carlos
name: Peña-Lillo, Gabriela
name: Antiqueira-Pérez, Armando
name: Romero-Pareja, Rodolfo
name: Cabello-Clotet, Noemí
name: Estrada-Pérez, Vicente
name: Troya-García, Jesús
name: de Carranza-López, María
name: Escobar-Rodríguez, Ismael
name: Vallejo-Maroto, Nacho
name: Torres-Macho, Juan
Publisher: name: figshare
Year: 2022
Subjects: subject: Medicine
subject: Immunology
subject: FOS: Clinical medicine
subject: Developmental Biology
subject: Cancer
subject: 111714 Mental Health
subject: FOS: Health sciences
subject: 110309 Infectious Diseases
subject: 60506 Virology
subject: FOS: Biological sciences
subject: Computational Biology

description: Additional file 2. AEMPS Approval Document Spanish.
D-brane solitons in various dimensions
Creators: name: Gudnason, Sven Bjarke
name: Nitta, Muneto
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We construct a D-brane soliton, a composite topological soliton sharing some properties with a D-brane, in a Skyrme model in 4+1 dimensions, in which Skyrmions are strings ending on a domain wall. We further generalize this D-brane soliton to diverse dimensions. A string, carrying the $π_{N-1}$ topological charge, ends on a domain wall in an O(N) model with higher-derivative terms in N+1 dimensions.
description: RevTeX: 19 pages, 7 figures; V2: typos corrected