cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Rice pyramided line IRBB67 (Xa4/Xa7) homeostasis under combined stress of high temperature and bacterial blight
Creators: name: Dossa, Gerbert Sylvestre
name: Quibod, Ian
name: Atienza-Grande, Genelou
name: Oliva, Ricardo
name: Maiss, Edgar
name: Vera Cruz, Casiana
name: Wydra, Kerstin
Publisher: name: London : Nature Publishing Group
Year: 2020
Subjects: subject: homeostasis
subject: inhibition
subject: rice
subject: bacterial blight (BB)
subject: pathogens
subject: genes
subject: stress
subject: Dewey Decimal Classification::500 | Naturwissenschaften
subject: Dewey Decimal Classification::600 | Technik

description: Rice bacterial blight (BB) caused by Xanthomonas oryzae pv. oryzae (Xoo) implies substantial yield loss to rice. In times of climate change, increasing temperatures are observed and further acceleration is expected worldwide. Increasing temperature often turns into inhibition of host plant defense to pathogens. Recently, a reduced resistance in rice IRBB4 carrying Xa4, but an increase in resistance in IRBB7 carrying Xa7 resistance by increasing temperature has been reported. Influence of high temperature on both R genes (Xa4+Xa7) combined in IRBB67 was analyzed under growth chamber conditions and transcriptomic analysis performed. The pyramided line IRBB67 showed no differences in lesion length between both temperature regimes, demonstrating that non-effectiveness of Xa4 at high temperature did not affect IRBB67 resistance. Moreover, Xa4 complements Xa7 resistance with no Xoo spread in planta beyond the symptomatic area under both temperature regimes in IRBB67. Time course transcriptomic analysis revealed that temperature enhanced IRBB67 resistance to combined heat and Xoo. Our findings highlight altered cellular compartments and point at a role of the cell wall involved in Xoo resistance and heat stress tolerance in both susceptible (IR24) and the resistant (IRBB67) NILs. Interestingly, up-regulation of trehalose-6-phosphatase gene and low affinity cation transporter in IRBB67 suggest that IRBB67 maintained a certain homeostasis under high temperature which may have enhanced its resistance. The interplay of both heat stress and Xoo responses as determined by up-regulated and down-regulated genes demonstrates how resistant plants cope with combined biotic and abiotic stresses. © 2020, The Author(s).
A Spatially Separable Attention Mechanism for massive MIMO CSI Feedback
Creators: name: Mourya, Sharan
name: Amuru, SaiDhiraj
name: Kuchi, Kiran Kumar
Publisher: name: arXiv
Year: 2022
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Channel State Information (CSI) Feedback plays a crucial role in achieving higher gains through beamforming. However, for a massive MIMO system, this feedback overhead is huge and grows linearly with the number of antennas. To reduce the feedback overhead several compressive sensing (CS) techniques were implemented in recent years but these techniques are often iterative and are computationally complex to realize in power-constrained user equipment (UE). Hence, a data-based deep learning approach took over in these recent years introducing a variety of neural networks for CSI compression. Specifically, transformer-based networks have been shown to achieve state-of-the-art performance. However, the multi-head attention operation, which is at the core of transformers, is computationally complex making transformers difficult to implement on a UE. In this work, we present a lightweight transformer named STNet which uses a spatially separable attention mechanism that is significantly less complex than the traditional full-attention. Equipped with this, STNet outperformed state-of-the-art models in some scenarios with approximately $1/10^{th}$ of the resources.
Entwicklung eines automatisierten routinetauglichen Bestimmungsverfahrens sowie Strukturaufklärung von Stoffwechselprodukten für Makrolid-Immunsuppressiva mit Hilfe von LC/Elektrospray MS
Creators: name: Vidal, Christian
Publisher: name: Hannover : Universität
Year: 1998
Subjects: subject: HPLC/electrospray-mass spectrometry (LC/ESI-MS)
subject: structural elucidation
subject: immunosuppressants
subject: Dewey Decimal Classification::600 | Technik::610 | Medizin, Gesundheit
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: [no abstract]
Numerische Modelle der Farley-Buneman-Instabilität im polaren Elektrojet
Creators: name: Vom Endt, Axel
Publisher: name: Hannover : Universität
Year: 1998
Subjects: subject: Farley-Buneman-instability
subject: ionosphere
subject: PIC-simulation
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: [no abstract]
Negative Baryon density and the Folding structure of the B=3 Skyrmion
Creators: name: Foster, David
name: Krusch, Steffen
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The Skyrme model is a non-linear field theory whose solitonic solutions, once quantised, describe atomic nuclei. The classical static soliton solutions, so-called Skyrmions, have interesting discrete symmetries and can only be calculated numerically. Mathematically, these Skyrmions can be viewed as maps between to two three-manifolds and, as such, their stable singularities can only be folds, cusps and swallowtails. Physically, the occurrence of singularities is related to negative baryon density. In this paper, we calculate the charge three Skyrmion to a high resolution in order to examine its singularity structure in detail. Thereby, we explore regions of negative baryon density. We also discuss how the negative baryon density depends on the pion mass.
description: 21 pages, 8 figures
Virtual grating approach for Monte Carlo simulations of edge illumination-based x-ray phase contrast imaging
Creators: name: Sanctorum, Jonathan
name: Sijbers, Jan
name: De Beenhouwer, Jan
Publisher: name: arXiv
Year: 2022
Subjects: subject: Medical Physics (physics.med-ph)
subject: Image and Video Processing (eess.IV)
subject: Optics (physics.optics)
subject: FOS: Physical sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: The design of new x-ray phase contrast imaging setups often relies on Monte Carlo simulations for prospective parameter studies. Monte Carlo simulations are known to be accurate but time consuming, leading to long simulation times, especially when many parameter variations are required. This is certainly the case for imaging methods relying on absorbing masks or gratings, with various tunable properties, such as pitch, aperture size, and thickness. In this work, we present the virtual grating approach to overcome this limitation. By replacing the gratings in the simulation with virtual gratings, the parameters of the gratings can be changed after the simulation, thereby significantly reducing the overall simulation time. The method is validated by comparison to explicit grating simulations, followed by representative demonstration cases.
description: 22 pages, 14 images
"so machet solches eine Democratiam" : Konflikt und Reformbestrebungen im reichsstädtischen Regiment Goslars 1666 - 1682
Creators: name: Kroker, Angelika
Publisher: name: Hannover : Universität
Year: 1997
Subjects: subject: Goslar
subject: early modern history
subject: constitutional conflicts
subject: frühneuzeitliche Geschichte
subject: Verfassungskonflikte
subject: Dewey Decimal Classification::900 | Geschichte und Geografie

description: [no abstract]
CP-violation, Asymmetries and Interferences in $t \bar{t} ϕ$
Creators: name: Azevedo, Duarte
name: Capucha, Rodrigo
name: Onofre, António
name: Santos, Rui
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We use the associated production of top-quark pairs with a generic scalar boson at the LHC to explore the sensitivity of a large set of observables to the sign of the CP mixing angle, present in the coupling between the scalar boson and the top quarks. The mass of the scalar boson is set to $m_ϕ=125$ GeV and its coupling to top-quarks is varied such that $α=$ 0$^\circ$, 22.5$^\circ$, 45.0$^\circ$, 67.5$^\circ$, 90.0$^\circ$, 135.0$^\circ$ and 180.0$^\circ$. Dileptonic final states of the $t\bar{t}ϕ$ system are used, with the scalar boson decaying as $ϕ\rightarrow b\bar{b}$. A new method to reconstruct the scalar mass, originally designed for the low mass regime is used, improving the resolution of the Higgs mass by roughly a factor of two. A full phenomenological analysis is performed using Standard Model background and signal events generated with MadGraph5aMC@NLO and reconstructed using a kinematical fit. The most sensitive CP-observables are selected to compute Confidence Level (CL) limits as a function of the sign of the top quark Yukawa couplings to the scalar boson. We also explore the sensitivity to interference terms using differential distributions and angular asymmetries. Given the significant difference between the pure scalar and pure pseudo-scalar production cross section values, it is unlikely the $t\bar{t}ϕ$ channel alone will be sensitive to the sign of the CP-mixing angle or interference terms, even at the end of the LHC. Using the $b_2^{t\bar{t}ϕ}$ and $b_4^{t\bar{t}ϕ}$ variables, exclusion limits at 95\% CL for the CP-even and CP-odd components of the top quark Yukawa couplings are expected to be set to $\tildeκ \in$ [-0.698,+0.698] and $|κ| \in$ [0.878,1.04], respectively, at the end of the High Luminosity phase of the LHC (HL-LHC) by using the dileptonic decay channel alone.
description: 21 pages, 9 figures
Spontaneous Increase of Magnetic Flux and Chiral-Current Reversal in Bosonic Ladders: Swimming against the Tide
Creators: name: Greschner, Sebastian
name: Piraud, M.
name: Heidrich-Meisner, F.
name: McCulloch, I.P.
name: Schollwöck, U.
name: Vekua, T.
Publisher: name: College Park, MD : American Physical Society
Year: 2015
Subjects: subject: Bosons
subject: Ground state
subject: Magnetic flux
subject: Bosonic particles
subject: Counterclockwise directions
subject: Interacting particles
subject: Many-body systems
subject: Quantum particles
subject: Spontaneous symmetry breaking
subject: Translational symmetry
subject: Vortex lattices
subject: Magnetism
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: The interplay between spontaneous symmetry breaking in many-body systems, the wavelike nature of quantum particles and lattice effects produces an extraordinary behavior of the chiral current of bosonic particles in the presence of a uniform magnetic flux defined on a two-leg ladder. While noninteracting as well as strongly interacting particles, stirred by the magnetic field, circulate along the system's boundary in the counterclockwise direction in the ground state, interactions stabilize vortex lattices. These states break translational symmetry, which can lead to a reversal of the circulation direction. Our predictions could readily be accessed in quantum gas experiments with existing setups or in arrays of Josephson junctions. © 2015 American Physical Society.
Robust Output Feedback Control Design in the Presence of Sporadic Measurements
Creators: name: Merco, Roberto
name: Ferrante, Francesco
name: Sanfelice, Ricardo G.
name: Pisu, Pierluigi
Publisher: name: arXiv
Year: 2022
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Output feedback control design for linear time-invariant systems in the presence of sporadic measurements and exogenous perturbations is addressed. To cope with the sporadic availability of measurements of the output, a hybrid dynamic output feedback controller equipped with a holding device whose state is reset when a new measurement is available is designed. The closed-loop system, resulting from the interconnection of the controller and the plant, is augmented with a timer variable triggering the arrival of new measurements and its properties are analyzed using hybrid system tools. Building upon Lyapunov theory for hybrid systems, sufficient conditions for internal and L2 input-to-output stability are proposed. An LMI-based design methodology for the co-design of the gains of the controller and the parameters of the holding device is presented. The effectiveness of the proposed LMI-based design approach is showcased in a numerical example.
description: Extended version of the paper accepted for publication in the IEEE Transactions on Automatic Control
Group of Seven Fish from the Shurin Tekagami (Illustrated Book of Fishes)
Creators: name: (:Unav)
Publisher: name: Columbia University
Year: 2019

description: Seven labels identify each fish as follows: top to bottom right, then left for group of four fish on the right: 1. 奴禮 Nure (species of Cottus [?]; n/a); 2. 義寸 Gisu (Deepsea bonefish; Pterothrissus gissu); 3. 無名 [name unknown] (Beauty goby; Pterogobius zacalles); 4. 頬長 Hōnaga (species of Actinopterygii, Ray-finned fishes; n/a); center: 5. 奈太 Nada (Moss moray; Enchelycore lichenosa); upper left: 6. 銕炮魚(伊左々) Teppōuo (Smooth flutemouth; Fistularia petimba); lower left: 7. 雄太刀魚 Otachiuo (Lowsail ribbonfish; Trachipterus ishikawae). For further clarification, consult the key to the image in the Art Properties curatorial file.
The Beta-Wishart Ensemble
Creators: name: Dubbs, Alexander
name: Edelman, Alan
name: Koev, Plamen
name: Venkataramana, Praveen
Publisher: name: arXiv
Year: 2013
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics

description: This paper proves a matrix model for the Wishart Ensemble with general covariance and general dimension parameter beta. In so doing, we introduce a new and elegant definition of Jack polynomials.
The stable climate of KELT-9b
Creators: name: Jones, K. D.
name: Morris, B. M.
name: Demory, B. -O.
name: Heng, K.
name: Hooton, M. J.
name: Billot, N.
name: Ehrenreich, D.
name: Hoyer, S.
name: Simon, A. E.
name: Lendl, M.
name: Demangeon, O. D. S.
name: Sousa, S. G.
name: Bonfanti, A.
name: Wilson, T. G.
name: Salmon, S.
name: Csizmadia, Sz.
name: Parviainen, H.
name: Bruno, G.
name: Alibert, Y.
name: Alonso, R.
name: Anglada, G.
name: Bárczy, T.
name: Navascues, D. Barrado y
name: Barros, S. C. C.
name: Baumjohann, W.
name: Beck, M.
name: Beck, T.
name: Benz, W.
name: Bonfils, X.
name: Brandeker, A.
name: Broeg, C.
name: Cabrera, J.
name: Charnoz, S.
name: Cameron, A. Collier
name: Davies, M. B.
name: Deleuil, M.
name: Deline, A.
name: Delrez, L.
name: Erikson, A.
name: Fortier, A.
name: Fossati, L.
name: Fridlund, M.
name: Gandolfi, D.
name: Gillon, M.
name: Güdel, M.
name: Isaak, K. G.
name: Kiss, L. L.
name: Laskar, J.
name: Etangs, A. Lecavelier des
name: Lovis, C.
name: Magrin, D.
name: Maxted, P. F. L.
name: Nascimbeni, V.
name: Olofsson, G.
name: Ottensamer, R.
name: Pagano, I.
name: Pallé, E.
name: Peter, G.
name: Piotto, G.
name: Pollacco, D.
name: Queloz, D.
name: Ragazzoni, R.
name: Rando, N.
name: Ratti, F.
name: Rauer, H.
name: Reimers, C.
name: Ribas, I.
name: Santos, N. C.
name: Scandariato, G.
name: Ségransan, D.
name: Smith, A. M. S.
name: Steller, M.
name: Szabó, Gy. M.
name: Thomas, N.
name: Udry, S.
name: Van Grootel, V.
name: Walter, I.
name: Walton, N. A.
name: Jungo, W. Wang
Publisher: name: arXiv
Year: 2022
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Even among the most irradiated gas giants, so-called ultra-hot Jupiters, KELT-9b stands out as the hottest planet thus far discovered with a dayside temperature of over 4500K. At these extreme irradiation levels, we expect an increase in heat redistribution efficiency and a low Bond albedo owed to an extended atmosphere with molecular hydrogen dissociation occurring on the planetary dayside. We present new photometric observations of the KELT-9 system throughout 4 full orbits and 9 separate occultations obtained by the 30cm space telescope CHEOPS. The CHEOPS bandpass, located at optical wavelengths, captures the peak of the thermal emission spectrum of KELT-9b. In this work we simultaneously analyse CHEOPS phase curves along with public phase curves from TESS and Spitzer to infer joint constraints on the phase curve variation, gravity-darkened transits, and occultation depth in three bandpasses, as well as derive 2D temperature maps of the atmosphere at three different depths. We find a day-night heat redistribution efficiency of $\sim$0.3 which confirms expectations of enhanced energy transfer to the planetary nightside due to dissociation and recombination of molecular hydrogen. We also calculate a Bond albedo consistent with zero. We find no evidence of variability of the brightness temperature of the planet, excluding variability greater than 1% (1$σ$).
description: 21 pages, 9 figures, accepted for publication in A&A
Accurate ionization potential of gold anionic clusters from density functional theory and many-body perturbation theory
Creators: name: Tanwar, A.
name: Fabiano, E.
name: Trevisanutto, P. E.
name: Chiodo, L.
name: Della Sala, F.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We present a theoretical study of the ionization potential in small anionic gold clusters, using density functional theory, with and without exact-exchange, and many body perturbation theory, namely the G0W0 approach. We find that G0W0 is the best approach and correctly describes the first ionization potential with an accuracy of about 0.1 eV.
description: 6 pages, 1 figure
Strukturanalyse der Zylinderbohrungsverzüge eines Vollaluminiummotors
Creators: name: May, Ralf Johannes
Publisher: name: Hannover : Universität
Year: 2000
Subjects: subject: Cylinder bore deformation
subject: FEM calculation
subject: connecting rod
subject: Dewey Decimal Classification::600 | Technik

description: [no abstract]
title: Scalable feature selection methods by augmenting sparse lease squares
Creators: name: Marvikhorasani, Hanieh
Publisher: name: Memorial University of Newfoundland
Year: 2019

description: Feature selection has been used widely for selecting a subset of genes (features) from
 microarray datasets, which help discriminate healthy samples from those with a particular
 disease. However, most feature selection methods suffer from high computational
 complexity when applied to these datasets due to the large number of genes present.
 Usually, a small subset of these genes have a contributing factor to the disease, and the
 rest of the genes are irrelevant to the condition. This study proposes a sparse method,
 Sparse Least Squares (SLS), based on singular value decomposition and least squares
 to filter out irrelevant features. In this thesis, we shall also consider reducing the number
 of features by clustering genes and selecting representative genes from each cluster
 based on two different metrics. These dataset size-reduction methods are incorporated
 into three state-of-the-art feature selection methods, namely, mRMR, SVM-RFE, and
 HSIC-Lasso. These methods are applied to three Inflammatory Bowel Disease (IBD)
 datasets and combined with support vector machines and random forest classifiers.
 Experimental results show that the proposed SLS method significantly reduces the
 running time of feature selection algorithms and improves the prediction power of
 the machine learning models. SLS is integrated into a novel feature selection method
 (DRPT), which, when combined with Support Vector Machine (SVM), is able to
 generate models to discriminate between healthy subjects and subjects with Ulcerative
 Colitis (UC) based on the expression values of genes in colon samples. The best models were validated on two validation datasets and achieving higher predictive performance
 than a model generated by a recently published biomarker discovery tool
 (BioDiscML).
Optimierung der photokatalytischen Wasserreinigung mit Titandioxid : Festkörper- und Oberflächenstruktur des Photokatalysators
Creators: name: Lindner, Martin
Publisher: name: Hannover : Universität
Year: 1997
Subjects: subject: Photocatalysis
subject: titanium dioxide
subject: water purification
subject: Photokatalyse
subject: Titandioxid
subject: Wasserreinigung
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: [no abstract]
Technische Aspekte der natürlichen Darstellung und Aufarbeitung von 4-Hydroxy-2,5-dimethyl-3(2H)-furan-3-on (Furaneol)
Creators: name: Pundsack, Edgar
Publisher: name: Hannover : Universität
Year: 2000
Subjects: subject: Furaneol
subject: natural synthesis
subject: zeolites
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: [no abstract]
Light-front approach to axial-vector quarkonium $γ^* γ^*$ form factors
Creators: name: Babiarz, Izabela
name: Pasechnik, Roman
name: Schäfer, Wolfgang
name: Szczurek, Antoni
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this work, we perform a detailed study of transition form factors for axial-vector meson production via the two-photon fusion process $γ^* γ^* \to 1^{++}$, with space-like virtual photons in the initial state and a $P$-wave axial-vector quarkonium in the final state. In this analysis, we employ the formalism of light-front quarkonium wave functions obtained from a solution of the Schrödinger equation for a selection of interquark potentials for $Q \bar Q$ interaction. We found the helicity structure and covariant decomposition of the matrix elements that can be generically applied for any $q \bar q$ axial-vector meson $γ^* γ^* \to 1^{++}$ transition, while our numerical results are given for the phenomenologically relevant charmonium $χ_{c1}$ state. We present the helicity form factors as functions of both photon virtualities. We also obtain, that $Q F_{\rm LT}(Q^2,0)/F_{\rm TT}(Q^2,0) = {\rm const.}$
description: 25 pages, 7 figures
title: Manipulating Elastic Waves in Topological Mechanical Metamaterials
Creators: name: Chanusali, Rajesh
Publisher: name: University of Washington
Year: 2018

description: Due to the recent discovery of topological insulators in condensed matter physics, a new notion of topology has emerged in association with the intrinsic dispersion behavior of a structure. In this work, we have taken this notion of topology and have shown some novel wave manipulation capabilities in one- and two-dimensional (1D and 2D) elastic systems. In particular, we have taken four different type of elastic systems. First, a 1D elastic system made of a highly tunable chain of granular particles, in which we analytically, numerically, and experimentally demonstrate an in situ topological band transition and existence of a topologically-protected vibration mode. Second, we take a 1D time-dependent system made of a granular chain, in which nonreciprocal wave dynamics is invoked. Using numerical simulations, we show that this nonreciprocity can be quantified by a topological invariant of 2D, i.e., Chern number. Third, we consider a 2D discrete lattice consisting of units inspired by the Stewart platform. By harnessing the bistability of the unit, we show the capability of in situ manipulation of wave path in this tunable 2D topological structure. We also demonstrate the uniqueness of topological waveguides in comparison to conventional (nontopological) waveguides in this platform. Lastly, we propose a continuum structure, i.e., a thin plate, with systematically arranged local resonators on its top. We show numerically that by judiciously arranging the local resonators, we can create a subwavelength topological waveguide in the system, which can robustly guide flexural waves along a path with sharp bends. In principle, this is analogous to the quantum spin Hall effect discovered in condensed matter physics. We employ a ubiquitous design of a bolted plate to experimentally demonstrate waveguiding capability of this plate. These results show that the new notion of topology -- emerging from topological insulators in electronic and optical systems -- can provide a fresh outlook towards manipulating elastic waves in mechanical structures, such as directional propagation, filtering, and localization of wave modes. These novel effects investigated in this study can be exploited for engineering applications such as impact mitigation, vibration isolation, smart sensing, and energy harvesting.
Superfluidity of a spin-imbalanced Fermi gas in a three-dimensional optical lattice
Creators: name: Mendoza, Rafael
name: Fortes, Mauricio
name: Solís, M. A.
name: Koinov, Zlatko
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We study fermion pairing in a population-imbalanced mixture of $^{6}$Li atomic gas loaded in a three-dimensional lattice at very low temperatures. Using the number equation for each population, the gap equation and the equation for the Helmholtz free energy, we determine the gap, chemical potentials and pair-momentum as functions of polarization. These parameters define the stability regions for: a Fulde-Ferrell-Larkin-Ovchinnikov phase; a phase separation region where BCS and normal phases coexist; a Sarma phase when the pair-momentum vanishes, and the transition to the normal phase when the gap disappears. The collective-mode energies are then calculated using a Bethe-Salpeter approach in the generalized random phase approximation assuming that the system is well described by the single-band Hubbard model. A novel result is that this fermionic gas has a superfluid phase revealed by rotonlike minima in the asymmetric collective-mode energy spectrum.
description: 8 pages, 5 figures
Die zeichnerische Entwicklung des Kindes im Übergang von der Kritzelphase zur Schemaphase
Creators: name: Meier-Sigwart, Mathias
Publisher: name: Hannover : Universität
Year: 1997
Subjects: subject: Development of the ability to draw
subject: early childhood
subject: language
subject: development of handling symbols
subject: children's drawing
subject: Zeichenentwicklung
subject: frühe Kindheit
subject: Sprache
subject: Symbolbildung
subject: Kinderzeichnungen
subject: Dewey Decimal Classification::100 | Philosophie::150 | Psychologie
subject: Dewey Decimal Classification::300 | Sozialwissenschaften, Soziologie, Anthropologie::370 | Erziehung, Schul- und Bildungswesen

description: [no abstract]
Rasterkraftmikroskopie-Untersuchungen an Isolator/Halbleiter-Systemen : die Wachstumsmorphologie von CaF2/Si(111)
Creators: name: Pietsch, Holger
Publisher: name: Hannover : Universität
Year: 1997
Subjects: subject: Insulator/semiconductor system
subject: growth
subject: UHV scanning force microscopy
subject: Isolator/Halbleiter System
subject: Wachstum
subject: UHV-Rasterkraftmikroskop
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: [no abstract]
title: Thermal, Interfacial, and Application Properties of Pea Protein Modified with High Intensity Ultrasound
Creators: name: Koosis, Aeneas
Publisher: name: University of Kentucky Libraries
Year: 2019

description: The overall objective of the study was to investigate different food ingredient conditions and ultrasound treatment on pea protein in terms of surface morphology and thermal characteristics. The motivation of this work was based on previous studies focusing on non-chemical physical modifications of plant proteins and the increasing demand for functional alternative proteins.
Ultrasonication time and amplitude, pH, protein concentration, and salt concentration all influenced the thermal and interfacial properties of pea protein. Ultrasound treatment altered the quaternary and tertiary structure of the storage protein and disrupted non-covalent bonds. The structural altercations and a reduction in particle size led to improved functionality.
For foams generated at pH 5.0 with 4% (w/v) ultrasound treated protein, the foams had acceptable capacity and stability even when high levels of sugar (5% sucrose) and salt (0.6 M) were incorporated. An acceptable angel food cake simulation can be achieved by replacing egg white with ultrasound treated pea protein. Color and loaf height were different, but similar texture profiles were achieved.
Ultrasound treatment significant improved the emulsifying capacity (up to 1.4 fold), emulsion stability, and creaming index compared to control samples (no ultrasound) over two weeks. The ultrasound treated emulsion yielded lower TBARS values, likely due to the change in exposed protein reactive groups.
These findings demonstrate that ultrasound processing is an effective nonchemical method to change the structural and physiochemical properties of pea protein. Pea protein processed with this method might allow for the functionality in a bakery, dressings, or beverage products, which is appealing to many consumers and manufacturers.
description: Copyright © Aeneas Koosis 2019
G306.3-0.9: A newly discovered young galactic supernova remnant
Creators: name: Reynolds, Mark
name: Loi, Shyeh
name: Murphy, Tara
name: Miller, Jon
name: Maitra, Dipankar
name: Gultekin, Kayhan
name: Gehrels, Neil
name: Kennea, Jamie
name: Siegel, Michael
name: Gelbord, Jonathan
name: Kuin, Paul
name: Moss, Vanessa
name: Reeves, Sarah
name: Robbins, William
name: Gaensler, Bryan
name: Reis, Rubens
name: Petre, Robert
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present X-ray and radio observations of the new Galactic supernova remnant (SNR) G306.3-0.9, recently discovered by Swift. Chandra imaging reveals a complex morphology, dominated by a bright shock. The X-ray spectrum is broadly consistent with a young SNR in the Sedov phase, implying an age of 2500 yr for a distance of 8 kpc, plausibly identifying this as one of the 20 youngest Galactic SNRs. Australia Telescope Compact Array (ATCA) imaging reveals a prominent ridge of radio emission that correlates with the X-ray emission. We find a flux density of ~ 160 mJy at 1 GHz, which is the lowest radio flux recorded for a Galactic SNR to date. The remnant is also detected at 24microns, indicating the presence of irradiated warm dust. The data reveal no compelling evidence for the presence of a compact stellar remnant.
description: 6 pages, 4 figures, 1 table, formatted using emulateapj.cls. Accepted for publication in ApJ
Schrittweiser Aufbau von Si-O-Gerüsten : Beiträge zur Untersuchung der Reaktion von SiCl4 mit O2
Creators: name: Wilkening, Andreas
Publisher: name: Hannover : Universität
Year: 1998
Subjects: subject: Chlorosiloxanes
subject: formation patterns
subject: high-temperature-reaction
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: [no abstract]
Chenopodium hybridum L.
Creators: name: Becherer
Publisher: name: Zenodo
Year: 1956
Subjects: Biodiversity
Taxonomy

description: T. hybridum L. Ssp. fistulosum (Gilib.) A. et G. (T. hybridum L. s. str.) Cat. 70. Kultiviert und vielfach verschleppt und sich einbürgernd; in neuerer Zeit sich stark ausbreitend, bis 1740 m. l: Illarsaz (J.); Vionnaz (J.); Muraz (J.); Les Marecottes (Coquoz); La Taillat (J-). - 2: Fully (Garns);Saillon (idem); Raron (Christ); Brigerbad (Becherer und Thommen 1955).- 3:]V[artigny (F.); Turtig (Christ); Visp (Becherer 1955); Zermatt und Umgebung, mehrfach, 1600-1740 m (idem 1944und 1945); Huteggen-Balen (A. Keller); Saas-Grund,1562m (Becherer 1940); Visperterminen, 1320 m (Becherer und Schatzmann 1949). - 3a: Festung Bleike bei Gabi (Becherer 1946). - 4: Unter Deisch (Becherer und Zwicky 1950). Ssp. elegans (Savi) A. et G. (T. elegans Savi) Cat. 70. Ruderal. l: Les Combassesbei Les Marecottes (J.). - 2: Eulaz ob Fully (F.); Bluche-Montana (Besse). - 3: Riddes-Bieudron (J.). Vgl. für die beiden Unterarten auch die Angabe BEAUVERD'S (Lit. 1940a, S. 430): « Trifolium elegans et T. hybridum L., aux environs de Salvan, des Marecottes et des Oranges.»
description: Published as part of Becherer, 1956, Florae Vallesiacae Supplementum, pp. 1-556 in Denkschriften der Schweizerischen Naturforschenden Gesellschaft 71 on pages 1-556
title: Bottomfish fishery-independent survey in Hawaii: Season and gear effects on abundance
titleType: Other
Creators: name: Swanson, Dione W.
name: Smith, Steven G. (Steven Glen)
name: Richards, Benjamin L.
name: Yau, Annie
name: Ault, Jerald S.
Publisher: name: United States. National Marine Fisheries Service, Pacific Islands Fisheries Science Center (U.S.)
Year: 2019

description: NOAA technical memorandum NMFS-PIFSC ; 88
Multi-frequency angular power spectrum of the 21~cm signal from the Epoch of Reionisation using the Murchison Widefield Array
Creators: name: Trott, Cathryn M.
name: Mondal, Rajesh
name: Mellema, Garrelt
name: Murray, Steven G.
name: Greig, Bradley
name: Line, Jack L. B.
name: Barry, Nichole
name: Morales, Miguel F.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The Multi-frequency Angular Power Spectrum (MAPS) is an alternative to spherically-averaged power spectra, and computes local fluctuations in the angular power spectrum without need for line-of-sight spectral transform. To test different approaches to MAPS and treatment of the foreground contamination, and compare with the spherically-averaged power spectrum, and the single-frequency angular power spectrum. We apply the MAPS to 110~hours of data in $z=6.2-7.5$ obtained for the Murchison Widefield Array Epoch of Reionisation experiment to compute the statistical power of 21~cm brightness temperature fluctuations. In the presence of bright foregrounds, a filter is applied to remove large-scale modes prior to MAPS application, significantly reducing MAPS power due to systematics. The MAPS shows a contrast of 10$^2$--10$^3$ to a simulated 21~cm cosmological signal for spectral separations of 0--4~MHz after application of the filter, reflecting results for the spherically-averaged power spectrum. The single-frequency angular power spectrum is also computed. At $z=7.5$ and $l=200$, we find an angular power of 53~mK$^2$, exceeding a simulated cosmological signal power by a factor of one thousand. Residual spectral structure, inherent to the calibrated data, and not spectral leakage from large-scale modes, is the dominant source of systematic power bias. The single-frequency angular power spectrum yields slightly poorer results compared with the spherically-averaged power spectrum, having applied a spectral filter to reduce foregrounds. Exploration of other filters may improve this result, along with consideration of wider bandwidths.
description: 9 pages, 9 figures; accepted for publication in Astronomy & Astrophysics
title: The Right to Secession in the Kenyan Context: Philosophical Reflections, with Special Reference to Non-Dominant Ethnic Groups
titleType: Other
Creators: name: Oduor, Reginald M. J.
Publisher: name: Politika.io
Year: 2019

description: The debate on the right to secession is part of the discourse on a people’s right to self-determination. Nevertheless, secessionist bids are more often than not very costly in terms of lives and property, as existing states unleash their power in an attempt to retain control of territories to which they lay claim. In the Kenyan context, secession has come to the fore at various points in the country’s post-colonial history – with regard to the Kenyan Somalis of the former North-Eastern Province in the 1960s, the Kalenjin in the Rift Valley in the wake of the victory of the National Rainbow Coalition (NARC) in 2002, ethnic groups at the Kenyan coast early in this century, and among ethnic groups allied to the opposition in the wake of the disputed 2017 General Elections. Consequently, this article undertakes philosophical reflection on the question as to whether or not there are circumstances in which disgruntled ethnic groups in Kenya may be morally justified to launch secessionist bids.
Monte Carlo radiative transfer with explicit absorption to simulate absorption, scattering, and stimulated emission
Creators: name: Baes, Maarten
name: Camps, Peter
name: Matsumoto, Kosei
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Context: The Monte Carlo method is probably the most widely used approach to solve the radiative transfer problem, especially in a general 3D geometry. The physical processes of emission, absorption, and scattering are easily incorporated in the Monte Carlo framework. Net stimulated emission, or absorption with a negative cross section, does not fit this method, however. Aims: We explore alterations to the standard photon packet life cycle in Monte Carlo radiative transfer that allow the treatment of net stimulated emission without loss of generality or efficiency. Methods: We present the explicit absorption technique that allows net stimulated emission to be handled efficiently. It uses the scattering rather than the extinction optical depth along a photon packet's path to randomly select the next interaction location, and offers a separate, deterministic treatment of absorption. We implemented the technique in a special-purpose Monte Carlo code for a two-stream 1D radiative transfer problem and in the fully featured 3D code SKIRT, and we studied its overall performance using quantitative statistical tests. Results: Our special-purpose code is capable of recovering the analytical solutions to the two-stream problem in all regimes, including the one of strong net stimulated emission. The implementation in SKIRT is straightforward, as the explicit absorption technique easily combines with the variance reduction and acceleration techniques already incorporated. In general, explicit absorption tends to improve the efficiency of the Monte Carlo routine in the regime of net absorption. Conclusions: Explicit absorption allows the treatment of net stimulated emission in Monte Carlo radiative transfer, it interfaces smoothly with... (abridged)
description: 14 pages, accepted for publication in A&A
Protein-Protein-Interaktionen des G-CSFR
Creators: name: Mohr, Andrea
Publisher: name: Hannover : Universität
Year: 2000
Subjects: subject: G-CSFR
subject: protein-protein-interaction
subject: yeast two-hybrid system
subject: Dewey Decimal Classification::500 | Naturwissenschaften::570 | Biowissenschaften, Biologie
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie
subject: Dewey Decimal Classification::600 | Technik::610 | Medizin, Gesundheit

description: [no abstract]
Entstehung exhalierter Tröpfchen in den terminalen Atemwegen
Creators: name: Haslbeck, Karsten
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2011
Subjects: subject: Exhaled droplets
subject: free surface flow
subject: liquid sheet
subject: Exhalierte Tröpfchen
subject: freie Oberfläche
subject: dünner Flüssigkeitsfilm
subject: Volume of Fluid (VOF)
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: [no abstract]
Supersymmetric large-order perturbation with the Nicolai map
Creators: name: Lechtenfeld, Olaf
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: In rigidly supersymmetric quantum theories, the Nicolai map allows one to turn on a coupling constant (from zero to a finite value) by keeping the (free) functional integration measure but subjecting the fields to a particular nonlocal and nonlinear transformation. A recursive perturbative construction of the Nicolai-transformed field configuration expresses it as a power series in the coupling, with its coefficient function at order $n$ being a sum of particular tree diagrams. For a quantum-mechanical example, the size of these tree diagrams (under a certain functional norm) is estimated by the $(n{+}1)$st power of the field size, and their number grows like $n^{-3/2}\times4.967^{\;n}$. Such an asymptotic behavior translates to a finite convergence radius for the formal perturbative expansion of the Nicolai map, which establishes its non-perturbative existence. The known factorial growth of the number of Feynman diagrams for quantum correlators is reproduced by the combinatorics of free-field Wick contractions as usual. We expect our results to extend to higher dimensions, including super Yang-Mills theory.
description: 1+7 pages, v2: minor corrections, matches published version
Multichannel generalization of eigen-phase preserving supersymmetric transformations
Creators: name: Pupasov-Maksimov, Andrey M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We generalize eigen-phase preserving (EPP) supersymmetric (SUSY) transformations to $N>2$ channel Schrödinger equation with equal thresholds. It is established that EPP SUSY transformations exist only in the case of even number of channels, $N=2M$. A single EPP SUSY transformation provides an $M(M-1)+2$ parametric deformation of the matrix Hamiltonian without affecting eigen-phase shifts of the scattering matrix.
description: 14 pages, 3 figures
Medium induced jet broadening in a quantum computer
Creators: name: Barata, João
name: Du, Xiaojian
name: Li, Meijian
name: Qian, Wenyang
name: Salgado, Carlos A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: QCD jets provide one of the best avenues to extract information about the quark-gluon plasma produced in the aftermath of ultra relativistic heavy ions collisions. The structure of jets is determined by multiparticle quantum interference hard to tackle using perturbative methods. When jets evolve in a QCD medium this interference pattern is modified, adding another layer of complexity. By taking advantage of the recent developments in quantum technologies, such effects might be better understood via direct quantum simulation of jet evolution. In this work, we introduce a precursor to such simulations. Based on the light-front Hamiltonian formalism, we construct a digital quantum circuit that tracks the evolution of a single hard probe in the presence of a stochastic color background. In terms of the jet quenching parameter $\hat q$, the results obtained using classical simulators of ideal quantum computers agree with known analytical results. With this study, we hope to provide a baseline for future in-medium jet physics studies using quantum computers.
Restructuring of the Ge(100) surface by Na chains
Creators: name: Ernst, Wolfgang
name: Jonas, K.-L.
name: Von Oeynhausen, V.
name: Tegenkamp, Christoph
name: Pfnür, Herbert
Publisher: name: College Park, MD : American Physical Society
Year: 2003
Subjects: subject: alkali
subject: dimer
subject: germanium
subject: sodium
subject: article
subject: chemical structure
subject: concentration response
subject: desorption
subject: electron diffraction
subject: energy
subject: modulation
subject: scanning tunneling microscopy
subject: surface property
subject: temperature dependence
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: The Na-induced surface structures on Ge(100) at concentrations below 0.1 monolayer (ML) have been investigated with low-energy electron diffraction and with scanning tunneling microscopy (STM). Annealing and partial desorption of higher coverages at temperatures between 650 and 680 K lead to the formation of characteristic chain structures, alternating between uncovered Ge dimer or double dimer rows and Na chains. The Na atoms have a preferential distance of three Ge lattice constants along the chains, but there is little correlation between different chains. Locally, only commensurate distances between Na chains of 4, 6 and 8 Ge lattice constants have been detected, with average distances being either commensurate or incommensurate, depending on the Na concentration. STM suggests complete removal of Ge-dimer rows below adsorbed Na chains. These alkali induced chainlike and well ordered self-organized modulations can be used as templates to impose these structures onto adsorbed ultra-thin insulating films. © 2003 The American Physical Society
Fostering open dialogue in the classroom
Creators: name: Sosa, Karla
name: Notar, Julia
name: Eily, Ariana
Publisher: name: figshare
Year: 2020
Subjects: Uncategorized

description: Handout with general guidelines on how foster open dialogue in STEM classrooms. It was generated as part of the programming done by the Duke Biology Inclusion, Diversity, Equity and Anti-Racism (IDEA) Graduate Committee.
Surface brightness-colour relations of dwarf stars from detached eclipsing binaries -- I. Calibrating sample
Creators: name: Graczyk, D.
name: Pietrzyński, G.
name: Galan, C.
name: Southworth, J.
name: Gieren, W.
name: Kałuszyński, M.
name: Zgirski, B.
name: Gallenne, A.
name: Górski, M.
name: Hajdu, G.
name: Karczmarek, P.
name: Kervella, P.
name: Maxted, P. F. L.
name: Nardetto, N.
name: Narloch, W.
name: Pilecki, B.
name: Pych, W.
name: Garcia, G. Rojas
name: Storm, J.
name: Suchomska, K.
name: Taormina, M.
name: Wielgórski, P.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Surface brightness -- colour relations (SBCRs) are very useful tools for predicting the angular diameters of stars. They offer the possibility to calculate very precise spectrophotometric distances by the eclipsing binary method or the Baade-Wesselink method. Double-lined Detached Eclipsing Binary stars (SB2 DEBs) with precisely known trigonometric parallaxes allow for a calibration of SBCRs with unprecedented precision. In order to improve such calibrations, it is important to enlarge the calibration sample of suitable eclipsing binaries with very precisely determined physical parameters. We carefully chose a sample of ten SB2 DEBs in the solar neighbourhood which contain inactive main-sequence components. The components have spectral types from early A to early K. All systems have high-precision parallaxes from the Gaia mission. We analysed high precision ground- and space-based photometry simultaneously with the radial velocity curves derived from HARPS spectra. We used spectral disentangling to obtain the individual spectra of the components and used these to derive precise atmospheric parameters and chemical abundances. For almost all components, we derived precise surface temperatures and metallicities. We derived absolute dimensions for 20 stars with an average precision of 0.2% and 0.5% for masses and radii, respectively. Three systems show slow apsidal motion. One system, HD 32129, is most likely a triple system with a much fainter K6V companion. Also three systems contain metallic-line components and show strong enhancements of barium and ittrium. The components of all systems compare well to the SBCR derived before from the detached eclipsing binary stars. With a possible exception of HD 32129, they can be used to calibrate SBCRs with a precision better than 1% with available Gaia DR3 parallaxes.
description: Accepted in Astronomy & Astrophysics, 18 pages