cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Room Temperature Quantum Spin Hall Insulators with a Buckled Square Lattice
Creators: name: Luo, Wei
name: Xiang, Hongjun
Publisher: name: arXiv
Year: 2015
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Two-dimensional (2D) topological insulators (TIs), also known as quantum spin Hall (QSH) insulators, are excellent candidates for coherent spin transport related applications because the edge states of 2D TIs are robust against nonmagnetic impurities since the only available backscattering channel is forbidden. Currently, most known 2D TIs are based on a hexagonal (specifically, honeycomb) lattice. Here, we propose that there exists the quantum spin Hall effect (QSHE) in a buckled square lattice. Through performing global structure optimization, we predict a new three-layer quasi-2D (Q2D) structure which has the lowest energy among all structures with the thickness less than 6.0 Å for the BiF system. It is identified to be a Q2D TI with a large band gap (0.69 eV). The electronic states of the Q2D BiF system near the Fermi level are mainly contributed by the middle Bi square lattice, which are sandwiched by two inert BiF2 layers. This is beneficial since the interaction between a substrate and the Q2D material may not change the topological properties of the system, as we demonstrate in the case of the NaF substrate. Finally, we come up with a new tight-binding model for a two-orbital system with the buckled square lattice to explain the low-energy physics of the Q2D BiF material. Our study not only predicts a QSH insulator for realistic room temperature applications, but also provides a new lattice system for engineering topological states such as quantum anomalous Hall effect.
description: 17pages, 4 figures Accepted by nano letters
Vaisala CL31 LCBR documentation
Creators: name: Unknown
Publisher: name: Zenodo
Year: 2012
Subjects: subject: https://id.loc.gov/authorities/subjects/sh2018002590.html
subject: https://id.loc.gov/authorities/subjects/sh85040468.html
subject: https://id.loc.gov/authorities/subjects/sh85084334.html

description: The Vaisala Ceilometer CL31 is a compact and lightweight instrument for cloud base height and vertical visibility measurements. It detects three cloud layers simultaneously. The CL31 employs a pulsed diode laser LIDAR (light detection and ranging) technology. The CL31 is ideal for aviation and meteorological applications.
description: Previously curated at: http://cedadocs.ceda.ac.uk/1240/ The publish date on this item was its original published date. This item was previously associated with content (as an official url) at: http://www.vaisala.com/en/Pages/default.aspx. Main files in this record: CL31_User's_Guide_M210482EN-F.pdf CL31-Datasheet-B210415EN-C-LOW-v1.pdf Item originally deposited with Centre for Environmental Data Analysis (CEDA) document repository by Miss Kate Winfield. Transferred to CEDA document repository community on Zenodo on 2022-11-24
High efficiency near diffraction-limited mid-infrared flat lenses based on metasurface reflectarrays
Creators: name: Zhang, Shuyan
name: Kim, Myoung-Hwan
name: Aieta, Francesco
name: She, Alan
name: Mansuripur, Tobias
name: Gabay, Ilan
name: Khorasaninejad, Mohammadreza
name: Rousso, David
name: Wang, Xiaojun
name: Troccoli, Mariano
name: Yu, Nanfang
name: Capasso, Federico
Publisher: name: arXiv
Year: 2016
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: A limiting factor in the development of mid-infrared optics is the lack of abundant materials that are transparent, low cost, lightweight, and easy to machine. In this paper, we demonstrate a metasurface device that circumvents these limitations. A flat lens based on antenna reflectarrays was designed to achieve near diffraction-limited focusing with a high efficiency (experiment: 80%, simulation: 83%) at 45(o) incidence angle at λ = 4.6 μm. This geometry considerably simplifies the experimental arrangement compared to the common geometry of normal incidence which requires beam splitters. Simulations show that the effect of comatic aberrations is small compared to parabolic mirrors. The use of single-step photolithography allows large scale fabrication.
description: 9 pages
Simple and efficient representations for the fundamental solutions of Stokes flow in a half-space
Creators: name: Gimbutas, Zydrunas
name: Greengard, Leslie
name: Veerapaneni, Shravan
Publisher: name: arXiv
Year: 2015
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We derive new formulas for the fundamental solutions of slow, viscous flow, governed by the Stokes equations, in a half-space. They are simpler than the classical representations obtained by Blake and collaborators, and can be efficiently implemented using existing fast solvers libraries. We show, for example, that the velocity field induced by a Stokeslet can be annihilated on the boundary (to establish a zero slip condition) using a single reflected Stokeslet combined with a single Papkovich-Neuber potential that involves only a scalar harmonic function. The new representation has a physically intuitive interpretation.
Alyssum spinosum Linnaeus 1753
Creators: name: Jarvis, Charlie
Publisher: name: Zenodo
Year: 2007
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Brassicales
Brassicaceae
Alyssum
Alyssum spinosum

description: Alyssum spinosum Linnaeus, Species Plantarum 2: 650. 1753. "Habitat in Hispaniae, Galliae cautibus." RCN: 4727. Lectotype (Dudley in J. Arnold Arbor. 45: 365. 1964): Herb. Clifford: 332, Alyssum 1 (BM-000646287). Current name:  Alyssum spinosum L. (Brassicaceae).
description: Published as part of Jarvis, Charlie, 2007, Chapter 7: Linnaean Plant Names and their Types (part A), pp. 252-342 in Order out of Chaos. Linnaean Plant Types and their Types, London :Linnaean Society of London in association with the Natural History Museum on page 283, DOI: 10.5281/zenodo.291971
Impact of electrode density of states on transport through pyridine-linked single molecule junctions
Creators: name: Adak, Olgun
name: Korytár, Richard
name: Joe, Andrew Y.
name: Evers, Ferdinand
name: Venkataraman, Latha
Publisher: name: arXiv
Year: 2015
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study the impact of electrode band structure on transport through single-molecule junctions by measuring the conductance of pyridine-based molecules using Ag and Au electrodes. Our experiments are carried out using the scanning tunneling microscope based break-junction technique and are supported by density functional theory based calculations. We find from both experiments and calculations that the coupling of the dominant transport orbital to the metal is stronger for Au-based junctions when compared with Ag-based junctions. We attribute this difference to relativistic effects, which results in an enhanced density of d-states at the Fermi energy for Au compared with Ag. We further show that the alignment of the conducting orbital relative to the Fermi level does not follow the work function difference between two metals and is different for conjugated and saturated systems. We thus demonstrate that the details of the molecular level alignment and electronic coupling in metal-organic interfaces do not follow simple rules, but are rather the consequence of subtle local interactions.
Coluteocarpus vesicaria Holmboe
Creators: name: Jarvis, Charlie
Publisher: name: Zenodo
Year: 2007
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Brassicales
Brassicaceae
Coluteocarpus
Coluteocarpus vesicaria

description: Alyssum vesicaria Linnaeus, Species Plantarum 2: 651. 1753. "Habitat in Oriente." RCN: 4743. Lectotype (Al-Shehbaz & Turland in Cafferty & Jarvis in Taxon 51: 531. 2002): [icon] "Vesicaria Orientalis folds dentatis" in Tournefort, Rel. Voy. Levant (Paris ed.) 2: 252. 1717. Current name:  Coluteocarpus vesicaria (L.) Holmboe (Brassicaceae). Note: Hedge (in Hedge & Rechinger, Fl. Iranica 57: 97. 1968) indicated unspecified Tournefort material as type. However, as Linnaeus did not have the opportunity to study Tournefort’s specimens, this is not an original element for Linnaeus’ name.
description: Published as part of Jarvis, Charlie, 2007, Chapter 7: Linnaean Plant Names and their Types (part A), pp. 252-342 in Order out of Chaos. Linnaean Plant Types and their Types, London :Linnaean Society of London in association with the Natural History Museum on page 283, DOI: 10.5281/zenodo.291971
Jenoptik CHM15k Nimbus LCBR user guide - German version
Creators: name: Heinemann, Georg
Publisher: name: Zenodo
Year: 2014
Subjects: subject: https://id.loc.gov/authorities/subjects/sh2018002590.html
subject: https://id.loc.gov/authorities/subjects/sh85040468.html
subject: https://id.loc.gov/authorities/subjects/sh85084334.html

description: This is the German version of the Jenoptik CHM15k Nimbus LCBR user guide. The "NIMBUS" series is the second generation of proven CHM 15k ceilometers measuring aerosol height profiles using the LIDAR technique. They determine cloud base heights, penetration depths, mixing layer height and vertical visibility. Within their operating range of up to 15 kilometres (50 000 feet), they reliably detect multiple cloud layers and cirrus clouds. The "NIMBUS" series is equipped with an integrated controller offering improved range resolution and a comfortable web interface.
description: Previously curated at: http://cedadocs.ceda.ac.uk/1241/ The publish date on this item was its original published date. This item was previously associated with content (as an official url) at: http://www.jenoptik.com/en_home. Main files in this record: CHM15k_DE.pdf Item originally deposited with Centre for Environmental Data Analysis (CEDA) document repository by Miss Kate Winfield. Transferred to CEDA document repository community on Zenodo on 2022-11-24
Dissecting the Hydrolytic Activities of Sarcoplasmic Reticulum ATPase in the Presence of Acetyl Phosphate
Creators: name: Soler, F
name: Fortea, MI
name: Lax, A
name: Belda, F Fernandez
Publisher: name: arXiv
Year: 2024
Subjects: subject: Molecular Networks (q-bio.MN)
subject: FOS: Biological sciences

description: Sarcoplasmic reticulum vesicles and purified Ca$^{2+}$-ATPase hydrolyze acetyl phosphate both in the presence and absence of Ca$^{2+}$. The Ca$^{2+}$-independent activity was fully sensitive to vanadate, insensitive to thapsigargin, and proceeded without accumulation of phosphorylated enzyme. Acetyl phosphate hydrolysis in the absence of Ca$^{2+}$ was activated by dimethyl sulfoxide. The Ca$^{2+}$-dependent activity was partially sensitive to vanadate, fully sensitive to thapsigargin, and associated with steady phosphoenzyme accumulation. The Ca$^{2+}$/P(i) coupling ratio at neutral pH sustained by 10 mm acetyl phosphate was 0.57. Addition of 30% dimethyl sulfoxide completely blocked Ca$^{2+}$ transport and partially inhibited the hydrolysis rate. Uncoupling induced by dimethyl sulfoxide included the accumulation of vanadate-insensitive phosphorylated enzyme. When acetyl phosphate was the substrate, the hydrolytic pathway was dependent on experimental conditions that might or might not allow net Ca$^{2+}$ transport. The interdependence of both Ca$^{2+}$-dependent and Ca$^{2+}$-independent hydrolytic activities was demonstrated.
Amaranthus albus Linnaeus 1759
Creators: name: Jarvis, Charlie
Publisher: name: Zenodo
Year: 2007
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Caryophyllales
Amaranthaceae
Amaranthus
Amaranthus albus

description: Amaranthus albus Linnaeus, Systema Naturae, ed. 10, 2: 1268. 1759. ["Habitat in Philadelphiae maritimis."] Sp. Pl., ed. 2, 2: 1404 (1763). RCN: 7165. Lectotype (Raus in Strid & Kit Tan, Fl. Hellenica 1: 143. 1997): Herb. Linn. No. 1117.1 (LINN). Current name:  Amaranthus albus L. (Amaranthaceae).
description: Published as part of Jarvis, Charlie, 2007, Chapter 7: Linnaean Plant Names and their Types (part A), pp. 252-342 in Order out of Chaos. Linnaean Plant Types and their Types, London :Linnaean Society of London in association with the Natural History Museum on page 283, DOI: 10.5281/zenodo.291971
Lactucopsis deltoidea Sch. Bip.
Creators: name: Clementi, Moreno
name: Vukojičić, Snežana
name: Miola, Antonella
name: Niketić, Marjan
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Asterales
Asteraceae
Lactucopsis
Lactucopsis deltoidea

description: Lactucopsis deltoidea (M.Bieb.) Sch.Bip. in Visiani & Pančić (1870: 6), comb. inval.
 Note:—The new combination proposed by Schultz-Bipontinus is marked with a question mark (“?”). It is therefore invalid, having been proposed in anticipation of the future acceptance of a particular position of the taxon in question (Art. 36.1, McNeill et al. 2012).
 The following new combinations, also proposed by Schultz-Bipontinus in Visiani & Pančić (1870) are typified by the type of their basionyms (Art. 7.3, McNeill et al. 2012): Lactucopsis chaixii (Vill.) Sch.Bip. in Visiani & Pančić (1870: 6) ≡ Lactuca chaixii Vill. (1779: 32); Lactucopsis altissima (M.Bieb) Sch.Bip. in Visiani & Pančić (1870: 6) ≡ Lactuca altissima Bieberstein (1808: 242); Lactucopsis wilhelmsiana (Fisch. & C.A.Mey. ex DC.) Sch.Bip. in Visiani & Pančić (1870: 6) ≡ Lactuca wilhelmsiana Fisch. & C.A.Mey. ex De Candolle (1838: 134); Lactucopsis quercina (L.) Sch.Bip. in Visiani & Pančić (1870: 7) ≡ Lactuca quercina Linnaeus (1753: 795), Lactucopsis plumieri (L.) Sch. Bip. in Visiani & Pančić (1870: 8) ≡ Sonchus plumieri Linnaeus (1759: 1192).
description: Published as part of Clementi, Moreno, Vukojičić, Snežana, Miola, Antonella & Niketić, Marjan, 2016, Typification and nomenclature of the names published in Plantae Serbicae Rariores aut Novae-Decas III, pp. 85-98 in Phytotaxa 252 (2) on page 89, DOI: 10.11646/phytotaxa.252.2.1, http://zenodo.org/record/13676447
Variational Approach to Solving the Spectral Boltzmann Transport Equation in Transient Thermal Grating for Thin Films
Creators: name: Chiloyan, Vazrik
name: Zeng, Lingping
name: Huberman, Samuel
name: Maznev, Alexei A.
name: Nelson, Keith A.
name: Chen, Gang
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The phonon Boltzmann transport equation (BTE) is widely utilized to study non-diffusive thermal transport. We find a solution of the BTE in the thin film transient thermal grating (TTG) experimental geometry by using a recently developed variational approach with a trial solution supplied by the Fourier heat conduction equation. We obtain an analytical expression for the thermal decay rate that shows excellent agreement with Monte Carlo simulations. We also obtain a closed form expression for the effective thermal conductivity that demonstrates the full material property and heat transfer geometry dependence, and recovers the limits of the one-dimensional TTG expression for very thick films and the Fuchs-Sondheimer expression for very large grating spacings. The results demonstrate the utility of the variational technique for analyzing non-diffusive phonon-mediated heat transport for nanostructures in multi-dimensional transport geometries, and will assist the probing of the mean free path (MFP) distribution of materials via transient grating experiments.
description: 19 pages, 4 figures
Rotational cavity optomechanics
Creators: name: Bhattacharya, M.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We theoretically examine the optomechanical interaction between a rotating nanoparticle and an orbital angular momentum-carrying optical cavity mode. Specifically, we consider a dielectric nanosphere rotating uniformly in a ring-shaped optical potential inside a Fabry-Perot resonator. The motion of the particle is probed by a weak angular lattice, created by introducing two additional degenerate Laguerre-Gaussian cavity modes carrying equal and opposite orbital angular momenta. We demonstrate that the rotation frequency of the nanoparticle is imprinted on the probe optical mode, via the Doppler shift, and thus may be sensed experimentally using homodyne detection. We show analytically that the effect of the optical probe on the particle rotation vanishes in the regime of linear response, resulting in an accurate frequency measurement. We also numerically characterize the degradation of the measurement accuracy when the system is driven in the nonlinear regime. Our results are relevant to rotational Doppler velocimetry and to studies of rotational Brownian motion in a periodic lattice.
description: 7 pages, 2 figures, to appear in JOSA B
An integrated source of broadband quadrature squeezed light
Creators: name: Hoff, Ulrich B.
name: Nielsen, Bo M.
name: Andersen, Ulrik L.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: An integrated silicon nitride resonator is proposed as an ultra-compact source of bright single-mode quadrature squeezed light at 850 nm. Optical properties of the device are investigated and tailored through numerical simulations, with particular attention paid to loss associated with interfacing the device. An asymmetric double layer stack waveguide geometry with inverse vertical tapers is proposed for efficient and robust fibre-chip coupling, yielding a simulated total loss of -0.75 dB/facet. We assess the feasibility of the device through a full quantum noise analysis and derive the output squeezing spectrum for intra-cavity pump self-phase modulation. Subject to standard material loss and detection efficiencies, we find that the device holds promises for generating substantial quantum noise squeezing over a bandwidth exceeding 1 GHz. In the low-propagation loss regime, approximately -7 dB squeezing is predicted for a pump power of only 50 mW.
description: 23 pages, 12 figures
Analysis of Fisher Information and the Cramér-Rao Bound for Nonlinear Parameter Estimation after Compressed Sensing
Creators: name: Pakrooh, Pooria
name: Pezeshki, Ali
name: Scharf, Louis L.
name: Cochran, Douglas
name: Howard, Stephen D.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics

description: In this paper, we analyze the impact of compressed sensing with complex random matrices on Fisher information and the Cramér-Rao Bound (CRB) for estimating unknown parameters in the mean value function of a complex multivariate normal distribution. We consider the class of random compression matrices whose distribution is right-orthogonally invariant. The compression matrix whose elements are i.i.d. standard normal random variables is one such matrix. We show that for all such compression matrices, the Fisher information matrix has a complex matrix beta distribution. We also derive the distribution of CRB. These distributions can be used to quantify the loss in CRB as a function of the Fisher information of the non-compressed data. In our numerical examples, we consider a direction of arrival estimation problem and discuss the use of these distributions as guidelines for choosing compression ratios based on the resulting loss in CRB.
description: 12 pages, 3figures
Van der Waals density-functional theory study for bulk solids with BCC, FCC, and diamond structures
Creators: name: Park, Jinwoo
name: Yu, Byung Deok
name: Hong, Suklyun
Publisher: name: arXiv
Year: 2015
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Proper inclusion of van der Waals (vdW) interactions in theoretical simulations based on standard density functional theory (DFT) is crucial to describe the physics and chemistry of systems such as organic and layered materials. Many encouraging approaches have been proposed to combine vdW interactions with standard approximate DFT calculations. Despite many vdW studies, there is no consensus on the reliability of vdW methods. To help further development of vdW methods, we have assessed various vdW functionals through the calculation of structural prop- erties at equilibrium, such as lattice constants, bulk moduli, and cohesive energies, for bulk solids, including alkali, alkali-earth, and transition metals, with BCC, FCC, and diamond structures as the ground state structure. These results provide important information for the vdW-related materials research, which is essential for designing and optimizing materials systems for desired physical and chemical properties.
description: 10 pages, 6 Figures, 3 Tables
The nuclear symmetry energy and other isovector observables from the point of view of nuclear structure
Creators: name: Colo', G.
name: Roca-Maza, X.
name: Paar, N.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: In this contribution, we review some works related with the extraction of the symmetry energy parameters from isovector nuclear excitations, like the giant resonances. Then, we move to the general issue of how to assess whether correlations between a parameter of the nuclear equation of state and a nuclear observable are robust or not. To this aim, we introduce the covariance analysis and we discuss some counter-intuitive, yet enlightening, results from it.
description: To be published in the proceedings of the 2014 Zakopane Conference on Nuclear Physics (Acta Physica Polonica B)
MPEC 2024-R52 : 2024 RH1
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2024
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2024 RH1

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.
Inertial particle acceleration in strained turbulence
Creators: name: Lee, Chung-min
name: Gylfason, Ármann
name: Perlekar, Prasad
name: Toschi, Federico
Publisher: name: arXiv
Year: 2015
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: The dynamics of inertial particles in turbulence is modelled and investigated by means of direct numerical simulation of an axisymmetrically expanding homogeneous turbulent strained flow. This flow can mimic the dynamics of particles close to stagnation points. The influence of mean straining flow is explored by varying the dimensionless strain rate parameter $Sk_0/ε_0$ from 0.2 to 20. We report results relative to the acceleration variances and probability density functions for both passive and inertial particles. A high mean strain is found to have a significant effect on the acceleration variance both directly, through an increase in wave number magnitude, and indirectly, through the coupling of the fluctuating velocity and the mean flow field. The influence of the strain on normalized particle acceleration pdfs is more subtle. For the case of passive particle we can approximate the acceleration variance with the aid of rapid distortion theory and obtain good agreement with simulation data. For the case of inertial particles we can write a formal expressions for the accelerations. The magnitude changes in the inertial particle acceleration variance and the effect on the probability density function are then discussed in a wider context for comparable flows, where the effects of the mean flow geometry and of the anisotropy at the small scales are present.
Loxotropa cursitans var. alacris Kieffer 1911
Creators: name: Notton, David G.
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Diapriidae
Loxotropa
Loxotropa cursitans
Loxotropa cursitans var. alacris kieffer, 1911b: 916

description: Loxotropa cursitans var. alacris Kieffer, 1911b: 916.
Valid name
Basalys parvus Thomson, 1858.
Summary of types
Syntype ♀, BMNH number 9.729. Syntypes 2♀♀.
Primary type data
Eccles [illeg.]; Type; 208.; Cameron Coll./ 1910-55.; cursitans/ Kieff. (syntype ♀). Cladich; 210.; Cameron Coll./ 1910-55 (syntype ♀). 212; Cameron Coll./ 1909-182 (syntype ♀).
Type locality
Scotland.
Remarks
This variety was described from an unspecified number of females. Three syntypes were found, of which the one numbered as type 9.729 had erroneously been regarded as the type of L. cursitans q.v. by Masner (1965) and Nixon (1980). All syntypes have the wings reaching the basal quarter of the metasoma, a gradually expanded triangular marginal vein, and the head not higher than long and thus agree better with Kieffer’s description of L. cursitans var. alacris. All three syntypes are mounted on cards; syntype number 212 is missing part of the left antenna and part of the left fore tarsus and the other two syntypes are entire. The synonymy of this species with Basalys parvus Thomson, 1858, following Nixon’s (1980) interpretation of B. parvus, is confirmed here.
description: Published as part of Notton, David G., 2014, A catalogue of the types of Diapriinae (Hymenoptera, Diapriidae) at the Natural History Museum, London, pp. 1-123 in European Journal of Taxonomy 75 on pages 64-65, DOI: 10.5852/ejt.2014.75, http://zenodo.org/record/3862773
Determining the Phase and Amplitude Distortion of a Wavefront using a Plenoptic Sensor
Creators: name: Wu, Chensheng
name: Ko, Jonathan
name: Davis, Christopher C.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Optics (physics.optics)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: We have designed a plenoptic sensor to retrieve phase and amplitude changes resulting from a laser beam's propagation through atmospheric turbulence. Compared with the commonly restricted domain of (-pi, pi) in phase reconstruction by interferometers, the reconstructed phase obtained by the plenoptic sensors can be continuous up to a multiple of 2pi. When compared with conventional Shack-Hartmann sensors, ambiguities caused by interference or low intensity, such as branch points and branch cuts, are less likely to happen and can be adaptively avoided by our reconstruction algorithm. In the design of our plenoptic sensor, we modified the fundamental structure of a light field camera into a mini Keplerian telescope array by accurately cascading the back focal plane of its object lens with a microlens array's front focal plane and matching the numerical aperture of both components. Unlike light field cameras designed for incoherent imaging purposes, our plenoptic sensor operates on the complex amplitude of the incident beam and distributes it into a matrix of images that are simpler and less subject to interference than a global image of the beam. Then, with the proposed reconstruction algorithms, the plenoptic sensor is able to reconstruct the wavefront and a phase screen at an appropriate depth in the field that causes the equivalent distortion on the beam. The reconstructed results can be used to guide adaptive optics systems in directing beam propagation through atmospheric turbulence. In this paper we will show the theoretical analysis and experimental results obtained with the plenoptic sensor and its reconstruction algorithms.
description: This article has been accepted by JOSA A
Visualizing Object-oriented Software for Understanding and Documentation
Creators: name: AL-msie'deen, Ra'Fat
Publisher: name: arXiv
Year: 2016
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: Understanding or comprehending source code is one of the core activities of software engineering. Understanding object-oriented source code is essential and required when a programmer maintains, migrates, reuses, documents or enhances source code. The source code that is not comprehended cannot be changed. The comprehension of object-oriented source code is a difficult problem solving process. In order to document object-oriented software system there are needs to understand its source code. To do so, it is necessary to mine source code dependencies in addition to quantitative information in source code such as the number of classes. This paper proposes an automatic approach, which aims to document object-oriented software by visualizing its source code. The design of the object-oriented source code and its main characteristics are represented in the visualization. Package content, class information, relationships between classes, dependencies between methods and software metrics is displayed. The extracted views are very helpful to understand and document the object-oriented software. The novelty of this approach is the exploiting of code dependencies and quantitative information in source code to document object-oriented software efficiently by means of a set of graphs. To validate the approach, it has been applied to several case studies. The results of this evaluation showed that most of the object-oriented software systems have been documented correctly.
Amaranthus blitum Linnaeus 1753
Creators: name: Jarvis, Charlie
Publisher: name: Zenodo
Year: 2007
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Caryophyllales
Amaranthaceae
Amaranthus
Amaranthus blitum

description: Amaranthus blitum Linnaeus, Species Plantarum 2: 990. 1753. "Habitat in Europa temperatiore." RCN: 7175. Lectotype (Fillias & al. in Taxon 29: 150. 1980): Herb. Linn. No. 1117.14, right specimen (LINN). Current name:  Amaranthus blitum L. (Amaranthaceae). Note: Brenan & Townsend (in Taxon 29: 695. 1980) proposed the rejection of A. blitum. However, the Committee for Spermatophyta (in Taxon 33: 298. 1984) declined to recommend the proposal.
description: Published as part of Jarvis, Charlie, 2007, Chapter 7: Linnaean Plant Names and their Types (part A), pp. 252-342 in Order out of Chaos. Linnaean Plant Types and their Types, London :Linnaean Society of London in association with the Natural History Museum on page 283, DOI: 10.5281/zenodo.291971
Functional approach to the catalytic site of the sarcoplasmic reticulum Ca(2+)-ATPase: binding and hydrolysis of ATP in the absence of Ca(2+)
Creators: name: Lax, A
name: Soler, F
name: Belda, F Fernandez
Publisher: name: arXiv
Year: 2024
Subjects: subject: Molecular Networks (q-bio.MN)
subject: FOS: Biological sciences

description: Isolated sarcoplasmic reticulum vesicles in the presence of Mg(2+) and absence of Ca(2+) retain significant ATP hydrolytic activity that can be attributed to the Ca(2+)-ATPase protein. At neutral pH and the presence of 5 mM Mg(2+), the dependence of the hydrolysis rate on a linear ATP concentration scale can be fitted by a single hyperbolic function. MgATP hydrolysis is inhibited by either free Mg(2+) or free ATP. The rate of ATP hydrolysis is not perturbed by vanadate, whereas the rate of p-nitrophenyl phosphate hydrolysis is not altered by a nonhydrolyzable ATP analog. ATP binding affinity at neutral pH and in a Ca(2+)-free medium is increased by Mg(2+) but decreased by vanadate when Mg(2+) is present. It is suggested that MgATP hydrolysis in the absence of Ca(2+) requires some optimal adjustment of the enzyme cytoplasmic domains. The Ca(2+)-independent activity is operative at basal levels of cytoplasmic Ca(2+) or when the Ca(2+) binding transition is impeded.
Transport of a dilute active suspension in pressure-driven channel flow
Creators: name: Ezhilan, Barath
name: Saintillan, David
Publisher: name: arXiv
Year: 2015
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Physical sciences

description: Confined suspensions of active particles show peculiar dynamics characterized by wall accumulation, as well as upstream swimming, centerline depletion and shear-trapping when a pressure-driven flow is imposed. We use theory and numerical simulations to investigate the effects of confinement and non-uniform shear on the dynamics of a dilute suspension of Brownian active swimmers by incorporating a detailed treatment of boundary conditions within a simple kinetic model where the configuration of the suspension is described using a conservation equation for the probability distribution function of particle positions and orientations, and where particle-particle and particle-wall hydrodynamic interactions are neglected. Based on this model, we first investigate the effects of confinement in the absence of flow, in which case the dynamics is governed by a swimming Peclet number, or ratio of the persistence length of particle trajectories over the channel width, and a second swimmer-specific parameter whose inverse measures the strength of propulsion. In the limit of weak and strong propulsion, asymptotic expressions for the full distribution function are derived. For finite propulsion, analytical expressions for the concentration and polarization profiles are also obtained using a truncated moment expansion of the distribution function. In agreement with experimental observations, the existence of a concentration/polarization boundary layer in wide channels is reported and characterized, suggesting that wall accumulation in active suspensions is primarily a kinematic effect which does not require hydrodynamic interactions. Next, we show that application of a pressure-driven Poiseuille flow leads to net upstream swimming of the particles relative to the flow, and an analytical expression for the mean upstream velocity is derived in the weak flow limit. In stronger imposed flows ......
Fast and Provably Accurate Bilateral Filtering
Creators: name: Chaudhury, Kunal N.
name: Dabhade, Swapnil D.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: The bilateral filter is a non-linear filter that uses a range filter along with a spatial filter to perform edge-preserving smoothing of images. A direct computation of the bilateral filter requires $O(S)$ operations per pixel, where $S$ is the size of the support of the spatial filter. In this paper, we present a fast and provably accurate algorithm for approximating the bilateral filter when the range kernel is Gaussian. In particular, for box and Gaussian spatial filters, the proposed algorithm can cut down the complexity to $O(1)$ per pixel for any arbitrary $S$. The algorithm has a simple implementation involving $N+1$ spatial filterings, where $N$ is the approximation order. We give a detailed analysis of the filtering accuracy that can be achieved by the proposed approximation in relation to the target bilateral filter. This allows us to to estimate the order $N$ required to obtain a given accuracy. We also present comprehensive numerical results to demonstrate that the proposed algorithm is competitive with state-of-the-art methods in terms of speed and accuracy.
description: To appear in IEEE Transactions on Image Processing (10 pages, 10 figures, 4 tables)
Solar neutrinos as background in dark matter searches involving electron detection
Creators: name: Thomas, A.
name: Vergados, J. D.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In the present work we estimate the potential background of solar neutrinos on electron detectors. These detectors are considered relevant for detecting light dark matter particles in the MeV region, currently sought by experiments. We find that the copious low energy pp neutrinos are a dangerous background at the energies involved in these experiments, in fact close to the anticipated event rate, while the more energetic Boron neutrinos are harmless
description: 12 pages, 5 figures, Journal of Physics G: Nuclear and Particle Physics, Volume 43, Number 7,Published 19 May 2016. arXiv admin note: text overlap with arXiv:1605.05413
A new least squares adjustment approach for the determination of linear meteor trajectories
Creators: name: Margonis, Anastasios
name: Malissiovas, Georgios
name: Neitzel, Frank
name: Oberst, Jürgen
Publisher: name: Technische Universität Berlin
Year: 2022
Subjects: subject: 500 Naturwissenschaften und Mathematik::520 Astronomie::520 Astronomie und zugeordnete Wissenschaften
subject: meteorites
subject: meteors
subject: meteoroids
subject: methods: analytical
subject: planets and satellites: atmospheres

description: Context. Precise astrometric measurements performed on meteor images are required to derive the dynamical parameters of a mete-oroid. As a consequence, the measurements carried out in this initial step will have a strong impact on the dynamical solution of an orbiting meteoroid. These measurements relate to the position of the meteor defined by the positions of pixels along its path, as well as by their uncertainties. Therefore, the use of all available information is of great importance for the subsequent processing steps. Aims. This paper examines a new geometrical approach for computing the trajectory of a meteor from multi-station observations. The model considers a more general weighting scheme based on existing stochastic information from the measurements, including the geometry between each station and the observed meteor. Methods. We present a novel mathematical model for least squares adjustment of the linear meteor trajectories within the Gauss-Helmert model, which allows the use of stochastic information from the measured direction vectors from multiple stations. Additionally, an extended stochastic model is presented that takes into account the geometric relationship between each station and the observed meteor as a weight component for each group of observations. Results. The solution of the new approach is demonstrated on a synthetic meteor example, with observations generated from multiple stations with differing precision. The geometric configuration of the stations has been chosen in such a way that it creates the necessity to include stochastic information for the observed direction vectors for a realistic solution. The results of the newly developed approach are compared with those from established methods in the literature. Future investigations and optimisations for developing an even more improved meteor trajectory model are being addressed.
Jenoptick CHM15k Nimbus ceilometer data sheet
Creators: name: Heinemann, Georg
Publisher: name: Zenodo
Year: 2015
Subjects: subject: lidar
subject: ceilometer
subject: data sheet
subject: https://id.loc.gov/authorities/subjects/sh2018002590.html

description: Data Sheet for the Jenoptick CHM15k "Nimbus" ceilometer
description: Previously curated at: http://cedadocs.ceda.ac.uk/1243/ The publish date on this item was its original completed date. This item was previously associated with content (as an official url) at: http://www.jenoptik.com/en_home. Main files in this record: CHM15k_Datasheet.pdf Item originally deposited with Centre for Environmental Data Analysis (CEDA) document repository by Georg Heinemann. Transferred to CEDA document repository community on Zenodo on 2022-11-24
A time-domain deconvolution technique for meteor photometry applied to double-station CCD image data
Creators: name: Christou, Apostolos A.
name: Margonis, Anastasios
name: Oberst, Jürgen
Publisher: name: Technische Universität Berlin
Year: 2015
Subjects: subject: 500 Naturwissenschaften und Mathematik::520 Astronomie::520 Astronomie und zugeordnete Wissenschaften
subject: methods: data analysis
subject: methods: numerical
subject: techniques: photometric
subject: meteorites
subject: meteors
subject: meteoroids

description: Aims. We describe a new algorithm for extracting photometric information from meteor images. Methods. The time history of a moving point source of variable brightness is explicitly deconvolved from the spatial distribution of the meteor signal on the image. The method can be applied to time-integrated meteor images if kinematic information is independently available or, alternatively, assumed. Formal uncertainty estimation and reporting is included. Results. We test the algorithm on synthetic meteor images and meteors recorded during a recent double-station meteor observing campaign in Greece. In the first case, we find that both the synthetic signal and the a priori time variation of the flux are faithfully reproduced. In the second, the fluxes obtained from the two stations agree to ∼20%.
Dispersively detected Pauli Spin-Blockade in a Silicon Nanowire Field-Effect Transistor
Creators: name: Betz, A. C.
name: Wacquez, R.
name: Vinet, M.
name: Jehl, X.
name: Saraiva, A L.
name: Sanquer, M.
name: Ferguson, A. J.
name: Gonzalez-Zalba, M. F.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We report the dispersive readout of the spin state of a double quantum dot formed at the corner states of a silicon nanowire field-effect transistor. Two face-to-face top-gate electrodes allow us to independently tune the charge occupation of the quantum dot system down to the few-electron limit. We measure the charge stability of the double quantum dot in DC transport as well as dispersively via in-situ gate-based radio frequency reflectometry, where one top-gate electrode is connected to a resonator. The latter removes the need for external charge sensors in quantum computing architectures and provides a compact way to readout the dispersive shift caused by changes in the quantum capacitance during interdot charge transitions. Here, we observe Pauli spin-blockade in the high-frequency response of the circuit at finite magnetic fields between singlet and triplet states. The blockade is lifted at higher magnetic fields when intra-dot triplet states become the ground state configuration. A lineshape analysis of the dispersive phase shift reveals furthermore an intradot valley-orbit splitting $Δ_{vo}$ of 145 $μ$eV. Our results open up the possibility to operate compact CMOS technology as a singlet-triplet qubit and make split-gate silicon nanowire architectures an ideal candidate for the study of spin dynamics.
Amaranthus caudatus Linnaeus 1753
Creators: name: Jarvis, Charlie
Publisher: name: Zenodo
Year: 2007
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Caryophyllales
Amaranthaceae
Amaranthus
Amaranthus caudatus

description: Amaranthus caudatus Linnaeus, Species Plantarum 2: 990. 1753. "Habitat in Peru, Persia, Zeylona." RCN: 7187. Lectotype (Townsend in Nasir & Ali, Fl. W. Pakistan 71: 10. 1974): Herb. Linn. No. 1117.26 (LINN). Generitype of Amaranthus Linnaeus (vide Green, Prop. Brit. Bot.: 188. 1929). Current name:  Amaranthus caudatus L. (Amaranthaceae).
description: Published as part of Jarvis, Charlie, 2007, Chapter 7: Linnaean Plant Names and their Types (part A), pp. 252-342 in Order out of Chaos. Linnaean Plant Types and their Types, London :Linnaean Society of London in association with the Natural History Museum on page 283, DOI: 10.5281/zenodo.291971
Modeling Reionization in a Bursty Universe
Creators: name: Hartley, Blake
name: Ricotti, Massimo
Publisher: name: arXiv
Year: 2016
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present semi-analytic models of the epoch of reionization focusing on the differences between continuous and bursty star formation (SF). Our model utilizes physically motivated analytic fits to 1D radiative transfer simulations of HII regions around dark matter halos in a representative cosmic volume. Constraining our simulations with observed and extrapolated UV luminosity functions of high redshift galaxies, we find that for a fixed halo mass, stellar populations forming in bursty models produce larger HII regions which leave behind long-lived relic HII regions which are able to maintain partial ionization in the intergalactic medium (IGM) in a manner similar to an early X-ray background. The overall effect is a significant increase in the optical depth of the IGM, $τ_e$, and a milder increase of the redshift of reionization. To produce $τ_e =0.066$ observed by Planck and complete reionization by redshift $z_{\rm re}\sim 6$, models with bursty SF require an escape fraction $f_{\rm esc}\sim 2\%-10\%$ that is 2-10 times lower than $f_{\rm esc}\sim 17\%$ found assuming continuous SF and is consistent with upper limits on $f_{\rm esc}$ from observations at $z=0$ and $z\sim 1.3-6$. The ionizing photon budget needed to reproduce the observed $τ_e$ and $z_{\rm re}$ depends on the period and duty cycle of the bursts of SF and the temperature of the neutral IGM. These results suggest that the tension between observed and predicted ionizing photon budget for reionization can be alleviated if reionization is driven by short bursts of SF, perhaps relating to the formation of Population~III stars and compact star clusters such as proto-globular clusters.
description: 17 pages, 11 figures, 1 table. Submitted to MNRAS
Coherent Averaging
Creators: name: Fraïsse, Julien M. E.
name: Braun, Daniel
Publisher: name: arXiv
Year: 2015
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate in detail a recently introduced "coherent averaging scheme" in terms of its usefulness for achieving Heisenberg limited sensitivity in the measurement of different parameters. In the scheme, $N$ quantum probes in a product state interact with a quantum bus. Instead of measuring the probes directly and then averaging as in classical averaging, one measures the quantum bus or the entire system and tries to estimate the parameters from these measurement results. Combining analytical results from perturbation theory and an exactly solvable dephasing model with numerical simulations, we draw a detailed picture of the scaling of the best achievable sensitivity with $N$, the dependence on the initial state, the interaction strength, the part of the system measured, and the parameter under investigation.
title: Aspects of thermal modeling using digital terrain models
title: Assessing indirect radiation, the solar limb darkening effect, and depth profiles: Application to Mercury’s north polar MLA DTM
titleType: Subtitle
Creators: name: Gläser, Philipp
Publisher: name: Technische Universität Berlin
Year: 2022
Subjects: subject: 500 Naturwissenschaften und Mathematik::520 Astronomie::520 Astronomie und zugeordnete Wissenschaften
subject: radiation mechanisms: thermal
subject: methods: numerical
subject: planets and satellites: surfaces

description: Context. Our thermal model is adapted and extended in this study. Specifically the aspect of handling indirect radiation, the solar limb darkening effect, and depth profiles are addressed. Aims. Our goal is to improve the existing thermal model to handle terrain scattering and re-radiation in an adaptive way. In addition, we aim to change previously fixed and manually chosen discretization of the solar limb darkening effect and depth profile to be adaptive and applicable for various planets and purposes. Methods. The temperature was modeled based on digital terrain models (DTMs) using data of the Mercury Laser Altimeter (MLA). New implementations to handle terrain scattering and re-radiation were introduced using level-of-detail techniques. The solar disk was discretized into a variable number of rings and the depth profile was introduced as an exponential function for which the number of nodes and the maximum depth can be chosen. Results. We present results for the ideal window size and degree of level-of-detail for thermal studies of the Hermean north pole. Further we show that the previous discretization of the solar limb darkening effect proved insufficient for Mercury, and we updated the implementation accordingly. Similarly we improved the implementation for the depth profile. For the first time, we derived depth-to-ice, as well as average and maximum temperature maps based on thermal modeling of the complete north polar MLA DTM.