cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Optical testbed for the LISA phasemeter
Creators: name: Schwarze, Thomas S.
name: Fernández Barranco, G.
name: Penkert, D.
name: Gerberding, Oliver
name: Heinzel, Gerhard
name: Danzmann, Karsten
Publisher: name: Bristol : Institute of Physics Publishing
Year: 2016
Subjects: subject: Analog to digital conversion
subject: Data transfer
subject: Geodetic satellites
subject: Gravitational effects
subject: Testbeds
subject: Tracking (position)
subject: Units of measurement
subject: Auxiliary functions
subject: Electronic readout
subject: Gravitational wave detectors
subject: Inter-satellite ranging
subject: Metrology systems
subject: Gravitationswelle
subject: Konferenzschrift
subject: Dewey Decimal Classification::500 | Naturwissenschaften
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: The planned spaceborne gravitational wave detector LISA will allow the detection of gravitational waves at frequencies between 0.1 mHz and 1 Hz. A breadboard model for the metrology system aka the phasemeter was developed in the scope of an ESA technology development project by a collaboration between the Albert Einstein Institute, the Technical University of Denmark and the Danish industry partner Axcon Aps. It in particular provides the electronic readout of the main interferometer phases besides auxiliary functions. These include clock noise transfer, ADC pilot tone correction, inter-satellite ranging and data transfer. Besides in LISA, the phasemeter can also be applied in future satellite geodesy missions. Here we show the planning and advances in the implementation of an optical testbed for the full metrology chain. It is based on an ultra-stable hexagonal optical bench. This bench allows the generation of three unequal heterodyne beatnotes with a zero phase combination, thus providing the possibility to probe the phase readout for non-linearities in an optical three signal test. Additionally, the utilization of three independent phasemeters will allow the testing of the auxiliary functions. Once working, components can individually be replaced with flight-qualified hardware in this setup.
Petrology and Structure of the Crystal Lake Area, Los Angeles County, California
Creators: name: Wells, John Cawse
Publisher: name: California Institute of Technology
Year: 1938
Subjects: subject: Geology
subject: FOS: Earth and related environmental sciences

description: Crystal Lake is located near the head of the north of the San Gabriel River in the San Gabriel Mountains. Igneous and syntectic rocks are the dominant types in this locality. However, remnants and inclusions of the older metamorphic complex of meta-sediments and dike rocks, which is dominant both north and south of the area studied form a large part of the exposures. The complex is intruded by a quartz diorite similar to the Wilson diorite described by Miller several miles to the southwest. The dioritic rook is in turn intruded and replaced by granitic material, the only intrusive evidence of which consists of a network of pegmatite and aplite dikes.  Migmatization is indicated by gradations in structure and composition from the quartz diorite to the granite porphyroblastic development in the intermediate rock, and replacement textures in the granite and intermediate rock.

Two parallel high-angle normal faults with displacements of 200 to 400 feet cross the area in a northeast southwest direction. Associated with the major faults are innumerable minor faults and fractures with displacements from a fraction of an inch to a foot or more in magnitude.

The formation of Pine Flat Basin, the broad valley containing Crystal Lake, has been ascribed to glaciation, but the author believes that structural movements and stream erosion with accompanying landslides were the responsible factors. This explanation accounts for all of the physiographic features of the basin and is more compatible with the geographic location and climatic conditions.
Instantons in six dimensions and twistors
Creators: name: Ivanova, Tatiana A.
name: Lechtenfeld, Olaf
name: Popov, Alexander D.
name: Tormählen, Maike
Publisher: name: Amsterdam : Elsevier
Year: 2014
Subjects: subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: Recently, conformal field theories in six dimensions were discussed from the twistorial point of view. In particular, it was demonstrated that the twistor transform between chiral zero-rest-mass fields and cohomology classes on twistor space can be generalized from four to six dimensions. On the other hand, the possibility of generalizing the correspondence between instanton gauge fields and holomorphic bundles over twistor space is questionable. It was shown by Sämann and Wolf that holomorphic line bundles over the canonical twistor space Tw(X) (defined as a bundle of almost complex structures over the six-dimensional manifold X) correspond to pure-gauge Maxwell potentials, i.e. the twistor transform fails. On the example of X=CP3 we show that there exists a twistor correspondence between Abelian or non-Abelian Yang-Mills instantons on CP3 and holomorphic bundles over complex submanifolds of Tw(CP3), but it is not so efficient as in the four-dimensional case because the twistor transform does not parametrize instantons by unconstrained holomorphic data as it does in four dimensions.
A Catalog of Globular Cluster Systems: What Determines the Size of a Galaxy's Globular Cluster Population?
Creators: name: Harris, William E.
name: Harris, Gretchen L. H.
name: Alessi, Matthew
Publisher: name: arXiv
Year: 2013
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present a catalog of 422 galaxies with published measurements of their globular cluster (GC) populations. Of these, 248 are E galaxies, 93 are S0 galaxies, and 81 are spirals or irregulars. Among various correlations of the total number of GCs with other global galaxy properties, we find that N_GC correlates well though nonlinearly with the dynamical mass of the galaxy bulge M_dyn = 4 σ_e^2 R_e /G, where σ_e is the central velocity dispersion and R_e the effective radius of the galaxy light profile. We also present updated versions of the GC specific frequency S_N and specific mass S_M versus host galaxy luminosity and baryonic mass. These graphs exhibit the previously known U-shape: highest S_N or S_M values occur for either dwarfs or supergiants, but in the midrange of galaxy size (10^9 - 10^10 L_Sun) the GC numbers fall along a well defined baseline value of S_N ~ 1 or S_M ~ 0.1, similar among all galaxy types. Along with other recent discussions, we suggest that this trend may represent the effects of feedback, which systematically inhibited early star formation at either very low or very high galaxy mass, but which had its minimum effect for intermediate masses. Our results strongly reinforce recent proposals that GC formation efficiency appears to be most nearly proportional to the galaxy halo mass M_halo. The mean "absolute" efficiency ratio for GC formation that we derive from the catalog data is M_GCS/M_halo = 6 \times 10^-5. We suggest that the galaxy-to-galaxy scatter around this mean value may arise in part because of differences in the relative timing of GC formation versus field-star formation. Finally, we find that an excellent empirical predictor of total GC population for galaxies of all luminosities is N_GC \sim (R_e σ_e)^1.3$, a result consistent with Fundamental Plane scaling relations.
description: 15 pages, 14 figures; ApJ, in press for July 2013
Auslegung und Vergleich von Adaptern zur direkten Stromeinspeisung für leitungsgebundene Störfestigkeitsprüfungen
Creators: name: Ückerseifer, Jan
name: Schweitzer, Jan-Christian
name: Gronwald, Frank
Publisher: name: Aachen : Apprimus
Year: 2020
Subjects: subject: Störfestigkeit
subject: Luftfahrt
subject: Flugzeug
subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau::621 | Angewandte Physik::621,3 | Elektrotechnik, Elektronik

description: Feldgebundene Störfestigkeitsprüfungen generieren auf der Oberfläche elektrisch leitfähiger Prüflinge Oberflächenströme. Ähnliche Stromverteilungen können alternativ durch direkte Stromeinspeisung über galvanisch an den Prüfling gekoppelte Stromquellen mit geeignetem Rückleiter nachgebildet werden. In der Luftfahrtindustrie wird ein solches Testprozedere unter dem Begriff DCI (engl. direct current injection) geführt. In [4] findet sich ein exemplarischer DCI-Aufbau am Beispiel eines Flugzeugs mit Adaptern zur Stromeinspeisung bzw. –entnahme, wobei der Rückleiter als Massefläche realisiert ist. Andere Prüfaufbauten verwenden stattdessen einen koaxialen Rückleiter, der den Prüfling vollständig umschließt. Eine Übersicht beider Ansätze gibt [9]. Ziel dieses Beitrags ist es, DCI-Adapter zur Stromeinspeisung zu entwerfen und messtechnisch zu untersuchen, inwieweit verschieden dimensionierte Adapter geeignet für eine direkte Stromeinspeisung unterschiedlicher Prüflinge sind. Als Kriterien dienen Grad der Impedanzanpassung an den Prüfling, ihre wirksame Bandbreite sowie Stromtragfähigkeit. Entgegen den in einschlägiger Literatur vornehmlich betrachteten koaxialen Einspeisungen werden zusätzlich nicht-koaxiale Systeme analysiert. Da beiden Varianten meist keine quantitativen Entwurfsvorschriften beiliegen, erfolgen numerisch basierte Dimensionierungsbeispiele. Die langfristige Zielsetzung in der Entwicklung von DCI-Adaptern besteht darin, DCI-Tests aus der Luftfahrt auf die Automobilindustrie zu übertragen.
Comment on "Physical Origin and Generic Control of Magnonic Band Gaps of Dipole-Exchange Spin Waves in Width-Modulated Nanostrip Waveguides" [K.-S. Lee, D.-S. Han, and S.-K. Kim, PRL 102, 127202 (2009), arXiv:0811.0411]
Creators: name: Di, K.
name: Lim, H. S.
name: Zhang, V. L.
name: Kuok, M. H.
name: Ng, S. C.
name: Cottam, M. G.
name: Nguyen, H. T.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: In Ref. [PRL 102, 127202 (2009)] Lee et al. reported the existence of large magnonic bandgaps in one-dimensional width-modulated Permalloy nanostripe waveguides based on OOMMF simulations. However, as the symmetry of the magnetic field pulse they applied to excite the spin waves (SWs) was not general, the entire set of SW branches with A symmetry was omitted from the magnonic band structures (see below). This omission has unfortunately led to misleading conclusions of, for instance, the number, width and position of the bandgaps. We present here the full band structure based on three different theoretical approaches that gave consistent predictions, thus corroborating the methods employed, namely, a microscopic approach, OOMMF simulations, and a method based on the linearized Landau-Lifshitz equation. Further, we provide a physical interpretation using group theory.
description: Comment submitted to PRL. 2 pages and 1 figure
Buschman-Erdelyi transmutations, classification and applications
Creators: name: Sitnik, Sergei M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: 44A15, 33C45

description: This survey paper contains brief historical information, main known facts and original author's results on the theory of transmutations and some applications. Operators of Buschman-Erdelyi type were first studied by E.T.Copson, R.G.Buschman and A.Erdelyi as integral operators. In 1990's the author was first to prove transmutational nature of these operators and published papers with detailed study of their properties. This class include as special cases such famous objects as Sonine-Poisson-Delsarte transmutations and fractional Riemann-Lioville integrals. In this paper Buschman-Erdelyi transmutations are fully classified as operators of the first kind with special case of zero order smoothness operators, second kind and third kind with special case of unitary Sonine-Katrakhov and Poisson-Katrakhov transmutations. We study such properties as transmutational conditions, factorizations, norm estimates, connections with classical integral transforms. Applications are considered to singular partial differential equations, embedding theorems with sharp constants in Kipriyanov spaces, Euler-Poisson-Darboux equation including Copson lemma, generalized translations, Dunkl operators, Radon transform, generalized harmonics theory, Hardy operators, V.V.Katrakhov's results on pseudodifferential operators and problems of new kind for equations with solutions of arbitrary growth at singularity. The Russian original paper version is also included, it is slightly different from english one.
description: This paper is dedicated to Professor Sergei V. Rogosin on the occasion of his 60th birthday. English version - 31 pages, Russian version - 35 pages
Potamogeton panormitanus Bivona
Creators: name: Becherer
Publisher: name: Zenodo
Year: 1956
Subjects: Biodiversity
Taxonomy

description: P.panormitanus Bivona (P. pusillus ssp.panorinitanus G. Fischer) l: Rhonealtwasser bei Dorenaz (Garns). - 2: Branson-Saillon (Garns). - 3: Ausstich beim Bahnhof Charrat-Fully (Garns); Econe bei Riddes (Besse 1893 im Herb. des Chanoines du St-Bernard, sub Zannichellia, Bestimmung 1940 berichtigt von W. Koch). Die Angabe «Oberwallis» (Hegi, Flora, 2. Aufl., Bd. I, S. 199 [1936]) dürfte irrig sein.
description: Published as part of Becherer, 1956, Florae Vallesiacae Supplementum, pp. 1-556 in Denkschriften der Schweizerischen Naturforschenden Gesellschaft 71 on pages 1-556
Laser theory for optomechanics: Limit cycles in the quantum regime
Creators: name: Lörch, Niels
name: Qian, Jiang
name: Clerk, Aashish
name: Marquardt, Florian
name: Hammerer, Klemens
Publisher: name: New York : American Physical Society
Year: 2014
Subjects: subject: Quantum physics
subject: Monte Carlo methods
subject: Quantum electronics
subject: Master equations
subject: Mechanical resonators
subject: Nanophysics
subject: Numerical solution
subject: Opto-mechanical systems
subject: Strong-coupling regime
subject: Wigner functions
subject: Laser theory
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: Optomechanical systems can exhibit self-sustained limit cycles where the quantum state of the mechanical resonator possesses nonclassical characteristics such as a strongly negative Wigner density, as was shown recently in a numerical study by Qian et al. [Phys. Rev. Lett. 109, 253601 (2012)]. Here, we derive a Fokker-Planck equation describing mechanical limit cycles in the quantum regime that correctly reproduces the numerically observed nonclassical features. The derivation starts from the standard optomechanical master equation and is based on techniques borrowed from the laser theory due to Haake and Lewenstein. We compare our analytical model with numerical solutions of the master equation based on Monte Carlo simulations and find very good agreement over a wide and so far unexplored regime of system parameters. As one main conclusion, we predict negative Wigner functions to be observable even for surprisingly classical parameters, i.e., outside the single-photon strong-coupling regime, for strong cavity drive and rather large limit-cycle amplitudes. The approach taken here provides a natural starting point for further studies of quantum effects in optomechanics.
Dissipative preparation of antiferromagnetic order in the Fermi-Hubbard model
Creators: name: Kaczmarczyk, J.
name: Weimer, Hendrik
name: Lemeshko, Mikhail
Publisher: name: Bristol : Institute of Physics Publishing
Year: 2016
Subjects: subject: antiferromagnetic phase
subject: dissipative preparation
subject: Hubbard model
subject: lattice fermion models
subject: ultracold gases
subject: Antiferromagnetism
subject: Condensed matter physics
subject: Crystal lattices
subject: Incoherent scattering
subject: Laser cooling
subject: Machinery
subject: Optical lattices
subject: Optical materials
subject: Quantum chemistry
subject: Antiferromagnetic orderings
subject: Antiferromagnetic phase
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: The Fermi-Hubbard model is one of the key models of condensed matter physics, which holds a potential for explaining the mystery of high-temperature superconductivity. Recent progress in ultracold atoms in optical lattices has paved the way to studying the model's phase diagram using the tools of quantum simulation, which emerged as a promising alternative to the numerical calculations plagued by the infamous sign problem. However, the temperatures achieved using elaborate laser cooling protocols so far have been too high to show the appearance of antiferromagnetic (AF) and superconducting quantum phases directly. In this work, we demonstrate that using the machinery of dissipative quantum state engineering, one can observe the emergence of the AF order in the Fermi-Hubbard model with fermions in optical lattices. The core of the approach is to add incoherent laser scattering in such a way that the AF state emerges as the dark state of the driven-dissipative dynamics. The proposed controlled dissipation channels described in this work are straightforward to add to already existing experimental setups.
Thermodynamic length for far from equilibrium quantum systems
Creators: name: Deffner, Sebastian
name: Lutz, Eric
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We consider a closed quantum system, initially at thermal equilibrium, driven by arbitrary external parameters. We derive a lower bound on the entropy production which we express in terms of the Bures angle between the nonequilibrium and the corresponding equilibrium state of the system. The Bures angle is an angle between mixed quantum states and defines a thermodynamic length valid arbitrarily far from equilibrium. As an illustration, we treat the case of a time-dependent harmonic oscillator for which we obtain analytic expressions for generic driving protocols.
description: 8 pages, 3 figures
EXPONENTIATED ADYA DISTRIBUTION: PROPERTIES AND APPLICATIONS
Creators: name: Ganaie, Rashid A.
name: Aafaq A. Rather
name: D. Vedavathi Saraja
name: Mahfooz Alam
name: Aijaz Ahmad
name: Tali, Arif Muhammad
name: Nisa, Rifat
name: Berihan R. Elemary
Publisher: name: Reliability: Theory & Applications
Year: 2023
Subjects: Exponentiated distribution
Adya distribution
Order statistics
Entropies
Reliability analysis
Maximum likelihood Estimation

description: In this article, “we introduce a new generalization of Adya distribution known as Exponentiated Adya distribution. We have also derived and discussed its different statistical properties. The Exponentiated Adya distribution has two parameters (scale and shape). The different structural properties of the proposed distribution have been obtained. The maximum likelihood estimation technique is also used for estimating the parameters of the proposed distribution. Finally, a real lifetime data set is used for examining the superiority of the proposed distribution.”
Range Calculations for Airplanes With Continuously Controllable Pitch Propellers, and the Effect of Certain Geometric Parameters of the Airplane on Range
Creators: name: Scoles, Albert Buddy
name: Schoech, William Alton
Publisher: name: California Institute of Technology
Year: 1938
Subjects: Aeronautics
Aeronautical Engineering

description: This investigation was undertaken to develop a satisfactorily exact method for the calculation of range of airplane; and with such method, to determine the effect of certain geometrical parameters of the airplane on range, namely, span, aspect ratio, and wing loading.

With satisfactory aerodynamic data from wind tunnel reports, and with satisfactory engine performance data from test stand reports, the method developed permits determination of range, optimum speeds to use, and optimum propeller rpm to use for each speed.  It further permits determination of endurance.

In general, increasing aspect ratio for constant span will increase maximum range if reasonable upper limits are placed on wing loading.  The gain is but slight for aspect ratios in excess of 11.  Similarly, decreasing span for constant aspect ratio will increase maximum range.  Both of these variations results in increased wing loading, which can therefore be considered as the fundamental factor giving the increase.  There will in general be an optimum combination of aspect ratio and span for a given wing loading which will give maximum range.  Satisfactory takeoff and sea-level rate of climb will limit the wing loading; however, for wing loadings in excess of 50, the maximum gain obtainable is of the order of 5%.
Geology of the Fernando Pass Region
Creators: name: Rynearson, Garn Arthur
Publisher: name: California Institute of Technology
Year: 1938
Subjects: subject: Santa Susana Mountains
subject: San Fernando Valley
subject: Placerita Canyon
subject: Santa Clara Valley
subject: San Gabriel Mountains
subject: Geology
subject: FOS: Earth and related environmental sciences

description: Location of area: The Fernando Pass region is located in the low pass between the San Fernando and upper Santa Clara Valleys, and southeast of the town of Newhall. The bounding meridians are Lat. 34° 16' - 34° 22' 45" N. and Long 118° 28’ - 118° 32' W. The area includes about thirty square miles and lies between the western end of the San Gabriel and the eastern end of the Santa Susana Mountains.  It is bounded by Placerita Canyon on the north and the San Fernando Valley on the south. Refer to Fig. 1 for more general location.

Purpose of the work: The work was done in partial fulfillment of the requirements for the degree of Bachelor of Science at the California Institute of Technology. The essential purpose of the work was to gain a more detailed knowledge of the stratigraphic and structural relationships of the rocks in the region.

Field work: The geology was plotted in the field on United States Geological Survey topographic maps. The rock exposures were traced on foot and locations were determined by topographic features and by Brunton Compass shots. Dips and strikes were carefully taken with the Brunton Compass and Clinometer. Four days preliminary work in the fall of 1937 and twenty-one days during the spring of 1938 were required to complete the field studies.
A Preliminary Study of the Problem of Boundary Layer Control
Creators: name: Smith, Apollo Milton Olin
Publisher: name: California Institute of Technology
Year: 1938
Subjects: Aeronautical Engineering
Aeronautics

description: This thesis presents a study of the problem of securing high lifts by means of boundary layer removal, together with first results of tests on the Boundary Layer Model of the Guggenheim Aeronautics Laboratory, California Institute of Technology (hereinafter called GALCIT).  It is divided into two parts:  first, a review and discussion of previous work, and second, presentation and development of methods used for carrying out tests upon the GALCIT model, together with experimental results obtained from the tests upon the model.

Previous researches show that boundary layer removal is indeed successful in securing high lift coefficients.  Study reveals also that results from one experiment may differ greatly from those of another.  Consequently, previous work is of little help in predicting results to be obtained for a design different from the model tested.

Results on the GALCIT model have not been favorable, but it is believed that flow tests have found the difficulty.  Consequently, the experimental work has value only for the light it sheds upon the future course of this research at the Institute.
A Report on the Structure, Stratigraphy and Fossil Content of a Small Portion of the San Gabriel Range
Creators: name: Hayward, Russell Edward
Publisher: name: California Institute of Technology
Year: 1938
Subjects: subject: Geology
subject: FOS: Earth and related environmental sciences

description: The field work was done at a point some twenty miles to the southwest of Pasadena, California, from which city the spot may be reached by driving west on Foothill Boulevard to the town of Sunland, and there turning to the north. The area lies almost directly to the north of Sunland, and extends from slightly to the west of Ebbie Canyon approximately one-half mile to the west, and from the northern edge of the Tujunga Wash somewhat more than one mile to the north, thus forming a rectangle having
north-south and east-west running borders. The total area
is approximately three-fourths of one square mile.

This paper was written to fulfill the requirements
of the California Institute of Technology for the degree of
Bachelor of Science. Since the author is more interested
in Paleontology than in Field Geology, this area was chosen
because of the abundance of fossils in its northern section.
This particular small area was selected because it contains
a representative fossil assemblage, because there would be
ample time remaining after the completion of the field work
properly to prepare and identify the fossils collected, and
because of its accessibility. It has been attempted to
assign a definite age to those beds lying to the north of
the Sunland Fault through a correlation of the fossils of
this region with those of other adjacent areas, especially
of the Santa Monica Mountains.
Glass Transitions and Critical Points in Orientationally Disordered Crystals and Structural Glassformers: "Strong" Liquids are More Interesting Than We Thought
Creators: name: Angell, C. Austen
name: Hemmati, Mahin
Publisher: name: arXiv
Year: 2013
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: When liquids are classified using Tg -scaled Arrhenius plots of relaxation times (or relative rates of entropy increase above Tg) across a "strong-fragile" spectrum of behaviors, the "strong" liquids have always appeared rather uninteresting [1, 2]. Here we use updated plots of the same type for crystal phases of the "rotator" variety [3] to confirm that the same pattern of behavior exists for these simpler (center of mass ordered) systems. However, in this case we can show that the "strong" systems owe their behavior to the existence of lambda-type order-disorder transitions at higher temperatures (directly observable in the cases where observations are not interrupted by prior melting). Furthermore, the same observation can be made for other systems in which the glass transition, at which the ordering is arrested, occurs in the thermodynamic ground state of the system. This prompts an enquiry into the behavior of strong liquids at high temperatures. Using the case of silica itself, we again find strong evidence from extended ion dynamics simulations, for a lambda transition at high temperatures, but only if pressure is adjusted to a critical value. In this case the lambda point is identifiable as a liquid-liquid critical point of the type suggested for supercooled water. We recognize the possibility of exploring, a postiori, the consequences of rapid cooling of laboratory liquid SiO2 from >5000K and multi-GPa pressures, using the phenomenology of damage-induced plasmas in optical fibers. The ramifications of these considerations will be explored to establish a "big picture"2 of the relation of thermodynamic transitions to supercooled liquid phenomenology [4, 5].
Declutter and resample: Towards parameter free denoising
Creators: name: Buchet, Mickaël
name: Dey, Tamal K.
name: Wang, Jiayuan
name: Wang, Yusu
Publisher: name: Journal of Computational Geometry
Year: 2018

description: In many data analysis applications the following scenario is commonplace: we are given a point set that is supposed to sample a hidden ground truth $K$ in a metric space, but it got corrupted with noise so that some of the data points lie far away from $K$ creating outliers also termed as ambient noise. One of the main goals of denoising algorithms is to eliminate such noise so that the curated data lie within a bounded Hausdorff distance of $K$. Popular denoising approaches such as deconvolution and thresholding often require the user to set several parameters and/or to choose an appropriate noise model while guaranteeing only asymptotic convergence. Our goal is to lighten this burden as much as possible while ensuring theoretical guarantees in all cases. Specifically, first, we propose a simple denoising algorithm that requires only a single parameter but provides a theoretical guarantee on the quality of the output on general input points. We argue that this single parameter cannot be avoided. We next present a simple algorithm that avoids even this parameter by paying for it with a slight strengthening of the sampling condition on the input points which is not unrealistic. We also provide some preliminary empirical evidence that our algorithms are effective in practice.
description: Journal of Computational Geometry, Vol. 9 No. 2 (2018): Special Issue of Selected Papers from SoCG 2017
A Short Investigation of the North Central Portion of the Lang Quadrangle, California
Creators: name: Allen, Richard Harvey
Publisher: name: California Institute of Technology
Year: 1938
Subjects: subject: Geology
subject: FOS: Earth and related environmental sciences

description: This paper consists of a study of the Escondido and Mint Canyon formations and their structural relationships in the Lang Quadrangle, California. The Escondido formation was found to be approximately 4,500 feet thick and folded into a large pitching syncline with a small anticline in the center. This large syncline, which is in fault contact with the basement, is further modified by a series 4 major strike-slip faults in which the east side has moved northwards. The structure of the Mint Canyon formation is that of a syncline of depositional origin lying in depositional contact on the Escondido and the basement. The Mint Canyon is also modified by one of the major strike-slip faults.

The age determinations are not satisfactory where the Escondido and the basement are concerned. The basement is believed to be pre-Cretaceous; the Escondido is placed between the Eocene and the Upper Middle Miocene and is suspected to be Middle Miocene in age. The Mint Canyon formation is thought to be Upper-Middle Miocene and Lower Upper Miocene.
GENERALIZATION OF LENGTH BIASED WEIGHTED GENERALIZED UNIFORM DISTRIBUTION AND ITS APPLICATIONS
Creators: name: Jismi Mathew
Publisher: name: Reliability: Theory & Applications
Year: 2023
Subjects: Entropy
Length biased weighted generalized uniform distribution
Maximum likelihood method
Order statistics
Quantiles
Stress strength analysis

description: In this article, a generalization of length biased weighted generalized uniform distribution called Marshall Olkin length biased weighted generalized uniform distribution is introduced and studied. Some of the statistical properties of the new distribution such as hazard rate function, compounding, quantile function, moments, Renyi and Shannon entropies are discussed. The maximum likelihood estimation of the model parameters is done and a simulation study is conducted for confirming the validity of the estimates and also introduced a minification process with respect to the model and explored its sample path behaviour for different combinations of parameters. Further, the stress strength analysis is carried out and the estimate of the reliability is obtained based on a simulation study.
Metal-organic framework based mixed matrix membranes: a solution for highly efficient CO2 capture?
Creators: name: Seoane, Beatriz
name: Coronas, Joaquin
name: Gascon, Ignacio
name: Etxeberria Benavides, Miren
name: Karvan, Oguz
name: Caro, Jürgen
name: Kapteijn, Freek
name: Gascon, Jorge
Publisher: name: Cambridge : Royal Society of Chemistry
Year: 2015
Subjects: subject: hollow-fiber membranes
subject: hansen solubility parameters
subject: gas separation performance
subject: carbon-dioxide capture
subject: zeolitic imidazolate frameworks
subject: nano-composite membranes
subject: igcc power-plants
subject: of-the-art
subject: nanocomposite membranes
subject: hydrogen separation
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: The field of metal–organic framework based mixed matrix membranes (M4s) is critically reviewed, with special emphasis on their application in CO2 capture during energy generation. After introducing the most relevant parameters affecting membrane performance, we define targets in terms of selectivity and productivity based on existing literature on process design for pre- and post-combustion CO2 capture. Subsequently, the state of the art in M4s is reviewed against these targets. Because final application of these membranes will only be possible if thin separation layers can be produced, the latest advances in the manufacture of M4 hollow fibers are discussed. Finally, the recent efforts in understanding the separation performance of these complex composite materials and future research directions are outlined.
Simulation der gestrahlten Emission einer Gigabit Ethernet Übertragungsstrecke in einem an CISPR25 angelehnten Setup
Creators: name: Haschberger, Thomas
name: Hippeli, Johannes
Publisher: name: Aachen : Apprimus
Year: 2020
Subjects: subject: Kfz
subject: Ethernet
subject: Emission
subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau::621 | Angewandte Physik::621,3 | Elektrotechnik, Elektronik

description: In aktuellen Fahrzeugentwicklungen spielen bildgebende Systeme wie sie für das autonome Fahren und Fahrerassistenzsysteme benötigt werden und in das Fahrzeug eingebundene Unterhaltungselektronik eine große Rolle. Um die anfallenden Datenmengen der verschiedenen Systemkomponenten zu übertragen, setzten viele Hersteller auf die Kommunikation mittels Gigabit Ethernet. Aufgrund der hohen Übertragungsgeschwindigkeiten und der vielen verbauten Medienkonverter im Fahrzeug, ergeben sich hohe Anforderungen an das Bordnetz und damit verbunden an die EMV1. Um den EMV Anforderungen an die Elektronik und Übertragungsstrecken gerecht zu werden, wurde ein Simulationssetup gesucht, mit dem es möglich ist verschiedene Treiber, Filterbeschaltungen, Kabelvarianten und Schirmauflagen, sowie Versorgungskonzepte der beteiligen Kommunikationspartner miteinander zu vergleichen. Hierzu wurde ein an CISPR25 angelehntes Setup erstellt, mit dem die Auswirkungen der aufgezählten Parameter auf die gestrahlte Störaussendung analysiert werden kann.
HYBRID AND BLIND WATERMARKING FRAMEWORK FOR PRIVACY PROTECTION AND CONTENT AUTHENTICATION OF DIGITAL MULTIMEDIA
Creators: name: Patel, Swati J.
name: Mehul C. Parikh
Publisher: name: Reliability: Theory & Applications
Year: 2023
Subjects: Digital Video Watermarking
Robustness
Imperceptible
Authentication
Copyright Protection
Discrete Wavelet Transform
Discrete Cosine Transform
Singular Value Decomposition

description: Nowadays, due to inexpensive and conveniently available internet access at the fingertip, the illegitimate sharing of digital multimedia i.e. image, audio, and video is becoming a universal and significant threat. Illegal transmission of digital multimedia through the internet creates an issue of authentication and copyright protection; hence, piracy protection is a vital need for protecting digital media. Digital watermarking is a method of preventing digital theft in which additional information, known as a watermark, is inserted into digital multimedia. This technology was originally designed for still photos, but it has subsequently been expanded to include additional multimedia artifacts such as audio and video, due to its countless use in today's era. Digital watermarking is an effective method of limiting piracy and providing authenticity and copyright ownership to digital content. Watermarking can be performed either in the spatial or in the transform domain. In this paper, a hybrid digital video watermarking technique for copyright protection, data security, and content authentication of multimedia, based on Discrete Wavelet Transform, Discrete Cosine Transform, and Singular Value Decomposition is presented. The authenticity of the content has been ensured by embedding a watermark in the transform domain, while copyright protection has been provided by a strong watermark. The experimental results show that the proposed schemes achieve a PSNR greater than 51 dB on average, which illustrates that the proposed method gives excellent performance for robustness, authentication, and security. A comparison of the proposed framework to various cutting-edge techniques illustrates its effectiveness and superiority.
Negativity and steering: a stronger Peres conjecture
Creators: name: Pusey, Matthew F.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The violation of a Bell inequality certifies the presence of entanglement even if neither party trusts their measurement devices. Recently Moroder et. al. showed how to make this statement quantitative, using semidefinite programming to calculate how much entanglement is certified by a given violation. Here I adapt their techniques to the case where Bob's measurement devices are in fact trusted, the setting for "EPR-steering" inequalities. Interestingly, all of the steering inequalities studied turn out to require negativity for their violation. This supports a significant strengthening of Peres' conjecture that negativity is required to violate a bipartite Bell inequality.
description: 5 pages, 3 tables, 2 figures, code at http://www.mattpusey.co.uk/steer
INTERVAL PATTERN RECOGNITION IN RELATION TO INFORMATION ABOUT THE TREATMENT OF COVID 19 IN PATIENTS WITH BLOOD DISEASES
Creators: name: G. Tsitsiashvili
name: V. Nevzorova
name: A. Talko
name: M. Osipova
Publisher: name: Reliability: Theory & Applications
Year: 2023
Subjects: interval pattern recognition
big data
informative signs
technical gerontology
coronavirus infection
hemoblastosis
tumor

description: Since the problem of coronavirus infection, especially in vulnerable groups, remains relevant in the healthcare system, it is necessary to recognize the risk of fatal events during the treatment of patients from COVID-19. Patients with hemoblastosis are exposed to a more severe course of coronavirus infection than the general population, as well as an increased risk of fatal events. The aim of our study was to determine the effect of signs on the risk outcomes of fatal events among patients with diseases of the blood system, both of a tumor and non-tumor nature. According to the values of the signs, it was necessary to recognize survivors and those who died during treatment from COVID-19. The method of interval pattern recognition was chosen due to the presence of big data, it is described in detail in the article. The patients were broken down by gender and age. The signs that significantly affect the forecast according to the developed algorithm were identified. This is especially evident in groups of men and women with malignant diseases of the blood system over the age of 60 years. In these groups, a positive outcome of treatment is detected due to the presence of a large set of uninformative signs. This phenomenon is closely related to the tasks of technical gerontology.
Radiation pressure excitation of test mass ultrasonic modes via three mode opto-acoustic interactions in a suspended Fabry-Perot cavity
Creators: name: Blair, Carl
name: Susmithian, Sunil
name: Zhao, Chunnong
name: Qi, Fang
name: Ju, Li
name: Blair, David
Publisher: name: arXiv
Year: 2013
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Three-mode parametric-instabilities risk stable operation of gravitational-wave detectors. Instabilities occur through time varying radiation-pressure distributions, derived from beating between two optical modes, exciting mirror acoustic modes in Fabry-Perot cavities. Here we report the first demonstration of radiation-pressure driving of ultrasonic-acoustic modes via pairs of optical modes in gravitational-wave type optical cavities. In this experiment ~0.4W of TEM01 mode and ~1kW of TEM00 mode circulated inside the cavity, an ~181.6kHz excitation was observed with amplitude ~5E-13m. The results verify the driving force term in Braginsky's parametric instability feedback model. The interaction parametric gain was (3.8+/-0.5)E-3 and mass-ratio scaled opto-acoustic overlap 2.7+/-0.4.
description: 8 pages, 4 figures
Time-reversal-symmetry-breaking chiral spin liquids: a projective symmetry group approach of bosonic mean-field theories
Creators: name: Messio, Laura
name: Lhuillier, Claire
name: Misguich, Grégoire
Publisher: name: arXiv
Year: 2013
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Projective symmetry groups (PSG) are the mathematical tools which allow to list and classify mean-field spin liquids (SL) based on a parton construction. The seminal work of Wen and its subsequent extension to bosons by Wang and Vishwanath concerned the so-called symmetric SL: i.e. states that break neither lattice symmetries nor time reversal invariance. Here we generalize this approach to chiral (time reversal symmetry breaking) SL described in a Schwinger boson mean-field approach. A special emphasis is put on frustrated lattices (triangular and kagome lattices), where the possibility of a chiral SL ground state has recently been discussed. The PSG approach is detailed for the triangular lattice case. Results for other lattices are given in the appendices. The physical significance of gauge invariant quantities called fluxes is discussed both in the classical limit and in the quantum SL and their expressions in terms of spin observables are given.
description: 20 pages, 6 figures, 4 tables
Analytical description of high-aperture STED resolution with 0-2$π$ vortex phase modulation
Creators: name: Xie, Hao
name: Liu, Yujia
name: Jin, Dayong
name: Xi, Peng
Publisher: name: arXiv
Year: 2013
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Stimulated emission depletion (STED) can achieve optical super-resolution, with the optical diffraction limit broken by the suppression on the periphery of the fluorescent focal spot. Previously, it is generally experimentally accepted that there exists an inverse square root relationship with the STED power and the resolution, yet without strict analytical description. In this paper, we have analytically verified the relationship between the STED power and the achievable resolution from vector optical theory for the widely used 0-2$π$ vortex phase modulation. Electromagnetic fields of the focal region of a high numerical aperture objective are calculated and approximated into polynomials, and analytical expression of resolution as a function of the STED intensity has been derived. As a result, the resolution can be estimated directly from the measurement of the saturation power of the dye and the STED power applied.
description: (19 pages)
Picosecond laser filamentation in air
Creators: name: Schmitt-Sody, Andreas
name: Kurz, Heiko G.
name: Bergé, Luc
name: Skupin, Stefan
name: Polynkin, Pavel
Publisher: name: Bristol : Institute of Physics Publishing
Year: 2016
Subjects: subject: laser filamentation
subject: nonlinear propagation
subject: optical ionization
subject: picosecond laser pulses
subject: Ionization
subject: Laser beams
subject: Laser pulses
subject: Nonlinear equations
subject: Nonlinear optics
subject: Ultrafast lasers
subject: Electrical breakdown
subject: Femtosecond laser filamentation
subject: Laser filamentation
subject: Nonlinear propagation
subject: Pico-second pulse
subject: Picosecond laser pulse
subject: Plasma temperature
subject: Self-action effects
subject: Ultrashort pulses
subject: Dewey Decimal Classification::500 | Naturwissenschaften
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: The propagation of intense picosecond laser pulses in air in the presence of strong nonlinear self-action effects and air ionization is investigated experimentally and numerically. The model used for numerical analysis is based on the nonlinear propagator for the optical field coupled to the rate equations for the production of various ionic species and plasma temperature. Our results show that the phenomenon of plasma-driven intensity clamping, which has been paramount in femtosecond laser filamentation, holds for picosecond pulses. Furthermore, the temporal pulse distortions in the picosecond regime are limited and the pulse fluence is also clamped. In focused propagation geometry, a unique feature of picosecond filamentation is the production of a broad, fully ionized air channel, continuous both longitudinally and transversely, which may be instrumental for many applications including laser-guided electrical breakdown of air, channeling microwave beams and air lasing.
Geology of the NE 1/4 of the Humphreys Quadrangle, Los Angeles County, California
Creators: name: Watson, Samuel Eugene
Publisher: name: California Institute of Technology
Year: 1938
Subjects: subject: Santa Clara River
subject: Bouquet Canyon
subject: Vasquez Canyon
subject: Texas Canyon
subject: San Andreas Fault
subject: Humphreys Quadrangle
subject: Mint Canyon
subject: Geology
subject: FOS: Earth and related environmental sciences

description: The area discussed in this report lies in the southernmost part of the California Coast Ranges, directly northeast of the San Gabriel Mountains and north of the Santa Monica Mountains. The area mapped is the NE 1/4 of the Humphreys Quadrangle.

The Humphreys Quadrangle, named after the station of Humphreys on the Southern Pacific Railroad in it's southern part, is located about 40 miles northwest of Los Angeles. It is in latitude 34°30' N and longitude 118°24' W. In the northern section is the southern part of the Sierra Pelona hills, rising to a height of a little over 2700 feet in the Angeles National Forest. The southern section contains the narrow flat valley of the Santa Clara River. The San Andreas fault runs along the south side of Hughes Lake, which is about 15 miles due north. A branch of the San Andreas ends close to the eastern boundary of this area.

In the Humphreys Quadrangle, the area studied lies between Bouquet and Mint Canyons, including a portion of Mint Canyon, and also Vasquez and Texas Canyons. By way of Bouquet Canyon, it is approximately 8 miles from the town of Saugus. From Pasadena it may be reached by taking Foothill Blvd. through the San Fernando Valley to Newhall, and then to Saugus. The road to Mojave is taken from Saugus, and either the Mint Canyon or Bouquet Canyon roads lead directly into the area.
Entanglement as an indicator of a geometrical crossover in a two-electron quantum dot in a magnetic field
Creators: name: Nazmitdinov, R. G.
name: Simonovic, N. S.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We found that a downwardly concave entanglement evolution of the ground state of a two-electron axially symmetric quantum dot testifies that a shape transition from a lateral to a vertical localization of two electrons under a perpendicular magnetic field takes place. Although affected, the two-electron probability density does not exhibit any prominent change.
description: 4 pages, 2 figures. arXiv admin note: substantial text overlap with arXiv:1112.3473
Potamogeton pectinatus L.
Creators: name: Becherer
Publisher: name: Zenodo
Year: 1956
Subjects: Biodiversity
Taxonomy

description: P. pectinatus L. Cat. 332. 3: IVtartigny-Charrat (P. Hangartner). Var. vulgaris Cham. et Schlecht. - 2: Unter Branson;Mazembroz;Saillon (alles: Garns). Var. scoparius Wallr. - 2: Sarvaz bei Saillon (Garns).
description: Published as part of Becherer, 1956, Florae Vallesiacae Supplementum, pp. 1-556 in Denkschriften der Schweizerischen Naturforschenden Gesellschaft 71 on pages 1-556