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the study of the longitudinal polarization of lambda and lambda - bar hyperons produced in polarized deep inelastic scattering, neutrino scattering, and in z0 decays allows to access the spin dynamics of the quark fragmentation process. different phenomenological spin transfer mechanisms are considered and predictions ... | arxiv:hep-ph/9701384 |
this work presents a conceptual synthesis of causal discovery and inference frameworks, with a focus on how foundational assumptions - - causal sufficiency, causal faithfulness, and the causal markov condition - - are formalized and operationalized across methodological traditions. through structured tables and compara... | arxiv:2504.11035 |
it is known that a minimal teaching set of any threshold function on the twodimensional rectangular grid consists of 3 or 4 points. we derive exact formulae for the numbers of functions corresponding to these values and further refine them in the case of a minimal teaching set of size 3. we also prove that the average ... | arxiv:1307.1058 |
computational acceleration of performance - metric - based materials discovery via high - throughput screening and machine learning methods is becoming widespread. nevertheless, development and optimization of the opto - electronic properties that depend on dilute concentrations of point defects in new materials have n... | arxiv:1906.02776 |
a boolean function $ f : \ { 0, 1 \ } ^ n \ rightarrow \ { 0, 1 \ } $ is called a dictator if it depends on exactly one variable i. e $ f ( x _ 1, x _ 2, \ ldots, x _ n ) = x _ i $ for some $ i \ in [ n ] $. in this work, we study a $ k $ - query dictatorship test. dictatorship tests are central in proving many hardnes... | arxiv:1702.04748 |
we offer a unified approach to several phenomena related to the electromagnetic vacuum of a complex medium made of point electric dipoles. to this aim, we apply the linear response theory to the computation of the polarization field propagator and study the spectrum of vacuum fluctuations. the physical distinction amon... | arxiv:1002.4024 |
recent advancements in machine learning have fueled research on multimodal tasks, such as for instance text - to - video and text - to - audio retrieval. these tasks require models to understand the semantic content of video and audio data, including objects, and characters. the models also need to learn spatial arrang... | arxiv:2409.00851 |
recently it has been proposed that the physical spectrum of a vector - like gauge field theory may exhibit an enhanced global symmetry near a chiral / conformal phase transition. the new symmetry is related to the possibility, supported by various investigations, that a parity - doubled spectrum develops as the number ... | arxiv:hep-ph/0001303 |
tools of quantum information theory offer a new perspective to characterize phases and phase transitions in interacting many - body quantum systems. the hubbard model is the archetypal model of such systems and can explain rich phenomena of quantum matter with minimal assumptions. recent measurements of entanglement - ... | arxiv:2007.00562 |
density inhomogeneities are ubiquitous in space and astrophysical plasmas, in particular at contact boundaries between different media. they often correspond to regions that exhibits strong dynamics on a wide range of spatial and temporal scales. indeed, density inhomogeneities are a source of free energy that can driv... | arxiv:2104.05011 |
few - shot image classification ( fsic ), which requires a model to recognize new categories via learning from few images of these categories, has attracted lots of attention. recently, meta - learning based methods have been shown as a promising direction for fsic. commonly, they train a meta - learner ( meta - learni... | arxiv:2007.08129 |
by distributing the training process, local approximation reduces the cost of the standard gaussian process. an ensemble technique combines local predictions from gaussian experts trained on different partitions of the data. ensemble methods aggregate models ' predictions by assuming a perfect diversity of local predic... | arxiv:2211.09940 |
we present here amusing \ textrm { + + } ; the largest compilation of nearby galaxies observed with the muse integral field spectrograph so far. this collection consists of 635 galaxies from different muse projects covering the redshift interval $ 0. 0002 < z < 0. 1 $. the sample and its main properties are characteriz... | arxiv:2002.09328 |
wiesner ' s unforgeable quantum money scheme is widely celebrated as the first quantum information application. based on the no - cloning property of quantum mechanics, this scheme allows for the creation of credit cards used in authenticated transactions offering security guarantees impossible to achieve by classical ... | arxiv:1705.01428 |
the exchange charge density operators that correspond to the fermi - invariant decomposition of quark - quark interactions have been constructed. their effect on the electromagnetic charge radii of the nucleons, in combination with that of the relativistic corrections to the single - quark operator, has been studied wi... | arxiv:hep-ph/9711252 |
to understand changes in physical systems and facilitate decisions, explaining how model predictions are made is crucial. we use model - based interpretability, where models of physical systems are constructed by composing basic constructs that explain locally how energy is exchanged and transformed. we use the port ha... | arxiv:2003.10025 |
in constant - roll inflation, the scalar field that drives the accelerated expansion of the universe is rolling down its potential at a constant rate. within this framework, we highlight the relations between the hubble slow - roll parameters and the potential ones, studying in detail the case of a single - field colem... | arxiv:1711.09861 |
starting from the $ 0 ^ { + + } $ glueball mass and wave function computed from lattice qcd, we compute the local potential between two constituent gluons. since the properties of constituent gluons are still a matter of research, we allow for them to be either massless, or massive with a mass around 0. 7 gev. both pic... | arxiv:hep-ph/0611216 |
we get a new inequality on the hodge number $ h ^ { 1, 1 } ( s ) $ of fibred algebraic complex surfaces $ s $, which is a generalization of an inequality of beauville. our inequality implies the arakelov type inequalities due to arakelov, faltings, viehweg and zuo, respectively. | arxiv:1303.2749 |
we consider c2 hamiltonian functions on compact 4 - dimensional symplectic manifolds to study elliptic dynamics of the hamiltonian flow, namely the so - called newhouse dichotomy. we show that for any open set u intersecting a far from anosov regular energy surface, there is a nearby hamiltonian having an elliptic clos... | arxiv:0801.3072 |
we develop a new structure of the green ' s function of a second - order elliptic operator in divergence form in a 2d bounded domain. based on this structure and the theory of rearrangement of functions, we construct concentrated traveling - rotating helical vortex patches to 3d incompressible euler equations in an inf... | arxiv:2209.12237 |
we derive the interaction of fermions with a dynamical space - time based on the postulate that the description of physics should be independent of the reference frame, which means to require the form - invariance of the fermion action under diffeomorphisms. the derivation is worked out in the hamiltonian formalism as ... | arxiv:2101.04467 |
deep distance metric learning ( ddml ), which is proposed to learn image similarity metrics in an end - to - end manner based on the convolution neural network, has achieved encouraging results in many computer vision tasks. $ l2 $ - normalization in the embedding space has been used to improve the performance of sever... | arxiv:1802.09662 |
recent experimental measurements, without any theoretical guidance, showed that isotropic polarization response can be achieved by increasing the number of qd layers in a qd stack. here we analyse the polarization response of multi - layer quantum dot stacks containing up to nine quantum dot layers by linearly polarize... | arxiv:1106.0517 |
we study inelastic ( dynamical ) impurity scattering effects in two - band superconductors with the same ( $ s _ { + + } $ wave ) or different ( $ s _ \ pm $ wave ) sign order parameters. we focus on the enhancement of the superconducting transition temperature $ t _ { \ rm c } $ by magnetic interband scattering with t... | arxiv:1007.1313 |
many quantum algorithms demand a large number of repetitions to obtain reliable statistical results. thus, at each repetition it is necessary to reset the qubits efficiently and precisely in the shortest possible time, so that quantum computers actually have advantages over classical ones. in this work, we perform a de... | arxiv:2304.00684 |
superqubits provide a supersymmetric generalisation of the conventional qubit in quantum information theory. after a review of their current status, we address the problem of generating entangled states. we introduce the global unitary supergroup $ \ text { uosp } ( ( 3 ^ n + 1 ) / 2 | ( 3 ^ n - 1 ) / 2 ) $ for an $ n ... | arxiv:1411.7311 |
we study $ k $ - star decompositions, that is, partitions of the edge set into disjoint stars with $ k $ edges, in the uniformly random $ d $ - regular graph model $ \ mathcal { g } _ { n, d } $. using the small subgraph conditioning method, we prove an existence result for such decompositions for all $ d, k $ such tha... | arxiv:2308.16037 |
one of the principal results obtained by the egret experiment aboard the compton gamma - ray observatory ( cgro ) was the detection of several gamma - ray bursts ( grbs ) above 100 mev. the broad - band spectra obtained for these bursts gave no indication of any high energy spectral attenuation that might preclude dete... | arxiv:astro-ph/9911061 |
a mathematical model, suitable for smartphone implementation, is presented to simulate the performance of a rainwater harvesting system equipped with a covered storage tank. this model serves to determine the optimal tank size and develop strategies to mitigate drought conditions. | arxiv:2404.13080 |
the inclusive photoproduction of two heavy quarks, separated by a large rapidity interval, is proposed as a new channel for the manifestation of the balitsky - fadin - kuraev - lipatov ( bfkl ) dynamics. the extension to the hadroproduction case is also discussed. | arxiv:1906.05940 |
just fourteen years ago the solar system represented the only known planetary system in the galaxy, and conceptions of planet formation were shaped by this sample of one. since then, 320 planets have been discovered orbiting 276 individual stars. this large and growing ensemble of exoplanets has informed theories of pl... | arxiv:0903.3059 |
morphisms between ( formal ) contexts are certain pairs of maps, one between objects and one between attributes of the contexts in question. we study several classes of such morphisms and the connections between them. among other things, we show that the category clc of complete lattices with complete homomorphisms is ... | arxiv:1407.0512 |
automatic feature learning algorithms are at the forefront of modern day machine learning research. we present a novel algorithm, supervised q - walk, which applies q - learning to generate random walks on graphs such that the walks prove to be useful for learning node features suitable for tackling with the node class... | arxiv:1710.00978 |
we study a multi - armed bandit problem in a dynamic environment where arm rewards evolve in a correlated fashion according to a markov chain. different than much of the work on related problems, in our formulation a learning algorithm does not have access to either a priori information or observations of the state of ... | arxiv:1803.04008 |
the purpose of this paper is to study the generalized fong - - vasicek two - factor interest rate model with stochastic volatility. in this model the dispersion of the stochastic short rate ( square of volatility ) is assumed to be stochastic as well and it follows a non - negative process with volatility proportional ... | arxiv:0811.0473 |
the gravitational - wave signal gw150914 was first identified on sept 14 2015 by searches for short - duration gravitational - wave transients. these searches identify time - correlated transients in multiple detectors with minimal assumptions aboutthe signal morphology, allowing them to be sensitive to gravitational w... | arxiv:1602.03843 |
by the tang dynasty study of mathematics was fairly standard in the great schools. the ten computational canons was a collection of ten chinese mathematical works, compiled by early tang dynasty mathematician li chunfeng ( 李 風 602 – 670 ), as the official mathematical texts for imperial examinations in mathematics. the... | https://en.wikipedia.org/wiki/Chinese_mathematics |
slac energy doubler ( sled ) type radio - frequency pulse compressors are widely used in large - scale particle accelerators for converting long - duration moderate - power input pulse into short - duration high - power output pulse. the phase shift keying ( psk ) is one of the key components in sled pulse compression ... | arxiv:1504.01449 |
uncertainty quantification is a critical aspect of machine learning models, providing important insights into the reliability of predictions and aiding the decision - making process in real - world applications. this paper proposes a novel way to use variance - based measures to quantify uncertainty on the basis of sec... | arxiv:2401.00276 |
in hyperbolic dynamics, a well - known result is that every hyperbolic attracting set, have a finite pseudo - orbit tracing property ( fpotp ). it ' s natural to wonder if this result is maintained in the sectional - hyperbolic dynamics ; komuro in [ lorenz attractors do not have the pseudo - orbit tracing property ], ... | arxiv:2006.14369 |
the production of the standard model ( sm ) higgs boson ( h ) in association with a jet is compared with that of the lightest scalar higgs boson ( h ^ 0 ) and the pseudoscalar higgs boson ( a ^ 0 ) of the minimal supersymmetric model ( mssm ) at both the cern large hadron collider ( lhc ) and the fermilab tevatron. we ... | arxiv:hep-ph/0311199 |
we present detailed analytical calculations for an 1d ising ring of arbitrary number of spin - 1 / 2 particles, in order to reveal entanglement properties of the stationary states. we show that the ground state and specific eigenstates of the ising hamiltonian posses remarkable entanglement properties that can reveal n... | arxiv:quant-ph/0312154 |
we compute nuclear force in a holographic model of qcd on the basis of a d4 - d8 brane configuration in type iia string theory. repulsive core of nucleons is quite important in nuclear physics, but its origin has not been well - understood in strongly - coupled qcd. we find that string theory via gauge / string duality... | arxiv:0901.4449 |
we demonstrate that in a recently proposed unified leptoquark model based on the gauge group $ su ( 4 ) _ c \ times su ( 2 ) _ l \ times u ( 1 ) _ r $ significant deviations from the standard model values of $ r _ k $ and $ r _ { k ^ * } $ can be accommodated without any need of extra heavy fermions. low energy data, i... | arxiv:1812.07592 |
a mathematical method for constructing fractal curves and surfaces, termed the $ p \ lambda n $ fractal decomposition, is presented. it allows any function to be split into a finite set of fractal discontinuous functions whose sum is equal everywhere to the original function. thus, the method is specially suited for co... | arxiv:1505.02547 |
we study generic einstein - maxwell - kalb - ramond - dilaton actions, and derive conditions under which they give rise to static, spherically symmetric black hole solutions. we obtain new asymptotically flat and non - flat black hole solutions which are in general electrically and magnetically charged. they have posit... | arxiv:hep-th/0508150 |
in this paper, we introduce quantile coherency to measure general dependence structures emerging in the joint distribution in the frequency domain and argue that this type of dependence is natural for economic time series but remains invisible when only the traditional analysis is employed. we define estimators which c... | arxiv:1510.06946 |
modifications to improve its reliability and safety. following the collapse of the soviet union, the russian federation and united states initiated the shuttle - mir program. the first russian cosmonaut flew on the sts - 60 mission in 1994 and the discovery rendezvoused, but did not dock with, the russian mir in the st... | https://en.wikipedia.org/wiki/NASA |
high - resolution infrared spectroscopy in the 2. 3 - 4. 6 micron region is reported for the peculiar a supergiant, single - lined spectroscopic binary hr 4049. lines from the co fundamental and first overtone, oh fundamental, and several h2o vibration - rotation transitions have been observed in the near - infrared sp... | arxiv:0704.1237 |
in this work, we develop a fast hierarchical solver for solving large, sparse least squares problems. we build upon the algorithm, spaqr ( sparsified qr ), that was developed by the authors to solve large sparse linear systems. our algorithm is built on top of a nested dissection based multifrontal qr approach. we use ... | arxiv:2102.09878 |
in mathematics, an element ( or member ) of a set is any one of the distinct objects that belong to that set. for example, given a set called a containing the first four positive integers ( a = { 1, 2, 3, 4 } { \ displaystyle a = \ { 1, 2, 3, 4 \ } } ), one could say that " 3 is an element of a ", expressed notationall... | https://en.wikipedia.org/wiki/Element_(mathematics) |
using mesoscopic numerical simulations and analytical theory we investigate the coarsening of the solvent structure around a colloidal particle emerging after a temperature quench of the colloid surface. qualitative differences in the coarsening mechanisms are found, depending on the composition of the binary liquid mi... | arxiv:1712.08063 |
performing light scattering experiments we show that introducing short - ranged attraction to a colloidal suspension of nearly hard spheres by addition of free polymer produces new glass transition phenomena. we observe a dramatic acceleration of the density fluctuations amounting to the melting of a colloidal glass. i... | arxiv:cond-mat/0203513 |
measuring instruments are vital for obtaining accurate data in various fields, including scientific research, engineering, and manufacturing. however, data acquisition can be challenging, particularly when direct cable connections are not feasible or difficult to establish. in this paper, we propose a novel method for ... | arxiv:2302.07091 |
several experiments have been performed to investigate the mechanical vibrations associated with trachea and larynx when italian vowels are emitted. the mechanical measurements have been made by using two laser doppler vibrometers ( based on the well - known not - invasive optical measurement technique ) coupled with t... | arxiv:1311.5544 |
in this work, we experimentally demonstrate two - state fluctuations in a metal - insulator - semiconductor ( mis ) device formed out of a metallic atomic force microscopy tip, vacuum gap, and multilayer mose $ _ 2 $ sample. we show that noise in this device is intrinsically bias - dependent due to the bias - dependent... | arxiv:2109.15275 |
we study the connection between lagrangian and hamiltonian descriptions of closed / open dynamics, for a collection of particles with quadratic interaction ( closed system ) and a sub - collection of particles with linear damping ( open system ). we consider both continuous and discrete versions of mechanics. we define... | arxiv:1809.05532 |
let $ ( g _ { n } ) _ { n \ geq 1 } $ be a sequence of independent and identically distributed ( i. i. d. ) $ d \ times d $ real random matrices. for $ n \ geq 1 $ set $ g _ n = g _ n \ ldots g _ 1 $. given any starting point $ x = \ mathbb r v \ in \ mathbb { p } ^ { d - 1 } $, consider the markov chain $ x _ n ^ x = ... | arxiv:1907.02438 |
the study of local models using finite shared randomness originates from the consideration about the cost of classically simulating entanglement in composite quantum systems. we construct explicitly two families of local - hidden - state ( lhs ) models for t - states, by mapping the problem to the werner state. the con... | arxiv:1903.03957 |
common observations of the unpredictability of human behavior and the influence of one question on the answer to another suggest social science experiments are probabilistic and may be mutually incompatible with one another, characteristics attributed to quantum mechanics ( as distinguished from classical mechanics ). ... | arxiv:quant-ph/0307234 |
we formulate the frobenius - norm - based measures for quantum coherence and asymmetry respectively. in contrast to the resource theory of coherence and asymmetry, we construct a natural measure of quantum coherence inspired from optical coherence theory while the group theoretical approach is employed to quantify the ... | arxiv:1605.00789 |
the use of a wire probe is a robust method for beam profile measurement, but it can only provide a 1d projection of the beam profile. in this study, we developed a novel method for measuring a beam projected from a 360 { \ deg } angle by a dual - axis rotation of a wire probe and obtaining a complete 2d profile via ima... | arxiv:2503.13209 |
the physics learning is very important to techniques teaching and the engineers upbringing. however, there is evidence that science classes from elementary school through to university are generally failing to provide most students with an understanding of physics we have explored the use of a novel aspect of informati... | arxiv:1606.00245 |
this note proves the existence of universal rational parametrizations. the description involves homogeneous coordinates on a toric variety coming from a lattice polytope. we first describe how smooth toric varieties lead to universal rational parametrizations of certain projective varieties. we give numerous examples a... | arxiv:math/0303316 |
we use the erosita final equatorial - depth survey ( efeds ) to measure the rest - frame 0. 1 - 2. 4 kev band x - ray luminosities of $ \ sim $ 600, 000 desi groups using two different algorithms in the overlap region of the two observations. these groups span a large redshift range of $ 0. 0 \ le z _ g \ le 1. 0 $ and... | arxiv:2306.02594 |
due to high - cadence automated surveys, we can now detect and classify supernovae ( sne ) within a few days after explosion, if not earlier. early - time spectra of young sne directly probe the outermost layers of the ejecta, providing insights into the extent of stripping in the progenitor star and the explosion mech... | arxiv:2409.04522 |
in this paper we formulate a contract design problem where a primary license holder wishes to profit from its excess spectrum capacity by selling it to potential secondary users / buyers. it needs to determine how to optimally price the excess spectrum so as to maximize its profit, knowing that this excess capacity is ... | arxiv:1207.6445 |
we analyze the space - times admitting two shear - free geodesic null congruences. the integrability conditions are presented in a plain tensorial way as equations on the volume element $ u $ of the time - like 2 - - plane that these directions define. from these we easily deduce significant consequences. we obtain exp... | arxiv:gr-qc/0606015 |
we study the evolution of the universe in the presence of inflaton, matter, radiation, and holographic dark energy. the time evolution of the scale factor is obtained by solving the friedmann equation of the universe with a good approximation. we present two independent ways which determine the value of the dark energy... | arxiv:0804.2579 |
we present a modified version of the friends - of - friends ( fof ) structure finding algorithm, designed specifically to locate groups or clusters of galaxies in photometric redshift datasets. the main objective of this paper is to show that this extended friends - of - friends ( hereafter ext - fof ) algorithm yields... | arxiv:astro-ph/0312018 |
conversational question answering ( cqa ) aims to answer questions contained within dialogues, which are not easily interpretable without context. developing a model to rewrite conversational questions into self - contained ones is an emerging solution in industry settings as it allows using existing single - turn qa s... | arxiv:2210.15777 |
understanding the nature of neutrino masses will require physics beyond the long - standing standard model of particle physics. neutrinoless double beta decay experiments like the cryogenic underground observatory for rare events ( cuore ) are uniquely suited for probing the remaining mysteries of neutrino mass, partic... | arxiv:0910.2994 |
the topological phase transition in the qi - wu - zhang model is studied using a real - space approach. an effective hamiltonian for the topologically protected edge - modes in a finite - size system is developed. the topological phase transition is understood in terms of a global perturbation to the system which lifts... | arxiv:2403.01576 |
prediction of the shocks ' arrival times ( sats ) at the earth is very important for space weather forecast. there is a well - known sat model, stoa, which is widely used in the space weather forecast. however, the shock transit time from stoa model usually has a relative large error compared to the real measurements. ... | arxiv:1502.01069 |
the formation of early - type dwarf ( de ) galaxies, the most numerous objects in clusters, is believed to be closely connected to the physical processes that drive galaxy cluster evolution, like galaxy harassment and ram - pressure stripping. however, the actual significance of each mechanism for building the observed... | arxiv:0910.1594 |
the internal structure of the resonant lambda ( 1405 ) state is investigated based on meson - baryon coupled - channels chiral dynamics. we evaluate lambda ( 1405 ) form factors which are extracted from current - coupled scattering amplitudes in meson - baryon degrees of freedom. using several probe currents and channe... | arxiv:1109.0061 |
this theoretical review is intended to give non - theorists a flavor of the ideas driving the current efforts to experimentally find supersymmetry. we discuss the main reasons behind the expectation that supersymmetry may be " just around the corner " and may be discovered in the near future. we use simple quantum - me... | arxiv:hep-ph/9710274 |
topological materials are at the forefront of quantum materials research, offering tremendous potential for next - generation energy and information devices. however, current investigation of these materials remains largely focused on performance and often neglects the crucial aspect of sustainability. recognizing the ... | arxiv:2308.09526 |
learning - based perception and prediction modules in modern autonomous driving systems typically rely on expensive human annotation and are designed to perceive only a handful of predefined object categories. this closed - set paradigm is insufficient for the safety - critical autonomous driving task, where the autono... | arxiv:2210.08061 |
we present a new development in our approach to the covariant quantization of superstrings in 10 dimensions which is based on a gauged wznw model. to incorporate worldsheet diffeomorphisms we need the quartet of ghosts $ ( b _ { zz }, c ^ { z }, \ b _ { zz }, \ g ^ { z } ) $ for topological gravity. the currents of thi... | arxiv:hep-th/0307056 |
a purported ` ai singularity ' has been in the public eye recently. mass media and us national political attention focused on ` ai doom ' narratives hawked by social media influencers. the european commission is announcing initiatives to forestall ` ai extinction '. in my opinion, ` ai singularity ' is the wrong narrat... | arxiv:2310.00865 |
we consider the n = 4 sym theory in flat 3 + 1 dimensional spacetime with a time dependent coupling constant which vanishes at $ t = 0 $, like $ g _ { ym } ^ 2 = t ^ p $. in an analogous quantum mechanics toy model we find that the response is singular. the energy diverges at $ t = 0 $, for a generic state. in addition... | arxiv:0807.1517 |
we report a strong - field detection method for magnetic materials, based on the characterization of crystal time - reversal symmetry through the elliptical dichroism of harmonics. the consistency of the low - order harmonics driven by laser fields with opposite helicities originates from the time - reversal symmetry o... | arxiv:2505.06587 |
prior work has shown that text - conditioned diffusion models can learn to identify and manipulate primitive concepts underlying a compositional data - generating process, enabling generalization to entirely novel, out - of - distribution compositions. beyond performance evaluations, these studies develop a rich empiri... | arxiv:2410.08309 |
in this paper, we study the universal blind quantum computing ( ubqc ) protocol, which allows a client to perform quantum computation on a remote quantum server and the remote blind qubit state preparation ( rbsp ) protocol which allows the client to prepare single qubits on the server ' s location with week coherent p... | arxiv:1508.07910 |
we investigated the magnetic and magnetoelastic properties of mnsc $ _ 2 $ se $ _ 4 $ single crystals at low temperature under a magnetic field directed along the crystallographic [ 111 ] axis. the magnetization data at low temperature show a linear increase with magnetic field, until saturation is reached above 15 t. ... | arxiv:2410.20948 |
recently, sengupta and ghosh [ phys. fluids 34, 054116, ( 2022 ) ] published a linear stability analysis of a pressure - driven channel flow which is subject to rotation around a spanwise axis and a uniform magnetic field applied in the same direction. unfortunately, the formulation of the magnetohydrodynamic part of t... | arxiv:2209.15272 |
we study the graviton - photon conversion in the magnetic fields of the earth, the milky way galaxy, and intergalactic regions. requiring that the photon flux converted from gravitons does not exceed the observed photon flux with telescopes, we derive upper limits on the stochastic gravitational waves in frequency rang... | arxiv:2309.14765 |
primordial gravitational waves are created during the de sitter phase of an exponentially - expanding ( inflationary ) universe, due to quantum zero - point vacuum fluctuations. these waves produce fluctuations in the temperature of the cosmic background radiation ( cbr ). we calculate the multipole moments of the corr... | arxiv:astro-ph/9410024 |
to provide stable and responsive public sparql query services, data providers enforce quotas on server usage. queries which exceed these quotas are interrupted and deliver partial results. such interruption is not an issue if it is possible to resume queries execution afterward. unfortunately, there is no preemption mo... | arxiv:1902.04790 |
in portfolio analysis, the traditional approach of replacing population moments with sample counterparts may lead to suboptimal portfolio choices. i show that optimal portfolio weights can be estimated using a machine learning ( ml ) framework, where the outcome to be predicted is a constant and the vector of explanato... | arxiv:1804.01764 |
a to - date unsolved and highly limiting safety concern for ultra high - field ( uhf ) magnetic resonance imaging ( mri ) is the deposition of radiofrequency ( rf ) power in the body, quantified by the specific absorption rate ( sar ), leading to dangerous tissue heating / damage in the form of local sar hotspots that ... | arxiv:2102.01023 |
we test an optimised hopping parameter expansion on various z _ 2 lattice scalar field models : the ising model, a spin - one model and lambda ( phi ) ^ 4. we do this by studying the critical indices for a variety of optimisation criteria, in a range of dimensions and with various trial actions. we work up to seventh o... | arxiv:hep-ph/0406202 |
for any bott - samelson resolution $ q _ { i } : \ hat { x _ { i } } \ rightarrow g / b $ of the flag variety $ g / b $, and any torus equivariant oriented cohomology $ h _ t $, we compute the restriction formula of certain basis $ \ eta _ l $ of $ h _ t ( \ hat { x _ { i } } ) $ determined by the projective bundle for... | arxiv:2004.07680 |
we report results on electronic transport properties of liquid fe - s alloys at conditions of planetary cores, computed by first - principle techniques in the kubo - greenwood formalism. we describe a combined effect of resistivity saturation due to temperature, compression, and chemistry by comparing the electron mean... | arxiv:1803.02649 |
we study using first - principles calculations the energetics, structural and electronic properties of nitrogen incorporation in sio2. we consider no, nh, n2 and atomic n as the nitriding species interacting with a si - si bond of an otherwise perfect sio2 network in order to simulate the nitrogen incorporation near si... | arxiv:cond-mat/0311323 |
we demonstrate a tuneable, chip - scale wavelength reference to greatly reduce the complexity and volume of cold - atom sensors. a 1 mm optical path length micro - fabricated cell provides an atomic wavelength reference, with dynamic frequency control enabled by zeeman shifting the atomic transition through the magneti... | arxiv:2212.02853 |
the cm - wavelength radio flares on cygnus x - 3 have been studied for many years. our recent paper ( spencer et al., 2022 ) looked again at the minor flares ( flux density s of a few 100 mjy ) and compared their properties with those of a sample of major flares ( s > 1 jy ). we find that the minor flares have rise tim... | arxiv:2303.07353 |
natural radioactivity concentrations in high exposure building materials are commonly used in iran, which is measured a direct exposure by using { \ gamma } - ray spectrometry. the values for 226ra, 232th and 40k were in the ranges 3. 8 - 94. 2, 6. 5 - 172. 2 and 556. 9 - 1539. 2 bqkg - 1, respectively. the absorbed do... | arxiv:1502.04723 |
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