0
0.0

Jun 30, 2018
06/18

by
Farnaz Basiri; Jose Casadiego; Marc Timme; Dirk Witthaut

texts

######
eye 0

######
favorite 0

######
comment 0

We develop methods to efficiently reconstruct the topology and line parameters of a power grid from the measurement of nodal variables. We propose two compressed sensing algorithms that minimize the amount of necessary measurement resources by exploiting network sparsity, symmetry of connections and potential prior knowledge about the connectivity. The algorithms are reciprocal to established state estimation methods, where nodal variables are estimated from few measurements given the network...

Topics: Optimization and Control, Systems and Control, Computing Research Repository, Mathematics

Source: http://arxiv.org/abs/1701.09084

0
0.0

Jun 30, 2018
06/18

by
Jia Xu; Yong Yao

texts

######
eye 0

######
favorite 0

######
comment 0

This paper proposes a totally constructive approach for the proof of Hilbert's theorem on ternary quartic forms. The main contribution is the ladder technique, with which the Hilbert's theorem is proved vividly.

Topics: Algebraic Geometry, Symbolic Computation, Computing Research Repository, Mathematics

Source: http://arxiv.org/abs/1701.08294

0
0.0

Jun 30, 2018
06/18

by
Zohreh Shams; Marina De Vos; Julian Padget; Wamberto W. Vasconcelos

texts

######
eye 0

######
favorite 0

######
comment 0

Autonomous software agents operating in dynamic environments need to constantly reason about actions in pursuit of their goals, while taking into consideration norms which might be imposed on those actions. Normative practical reasoning supports agents making decisions about what is best for them to (not) do in a given situation. What makes practical reasoning challenging is the interplay between goals that agents are pursuing and the norms that the agents are trying to uphold. We offer a...

Topics: Artificial Intelligence, Computing Research Repository

Source: http://arxiv.org/abs/1701.08306

0
0.0

Jun 30, 2018
06/18

by
Pan Li; Arya Mazumdar; Olgica Milenkovic

texts

######
eye 0

######
favorite 0

######
comment 0

We propose a novel rank aggregation method based on converting permutations into their corresponding Lehmer codes or other subdiagonal images. Lehmer codes, also known as inversion vectors, are vector representations of permutations in which each coordinate can take values not restricted by the values of other coordinates. This transformation allows for decoupling of the coordinates and for performing aggregation via simple scalar median or mode computations. We present simulation results...

Topics: Learning, Artificial Intelligence, Computing Research Repository

Source: http://arxiv.org/abs/1701.09083

0
0.0

Jun 30, 2018
06/18

by
Azam Asanjarani; Yoni Nazarathy; Philip K. Pollett

texts

######
eye 0

######
favorite 0

######
comment 0

This is an annotated bibliography on estimation and inference results for queues and related stochastic models. The purpose of this document is to collect and categorise works in the field, allowing for researchers and practitioners to explore the various types of results that exist. This bibliography attempts to include all known works that satisfy both of these requirements: -Works that deal with queueing models. -Works that contain contributions related to the methodology of parameter...

Topics: Statistics Theory, Statistics, Computing Research Repository, Performance, Mathematics

Source: http://arxiv.org/abs/1701.08338

44
44

Jan 28, 2017
01/17

by
IASET JOURNALS

texts

######
eye 44

######
favorite 0

######
comment 0

The present experiment was conducted in the winter season during 2009-2010 and 2010-2011 at Seed Production Farm Adisaptagram, Govt of West Bengal, Hooghly, West Bengal with nine TPS collected from AICRP on potato, BCKV centre. The nine TPS hybrids were screened and evaluated for yield and other agronomic characters viz ., plant height, number of leaves per plant, number of tubers per plant, germination%, plant vigour, tuber weight gradation: 5g, 5-10 g, 10-20 g, 20-40 g, >40 g, tuber...

Topics: TPS, Potato, Correlation Coefficients, Genetic Advance, Path Analysis

0
0.0

Jun 30, 2018
06/18

by
Clifford A. Bearden

texts

######
eye 0

######
favorite 0

######
comment 0

In previous work, we defined and studied $\Sigma^*$-modules, a class of Hilbert $C^*$-modules over $\Sigma^*$-algebras (the latter are $C^*$-algebras that are sequentially closed in the weak operator topology). The present work continues this study by developing the appropriate $\Sigma^*$-algebraic analogue of the notion of strong Morita equivalence for $C^*$-algebras. We define strong $\Sigma^*$-Morita equivalence, prove a few characterizations, look at the relationship with equivalence of...

Topics: Operator Algebras, Mathematics

Source: http://arxiv.org/abs/1701.08333

0
0.0

Jun 30, 2018
06/18

by
İlke Çuğu; Eren Şener; Çağrı Erciyes; Burak Balcı; Emre Akın; Itır Önal; Ahmet Oğuz Akyüz

texts

######
eye 0

######
favorite 0

######
comment 0

We propose a novel tree classification system called Treelogy, that fuses deep representations with hand-crafted features obtained from leaf images to perform leaf-based plant classification. Key to this system are segmentation of the leaf from an untextured background, using convolutional neural networks (CNNs) for learning deep representations, extracting hand-crafted features with a number of image processing techniques, training a linear SVM with feature vectors, merging SVM and CNN...

Topics: Computing Research Repository, Computer Vision and Pattern Recognition

Source: http://arxiv.org/abs/1701.08291

0
0.0

Jun 30, 2018
06/18

by
Sima Bahrani; Mohsen Razavi; Jawad A. Salehi

texts

######
eye 0

######
favorite 0

######
comment 0

In this paper, we consider the problem of wavelength assignment in dense-wavelength-division-multiplexing (DWDM) systems that integrate both quantum and classical channels. This requires the transmission of weak quantum key distribution (QKD) signals alongside intense classical signals on the same fiber, where the former can be masked by the background noise induced by the latter. Here, we investigate how optimal wavelength assignment can mitigate this problem. We consider different DWDM...

Topic: Quantum Physics

Source: http://arxiv.org/abs/1701.08270

0
0.0

Jun 30, 2018
06/18

by
Xudong Sun; Pengcheng Wu; Steven C. H. Hoi

texts

######
eye 0

######
favorite 0

######
comment 0

In this report, we present a new face detection scheme using deep learning and achieve the state-of-the-art detection performance on the well-known FDDB face detetion benchmark evaluation. In particular, we improve the state-of-the-art faster RCNN framework by combining a number of strategies, including feature concatenation, hard negative mining, multi-scale training, model pretraining, and proper calibration of key parameters. As a consequence, the proposed scheme obtained the...

Topics: Computing Research Repository, Computer Vision and Pattern Recognition

Source: http://arxiv.org/abs/1701.08289

0
0.0

Jun 30, 2018
06/18

by
Mareile Große Ruse; Adeline Samson; Susanne Ditlevsen

texts

######
eye 0

######
favorite 0

######
comment 0

Modeling of longitudinal data often requires diffusion models that incorporate overall time-dependent, nonlinear dynamics of multiple components and provide sufficient flexibility for subject-specific modeling. This complexity challenges parameter inference and approximations are inevitable. We propose a method for approximate maximum-likelihood parameter estimation in multivariate time-inhomogeneous diffusions, where subject-specific flexibility is accounted for by incorporation of...

Topics: Statistics Theory, Statistics, Methodology, Mathematics

Source: http://arxiv.org/abs/1701.08284

0
0.0

Jun 30, 2018
06/18

by
M. A. Cordiner; N. Biver; J. Crovisier; D. Bockelee-Morvan; M. J. Mumma; S. B. Charnley; G. Villanueva; L. Paganini; D. C. Lis; S. N. Milam; A. J. Remijan; I. M. Coulson; Y. -J. Kuan; J. Boissier

texts

######
eye 0

######
favorite 0

######
comment 0

We present spatially and spectrally-resolved observations of CH$_3$OH emission from comet C/2012 K1 (PanSTARRS) using The Atacama Large Millimeter/submillimeter Array (ALMA) on 2014 June 28-29. Two-dimensional maps of the line-of-sight average rotational temperature ($T_{rot}$) were derived, covering spatial scales $0.3''-1.8''$ (corresponding to sky-projected distances $\rho\sim500$-2500 km). The CH$_3$OH column density distributions are consistent with isotropic, uniform outflow from the...

Topics: Astrophysics, Earth and Planetary Astrophysics

Source: http://arxiv.org/abs/1701.08258

2
2.0

Jun 30, 2018
06/18

by
C. Colodro-Conde; S. Velasco; J. J. F. Valdivia; R. L. López; A. Oscoz; R. Rebolo; B. Femenía; D. L. King; L. Labadie; C. Mackay; B. Muthusubramanian; A. Pérez Garrido; M. Puga; G. Rodríguez-Coira; L. F. Rodríguez-Ramos; J. M. Rodríguez-Ramos; R. Toledo-Moreo; I. Villó-Pérez

texts

######
eye 2

######
favorite 0

######
comment 0

AOLI (Adaptive Optics Lucky Imager) is a state-of-art instrument that combines adaptive optics (AO) and lucky imaging (LI) with the objective of obtaining diffraction limited images in visible wavelength at mid- and big-size ground-based telescopes. The key innovation of AOLI is the development and use of the new TP3-WFS (Two Pupil Plane Positions Wavefront Sensor). The TP3-WFS, working in visible band, represents an advance over classical wavefront sensors such as the Shack-Hartmann WFS...

Topics: Instrumentation and Methods for Astrophysics, Astrophysics

Source: http://arxiv.org/abs/1701.08307

0
0.0

Jun 30, 2018
06/18

by
Stefan Steinerberger

texts

######
eye 0

######
favorite 0

######
comment 0

Let $(x_n)_{n=1}^{\infty}$ be a sequence on the torus $\mathbb{T}$ (normalized to length 1). We show that if there exists a sequence of positive real numbers $(t_n)_{n=1}^{\infty}$ converging to 0 such that $$ \lim_{N \rightarrow \infty}{\frac{1}{N^2} \sum_{m,n = 1}^{N}{\frac{1}{\sqrt{t_N}} \exp{\left(- \frac{1}{t_N} (x_m - x_n)^2 \right)}}} = \sqrt{\pi},$$ then $(x_n)_{n=1}^{\infty}$ is uniformly distributed. This is especially interesting when $t_N \sim N^{-2}$ since the size of the sum is...

Topics: Metric Geometry, Number Theory, Mathematics

Source: http://arxiv.org/abs/1701.08323

0
0.0

Jun 30, 2018
06/18

by
Philippe de Forcrand; Paul Romatschke; Wolfgang Unger; Helvio Vairinhos

texts

######
eye 0

######
favorite 0

######
comment 0

In the strong coupling limit, $n$-point functions in lattice QCD with staggered fermions can be rewritten exactly as sums over constrained configurations of monomers, dimers, and baryon loops covering the spacetime lattice. Worm algorithms provide efficient global sampling methods over such ensembles, and are particularly efficient in the chiral limit. We study the thermodynamics of strongly-coupled U(3) and SU(3) lattice QCD with one massless staggered fermion using such methods, and compare...

Topic: High Energy Physics - Lattice

Source: http://arxiv.org/abs/1701.08324

1
1.0

Jun 30, 2018
06/18

by
Luís Felipe Gonçalves Fonseca; Thiago Castilho de Mello

texts

######
eye 1

######
favorite 0

######
comment 0

Let $F$ be an infinite field, and let $M_{n}(F)$ be the algebra of $n\times n$ matrices over $F$. Suppose that this algebra is equipped with an elementary grading whose neutral component coincides with the main diagonal. In this paper, we find a basis for the graded polynomial identities of $M_{n}(F)$ with the transpose involution. Our results generalize for infinite fields of arbitrary characteristic previous results in the literature which were obtained for the field of complex numbers and...

Topics: Rings and Algebras, Mathematics

Source: http://arxiv.org/abs/1701.08316

0
0.0

Jun 30, 2018
06/18

by
Sibo Cheng; Adissa Laurent; Paul Van Dooren

texts

######
eye 0

######
favorite 0

######
comment 0

Computing meaningful clusters of nodes is crucial to analyse large networks. In this paper, we apply new clustering methods to improve the computational time. We use the properties of the adjacency matrix to obtain better role extraction. We also define a new non-recursive similarity measure and compare its results with the ones obtained with Browet's similarity measure. We will show the extraction of the different roles with a linear time complexity. Finally, we test our algorithm with real...

Topics: Physics, Computing Research Repository, Social and Information Networks, Physics and Society

Source: http://arxiv.org/abs/1702.06154

0
0.0

Jun 30, 2018
06/18

by
Sher Alam; Subhasish Behera; Satendra Kumar; Shibananda Sahoo

texts

######
eye 0

######
favorite 0

######
comment 0

Higgs boson couplings with gauge bosons are probed through $e^-e^+ \rightarrow Z \gamma h$ in an effective Lagrangian framework. For this study the beam polarization facility at the ILC along with the typical center-of-mass energy of 500 GeV is considered. The reach of the ILC with an integrated luminosity of 300 fb$^{-1}$ in the determination of $CP$-conserving parameters is obtained. Sensitivity of the probe of each of these couplings in the presence of other couplings is investigated. The...

Topic: High Energy Physics - Phenomenology

Source: http://arxiv.org/abs/1701.08250

0
0.0

Jun 30, 2018
06/18

by
Stefan Siersdorfer; Philipp Kemkes; Hanno Ackermann; Sergej Zerr

texts

######
eye 0

######
favorite 0

######
comment 0

Social network analysis is leveraged in a variety of applications such as identifying influential entities, detecting communities with special interests, and determining the flow of information and innovations. However, existing approaches for extracting social networks from unstructured Web content do not scale well and are only feasible for small graphs. In this paper, we introduce novel methodologies for query-based search engine mining, enabling efficient extraction of social networks from...

Topics: Information Retrieval, Computing Research Repository, Social and Information Networks

Source: http://arxiv.org/abs/1701.08285

2
2.0

Jun 30, 2018
06/18

by
Nasrin Mostafazadeh; Chris Brockett; Bill Dolan; Michel Galley; Jianfeng Gao; Georgios P. Spithourakis; Lucy Vanderwende

texts

######
eye 2

######
favorite 0

######
comment 0

The popularity of image sharing on social media and the engagement it creates between users reflects the important role that visual context plays in everyday conversations. We present a novel task, Image-Grounded Conversations (IGC), in which natural-sounding conversations are generated about a shared image. To benchmark progress, we introduce a new multiple-reference dataset of crowd-sourced, event-centric conversations on images. IGC falls on the continuum between chit-chat and goal-directed...

Topics: Artificial Intelligence, Computing Research Repository, Computer Vision and Pattern Recognition,...

Source: http://arxiv.org/abs/1701.08251

5
5.0

Jun 30, 2018
06/18

by
Ebrahim Ansari; M. H. Sadreddini; Lucio Grandinetti; Mehdi Sheikhalishahi

texts

######
eye 5

######
favorite 0

######
comment 0

Bilingual dictionaries are very important in various fields of natural language processing. In recent years, research on extracting new bilingual lexicons from non-parallel (comparable) corpora have been proposed. Almost all use a small existing dictionary or other resource to make an initial list called the "seed dictionary". In this paper we discuss the use of different types of dictionaries as the initial starting list for creating a bilingual Persian-Italian lexicon from a...

Topics: Computing Research Repository, Computation and Language

Source: http://arxiv.org/abs/1701.08340

2
2.0

Jun 30, 2018
06/18

by
Pan Li; Olgica Milenkovic

texts

######
eye 2

######
favorite 0

######
comment 0

We introduce a new family of minmax rank aggregation problems under two distance measures, the Kendall {\tau} and the Spearman footrule. As the problems are NP-hard, we proceed to describe a number of constant-approximation algorithms for solving them. We conclude with illustrative applications of the aggregation methods on the Mallows model and genomic data.

Topics: Quantitative Methods, Learning, Computing Research Repository, Machine Learning, Quantitative...

Source: http://arxiv.org/abs/1701.08305

0
0.0

Jun 30, 2018
06/18

by
A. I. Bandura; O. B. Skaskiv

texts

######
eye 0

######
favorite 0

######
comment 0

In this paper, there are obtained growth estimates of entire in $\mathbb{C}^n$ function of bounded $\mathbf{L}$-index in joint variables. They describe the behaviour of maximum modulus of entire function on a skeleton in a polydisc by behaviour of the function $\mathbf{L}(z)=(l_1(z),\ldots,l_n(z)),$ where for every $j\in\{1,\ldots, n\}$ \ $l_j:\mathbb{C}^n\to \mathbb{R}_+$ is a continuous function. We generalised known results of W. K. Hayman, M. M. Sheremeta, A. D. Kuzyk, M. T. Borduyak, T. O....

Topics: Complex Variables, Mathematics

Source: http://arxiv.org/abs/1701.08276

1
1.0

Jun 30, 2018
06/18

by
Christian Reinhardt; Joachim Stadel

texts

######
eye 1

######
favorite 0

######
comment 0

In this paper we present solutions to three short comings of Smoothed Particles Hydrodynamics (SPH) encountered in previous work when applying it to Giant Impacts. First we introduce a novel method to obtain accurate SPH representations of a planet's equilibrium initial conditions based on equal area tessellations of the sphere. This allows one to imprint an arbitrary density and internal energy profile with very low noise which substantially reduces computation because these models require no...

Topics: Fluid Dynamics, Physics, Computational Physics, Astrophysics, Earth and Planetary Astrophysics

Source: http://arxiv.org/abs/1701.08296

1
1.0

Jun 30, 2018
06/18

by
Mohamad Jaafar Ali; Hassine Moungla; Ahmed Mehaoua

texts

######
eye 1

######
favorite 0

######
comment 0

Recent advances in microelectronics have enabled the realization of Wireless Body Area Networks (WBANs). Increasing the transmission power of WBAN's nodes improves the Signal to Interference plus Noise Ratio (SINR), and hence decreases the bit error probability. However, this increase may impose interference on nodes within the same WBAN or on other nodes of nearby coexisting WBANs, as these WBANs may use similar frequencies. Due to co-channel interference, packet collisions and retransmissions...

Topics: Networking and Internet Architecture, Computing Research Repository

Source: http://arxiv.org/abs/1701.08295

0
0.0

Jun 30, 2018
06/18

by
Anton Kapustin; Ryan Thorngren

texts

######
eye 0

######
favorite 0

######
comment 0

We discuss bosonization and Fermionic Short-Range-Entangled (FSRE) phases of matter in one, two, and three spatial dimensions, emphasizing the physical meaning of the cohomological parameters which label such phases and the connection with higher-form symmetries. We propose a classification scheme for fermionic SPT phases in three spatial dimensions with an arbitrary finite point symmetry G. It generalizes the supercohomology of Gu and Wen. We argue that the most general such phase can be...

Topics: Strongly Correlated Electrons, High Energy Physics - Theory, Condensed Matter

Source: http://arxiv.org/abs/1701.08264

0
0.0

Jun 30, 2018
06/18

by
The BABAR Collaboration

texts

######
eye 0

######
favorite 0

######
comment 0

We study the processes $e^+ e^-\to K^0_S K^0_L\pi^0\gamma$, $K^0_S K^0_L\eta\gamma$, and $K^0_S K^0_L\pi^0\pi^0\gamma$, where the photon is radiated from the initial state, providing cross section measurements for the hadronic final states over a continuum of center-of-mass energies. The results are based on 469~$fb^{-1}$ of data collected at or near the $\Upsilon(4S)$~ resonance with the BaBar detector at SLAC. We present the first measurements of the $e^+ e^-\to K^0_S K^0_L\pi^0$, $K^0_S...

Topic: High Energy Physics - Experiment

Source: http://arxiv.org/abs/1701.08297

3
3.0

Jun 30, 2018
06/18

by
Yoju Fujino; Tadashi Wadayama

texts

######
eye 3

######
favorite 0

######
comment 0

In this paper, we propose a construction of non-binary WOM (Write-Once-Memory) codes for WOM storages such as flash memories. The WOM codes discussed in this paper are fixed rate WOM codes where messages in a fixed alphabet of size $M$ can be sequentially written in the WOM storage at least $t^*$-times. In this paper, a WOM storage is modeled by a state transition graph. The proposed construction has the following two features. First, it includes a systematic method to determine the encoding...

Topics: Information Theory, Computing Research Repository, Mathematics

Source: http://arxiv.org/abs/1701.08347

1
1.0

Jun 30, 2018
06/18

by
Andreas Nink

texts

######
eye 1

######
favorite 0

######
comment 0

In this thesis we investigate various fundamental aspects of asymptotically safe quantum gravity, in particular the compatibility of Asymptotic Safety with the requirements for background independence and unitarity. The first part contains a detailed analysis of the space of metrics. We unveil a novel, specifically designed connection on this space and use the corresponding geodesics to connect all metrics having the same signature. In the second part we study the consequences of different...

Topics: High Energy Physics - Theory, General Relativity and Quantum Cosmology, Mathematical Physics,...

Source: http://arxiv.org/abs/1701.08344

1
1.0

Jun 30, 2018
06/18

by
Carlos Bocker-Neto; Ricardo Bortolotti

texts

######
eye 1

######
favorite 0

######
comment 0

Consider a dynamical system $T:\mathbb{T}\times \mathbb{R}^{d} \rightarrow \mathbb{T}\times \mathbb{R}^{d} $ given by $ T(x,y) = (E(x), C(y) + f(x))$, where $E$ is a linear expanding map of $\mathbb{T}$, $C$ is a linear contracting map of $\mathbb{R}^d$ and $f$ is in $C^2(\mathbb{T},\mathbb{R}^d)$. We prove that if $T$ is volume expanding and $u\geq d$, then for every $E$ there exists an open set $\mathcal{U}$ of pairs $(C,f)$ for which the corresponding dynamic $T$ admits an absolutely...

Topics: Dynamical Systems, Mathematics

Source: http://arxiv.org/abs/1701.08342

0
0.0

Jun 30, 2018
06/18

by
Christoph Becker; Dawn Walker; Curtis McCord

texts

######
eye 0

######
favorite 0

######
comment 0

When making choices in software projects, engineers and other stakeholders engage in decision making that involves uncertain future outcomes. Research in psychology, behavioral economics and neuroscience has questioned many of the classical assumptions of how such decisions are made. This literature review aims to characterize the assumptions that underpin the study of these decisions in Software Engineering. We identify empirical research on this subject and analyze how the role of time has...

Topics: Software Engineering, Computing Research Repository

Source: http://arxiv.org/abs/1701.08310

1
1.0

Jun 30, 2018
06/18

by
Ronald L. Rivest

texts

######
eye 1

######
favorite 0

######
comment 0

We propose a simple risk-limiting audit for elections, ClipAudit. To determine whether candidate A (the reported winner) actually beat candidate B in a plurality election, ClipAudit draws ballots at random, without replacement, until either all cast ballots have been drawn, or until \[ a - b \ge \beta \sqrt{a+b} \] where $a$ is the number of ballots in the sample for the reported winner A, and $b$ is the number of ballots in the sample for opponent B, and where $\beta$ is a constant determined...

Topics: Cryptography and Security, Statistics, Applications, Computing Research Repository

Source: http://arxiv.org/abs/1701.08312

0
0.0

Jun 30, 2018
06/18

by
Imre Leader; Luka Milićević; Ta Sheng Tan

texts

######
eye 0

######
favorite 0

######
comment 0

Let $f_r(n)$ be the minimum number of complete $r$-partite $r$-graphs needed to partition the edge set of the complete $r$-uniform hypergraph on $n$ vertices. Graham and Pollak showed that $f_2(n) = n-1$. An easy construction shows that $f_r(n)\le (1-o(1))\binom{n}{\lfloor r/2\rfloor}$ and it has been unknown if this upper bound is asymptotically sharp. In this paper we show that $f_r(n)\le (\frac{14}{15}+o(1))\binom{n}{r/2}$ for each even $r\ge 4$.

Topics: Combinatorics, Mathematics

Source: http://arxiv.org/abs/1701.08335

1
1.0

Jun 30, 2018
06/18

by
Viktor Witkovsky; Gejza Wimmer; Tomas Duby

texts

######
eye 1

######
favorite 0

######
comment 0

A non-parametric method for evaluation of the aggregate loss distribution (ALD) by combining and numerically inverting the empirical characteristic functions (CFs) is presented and illustrated. This approach to evaluate ALD is based on purely non-parametric considerations, i.e., based on the empirical CFs of frequency and severity of the claims in the actuarial risk applications. This approach can be, however, naturally generalized to a more complex semi-parametric modeling approach, e.g., by...

Topics: Computation, Statistics, Risk Management, Applications, Quantitative Finance

Source: http://arxiv.org/abs/1701.08299

0
0.0

Jun 30, 2018
06/18

by
Peilong Hong

texts

######
eye 0

######
favorite 0

######
comment 0

Random scattering is usually viewed as a serious nuisance in optical imaging, and needs to be prevented in the conventional imaging scheme based on single-photon interference. Here we proposed a two-photon imaging scheme with the widely used lens replaced by a dynamic random medium. In contrast to destroying imaging process, the dynamic random medium in our scheme works as a crucial imaging element to bring constructive interference, and allows us to image an object from light field scattered...

Topics: Optics, Physics

Source: http://arxiv.org/abs/1701.08348

1
1.0

Jun 30, 2018
06/18

by
Joseph Doolittle

texts

######
eye 1

######
favorite 0

######
comment 0

We present a partial description of which polytopes are reconstructible from their graphs. This is an extension of work by Blind and Mani (1987) and Kalai (1988), which showed that simple polytopes can be reconstructed from their graphs. In particular, we introduce a notion of $h$-nearly simple and prove that 1-nearly simple and 2-nearly simple polytopes are reconstructible from their graphs. We also give an example of a 3-nearly simple polytope which is not reconstructible from its graph....

Topics: Combinatorics, Mathematics

Source: http://arxiv.org/abs/1701.08334

6
6.0

Jun 30, 2018
06/18

by
Ebrahim Ansari; M. H. Sadreddini; Mostafa Sheikhalishahi; Richard Wallace; Fatemeh Alimardani

texts

######
eye 6

######
favorite 0

######
comment 0

The effectiveness of a statistical machine translation system (SMT) is very dependent upon the amount of parallel corpus used in the training phase. For low-resource language pairs there are not enough parallel corpora to build an accurate SMT. In this paper, a novel approach is presented to extract bilingual Persian-Italian parallel sentences from a non-parallel (comparable) corpus. In this study, English is used as the pivot language to compute the matching scores between source and target...

Topics: Computing Research Repository, Computation and Language

Source: http://arxiv.org/abs/1701.08339

0
0.0

Jun 30, 2018
06/18

by
Emil J. Zak; Jonathan Tennyson; Oleg L. Polyansky; Lorenzo Lodi; Nikolay F. Zobov; Sergei A. Tashkun; Valery I. Perevalov

texts

######
eye 0

######
favorite 0

######
comment 0

Remote sensing experiments require high-accuracy, preferably sub-percent, line intensities and in response to this need we present computed room temperature line lists for six symmetric isotopologues of carbon dioxide: $^{13}$C$^{16}$O$_2$, $^{14}$C$^{16}$O$_2$, $^{12}$C$^{17}$O$_2$, $^{12}$C$^{18}$O$_2$, $^{13}$C$^{17}$O$_2$ and $^{13}$C$^{18}$O$_2$, covering the range 0-8000 \cm. Our calculation scheme is based on variational nuclear motion calculations and on a reliability analysis of the...

Topics: Atmospheric and Oceanic Physics, Physics, Solar and Stellar Astrophysics, Astrophysics, Earth and...

Source: http://arxiv.org/abs/1701.08267

0
0.0

Jun 30, 2018
06/18

by
Aliou Sow; Roman E. Semenko; Aslan R. Kasimov

texts

######
eye 0

######
favorite 0

######
comment 0

We use numerical simulations of the reactive Euler equations to analyze the nonlinear stability of steady-state one-dimensional solutions for gaseous detonations in the presence of both momentum and heat losses. Our results point to a possible stabilization mechanism for the low velocity detonations in such systems. The mechanism stems from the existence of a one-parameter family of solutions found in Semenko et al. (Shock Waves 26 (2), 141-160, 2016).

Topics: Fluid Dynamics, Physics

Source: http://arxiv.org/abs/1701.08265

0
0.0

Jun 30, 2018
06/18

by
Hadi Goudarzi; Maryam Khezerlou; Samin Asgarifar

texts

######
eye 0

######
favorite 0

######
comment 0

Among the potential applications of topological insulators, we investigate theoretically the effect of coexistence of proximity-induced ferromagnetism and superconductivity on the surface states of 3-dimensional topological insulator, where the superconducting electron-hole excitations can be significantly affected by the magnetization of ferromagnetic order. We find that, Majorana mode energy, as a verified feature of TI F/S structure, along the interface sensitively depends on the magnitude...

Topics: Mesoscale and Nanoscale Physics, Condensed Matter

Source: http://arxiv.org/abs/1701.08275

0
0.0

Jun 30, 2018
06/18

by
Norio Konno; Iwao Sato; Etsuo Segawa

texts

######
eye 0

######
favorite 0

######
comment 0

Recently, the staggered quantum walk (SQW) on a graph is discussed as a generalization of coined quantum walks on graphs and Szegedy walks. We present a formula for the time evolution matrix of a 2-tessellable SQW on a graph, and so directly give its spectra. Furthermore, we present a formula for the Szegedy matrix of a bipartite graph by the same method, and so give its spectra. As an application, we present a formula for the characteristic polynomial of the modified Szegedy matrix in the...

Topics: Mathematical Physics, Mathematics

Source: http://arxiv.org/abs/1701.08274

0
0.0

Jun 30, 2018
06/18

by
Murat Kocaoglu; Alexandros G. Dimakis; Sriram Vishwanath; Babak Hassibi

texts

######
eye 0

######
favorite 0

######
comment 0

We study the problem of identifying the causal relationship between two discrete random variables from observational data. We recently proposed a novel framework called entropic causality that works in a very general functional model but makes the assumption that the unobserved exogenous variable has small entropy in the true causal direction. This framework requires the solution of a minimum entropy coupling problem: Given marginal distributions of m discrete random variables, each on n...

Topics: Computing Research Repository, Machine Learning, Information Theory, Statistics, Artificial...

Source: http://arxiv.org/abs/1701.08254

0
0.0

Jun 30, 2018
06/18

by
Nicolas Gisin

texts

######
eye 0

######
favorite 0

######
comment 0

We present the quantum measurement problem as a serious physics problem. Serious because without a resolution, quantum theory is not complete, as it does not tell how one should - in principle - perform measurements. It is physical in the sense that the solution will bring new physics, i.e. new testable predictions, hence it is not merely a matter of interpretation of a frozen formalism. I argue that the two popular ways around the measurement problem, many-worlds and Bohmian-like mechanics,...

Topic: Quantum Physics

Source: http://arxiv.org/abs/1701.08300

0
0.0

Jun 30, 2018
06/18

by
Cinzia Bisi; Graziano Gentili

texts

######
eye 0

######
favorite 0

######
comment 0

Quaternionic tori are defined as quotients of the skew field $\mathbb{H}$ of quaternions by rank-4 lattices. Using slice regular functions, these tori are endowed with natural structures of quaternionic manifolds (in fact quaternionic curves), and a fundamental region in a $12$-dimensional real subspace is then constructed to classify them up to biregular diffeomorphisms. The points of the moduli space correspond to suitable \emph{special} bases of rank-4 lattices, which are studied with...

Topics: Algebraic Geometry, Complex Variables, Mathematics

Source: http://arxiv.org/abs/1701.08304

0
0.0

Jun 30, 2018
06/18

by
Yosuke Nakata; Yudai Taira; Toshihiro Nakanishi; Fumiaki Miyamaru

texts

######
eye 0

######
favorite 0

######
comment 0

We designed a cut-wire-pair metasurface that works as a transparent terahertz half-wave plate, by matching the electric and magnetic resonances of the structure. Due to the impedance matching nature of the resonances, a large transmission phase shift between the orthogonal polarizations was achieved, while permitting a high transmission. The electric and magnetic responses of the proposed structure were confirmed by evaluating the electric admittance and magnetic impedance. The structure was...

Topics: Optics, Physics

Source: http://arxiv.org/abs/1701.08346

1
1.0

Jun 30, 2018
06/18

by
Giovanni Carraro; David Turner; Daniel Majaess; Gustavo Baume; Roberto Gamen; Jose Molina Lera

texts

######
eye 1

######
favorite 0

######
comment 0

Photometric CCD {\it UBVI}$_C$ photometry obtained for 4860 stars surrounding the embedded southern cluster SAI~113 (Skiff~8) is used to examine the reddening in the field and derive the distance to the cluster and nearby van~Genderen~1. Spectroscopic color excesses for bright cluster stars, photometric reddenings for A3 dwarfs, and dereddening of cluster stars imply that the reddening and extinction laws match results derived for other young clusters in Carina: E$_{U-B}/$E$_{B-V} \simeq 0.64$...

Topics: Astrophysics of Galaxies, Astrophysics

Source: http://arxiv.org/abs/1701.08319

0
0.0

Jun 30, 2018
06/18

by
Baigong Zheng

texts

######
eye 0

######
favorite 0

######
comment 0

We present the first polynomial-time approximation schemes, i.e., (1 + {\epsilon})-approximation algorithm for any constant {\epsilon} > 0, for the minimum three-edge connected spanning subgraph problem and the minimum three-vertex connected spanning subgraph problem in undirected planar graphs. Both the approximation schemes run in linear time.

Topics: Data Structures and Algorithms, Computing Research Repository

Source: http://arxiv.org/abs/1701.08315

0
0.0

Jun 30, 2018
06/18

by
J. S. Langer

texts

######
eye 0

######
favorite 0

######
comment 0

The statistical-thermodynamic dislocation theory developed in previous papers is used here in an analysis of yielding transitions and grain-size effects in polycrystalline solids. Calculations are based on the 1995 experimental results of Meyers et al. for polycrystalline copper under strain-hardening conditions. The main assertion is that the well known Hall-Petch effects are caused by enhanced strengths of dislocation sources at the edges of grains instead of the commonly assumed resistance...

Topics: Materials Science, Condensed Matter

Source: http://arxiv.org/abs/1701.08336

0
0.0

Jun 30, 2018
06/18

by
Fouad Naderi

texts

######
eye 0

######
favorite 0

######
comment 0

We use a method similar to ultraproducts to study the common fixed point of a left reversible semitopological semigroup acting on a Banach space. As an application, we prove a Bruck-type theorem for nearly uniformly convex Banach spaces to the effect that such spaces have weak fixed point property for left reversible semigroups.

Topics: Functional Analysis, Mathematics

Source: http://arxiv.org/abs/1702.00274

0
0.0

Jun 30, 2018
06/18

by
José Cantarero; Natàlia Castellana; Lola Morales

texts

######
eye 0

######
favorite 0

######
comment 0

In this paper we obtain a description of the Grothendieck group of complex vector bundles over the classifying space of a p-local finite group in terms of representation rings of subgroups of its Sylow. We also prove a stable elements formula for generalized cohomological invariants of p-local finite groups, which is used to show the existence of unitary embeddings of p-local finite groups. Finally, we show that the augmentation map for the cochains of the classifying space of a p-local finite...

Topics: Algebraic Topology, Group Theory, Mathematics

Source: http://arxiv.org/abs/1701.08309