cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Hardware Implementation of Algorithm for Cryptanalysis
Creators: name: Zodpe, Harshali
name: Wani, Prakash
name: Mehta, Rakesh
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cryptography and Security (cs.CR)
subject: Hardware Architecture (cs.AR)
subject: FOS: Computer and information sciences

description: Cryptanalysis of block ciphers involves massive computations which are independent of each other and can be instantiated simultaneously so that the solution space is explored at a faster rate. With the advent of low cost Field Programmable Gate Arrays, building special purpose hardware for computationally intensive applications has now become possible. For this the Data Encryption Standard is used as a proof of concept. This paper presents the design for Hardware implementation of DES cryptanalysis on FPGA using exhaustive key search. Two architectures viz. Rolled and Unrolled DES architecture are compared and based on experimental result the Rolled architecture is implemented on FPGA. The aim of this work is to make cryptanalysis faster and better.
description: 9 pages, 7 figures
A spatial transcriptomic study on tomato callus
Creators: name: 陈立川
Publisher: name: CNGB
Year: 2023
Subjects: Raw sequence reads
Transcriptome or Gene expression
Monoisolate

description: This project utilized BGI stereo-seq technology to perform the single-cell spatial transcriptome research on tomato callus, revealing the cell heterogeneity of tomato callus, displaying the spatial structure relationship among various cell groups, exploring the molecular characteristics and development trajectory of tomato shoot primordia, and the possible role of vascular tissue in tomato callus. It provides valuable resources for studying the molecular mechanism of plant regeneration process in tomato.
Crocidolomia binotalis Zeller
Creators: name: Swezey, O. H.
Publisher: name: Zenodo
Year: 1942
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Lepidoptera
Crambidae
Crocidolomia
Crocidolomia binotalis

description: 35.Crocidolomia binotalis Zeller, K. Vet.-Akad., Handl. (1852), 66, 1854; Hampson, Fauna Brit. India, Moths 4: 372, 1896. Piti, May 14, reared from cabbage, Swezey; Piti, Aug. 13, 26, Oct. 14, at light, Swezey. Three specimens at Bishop Museum, Fullaway, 1911. This moth is widely distributed from South Africa through southern Asia to Formosa, Java, Australia and Norfolk Island. The caterpillars feed on mustard, radish, cabbage, and other cruciferous plants in India. I found it on cabbage at Piti, Guam, but not as commonly as Hellula undalis.
description: Published as part of Swezey, O. H., 1946, Lepidoptera, Geometridae, Arctiidae, Agrotidae, and Pyralidae of Guam, pp. 163-185 in Insects of Guam II, Honolulu, Hawaii :Bernice P. Bishop Museum Bulletin 189 on page 183, DOI: 10.5281/zenodo.5165313
Rally for Charles Sutton
Creators: name: (:Unav)
Publisher: name: Columbia University
Year: 2021
Subjects: Police brutality
African Americans--Crimes against
Demonstrations

description: Speakers are Lynn Scarborough, partner of Charles Sutton; [Dehati Changa?], Congress of African Peoples; Kufadi, Black Panther Party; Margie, Puerto Rican Socialist Party; Jenny, Rutgers University
Surface changes motion types: : divergent (spreading) – Ice-land; convergent (subduction) – Nepal; transform (lateral sliding) – California, USA.
Creators: name: Maciuk, Kamil
Publisher: name: Zenodo
Year: 2021

description: Practical examination of the surface changes motion types: : divergent (spreading) – Iceland; convergent (subduction) – Nepal; transform (lateral sliding) – California, USA.
Parallel harmonic balance method for analysis of nonlinear mechanical systems
Creators: name: Blahos, Jiri
Publisher: name: Imperial College London
Year: 2022

description: Mechanical vibration analysis and modelling are essential tools used in the design of various mechanical components and structures. In the case of turbine engine design specifically, the ability to accurately predict vibration of various parts is crucial to ensure their safe operation while maintaining efficiency. As the designs become increasingly complex and margins for errors get smaller, high fidelity numerical vibration models are necessary for their analysis. Research of parallel algorithms has progressed significantly in the last decades, thanks to the exponential growth of the world's available computational resources. This work explores the possibilities for parallel implementations for solving large scale nonlinear vibration problems. A C++ code using MPI was developed to validate these implementations in practice. The harmonic balance method is used in combination with finite elements discretisation and applied to an elastic body with the Green-Lagrange nonlinear model for large deformations. A parameter continuation scheme using a predictor-corrector approach is included to compute frequency response functions. A Newton-Raphson solver is used to solve the bordered nonlinear system of equations in the frequency domain. Three different parallel algorithms for solving the linearised problem in each Newton iteration are analysed - a sparse direct solver (using MUMPS library), GMRES (using PETSc library) and an inhouse implementation of FETI. The performance of the solvers is analysed using beam testcases and a fan blade geometry. Scalability of MUMPS and the FETI solver is assessed. Full nonlinear frequency response functions with turning points are also computed. Use of artificial coarse space and preconditioning in FETI is discussed as it greatly impacts convergence properties of the solver. The presented parallel linear solvers show promising scalability results and an ability to solve nonlinear systems of several million degrees of freedom.
Approximate Sum-Capacity of the Y-channel
Creators: name: Chaaban, Anas
name: Sezgin, Aydin
name: Avestimehr, A. Salman
Publisher: name: arXiv
Year: 2013
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: A network where three users want to establish multiple unicasts between each other via a relay is considered. This network is called the Y-channel and resembles an elemental ingredient of future wireless networks. The sum-capacity of this network is studied. A characterization of the sum-capacity within an additive gap of 2 bits, and a multiplicative gap of 4, for all values of channel gains and transmit powers is obtained. Contrary to similar setups where the cut-set bounds can be achieved within a constant gap, they can not be achieved in our case, where they are dominated by our new genie-aided bounds. Furthermore, it is shown that a time-sharing strategy, in which at each time two users exchange information using coding strategies of the bi-directional relay channel, achieves the upper bounds to within a constant gap. This result is further extended to the K-user case, where it is shown that the same scheme achieves the sum-capacity within 2log(K-1) bits.
description: 36 pages, 8 figures, accepted for publication in IEEE Trans. Info. Theory. arXiv admin note: text overlap with arXiv:1102.2787
Chaltenobatrachus Basso, Úbeda, Bunge & Martinazzo, 2011, gen. nov.
Creators: name: Basso, Néstor G.
name: Úbeda, Carmen A.
name: Bunge, María M.
name: Martinazzo, Liza B.
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Amphibia
Anura
Ceratophryidae
Chaltenobatrachus

description: Chaltenobatrachus gen. nov.
 Type species. Telmatobius grandisonae Lynch, 1975
 Content. The genus is monotypic
 Definition and diagnosis. Size small to medium, up to 46 mm SVL. Dorsal coloration uniform bright green, with brown to reddish warts. Dorsal skin thin and mucoid, finely granulated. Iris orange. Vomerine teeth in two patches between and at posterior level of the choana. Tympanum and columella absent. Fingers with evident interdigital membrane. Plantar skin turgid with low metatarsal tubercles. Supernumerary palmar and plantar tubercles absent. Length of toes in increasing order: 1–2–5–3–4. Frontoparietals moderately extensive, exposing a thin frontoparietal fontanelle. Nasals relatively small, separated medially. Independent quadratojugal absent. Alary processes of premaxillae extensive, directed dorsally. Maxillary teeth extending up to the middle of the orbit. Palatines relatively long, reaching the maxilla, bearing well developed anterior processes. Sphenethmoid well ossified, extending anteriorly beyond the anterior edge of nasals. Cotylar facets of atlas narrowly separated. Transverse processes of posterior presacral vertebrae slightly shortened. Omosternum cartilaginous, elongate, with anterior end expanded. Inner metacarpal with a distinct distal flange at the medial margin of the bone. Terminal phalanges knobbed, not T–shaped. Tadpole with ventral and lateral skin transparent. Anterior and lateral papillae of oral disc protruding from the contour of the snout in dorsal view. Chromosome number 2n = 32.
 Etymology. The genus name derives from Chaltén, the name given by Tehuelche natives to the main mountain located south of Lago del Desierto, also known as Mount Fitz Roy, of 3406 m elevation.
description: Published as part of Basso, Néstor G., Úbeda, Carmen A., Bunge, María M. & Martinazzo, Liza B., 2011, A new genus of neobatrachian frog from southern Patagonian forests, Argentina and Chile, pp. 31-44 in Zootaxa 3002 on page 34, DOI: 10.5281/zenodo.202477
Entanglement negativity and topological order
Creators: name: Lee, Yirun Arthur
name: Vidal, Guifre
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We use the entanglement negativity, a measure of entanglement for mixed states, to probe the structure of entanglement in the ground state of a topologically ordered system. Through analytical calculations of the negativity in the ground state(s) of the toric code model, we explicitly show that the entanglement of a region $A$ and its complement $B$ is the sum of two types of contributions. The first type of contributions consists of \textit{boundary entanglement}, which we see to be insensitive to tracing out the interior of $A$ and $B$. It therefore entangles only degrees of freedom in $A$ and $B$ that are close to their common boundary. As it is well-known, each boundary contribution is proportional to the size of the relevant boundary separating $A$ and $B$ and it includes an additive, universal correction. The second contribution appears only when $A$ and $B$ are non-contractible regions (e.g. on a torus) and it consists of long-range entanglement, which we see to be destroyed when tracing out a non-contractible region in the interior of $A$ or $B$. Only the long-range contribution to the entanglement may depend on the specific ground state under consideration.
description: 14 pages, 5 figures (discussion enlarged) -- results closely related to C. Castelnovo, arXiv:1306.4990
Experimental study of magneto-inertially driven, differentially rotating plasma flows
Creators: name: Valenzuela Villaseca, Vicente
Publisher: name: Imperial College London
Year: 2022

description: This thesis presents experimental results from a novel laboratory platform to produce high-energy-density rotating plasmas implemented at the MAGPIE pulsed-power generator. The experiments are probed using a combination of self-emission imaging, laser interferometry and Thomson Scattering diagnostics. Two configurations of the experiment were implemented, demonstrating control of the amount of angular momentum in the flow. Rotating plasma flows are produced by the convergence of eight ablation flows generated from a cylindrical wire array Z pinch, which are azimuthally deflected by an external magnetic field. The ablation flows provide mass, angular momentum and confining ram pressure. The resulting plasma density structure is characterized by a higher density thin shell (e.g., with electron density $n_e = (5\pm 1)\times10^{17}$ cm$^{-3}$ in the initial experiments) surrounding a low density core (e.g., $n_e = (1.0\pm 0.2)\times10^{17}$ cm$^{-3}$), supported by the centrifugal barrier introduced by angular momentum. The results demonstrate the formation of a differentially rotating plasma flow. In the initial (low angular momentum experiments), the rotation velocity $u_\theta = 23.9 \pm 2.1$ km/s; whereas in the increased angular momentum experiments, $u_\theta = 39.0 \pm 2.9$ km/s. The plasma undergoes between 0.5 to 2 full rotations in the experimental time-frame, with the inner region completing more revolutions. It is also discovered that the rotation profile corresponds to a quasi-Keplerian stratification, meaning that it is expected to be hydrodynamically stable whilst being unstable under the magneto-rotational instability. However, no evidence of the instability was observed, probably due to the absence of out-of-plane magnetic fields.
Emergence of slow collective oscillations in neural networks with spike timing dependent plasticity
Creators: name: Mikkelsen, Kaare
name: Imparato, Alberto
name: Torcini, Alessandro
Publisher: name: arXiv
Year: 2013
Subjects: subject: Neurons and Cognition (q-bio.NC)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: The collective dynamics of excitatory pulse coupled neurons with spike timing dependent plasticity (STDP) is studied. The introduction of STDP induces persistent irregular oscillations between strongly and weakly synchronized states, reminiscent of brain activity during slow-wave sleep. We explain the oscillations by a mechanism, the Sisyphus Effect, caused by a continuous feedback between the synaptic adjustments and the coherence in the neural firing. Due to this effect, the synaptic weights have oscillating equilibrium values, and this prevents the system from relaxing into a stationary macroscopic state.
description: 8 pages, 6 figures to appear in Physical Review Letters plus additional material
Histone variants in archaea
Creators: name: Stevens, Kathryn
Publisher: name: Imperial College London
Year: 2022

description: Eukaryotic histone variants are involved in a wide range of processes and play a key role in altering nucleosome dynamics to shape the architecture of chromatin. The importance of individual variants has been studied extensively in many eukaryotes. In comparison, we know relatively little about histones in archaea. Despite sequence variation and evidence for potential functional differences between histone paralogs in the same species, whether archaea have histone variants, and therefore the potential for complex histone-based chromatin, has not been comprehensively explored. In this work, I apply structural and sequence-based approaches and present evidence that histone variants exist in archaea. In silico modelling suggests that, similarly to some eukaryotic variants, paralogs in archaea can be identified by unique structural properties. In particular, I describe one such variant, a “capstone”, that can drastically alter histone-based chromatin by limiting oligomerisation. Other paralogs have less extreme structural properties but are shared between species which separated hundreds of millions of years ago, on par with some eukaryotic histone variants. Although there are shared features between the two, histones in archaea have appear to have explored a different sequence space to eukaryotic histones, evolving separately and in parallel.
Percolation properties of growing networks under an Achlioptas process
Creators: name: Yi, Su Do
name: Jo, Woo Seong
name: Kim, Beom Jun
name: Son, Seung-Woo
Publisher: name: arXiv
Year: 2013
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: We study the percolation transition in growing networks under an Achlioptas process (AP). At each time step, a node is added in the network and, with the probability $δ$, a link is formed between two nodes chosen by an AP. We find that there occurs the percolation transition with varying $δ$ and the critical point $δ_c=0.5149(1)$ is determined from the power-law behavior of order parameter and the crossing of the fourth-order cumulant at the critical point, also confirmed by the movement of the peak positions of the second largest cluster size to the $δ_c$. Using the finite-size scaling analysis, we get $β/\barν=0.20(1)$ and $1/\barν=0.40(1)$, which implies $β\approx 1/2$ and $\barν \approx 5/2$. The Fisher exponent $τ= 2.24(1)$ for the cluster size distribution is obtained and shown to satisfy the hyperscaling relation.
description: 4 pages, 5 figures, 1 table, journal submitted
Area laws in a many-body localized state and its implications for topological order
Creators: name: Bauer, Bela
name: Nayak, Chetan
Publisher: name: arXiv
Year: 2013
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The question whether Anderson insulators can persist to finite-strength interactions - a scenario dubbed many-body localization - has recently received a great deal of interest. The origin of such a many-body localized phase has been described as localization in Fock space, a picture we examine numerically. We then formulate a precise sense in which a single energy eigenstate of a Hamiltonian can be adiabatically connected to a state of a non-interacting Anderson insulator. We call such a state a many-body localized state and define a many-body localized phase as one in which almost all states are many-body localized states. We explore the possible consequences of this; the most striking is an area law for the entanglement entropy of almost all excited states in a many-body localized phase. We present the results of numerical calculations for a one-dimensional system of spinless fermions. Our results are consistent with an area law and, by implication, many-body localization for almost all states and almost all regions for weak enough interactions and strong disorder. However, there are rare regions and rare states with much larger entanglement entropies. Furthermore, we study the implications that many-body localization may have for topological phases and self-correcting quantum memories. We find that there are scenarios in which many-body localization can help to stabilize topological order at non-zero energy density, and we propose potentially useful criteria to confirm these scenarios.
description: 18 pages, 10 figures. Minor updates
Focusing polychromatic light through strongly scattering media
Creators: name: Paudel, Hari P.
name: Stockbridge, Chris
name: Mertz, Jerome
name: Bifano, Thomas
Publisher: name: arXiv
Year: 2013
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We demonstrate feedback-optimized focusing of spatially coherent polychromatic light after transmission through strongly scattering media, and describe the relationship between optimized focus intensity and initial far-field speckle contrast. Optimization is performed using a MEMS spatial light modulator with camera-based or spectrometer-based feedback. We observe that the spectral bandwidth of the optimized focus depends on characteristics of the feedback signal. We interpret this dependence as a modification in the number of spectral modes transmitted by the sample, and introduce a simple model for polychromatic focus enhancement that is corroborated by experiment with calibrated samples.
title: MATURATION OF EQUINE PROXIMAL SESAMOID BONES IN THOROUGHBRED HORSES
Creators: name: Mangine, Angela Maria
Publisher: name: UK Libraries
Year: 2021
Subjects: subject: FOS: Veterinary science
valueUri: http://www.oecd.org/science/inno/38235147.pdf

description: Proximal sesamoid bone (PSB) injuries account for approximately 50% of all fatal catastrophic musculoskeletal injuries in Thoroughbred racehorses. In addition, PSB fractures are not uncommon in Thoroughbred foals and yearlings as a result of energetic or intense free exercise. The ability to interpret some PSB pathology assessments, however, is more difficult given the limited information published on the normal development and maturation of these paired sesamoid bones. In addition, the level of normal variation in PSB morphological and structural parameters within the Thoroughbred population as a function of age, body size, gender, and inter-animal variation are not well documented, complicating accurate assessments of PSB pathology.

These knowledge gaps were addressed through postmortem analyses of PSB anatomy from 36 horses representing an age range from birth to skeletal maturity. All study subjects were believed to represent normal appendicular skeletal structure for the Thoroughbred breed and were assessed using clinical computed tomography (cCT) evaluation (n=18 horses, 21 months to six years of age) and micro–computed tomography (μCT) bone morphometry evaluation (n=22 horses, birth to six years of age). Medial PSBs were found to be shorter and deeper with an increased bone mineral density compared to lateral PSBs. Trabecular separation and degree of anisotropy were also greater in medial than lateral PSBs. All of the measured μCT parameters changed with increasing age, clearly documenting a postnatal maturation process. Connectivity density and degree of anisotropy changed rapidly after birth, while the parameters of total volume, bone volume, bone volume fraction, trabecular number, and trabecular thickness changed at a slower rate. Importantly, however, all of these parameters approached a horizontal asymptote before 24 months of age. The only μCT parameter that continued to change beyond two years of age was trabecular separation. These findings greatly advance the understanding of postnatal development and maturation timelines of PSBs in Thoroughbred horses, as well as documenting structural differences between medial and lateral PSBs. The data also indicate that PSBs in Thoroughbred horses have reached skeletal maturity by two years of age, a time that corresponds with the onset of high speed exercise and racing competition. The results define normal structural and morphological characteristics of Thoroughbred PSBs, as well as a preliminary appreciation for the extent of inter-animal variation. This knowledge will provide an essential baseline for the assessment of equine PSB pathologies.
description: © 2021 Angela Maria Mangine
Europium nitride: A novel diluted magnetic semiconductor
Creators: name: Binh, Do Le
name: Ruck, B. J.
name: Natali, F.
name: Warring, H.
name: Trodahl, H. J.
name: Anton, E. -M.
name: Meyer, C.
name: Ranno, L.
name: Wilhelm, F.
name: Rogalev, A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Europium nitride is semiconducting and contains non-magnetic \3+, but sub-stoichiometric EuN has Eu in a mix of 2+ and 3+ charge states. We show that at \2+ ~concentrations near 15-20% EuN is ferromagnetic with a Curie temperature as high as 120 K. The \3+ ~polarization follows that of the \2+, confirming that the ferromagnetism is intrinsic to the EuN which is thus a novel diluted magnetic semiconductor. Transport measurements shed light on the likely exchange mechanisms.
description: 5 pages
Geometric visualization of self-propulsion in a complex medium
Creators: name: Hatton, Ross L.
name: Ding, Yang
name: Choset, Howie
name: Goldman, Daniel I.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Biological Physics (physics.bio-ph)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Combining geometric mechanics theory, laboratory robotic experiment and numerical simulation, we study the locomotion in granular media (GM) of the simplest non-inertial swimmer, the Purcell three-link swimmer. Using granular resistive force laws as inputs, the theory relates translation and rotation of the body to shape changes (movements of the links). This allows analysis, visualization, and prediction of effective movements that are verified by experiment. The geometric approach also facilitates comparison between swimming in GM and in viscous fluids.
description: 4 pages, 5 figures, published in Physical Review Letters 2013
Oye
Creators: name: (:Unav)
Publisher: name: Columbia University
Year: 2021
Subjects: Culturally relevant pedagogy
Early childhood education
Education, Bilingual
Educational equalization
Social conditions
Hispanic Americans--Economic conditions
Puerto Ricans

description: Shot in area near Orchard and Broad Street, Newark, NJ. Discussion of issues facing Puerto Ricans in Newark, especially early childhood education, housing, and urban blight
Spin effects in relativistic ionization with highly charged ions in super-strong laser fields
Creators: name: Klaiber, Michael
name: Yakaboylu, Enderalp
name: Müller, Carsten
name: Bauke, Heiko
name: Paulus, Gerhard G.
name: Hatsagortsyan, Karen Z.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Spin effects in above-threshold ionization of hydrogenlike highly charged ions in super-strong laser fields are investigated. Spin-resolved ionization rates in the tunneling regime are calculated by employing two versions of a relativistic Coulomb-corrected strong-field approximation (SFA). An intuitive simple-man model is developed which explains the derived scaling laws for spin-flip and spin-asymmetry effects. The intuitive model as well as our ab initio numerical simulations support the analytical results for the spin effects obtained in the dressed SFA where the impact of the laser field on the electron spin evolution in the bound state is taken into account. In contrast, the standard SFA is shown to fail in reproducing spin effects at ionization even at a qualitative level. The anticipated spin-effects are expected to be measurable with modern laser techniques combined with an ion storage facility.
description: 5 pages, 2 figures
The Murchison Widefield Array: solar science with the low frequency SKA Precursor
Creators: name: Tingay, S. J.
name: Oberoi, D.
name: Cairns, I.
name: Donea, A.
name: Duffin, R.
name: Arcus, W.
name: Bernardi, G.
name: Bowman, J. D.
name: Briggs, F.
name: Bunton, J. D.
name: Cappallo, R. J.
name: Corey, B. E.
name: Deshpande, A.
name: deSouza, L.
name: Emrich, D.
name: Gaensler, B. M.
name: Goeke, R.
name: Greenhill, L. J.
name: Hazelton, B. J.
name: Herne, D.
name: Hewitt, J. N.
name: Johnston-Hollitt, M.
name: Kaplan, D. L.
name: Kasper, J. C.
name: Kennewell, J. A.
name: Kincaid, B. B.
name: Koenig, R.
name: Kratzenberg, E.
name: Lonsdale, C. J.
name: Lynch, M. J.
name: McWhirter, S. R.
name: Mitchell, D. A.
name: Morales, M. F.
name: Morgan, E.
name: Ord, S. M.
name: Pathikulangara, J.
name: Prabu, T.
name: Remillard, R. A
name: Rogers, A. E. E.
name: Roshi, A.
name: Salah, J. E.
name: Sault, R. J.
name: Udaya-Shankar, N.
name: Srivani, K. S.
name: Stevens, J.
name: Subrahmanyan, R.
name: Waterson, M.
name: Wayth, R. B.
name: Webster, R. L.
name: Whitney, A. R.
name: Williams, A.
name: Williams, C. L.
name: Wyithe, J. S. B.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The Murchison Widefield Array is a low frequency (80 - 300 MHz) SKA Precursor, comprising 128 aperture array elements (known as tiles) distributed over an area of 3 km diameter. The MWA is located at the extraordinarily radio quiet Murchison Radioastronomy Observatory in the mid-west of Western Australia, the selected home for the Phase 1 and Phase 2 SKA low frequency arrays. The MWA science goals include: 1) detection of fluctuations in the brightness temperature of the diffuse redshifted 21 cm line of neutral hydrogen from the epoch of reionisation; 2) studies of Galactic and extragalactic processes based on deep, confusion-limited surveys of the full sky visible to the array; 3) time domain astrophysics through exploration of the variable radio sky; and 4) solar imaging and characterisation of the heliosphere and ionosphere via propagation effects on background radio source emission. This paper concentrates on the capabilities of the MWA for solar science and summarises some of the solar science results to date, in advance of the initial operation of the final instrument in 2013.
description: 5 pages, 1 figure
Nixon/Watergate/Energy Crisis panel
Creators: name: (:Unav)
Publisher: name: Columbia University
Year: 2021
Subjects: Bus drivers
Taxicab drivers
African Americans--Economic conditions
Local transit
Watergate Affair (1972-1974)
Power resources
Energy policy

description: Nixon, energy crisis, cab drivers, bus drivers; Speakers include John McGee, NJ bus driver: volunteer driver for Newark Senior Citizens Commission, bus driver for Transport of NJ, appeared in Black Federation's movie The Ride; John H. Foreman, taxi driver; two other unidentified taxi drivers
Van der Waals and Casimir interactions between two graphene sheets
Creators: name: Klimchitskaya, G. L.
name: Mostepanenko, V. M.
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: The thermal free energy and pressure of dispersion interaction between two graphene sheets described by the Dirac model are calculated using the Lifshitz formula with reflection coefficients expressed via the polarization tensor. The obtained results for a pristine graphene are found to be in agreement with computations using Coulomb coupling between density fluctuations. For a graphene with nonzero mass gap parameter a qualitatively different behavior for the free energy and pressure is obtained. The Lifshitz formula with reflection coefficients expressed via the polarization tensor is used as a test for different computational approaches proposed in the literature for modeling the response function and conductivity of graphene at both zero and nonzero temperature.
description: 14 pages, 5 figures, to appear in Phys. Rev. B
The kinematic signature of the inspiral phase of massive binary black holes
Creators: name: Meiron, Yohai
name: Laor, Ari
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Supermassive black holes are expected to pair as a result of galaxy mergers, and form a bound binary at parsec or sub-parsec scales. These scales are unresolved even in nearby galaxies, and thus detection of non-active black hole binaries must rely on stellar dynamics. Here we show that these systems could be indirectly detected through the trail that the black holes leave as they spiral inwards. We analyze two numerical simulations of inspiralling black holes (equal masses and 10:1 mass ratio) in the stellar environment of a galactic centre. We studied the effect of the binary on the structure of the stellar population, with particular emphasis on projected kinematics and directly measurable moments of the velocity distribution. We present those moments as high-resolution 2D maps. As shown in past scattering experiments, a torus of stars counter-rotating with respect to the black holes exists in scales ~ 5 to 10 times larger than the binary separation. While this is seen in the average velocity map in the unequal mass case, it is obscured by a more strongly co-rotating outer region in the equal mass case; however, the inner counter-rotation could still be detected by studying the higher moments of the velocity distribution. Additionally, the maps reveal a dip in velocity dispersion in the inner region, as well as more pronounced signatures in the higher distribution moments. These maps could serve as templates for integral field spectroscopy observations of nearby galactic centres. The discovery of such signatures may help census the population of supermassive black hole binaries and refine signal rate predictions for future space-based low frequency gravitational wave detectors.
description: Accepted for publication in MNRAS; 9 pages, 7 figures
Integration over homogenous spaces for classical Lie groups using iterated residues at infinity
Creators: name: Zielenkiewicz, Magdalena
Publisher: name: arXiv
Year: 2012
Subjects: subject: Algebraic Topology (math.AT)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14M15

description: Using the Berline-Vergne integration formula for equivariant cohomology for torus actions, we prove that integrals over Grassmannians (classical, Lagrangian or orthogonal ones) of characteristic classes of the tautological bundle, can be expressed as iterated residues at infinity of some holomorphic functions of several variables. The results obtained for these cases, can be expressed as special cases of one formula, involving the Weyl group action on the characters of the natural representation of the torus.
Probing exciton interaction with a spatially defined charge accumulation layer in the organic semiconductor Diindenoperylene
Creators: name: Hansen, N. H.
name: Wunderlich, C.
name: Topczak, A. K.
name: Pflaum, J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We present an investigation of the microscopic interplay between excitons and charge carriers by means of combined photoluminescence (PL) and charge carrier transport measurements on organic thin film transistors (OTFT). For this purpose, the prototypical organic semiconductor Diindenoperylene (DIP) was utilized as active material. The OTFT accumulation layer provides a spatially defined interaction zone for charges and photo-generated excitons leading to a PL intensity reduction of up to 4.5%. This effect correlates with the accumulated hole carrier density and provides a lower estimate of about 1.3E-10 cm3/s for the cross-section of non-radiative exciton-hole processes. It is rationalized that these processes are preferentially mediated by trapped holes.
The Mass Distribution of Subgiant Planet Hosts
Creators: name: Lloyd, James P.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: High mass stars are hostile to Doppler measurements due to rotation and activity on the main-sequence, so radial velocity searches for planets around massive stars have relied on evolved stars. A large number of planets have been found around evolved stars with M>1.5 Msun. To test the robustness of mass determinations, Lloyd (2011) compared mass distributions of planet hosting subgiants with distributions from integrating isochrones and concluded it is unlikely the subgiant planet hosts are this massive, but rather the mass inferences are systematically in error. The conclusions of Lloyd (2011) have been called in to question by Johnson, Morton & Wright (2013), who show TRILEGAL-based mass distributions disagree with the mass distributions in Lloyd (2011), which they attribute to Malmquist bias. Johnson, Morton & Wright (2013) argue that the very small spectroscopic observational uncertainties favor high masses, and there are a large number of high mass sub giants in RV surveys. However, in this letter, it is shown that Malmquist bias does not impact the mass distributions, but the mass distribution is sensitive to Galaxy model. The relationship needed to reconcile the subgiant planet host masses with any model of the Galactic stellar population is implausible, and the conclusion of Lloyd (2011) that spectroscopic mass determinations of subgiants are likely to have been overestimated is robust.
description: Accepted for publication in ApJL
New Galactic supernova remnants discovered with IPHAS
Creators: name: Sabin, L.
name: Parker, Q. A.
name: Contreras, M. E.
name: Olguín, L.
name: Frew, D. J.
name: Stupar, M.
name: Vázquez, R.
name: Wright, N. J.
name: Corradi, R. L. M
name: Morris, R. A. H
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: As part of a systematic search programme of a 10-degree wide strip of the Northern Galactic plane we present preliminary evidence for the discovery of four (and possibly five) new supernova remnants (SNRs). The pilot search area covered the 19-20 hour right ascension zone sampling from +20 to +55 degrees in declination using binned mosaic images from the INT Photometric H-alpha Survey (IPHAS). The optical identification of the candidate SNRs was based mainly on their filamentary and arc-like emission morphologies, their apparently coherent, even if fractured structure and clear disconnection from any diffuse neighbouring HII region type nebulosity. Follow-up optical spectroscopy was undertaken, sampling carefully across prominent features of these faint sources. The resulting spectra revealed typical emission line ratios for shock excited nebulae which are characteristic of SNRs, which, along with the latest diagnostic diagrams, strongly support the likely SNR nature of these sources: G038.7-1.3 (IPHASX J190640.5+042819); G067.6+0.9 (IPHASX J195744.9+305306); G066.0-0.0 (IPHASX J195749.2+290259) and G065.8-0.5 (IPHASX J195920.4+283740). A fifth possible younger, higher density nebula SNR candidate, G067.8+0.5 (IPHASX J200002.4+305035) was discovered about 5 arcmins to the west of IPHASX J195744.9+305306, and warrants further study. A multi-wavelength cross-check from available archived data in the regions of these candidates was also performed with a focus on possible radio counterparts.
description: 14 pages, 8 figures. Accepted for publication in MNRAS
Land Tenure Dynamics
Creators: name: Hottel, J. Bruce
name: Martin, J. Rod
name: Hottel, J. Bruce
name: Martin, J. Rod
Publisher: name: Unknown
Year: 1972
Subjects: Agricultural Finance
Farm Management
Labor and Human Capital
Land Economics/Use
Research Methods/ Statistical Methods

description: Excerpts from the report: It is the contention of the authors that the pattern of land tenure associated with resources used by farm operators is primarily a function of (1) the firm growth environment present in the agricultural industry and (2) the view that farm operators and/or land investors hold with regard to the potential short- and longrun capital accumulation and investments through the utilization of borrowed and owned funds. The purpose of this paper is to demonstrate that firm growth analyses provides a relevant framework for examining this hypothesis. Three basic suppositions with regard to this hypothesis are (a) capital is more limited to the farm operator for investment in ownership than for annual operating purposes, (b) cash capital accumulation is greater in the shortrun for capital used for rented land resources than for ownership investment purposes, and (c) total capital accumulation is greater in the longrun for land ownership investment purposes than for operating capital used for rented land resources.
Large N anomalous dimensions for large operators in Leigh-Strassler deformed SYM
Creators: name: Koch, Robert de Mello
name: Murugan, Jeff
name: Nokwara, Nkululeko
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the large N anomalous dimensions of operators in a Leigh-Strassler deformation of N=4 super Yang-Mills theory. The operators that we study have a bare dimension of order N (so that the large N limit is not captured by planar diagrams) and are AdS/CFT dual to giant gravitons. The diagonalization of the dilatation operator factorizes into two problems. One of these problems is solved using a double coset ansatz. The second problem is equivalent to a set of decoupled harmonic oscillators.
description: 1+15 pages
title: Konflikt i współpraca. Stosowalność zasady upośledzenia w analizie ludzkich rytuałów
title: Conflict and Cooperation. Applicability of the Handicap Principle in the Analysis of Humena Rituals.
title: Konflikt i współpraca. Stosowalność zasady upośledzenia w analizie ludzkich rytuałów
title: Conflict and Cooperation. Applicability of the Handicap Principle in the Analysis of Humena Rituals.
title: Konflikt i współpraca. Stosowalność zasady upośledzenia w analizie ludzkich rytuałów
title: Conflict and Cooperation. Applicability of the Handicap Principle in the Analysis of Humena Rituals.
title: Konflikt i współpraca. Stosowalność zasady upośledzenia w analizie ludzkich rytuałów
title: Conflict and Cooperation. Applicability of the Handicap Principle in the Analysis of Humena Rituals.
title: Konflikt i współpraca. Stosowalność zasady upośledzenia w analizie ludzkich rytuałów
title: Conflict and Cooperation. Applicability of the Handicap Principle in the Analysis of Humena Rituals.
Creators: name: Bohuszewicz, Jakub
Publisher: name: Uniwersytet Wrocławski. Pracownia Badań nad Tradycją Oralną
Year: 2017

description: zasada upośledzenia
description: ewolucja kulturowa
description: komunikacja społeczna
description: kosztowne sygnały
description: teoria rytuału
description: The aim of this paper is to determine the explanatory power of Amotz Zahavi’s ‘handicap theory’ in describing culturally distributed rituals. Zahavi’s starting point is the difficulty noticed by Charles Dar win: the differences between two sexes have been acquired in some instances at the cost not only of convenience but of exposure to actual danger. The costly features of males, which are responsible for these differences, should have been eliminated a long time ago by the process of evolution. But it has not happened– why? In seeking an answer to this question, Zahavi posited that these features function as signals which, in handicapping the sender, are too costly to dissimulate, and that the similar principle directs the development of human ritualistic behaviours. How far is this assumption sound, when taking into consideration the argument of some evolutionists and anthropo logists, that human culture makes profound changes in the nature of evolving systems?
Parameter space metric for 3.5 post-Newtonian gravitational-waves from compact binary inspirals
Creators: name: Keppel, Drew
name: Lundgren, Andrew P.
name: Owen, Benjamin J.
name: Zhu, Hanyuan
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences

description: We derive the metric on the parameter space of 3.5 post-Newtonian (3.5PN) stationary phase compact binary inspiral waveforms for a single detector, neglecting spin, eccentricity, and finite-body effects. We demonstrate that this leads to better template placement than the current practice of using the 2PN metric to place 3.5PN templates: The recovered event rate is improved by about 10% at a cost of nearly doubling the number of templates. The cross-correlations between mass parameters are also more accurate, which will result in better coincidence tests.
description: 10 pages, 7 figures
Towards the fate of natural composite Higgs model through single $t^\prime$ search at the 8 TeV LHC
Creators: name: Li, Jinmian
name: Liu, Da
name: Shu, Jing
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We analyze the observational potential of single $t'$ production in both the $t^\prime \rightarrow bW$ and $t^\prime \rightarrow th$ decay channels at 8 TeV LHC using an integrated luminosity of 25 $\text{fb}^{-1}$. Our analysis is based on a simplified model with minimal coset $SO(5)/SO(4)$ in which the $t'$ is a singlet of the unbroken SO(4). The single $t'$ production, as a consequence of electroweak symmetry breaking, is less kinematically suppressed, associated with a light forward jet and has boosted decay products at the 8 TeV LHC. Therefore it provides the most promising channel in searching for a heavy $t'$. We have exploited the above kinematical features and used the jet substructure method to reconstruct the boosted Higgs in $th$ decay channel. It is shown that a strong constraint on the $t^\prime bW$ coupling ($g_{t^\prime bW}/g_{tbW,SM} < 0.2 \sim 0.3$) at the 95% C. L. can be obtained for $m_{t'} \subset (700, 1000)$ GeV.
description: 22 pages, 8 figures, 5 tables, refs added in v2
Vlasov versus reduced kinetic theories for helically symmetric equilibria
Creators: name: Tasso, H.
name: Throumoulopoulos, G. N.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: A new constant of motion for helically symmetric equilibria in the vicinity of the magnetic axis is obtained in the framework of Vlasov theory. In view of this constant of motion the Vlasov theory is compared with drift kinetic and gyrokinetic theories near axis. It turns out that as in the case of axisymmetric equilibria [H. Tasso and G. N. Throumoulopoulos, Phys. Plasmas 18, 064507 (2011)] the Vlasov current density thereon can differ appreciably from the drift kinetic and gyrokinetic current densities. This indicates some limitation on the implications of reduced kinetic theories, in particular as concerns the physics of energetic particles in the central region of magnetically confined plasmas.
description: 14 pages. arXiv admin note: substantial text overlap with arXiv:1104.0427
Blind Adaptive Interference Suppression Based on Set-Membership Constrained Constant-Modulus Algorithms with Time-Varying Bounds
Creators: name: de Lamare, Rodrigo C.
name: Diniz, Paulo S. R.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: This work presents blind constrained constant modulus (CCM) adaptive algorithms based on the set-membership filtering (SMF) concept and incorporates dynamic bounds {for interference suppression} applications. We develop stochastic gradient and recursive least squares type algorithms based on the CCM design criterion in accordance with the specifications of the SMF concept. We also propose a blind framework that includes channel and amplitude estimators that take into account parameter estimation dependency, multiple access interference (MAI) and inter-symbol interference (ISI) to address the important issue of bound specification in multiuser communications. A convergence and tracking analysis of the proposed algorithms is carried out along with the development of analytical expressions to predict their performance. Simulations for a number of scenarios of interest with a DS-CDMA system show that the proposed algorithms outperform previously reported techniques with a smaller number of parameter updates and a reduced risk of overbounding or underbounding.
description: 10 figures, IEEE Transactions on Signal Processing, 2012