cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Response of interior spruce to fertilization in the interior of British Columbia
Creators: name: Swift, Kathie
Publisher: name: University of British Columbia
Year: 2010

description: In 1987, a research project, conducted in the interior of British Columbia, was undertaken in order to obtain preliminary fertilization response data for three interior species. In 1988, as part of this contract, 12 screening trials were established in young interior spruce stands in the north-central interior of B. C. using factorial combinations of nitrogen and "complete" mix fertilizer. Initial assessment of the unfertilized foliage obtained from the 12 installations indicated that all stands exibited low nitrogen and potentially low sulphur levels. After fertilization, the effects of the treatments were measured by needle weight response, nutrient concentration, and subsequent nutrient content response. In all 12 installations the largest needle weight response occured when the nitrogen and the "complete" mix fertilizers were combined.. In the treatments where nitrogen was applied alone, no significant change in needle size was recorded. Nutritionally, nitrogen fertilization resulted in large increases in nitrogen concentration, indicating this element was limiting. As well, nitrogen fertilization also produced large decreases in K, S, and S04-S concentrations. Nitrogen-only fertilization also caused large elevations in the N/S ratios to occur. This elevation in N/S ratios and the subsequent decreases in S and S04-S concentrations seem to indicate that nitrogen-only fertilization has a negative impact on the sulphur nutrition of interior spruce. The addition of the "complete" mix fertilizer was, in most cases, successful in returning the decreased nutrient concentration levels of K, S, and S04 and the elevated N/S ratios back to their original unfertilized status. From these results it appears that nitrogen fertilization of interior spruce should only be considered if it is accompanied by a mixture of other nutrients; the most important component being sulphur.
Cluster structure of a low-energy resonance in tetraneutron
Creators: name: Lashko, Yuliya
name: Filippov, Gennady
Publisher: name: arXiv
Year: 2006
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We theoretically investigate the possibility for a tetraneutron to exist as a low-energy resonance state. We explore a microscopic model based on the assumption that the tetraneutron can be treated as a compound system where $^3$n+n and $^2$n+$^2$n coupled cluster configurations coexist. The influence of the Pauli principle on the kinetic energy of the relative motion of the neutron clusters is shown to result in their attraction. The strength of such attraction is high enough to ensure the existence of a low-energy resonance in the tetraneutron, provided that the oscillator length is large enough.
description: 5 pages, 7 figures, submitted to PRC
МЕВАЛИ БОҒЛАРДА ҚАЛҚОНДОРЛАР ҚАРШИ КИМЁВИЙ ПРЕПАРАТЛАРНИНГ БИОЛОГИК САМАРАДОРЛИГИ
Creators: name: Н. Иргашева
name: Ш. А. Маҳмудова
name: А. М. Худойқулов
Publisher: name: Academic research in educational sciences
Year: 2021
Subjects: Олма
гилос
олхўри
шафтоли
турон сохта қалқондори
бинафша рангли қалқондор
вергулсимон қалқондорлар
вариантлар
биологик самарадорлик.

description: Ушбу мақолада мевали боғлардаги қалқондорларнинг зарари, ва уларга қарши кимѐвий препаратлардан Адмирал 10% эм.к. ва Фуфанон 57% эм.к. препаратларининг биологик самарадорлигини аниқлаш мақсадида, Cамарқанд вилояти Самарқанд тумани “Оҳаклик олтин боғлари меваси” МЧЖ га қарашли интинсев мевали боғларида олиб борилган. Олинган натижалар асосида хулоса ва таклифлар берилган
One Semantic Parser to Parse Them All: Sequence to Sequence Multi-Task Learning on Semantic Parsing Datasets
Creators: name: Damonte, Marco
name: Monti, Emilio
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences

description: Semantic parsers map natural language utterances to meaning representations. The lack of a single standard for meaning representations led to the creation of a plethora of semantic parsing datasets. To unify different datasets and train a single model for them, we investigate the use of Multi-Task Learning (MTL) architectures. We experiment with five datasets (Geoquery, NLMaps, TOP, Overnight, AMR). We find that an MTL architecture that shares the entire network across datasets yields competitive or better parsing accuracies than the single-task baselines, while reducing the total number of parameters by 68%. We further provide evidence that MTL has also better compositional generalization than single-task models. We also present a comparison of task sampling methods and propose a competitive alternative to widespread proportional sampling strategies.
Superconducting quantum phase transitions tuned by magnetic impurity and magnetic field in ultrathin a-Pb films
Creators: name: Parker, J. S.
name: Read, D. E.
name: Kumar, A.
name: Xiong, P.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Superconducting quantum phase transitions tuned by disorder (d), paramagnetic impurity (MI) and perpendicular magnetic field (B) have been studied in homogeneously disordered ultrathin a-Pb films. The MI-tuned transition is characterized by progressive suppression of the critical temperature to zero and a continuous transition to a weakly insulating normal state with increasing MI density. In all important aspects, the d-tuned transition closely resembles the MI-tuned transition and both appear to be fermionic in nature. The B-tuned transition is qualitatively different and probably bosonic. In the critical region it exhibits transport behavior that suggests a B-induced mesoscale phase separation and presence of Cooper pairing in the insulating state.
description: 17 pages, 4 figures
The Sum Theorem for Linear Maximal Monotone Operators
Creators: name: Voisei, M. D.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 47H05

description: The goal of this article is to give a positive answer to Rockafellar's maximality of the sum conjecture in the linear multi-valued operator case.
description: 3 pages
ИСЛОМ ОЛАМИДА ИМОМИ АЪЗАМ АБУ ҲАНИФАНИНГ МАЪНАВИЙ-АХЛОҚИЙ МЕРОСИНИНГ ТУТГАН ЎРНИ
Creators: name: Динара Улуғбековна Атажонова
Publisher: name: Academic research in educational sciences
Year: 2021
Subjects: дин
исломий дунѐқараш
аҳли сунна
суннат амаллари
имон
эътиқод
маънавий-ахлоқий хислатлар
мазҳаб

description: Мазкур мақолада Ислом оламида Имоми Аъзам Абу Ҳанифанинг маънавий-ахлоқий меросининг тутган ўрни тўғрисидаги қарашлар баѐн қилинган. Тадқиқотчиларнинг мавзуга ѐндашувлари тизимли равишда таҳлил қилинди. Бундан ташқари, муаллифнинг илмий хулосалари берилган
Spatial Mapping of Powder Layer Density for Metal Additive Manufacturing via X-ray Microscopy
Creators: name: Penny, Ryan W.
name: Praegla, Patrick M.
name: Ochsenius, Marvin
name: Oropeza, Daniel
name: Meier, Christoph
name: Wall, Wolfgang A.
name: Hart, A. John
Publisher: name: arXiv
Year: 2021
Subjects: subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: Uniform powder spreading is a requisite for creating consistent, high-quality components via powder bed additive manufacturing (AM), wherein layer density and uniformity are complex functions of powder characteristics, spreading kinematics, and mechanical boundary conditions. High spatial variation in particle packing density, driven by the stochastic nature of the spreading process, impedes optical interrogation of these layer attributes. Thus, we present transmission X-ray imaging as a method for directly mapping the effective depth of powder layers at process-relevant scale and resolution. Specifically, we study layers of nominal 50-250 micrometer thickness, created by spreading a selection of commercially obtained Ti-6Al-4V, 316 SS, and Al-10Si-Mg powders into precision-depth templates. We find that powder layer packing fraction may be predicted from a combination of the relative thickness of the layer as compared to mean particle size, and flowability assessed by macroscale powder angle of repose. Power spectral density analysis is introduced as a tool for quantification of defect severity as a function of morphology, and enables separate consideration of layer uniformity and sparsity. Finally, spreading is studied using multi-layer templates, providing insight into how particles interact with both previously deposited material and abrupt changes in boundary condition. Experimental results are additionally compared to a purpose-built discrete element method (DEM) powder spreading simulation framework, clarifying the competing role of adhesive and gravitational forces in layer uniformity and density, as well as particle motion within the powder bed during spreading.
A Schelling Extended Model in Networks -- Characterization of Ghettos in Washington D.C
Creators: name: Ortega, Diego
name: Korutcheva, Elka
Publisher: name: arXiv
Year: 2022
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences
subject: 91D10

description: Segregation affects millions of urban dwellers. The main expression of this reality is the creation of ghettos which are city parts characterized by a combination of features: low income, poor cultural level... Segregation models have been usually defined over regular lattices. However, in recent years, the focus has shifted from these unrealistic frameworks to other environments defined via geographic information systems (GIS) or networks. Nevertheless, each one of them has its drawbacks: GIS demands high-resolution data, that are not always available, and networks tend to have limited real-world applications. Our work tries to fill the gap between them. First, we use some basic GIS information to define the network, and then, run an extended Schelling model on it. As a result, we obtain the location of ghettos. After that, we analyze which parts of the city are segregated, via spatial analysis and machine learning and compare our results. For the case study of Washington D.C., we obtain an $80\%$ accuracy.
description: This is a preprint of a paper whose final and definite form is published Open Access in 'Axioms'. 13 Pages, 6 figures
ТРАНСФОРМАЦИОННЫЕ ПРОЦЕССЫ В БАНКОВСКОЙ СИСТЕМЕ РЕСПУБЛИКИ УЗБЕКИСТАН
Creators: name: Наргиза Исмаиловна Хаитбаева
name: Жасур Бахром Угли Гаипов
Publisher: name: Academic research in educational sciences
Year: 2021
Subjects: трансформация
банки
финансовая стабильность
бизнеспроцессы

description: В данной статье рассматривается ряд вопросов, связанных с трансформацией банковской деятельности и бизнес–процессов в банковской системе республики Узбекистан. Определены меры, направленные на повышение эффективности деятельности, коммерциализацию и обеспечению клиентоориентированности государственных банков
Integral Grothendieck-Riemann-Roch theorem
Creators: name: Pappas, G.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics

description: We show that, in characteristic zero, the obvious integral version of the Grothendieck-Riemann-Roch formula obtained by clearing the denominators of the Todd and Chern characters is true (without having to divide the Chow groups by their torsion subgroups). The proof introduces an alternative to Grothendieck's strategy: we use resolution of singularities and the weak factorization theorem for birational maps.
description: 24 pages
Diameter increment models for the mixed swamp forests of Sarawak
Creators: name: Chai, Francis
Publisher: name: University of British Columbia
Year: 2010

description: Information on the growth and yield of Mixed Swamp Forests in Sarawak is inadequate. Tree diameter increment models were built as an initial effort towards developing a growth and yield modelling system for forests in Sarawak. First, the level of modelling for better predictions of diameter increment of commercial trees was investigated. The three levels of modelling were: (1) developing a single equation for all commercial species, (2) a separate equation for each of two groups, (3) a separate equation for each individual species. Second, linear and nonlinear models for seven important commercial species were developed. Diameter increment was modelled as a function of both tree and stand predictor variables. Only one nonlinear function, based on theoretical concepts, was attempted. Third, the usefulness of crown position and previous diameter growth for predicting current diameter growth was examined. Several objective measures such as mean bias, mean squared bias, and mean absolute deviation were calculated from validation data to indicate accurracy of predictions. Modelling at the individual species level resulted in better predictions than at the single group or two group level. The linear weighted models tested as better predictors than the nonlinear model. Previous diameter growth, in the absence of better predictor variables, was found to be more useful than crown position for predicting current diameter growth.
Quantum Electrodynamics on Noncommutative Spacetime
Creators: name: Calmet, Xavier
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We propose a new method to quantize gauge theories formulated on a canonical noncommutative spacetime with fields and gauge transformations taken in the enveloping algebra. We show that the theory is renormalizable at one loop and compute the beta function and show that the spin dependent contribution to the anomalous magnetic moment of the fermion at one loop has the same value as in the commutative quantum electrodynamics case.
description: published version
Wick's theorem for q-deformed boson operators
Creators: name: Mansour, Toufik
name: Schork, Matthias
name: Severini, Simone
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In this paper combinatorial aspects of normal ordering arbitrary words in the creation and annihilation operators of the q-deformed boson are discussed. In particular, it is shown how by introducing appropriate q-weights for the associated ``Feynman diagrams'' the normally ordered form of a general expression in the creation and annihilation operators can be written as a sum over all q-weighted Feynman diagrams, representing Wick's theorem in the present context.
description: 9 pages
Zerconidae Canestrini 1891
Creators: name: Urhan, Raşit
name: Duran, Elif Hilal
Publisher: name: Zenodo
Year: 2019
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Mesostigmata
Zerconidae

description: Family Zerconidae Canestrini, 1891  Zerconidae Canestrini, 1891: 722.
description: Published as part of Urhan, Raşit & Duran, Elif Hilal, 2019, Zerconid mites (Acari, Zerconidae) in Inner Aegean Region, with a new record for the Turkish fauna, pp. 323-336 in Zootaxa 4568 (2) on page 324, DOI: 10.11646/zootaxa.4568.2.7, http://zenodo.org/record/2599502
[Documents relating to Sawyer's Nomlaki fieldwork]
Creators: name: Sawyer, Jesse O.
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2015
Subjects: subject: nol
subject: Nomlaki language

description: Documentation relating to Sawyer's fieldwork: notes on Nomlaki vocabulary and phonology. Includes a letter to Victor Golla dated 1972 January 6 and Language Archives data sheet for a recording made with Sylvester Simmons in 1975 January.
TimeLens: Event-based Video Frame Interpolation
Creators: name: Tulyakov, Stepan
name: Gehrig, Daniel
name: Georgoulis, Stamatios
name: Erbach, Julius
name: Gehrig, Mathias
name: Li, Yuanyou
name: Scaramuzza, Davide
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: State-of-the-art frame interpolation methods generate intermediate frames by inferring object motions in the image from consecutive key-frames. In the absence of additional information, first-order approximations, i.e. optical flow, must be used, but this choice restricts the types of motions that can be modeled, leading to errors in highly dynamic scenarios. Event cameras are novel sensors that address this limitation by providing auxiliary visual information in the blind-time between frames. They asynchronously measure per-pixel brightness changes and do this with high temporal resolution and low latency. Event-based frame interpolation methods typically adopt a synthesis-based approach, where predicted frame residuals are directly applied to the key-frames. However, while these approaches can capture non-linear motions they suffer from ghosting and perform poorly in low-texture regions with few events. Thus, synthesis-based and flow-based approaches are complementary. In this work, we introduce Time Lens, a novel indicates equal contribution method that leverages the advantages of both. We extensively evaluate our method on three synthetic and two real benchmarks where we show an up to 5.21 dB improvement in terms of PSNR over state-of-the-art frame-based and event-based methods. Finally, we release a new large-scale dataset in highly dynamic scenarios, aimed at pushing the limits of existing methods.
Parity violation and the nature of charges
Creators: name: Desplanques, B.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The origin of parity violation in physics is still unknown. At the present time, it is introduced in the theory by requiring that the SU(2) subgroup entering the description of interactions involves the left components. In the present contribution, one elaborates upon a suggestion made by Landau that particles and antiparticles could be like "stereo-isomeric" molecules, which would naturally provides parity violation. Particles and antiparticles could thus be combinations of the parity doublets associated with a chiral symmetry realized in the Wigner-Weyl mode. Consequences of such a description and the possible problems it could raise are examined.
description: 3 pages, contribution to the 3rd international workshop: "From parity violation to hadronic structure and more ..." (PAVI06), to appear in the proceedings (EPJA)
First-principles characterization of the magnetic properties of Cu$_2$(OH)$_3$Br
Creators: name: Gautreau, Dominique M.
name: Saha, Amartyajyoti
name: Birol, Turan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Low dimensional spin-1/2 transition metal oxides and oxyhalides continue to be at the forefront of research investigating nonclassical phases such as quantum spin liquids. In this study, we examine the magnetic properties of the oxyhalide $\text{Cu}_2\text{(OH)}_3\text{Br}$ in the botallackite structure using first-principles density functional theory, linear spin-wave theory, and exact diagonalization calculations. This quasi-2D system consists of $\text{Cu}^{2+}$ $\mathrm{S} = 1/2$ moments arranged on a distorted triangular lattice. Our exact diagonalization calculations, which rely on a first-principles-based magnetic model, generate spectral functions consistent with inelastic neutron scattering (INS) data. By performing computational experiments to disentangle the chemical and steric effects of the halide ions, we find that the dominant effect of the halogen ions is steric in the $\text{Cu}_2\text{(OH)}_3\text{X}$ series of compounds.
Evolution of Neutrino Mass-Mixing Parameters in Matter with Non-Standard Interactions
Creators: name: Agarwalla, Sanjib Kumar
name: Das, Sudipta
name: Masud, Mehedi
name: Swain, Pragyanprasu
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We explore the role of matter effect in the evolution of neutrino oscillation parameters in the presence of lepton-flavor-conserving and lepton-flavor-violating neutral-current non-standard interactions (NSI) of the neutrino. We derive simple approximate analytical expressions showing the evolution/running of mass-mixing parameters in matter with energy in the presence of standard interactions (SI) and SI+NSI (considering both positive and negative values of real NSI parameters). We observe that only the NSI parameters in the (2,3) block, namely $\varepsilon_{μτ}$ and $(γ- β) \equiv (\varepsilon_{ττ} - \varepsilon_{μμ})$ affect the running of $θ_{23}$. Though all the NSI parameters influence the evolution of $θ_{13}$, $\varepsilon_{eμ}$ and $\varepsilon_{eτ}$ show a stronger impact at the energies relevant for DUNE. $θ_{12}$ quickly approaches to $\sim$ $90^{\circ}$ with increasing energy in both SI and SI+NSI cases. The change in $Δm^2_{21,m}$ is quite significant as compared to $Δm^2_{31,m}$ both in SI and SI+NSI frameworks. Flipping the signs of the NSI parameters alters the way in which mass-mixing parameters run with energy. We demonstrate the utility of our approach in addressing several important features related to neutrino oscillation such as: a) unraveling interesting degeneracies between $θ_{23}$ and NSI parameters, b) estimating the resonance energy in presence of NSI when $θ_{13}$ in matter becomes maximal, c) figuring out the required baselines and energies to have maximal matter effect in $ν_μ$ $\rightarrow$ $ν_{e}$ transition in the presence of different NSI parameters, and d) studying the impact of NSI parameters $\varepsilon_{μτ}$ and $(γ- β)$ on the $ν_μ \to ν_μ$ survival probability.
description: 37 pages, 13 figures, 2 tables. Comments are welcome
[Halpern Southeastern Pomo texts]
Creators: name: Moshinsky, Julius
name: Salvador, Clifford
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2015
Subjects: subject: pom
subject: Southeastern Pomo language

description: Typed and handwritten copies of texts collected by Halpern with handwritten annotation; digital scans in Moshinsky.003.
Understanding X-ray and optical selection of galaxy clusters: A comparison of the XXL and CAMIRA cluster catalogues obtained in the common XXL-HSC SSP area
Creators: name: Willis, J. P.
name: Oguri, M.
name: Ramos-Ceja, M. E.
name: Gastaldello, F.
name: Sereno, M.
name: Adami, C.
name: Alis, S.
name: Altieri, B.
name: Chiappetti, L.
name: Corasaniti, P. S.
name: Eckert, D.
name: Ettori, S.
name: Garrel, C.
name: Giles, P.
name: Lefevre, J.
name: Faccioli, L.
name: Fotopoulou, S.
name: Hamabata, A.
name: Koulouridis, E.
name: Lieu, M.
name: Lin, Y. -T.
name: Maughan, B.
name: Nishizawa, A. J.
name: Okabe, T.
name: Okabe, N.
name: Pacaud, F.
name: Paltani, S.
name: Pierre, M.
name: Plionis, M.
name: Poggianti, B.
name: Pompei, E.
name: Sadibekova, T.
name: Umetsu, K.
name: Valageas, P.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Large samples of galaxy clusters provide knowledge of both astrophysics in the most massive virialised environments and the properties of the cosmological model that defines our Universe. However, an important issue that affects the interpretation of galaxy cluster samples is the role played by the selection waveband and the potential for this to introduce a bias in the physical properties of clusters thus selected. We aim to investigate waveband-dependent selection effects in the identification of galaxy clusters by comparing the X-ray Multi-Mirror (XMM) Ultimate Extra-galactic Survey (XXL) and Subaru Hyper Suprime-Cam (HSC) CAMIRA cluster samples identified from a common 22.6 deg2 sky area. We compare 150 XXL and 270 CAMIRA clusters in a common parameter space defined by X-ray aperture brightness and optical richness. We find that 71/150 XXL clusters are matched to the location of a CAMIRA cluster, the majority of which (67/71) display richness values N>15 that exceed the CAMIRA catalogue richness threshold. We find that 67/270 CAMIRA clusters are matched to the location of an XXL cluster (defined within XXL as an extended X-ray source). Of the unmatched CAMIRA clusters, the majority display low X-ray fluxes consistent with the lack of an XXL counterpart. However, a significant fraction (64/107) CAMIRA clusters that display high X-ray fluxes are not asociated with an extended source in the XXL catalogue. We demonstrate that this disparity arises from a variety of effects including the morphological criteria employed to identify X-ray clusters and the properties of the XMM PSF.
description: 15 pages, 14 figures, MNRAS accepted
Theoretical uncertainties on quasielastic charged-current neutrino-nucleus cross sections
Creators: name: Valverde, M.
name: Amaro, J. E.
name: Nieves, J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We estimate the theoretical uncertainties of the model developed in Phys. Rev. C70 055503 for inclusive quasielastic charged-current neutrino-nucleus reactions at intermediate energies. Besides we quantify the deviations of the predictions of this many body framework from those obtained within a simple Fermi gas model. An special attention has been paid to the ratio σ(μ)/σ(e) of interest for experiments on atmospheric neutrinos. We show that uncertainties affecting this ratio are likely smaller than 5%
description: 10 pages, 6 figures. Few errors corrected. Accepted in Physics Letters B
Energy Thresholds of Stability of Three-Particle Systems
Creators: name: Simenog, I. V.
name: Bidasyuk, Yu. M.
name: Grinyuk, B. E.
name: Kuzmenko, M. V.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We have studied the general properties of the energy thresholds of stability for a three-particle system with short-range interaction. A wide region of the interaction constants and various ratios of the masses of particles are considered. The specific effects characteristic of the near-threshold stationary energy levels of three particles are revealed. The asymptotic estimates are obtained for the thresholds at some limiting cases, and the high-precision variational calculations of the thresholds for various values of the interaction constants and the masses of particles are carried out.
description: 27 pages, 6 PostScript figures, RevTeX4
Drivers of Entrepreneurship and Small Businesses: Project overview and database design
Creators: name: Bennett, Robert
name: Smith, Harry
name: Van Lieshout, Carry
name: Newton, Gill
Publisher: name: Apollo - University of Cambridge Repository
Year: 2017
Subjects: Entrepreneurship
Employers
Self-employment
Small businesses
Census

description: The census 1851-1911 provides a resource of information on employers and small firms that allows 200,000 – 2m individual entrepreneurs per year to be identified and the population of businesses to be estimated. This information has not been previous systematically available or researched. This paper outlines how information can be extracted from the population census, the way in which gaps and truncations in the I-CeM electronic records of the census of businesses can be overcome, and how the data can be enriched. The paper outlines how entrepreneurship is defined from the census and other records, how entrepreneurship rates can be calculated, and how database has been created that is as complete and consistent as possible to be deposited at UKDA.
The Liquid Blister Test
Creators: name: Chopin, J.
name: Vella, D.
name: Boudaoud, A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We consider a thin elastic sheet adhering to a stiff substrate by means of the surface tension of a thin liquid layer. Debonding is initiated by imposing a vertical displacement at the centre of the sheet and leads to the formation of a delaminated region, or `blister'. This experiment reveals that the perimeter of the blister takes one of three different forms depending on the vertical displacement imposed. As this displacement is increased, we observe first circular, then undulating and finally triangular blisters. We obtain theoretical predictions for the observed features of each of these three families of blisters. The theory is built upon the Föppl-von Kármán equations for thin elastic plates and accounts for the surface energy of the liquid. We find good quantitative agreement between our theoretical predictions and experimental results, demonstrating that all three families are governed by different balances between elastic and capillary forces. Our results may bear on micrometric tapered devices and other systems where elastic and adhesive forces are in competition.
description: 23 pages, 11 figs approx published version
A fully 3-dimensional thermal model of a comet nucleus
Creators: name: Rosenberg, E. D.
name: Prialnik, D.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: A 3-D numerical model of comet nuclei is presented. An implicit numerical scheme was developed for the thermal evolution of a spherical nucleus composed of a mixture of ice and dust. The model was tested against analytical solutions, simplified numerical solutions, and 1-D thermal evolution codes. The 3-D code was applied to comet 67P/Churyumov-Gerasimenko; surface temperature maps and the internal thermal structure was obtained as function of depth, longitude and hour angle. The effect of the spin axis tilt on the surface temperature distribution was studied in detail. It was found that for small tilt angles, relatively low temperatures may prevail on near-pole areas, despite lateral heat conduction. A high-resolution run for a comet model of 67P/Churyumov-Gerasimenko with low tilt angle, allowing for crystallization of amorphous ice, showed that the amorphous/crystalline ice boundary varies significantly with depth as a function of cometary latitude.
description: 19 pages, 10 figures
A Ballistic Two-Dimensional Lateral Heterojunction Bipolar Transistor
Creators: name: Lucchesi, Leonardo
name: Calogero, Gaetano
name: Fiori, Gianluca
name: Iannaccone, Giuseppe
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Applied Physics (physics.app-ph)
subject: Computational Physics (physics.comp-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We propose and investigate the intrinsically thinnest transistor concept: a monolayer ballistic heterojunction bipolar transistor based on a lateral heterostructure of transition metal dichalcogenides. The device is intrinsically thinner than a Field Effect Transistor because it does not need a top or bottom gate, since transport is controlled by the electrochemical potential of the base electrode. As typical of bipolar transistors, the collector current undergoes a tenfold increase for each 60 mV increase of the base voltage over several orders of magnitude at room temperature, without sophisticated optimization of the electrostatics. We present a detailed investigation based on self-consistent simulations of electrostatics and quantum transport for both electron and holes of a pnp device using MoS$_2$ for the 10-nm base and WSe$_2$ for emitter and collector. Our three-terminal device simulations confirm the working principle and a large current modulation I$_\text{ON}$/I$_\text{OFF}\sim 10^8$ for $ΔV_{\rm EB}=0.5$ V. Assuming ballistic transport, we are able to achieve a current gain $β\sim$ 10$^4$ over several orders of magnitude of collector current and a cutoff frequency up to the THz range. Exploration of the rich world of bipolar nanoscale device concepts in 2D materials is promising for their potential applications in electronics and optoelectronics.
description: Accepted for publication on Physical Review Research, 15 pages, 3 figures with subfigures
Observation of Unconventional Charge Density Wave without Acoustic Phonon Anomaly in Kagome Superconductors AV3Sb5 (A=Rb,Cs)
Creators: name: Li, H. X.
name: Zhang, T. T.
name: Pai, Y. -Y.
name: Marvinney, C.
name: Said, A.
name: Yilmaz, T.
name: Yin, Q.
name: Gong, C.
name: Tu, Z.
name: Vescovo, E.
name: Moore, R. G.
name: Murakami, S.
name: Lei, H. C.
name: Lee, H. N.
name: Lawrie, B.
name: Miao, H.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The combination of non-trivial band topology and symmetry breaking phases gives rise to novel quantum states and phenomena such as topological superconductivity, quantum anomalous Hall effect and axion electrodynamics. Evidence of intertwined charge density wave (CDW) and superconducting order parameters has recently been observed in a novel kagome material AV3Sb5 (A=K,Rb,Cs) that features a Z2 topological invariant in the electronic structure. However, the origin of the CDW and its intricate interplay with topological state has yet to be determined. Here, using hard x-ray scattering, we demonstrate a three-dimensional (3D) CDW with 2*2*2 superstructure in (Rb,Cs)V3Sb5. Unexpectedly, we find that the CDW fails to induce acoustic phonon anomalies at the CDW wavevector but yields a novel Raman mode which quickly damps into a broad continuum below the CDW transition temperature. Our observations exclude strong electron-phonon coupling driven CDW in AV3Sb5 and point to an unconventional and electronic-driven mechanism that couples the CDW and the topological band structure.
micrOMEGAs2.0: a program to calculate the relic density of dark matter in a generic model
Creators: name: Belanger, G.
name: Boudjema, F.
name: Pukhov, A.
name: Semenov, A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: micrOMEGAs2.0 is a code which calculates the relic density of a stable massive particle in an arbitrary model. The underlying assumption is that there is a conservation law like R-parity in supersymmetry which guarantees the stability of the lightest odd particle. The new physics model must be incorporated in the notation of CalcHEP, a package for the automatic generation of squared matrix elements. Once this is done, all annihilation and coannihilation channels are included automatically in any model. Cross-sections at $v=0$, relevant for indirect detection of dark matter, are also computed automatically. The package includes three sample models: the minimal supersymmetric standard model (MSSM), the MSSM with complex phases and the NMSSM. Extension to other models, including non supersymmetric models, is described.
description: 23 pages
Clockworks, hot pots, heat machines, and chemical machines : the contrivance aspect of the machine metaphor
Creators: name: Bromberg, Paul
Publisher: name: University of British Columbia
Year: 2010

description: From a general discussion concerning the shortcomings of the received view of scientific theories and scientific explanation I conclude that metaphorical thinking, until quite recently restricted to literary analysis, may play a significant role not only in the way theories are conceived, but also in the way that meaning is ascribed to the concepts used in science. The analysis of the literal realm of 'machine' considers three aspects that could appear in the metaphorical assimilation of organisms to machines: the contrivance aspect, which is the 'hardware'; the fact that machines exhibit purpose; finally, the integrated aspect of the machine (its harmony). The study is devoted only to the first aspect. I offer a narrative of pivotal ideas about the workings of the biological individual, from the clockworks of the early mechanicists to modern biochemistry, not just as a succession of discoveries but also as alleged accomplishments of the 'machine metaphor' revealing its scope. Some recognized milestones in the history of ideas about the inner workings of organisms are surveyed: the proposals of the early mechanicists during the Scientific Revolution, Lavoisier's view of respiration as combustion, Liebig's description of the human body as a chemical machine and the suggestion that the chemical accomplishments in living beings are the result of myriads of fermentation-like processes. I devote special attention to the problem of the direct conversion of chemical energy into mechanical energy using the evolution of ideas about muscular contraction as the main example. During the period 1900-1930 the study of colloidal behavior was considered to be the right path for unraveling most of the mysteries of vital processes. I carefully describe this work particularly the proposed models for muscular contraction and enzymatic action. The dismissal of this colloidal approach after the acceptance of the existence of those particular kinds of macromolecules that exist in living organisms marks the entrance of our modern approach. One of the remarkable features of the modern approach is the incessant elaboration of the idea of 'molecular machine'. I conclude with a discussion of the problem how literally can this metaphor be taken?
Gene induction during differentiation of human monocytes into dendritic cells: an integrated study at the RNA and protein levels
Creators: name: Angénieux, C.
name: Fricker, D.
name: Strub, J. M.
name: Luche, S.
name: Bausinger, H.
name: Cazenave, J. P.
name: Van Dorsselaer, A.
name: Hanau, D.
name: de la Salle, H.
name: Rabilloud, T.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Genomics (q-bio.GN)
subject: FOS: Biological sciences

description: Changes in gene expression occurring during differentiation of human monocytes into dendritic cells were studied at the RNA and protein levels. These studies showed the induction of several gene classes corresponding to various biological functions. These functions encompass antigen processing and presentation, cytoskeleton, cell signalling and signal transduction, but also an increase in mitochondrial function and in the protein synthesis machinery, including some, but not all, chaperones. These changes put in perspective the events occurring during this differentiation process. On a more technical point, it appears that the studies carried out at the RNA and protein levels are highly complementary.
description: website publisher: http://www.springerlink.com/content/ha0d2c351qhjhjdm/
title: H ηλεκτρονική διακυβέρνηση και η συμβολή της στην μείωση των δημοσίων δαπανών: Μελέτες περίπτωσης σε διεθνές επίπεδο
title: E-Government and its contribution to the reduction of public expenditures: Case studies at an international level
titleType: AlternativeTitle
Creators: name: Μπασούκος, Αναστάσιος
Publisher: name: Πανεπιστήμιο Δυτικής Αττικής
Year: 2023
Subjects: Δημόσια διοίκηση
Ηλεκτρονική διακυβέρνηση
Ηλεκτρονικές προμήθειες
Ηλεκτρονικές συναλλαγές
Public administration
E-government
e-Procurement
e-Transactions

description: Η παρούσα εργασία μελετά και διερευνά την συμβολή της Ηλεκτρονικής Διακυβέρνησης στη μείωση των Δημοσίων Δαπανών. Για τη μελέτη του θέματος, πραγματοποιείται μία ανασκόπηση της βιβλιογραφίας γύρω από τη Δημόσια Διοίκηση και την ανάπτυξη εφαρμογών Ηλεκτρονικής Διακυβέρνησης σε εθνικό και Πανευρωπαϊκό επίπεδο. Μέσα από τη μελέτη περιπτώσεων, θα εξαχθούν χρήσιμα συμπεράσματα σχετικά με την επίδραση της Ηλεκτρονικής Διακυβέρνησης στην μείωση των Δημοσίων Δαπανών σε Ευρωπαϊκό επίπεδο, αποτελώντας έναν χρήσιμο οδηγό για την εφαρμογή αντίστοιχων πρακτικών στην Ελληνική Δημόσια Διοίκηση.
title: Always Together: A Digital Diasporic Elegy
Creators: name: T. Prater, Tzarina
Publisher: name: Archipelagos Journal
Year: 2020
Subjects: subject: FOS: Humanities

description: This essay takes up the question of how diasporic Caribbean subjects deal with death, dying, and grieving in online spaces. With a focus on the genre of *digital diasporic elegy*, the author argues that by analyzing the digital life of a Sino-Caribbean diasporic cultural text, a digital diasporic elegiac practice emerges. This practice allows for consideration of the very code that enables our traversal between digital nodes, thereby allowing for a more nuanced understanding of rituals of mourning in our contemporary moment.
Obstruction theory for moduli spaces of framed flags of sheaves on the projective plane
Creators: name: Von Flach, Rodrigo A.
name: Jardim, Marcos
name: Lanza, Valeriano
Publisher: name: arXiv
Year: 2021
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14D21, 16G20

description: In a previous paper, the first two named authors established an isomorphism between the moduli space of framed flags of sheaves on the projective plane and the moduli space of stable representations of a certain quiver. In the present note, we substitute one of the claims made, namely [5, Theorem 17], for a weaker claim regarding the existence of unobstructed points in the quiver moduli space. We also extend some of the results of the cited paper, concerning the maximal stability chamber within which the isomorphism mentioned holds, and the existence of a perfect obstruction theory for the quiver moduli space.
description: 13 pages, 1 figure
title: Me, Myself, and Unno: Writing the Queer Caribbean Self into Digital Community
Creators: name: Josephs, Kelly Baker
Publisher: name: Archipelagos Journal
Year: 2020
Subjects: subject: FOS: Languages and literature

description: Caribbean autobiography in the mid-twentieth century grew as a method of combatting aporias in literary production and epistemological models, with novelists in particular writing themselves into visibility. But this tradition was predominantly male and decidedly heterosexual. Even as the Caribbean literary canon slowly diversified toward the end of the twentieth century with the inclusion of various life stories, the voices of queer writers remained at low volume, almost muted. This essay reads how those voices were enabled at the turn of the millennium by digital technologies. Reading digital versions of the personal narrative within the historical context of Caribbean autobiography, it examines the self-fashioning twenty-first-century Caribbean writers performed and published via the blogosphere. With particular focus on blogs by two Jamaican writers—Staceyann Chin and Marlon James—it argues that the form and technical features of blogging offered a safe space for queer Caribbean writers to "speak out" in ways that continued the tradition of Caribbean autobiography.
Three proofs of the Goulden-Litsyn-Shevelev conjecture on a sequence arising in algebraic geometry
Creators: name: Drake, Brian
name: Gessel, Ira M.
name: Xin, Guoce
Publisher: name: arXiv
Year: 2006
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05A19

description: I. P. Goulden, S. Litsyn, and V. Shevelev [On a sequence arising in algebraic geometry, J. Integer Sequences 8 (2005), 05.4.7] conjectured that certain Laurent polynomials associated with the solution of a functional equation have only odd negative powers. We prove their conjecture and generalize it.
description: 10 pages
title: Unmapping the Caribbean: Toward a Digital Praxis of Archipelagic Sounding
Creators: name: Goffe, Tao Leigh
Publisher: name: Archipelagos Journal
Year: 2020
Subjects: subject: FOS: Humanities

description: Tackling the conceptual grounds of how maps have been deployed as tools of imperial capitalist extraction, this essay critiques how the two-dimensional visualization of land has traditionally flattened the racial entanglement of the Caribbean archipelago. It explores how born-digital cartography can be used to open up a new sensory possibility for understanding space amplified by sonic and video technologies. The author embarked on the digital project *Unmapping the Caribbean* with her students and a team of technologists, employing Esri's ArcGIS Story Maps platform to examine the contours of *marronage* and indigeneity in five geographies: New York City, Suriname, Hispaniola, Cuba, and Jamaica. The project anchors the relationality of sedimented racial histories in the archipelago through the concept of "unmapping"—that is, by creating digital audiovisual story maps of the five Caribbean spaces. Centering the way sound orients the human body in space, the project examines the politics of the opacity of spaces of black and indigenous refuge in Caribbean and Caribbean diasporic communities. The essay considers the pedagogical stakes of collaborative digital assignments that include mapmaking and producing visual soundtracks. The five geographic narratives that *Unmapping the Caribbean* has woven together are part of an ongoing project that aims to articulate archipelagic being.
Non-leptonic two-body decays of $Λ_b^0$ in light-front quark model
Creators: name: Geng, C. Q.
name: Liu, Chia-Wei
name: Tsai, Tien-Hsueh
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We study the non-leptonic two-body weak decays of $Λ_b^0 \to p M$ with $ M=(π^-,K^-)$ and $(ρ^-,K^{*-})$ in the light-front quark model under the generalized factorization ansatz. By considering the Fermi statistic between quarks and determining spin-flavor structures in baryons, we calculate the branching ratios (${\cal B}$s) and CP-violating rate asymmetries ($\mathcal{A}_{CP}$s) in the decays. Explicitly, we find that ${\cal B}( Λ_b^0 \to p π^- ,pK^-)=(4.18\pm0.15\pm0.30, 5.76\pm0.88\pm0.23)\times10^{-6}$ and ${\mathcal{A}_{CP}}( Λ_b^0 \to p π^- ,\,pK^-)=(-3.60\pm0.14\pm0.14, 6.36\pm0.21\pm0.18)\%$ in comparison with the data of ${\cal B}( Λ_b^0 \to p π^- ,pK^-)=(4.5\pm0.8, 5.4\pm1.0)\times10^{-6}$ and ${\mathcal{A}_{CP}}( Λ_b^0 \to p π^- ,pK^-)=(-2.5\pm 2.9, -2.5\pm2.2)\%$ given by the Particle Data Group, respectively. We also predict that ${\cal B}( Λ_b^0 \to p ρ^-,pK^{*-} )=(12.13\pm3.27\pm0.91, 2.58\pm0.87\pm0.13)\times 10^{-6}$ and ${\mathcal{A}_{CP}}( Λ_b^0 \to p ρ^-,pK^{*-} )=(-3.32\pm0.00\pm0.14,19.25\pm0.00\pm0.80)\%$, which could be observed by the experiments at LHCb.
description: 16 pages, 1 figure, accepted for publication in PLB. arXiv admin note: text overlap with arXiv:2002.10612