cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
European banks' business models and their credit risk: A cluster analysis in a high-dimensional context
Creators: name: Farnè, Matteo
name: Vouldis, Angelos T.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Applications (stat.AP)
subject: FOS: Computer and information sciences

description: In this paper, we investigate the credit risk in the loan portfolio of banks following different business models. We develop a data-driven methodology for identifying the business models of the 365 largest European banks that is suitable for very granular harmonised supervisory data. Our dataset allows us to take into account the full range of the activities in which banks are involved. The proposed method combines in an optimal way data clustering, dimensionality reduction and outlier detection. We identify four business models and exclude as 'outliers' banks that follow idiosyncratic business models. Furthermore, empirical evidence is provided that banks following different business models differ significantly with respect to the credit risk they undertake in their loan portfolios. Traditional commercial banks are characterized by the lowest levels of credit risk while the loan portfolios of securities holding banks are riskier compared to the other banks.
Nanoporous compound materials for optical applications - microlasers and microresonators
Creators: name: Laeri, Franco
name: Noeckel, Jens
Publisher: name: arXiv
Year: 2004
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: This book chapter is the first part of a review of nanoporous materials for optical applications. Whereas the second part [J.Sauer, F. Marlow and F.Schueth, pp. 153-172 of the same volume] discusses material properties, this part gives a self-contained discussion of fluorescence and lasing in dielectric microresonators, with special emphasis on the hexagonal morphology found in molecular-sieve-dye compounds.
description: For higher-quality figures, see http://darkwing.uoregon.edu/~noeckel/papers.php#xref21
Essays on Financial Risk Management
Creators: name: Tran, Chi T. M.
Publisher: name: University of Leicester
Year: 2020
Subjects: Uncategorized

description: This thesis comprises three essays on systemic risk using a computational approach for the first two chapters and statistical analysis for the third. Chapter 1 uses an agent-based model to determine whether the stability of a financial system can be improved by incorporating BCVA into the pricing of OTC derivative contracts. The results illustrate that the adjustments of financial institutions credit can not only improve the stability of financial counter-parties in credit events but can also reduce systemic risk in the entire network. The scale of the benefit is dependent upon the leverage of institutions and is significantly affected by connectivity and the premium of derivative contracts. Chapter 2 investigates systemic risk in an agent-based model with collateral commitments. Market prices of collateral are calculated by optimisation functions of financial institutions' efficiency. The experiments indicate that the value adjustments (xVA) is more effective at eliminating financial systemic risk than by incorporating only BCVA. However, this effect is unclear in systems of weak infrastructure. The benefit of xVA is also reduced by large exogenous shocks. Similarly, the market prices of collateral decline under high leverage or large premiums because there serves for value adjustments limit financial funding of counter-parties. Asset traders can only offer lower bid-ask prices. Chapter 3 tests the effectiveness of Basel III liquidity standards to enhance the stability of the banking sector. The analyses provide significant evidence that the long-term liquidity regulation of NSFR exacerbates bank profitability and fragility, especially for large banks. Short-term liquidity standard, also known as LCR, has a positive influence on ROAA but a negative impact on bank risk-taking. Nonetheless, these effects are economically insignificant. The Basel III regulations are therefore ineffective at improving bank strength; indeed they reduce bank performance.
Spatial Information Guided Convolution for Real-Time RGBD Semantic Segmentation
Creators: name: Chen, Lin-Zhuo
name: Lin, Zheng
name: Wang, Ziqin
name: Yang, Yong-Liang
name: Cheng, Ming-Ming
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: 3D spatial information is known to be beneficial to the semantic segmentation task. Most existing methods take 3D spatial data as an additional input, leading to a two-stream segmentation network that processes RGB and 3D spatial information separately. This solution greatly increases the inference time and severely limits its scope for real-time applications. To solve this problem, we propose Spatial information guided Convolution (S-Conv), which allows efficient RGB feature and 3D spatial information integration. S-Conv is competent to infer the sampling offset of the convolution kernel guided by the 3D spatial information, helping the convolutional layer adjust the receptive field and adapt to geometric transformations. S-Conv also incorporates geometric information into the feature learning process by generating spatially adaptive convolutional weights. The capability of perceiving geometry is largely enhanced without much affecting the amount of parameters and computational cost. We further embed S-Conv into a semantic segmentation network, called Spatial information Guided convolutional Network (SGNet), resulting in real-time inference and state-of-the-art performance on NYUDv2 and SUNRGBD datasets.
Proprioseiopsis pascuus
Creators: name: De Moraes, Gilberto J.
name: Zannou, Ignace D.
name: Ueckermann, Eddie A.
name: Oliveira, Anibal R.
name: Hanna, Rachid
name: Yaninek, John S.
Publisher: name: Zenodo
Year: 2007
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Mesostigmata
Phytoseiidae
Proprioseiopsis
Proprioseiopsis pascuus

description: Proprioseiopsis pascuus (Van der Merwe)
(Fig. 14)
 Amblyseius (Amblyseius) pascuus Van der Merwe, 1968: 116; Ueckermann & Loots, 1988: 67.
 Proprioseiopsis pascuus, Moraes et al., 2004: 186; Chant & McMurtry, 2005a: 15.
Female. (Specimens measured. South Africa: holotype and 1 additional specimen)
Dorsum. Dorsal shield smooth, 293 [318] long and 208 [235] wide. Setae j1 25, j3 35 [38], j4 5 [6], j5 5 [6], j6 6, J5 8, z2 16 [19], z4 9 [13], z5 5 [6], Z1 6, Z4 79 [91], Z5 72 [85], s4 63 [72], S2 9, S4 9, S5 9, r3 19 [22], R1 13 [16]. Setae smooth, except Z4 and Z5 which are serrate.
Venter. Sternal shield smooth, posterior margin concave; distances between St1-St3 54 [57], St2-St2 63 [65]. Genital shield smooth; distance between St5-St5 63 [66]. Ventrianal shield pentagonal, with transverse striation, anterior margin slightly concave, 101 [113] long, 95 [101] wide at level of Zv2 and 82 [85] wide at level of anus, preanal pores mesad and slightly posterior to Jv2. Ventral setae smooth.
 Chelicera. Movable digit 28 long, with 2 teeth; fixed digit 28 long, with 8 teeth and a pilus dentilis.
Spermatheca. Calyx trumpet-shaped, 25 long; atrium nodular.
Legs. Sharp-tipped macrosetae; Sge IV 57, Sti IV 38 [41], St IV 57. Chaetotaxy: Sge II: 2-2/0, 2/0- 1; Sge III: 1-2/1, 2/0-1.
MALE. (Specimen measured. South Africa: 1 paratype).
Dorsum. Dorsal shield pattern as in female, 252 long and 161 wide. Setae j1 19, j3 25, j4 6, j5 6, j6 6, J5 6, z2 13, z4 9, z5 5, Z1 6, Z4 51, Z5 50, s4 44, S2 6, S4 6, S5 6, r3 16, R1 13. Setae smooth except Z4 and Z5 which are serrate.
Venter. Ventrianal shield subtriangular and faintly reticulate; 104 long and 139 wide at anterior corners, with 3 pairs of preanal setae, 1 pair of preanal pores, additional pores not visible.
Spermatodactyl. Shaft 14 long.
Legs. Macrosetae sharp-tipped; Sge IV 32, Sti IV 22, St IV 44. Chaetotaxy of genua II and III as in female.
 Specimens examined. South Africa: Potchefstroom, North-West Province, from soil covered with Eragrostis curvula, 1963, L.J. Erasmus (holotype female and paratype male); Buffelspoort near Brits, North-West Province, from Hyparrhenia hirta, 15-III-1977, E.A. Ueckermann.
World distribution. South Africa.
description: Published as part of De Moraes, Gilberto J., Zannou, Ignace D., Ueckermann, Eddie A., Oliveira, Anibal R., Hanna, Rachid & Yaninek, John S., 2007, Species of the subtribes Arrenoseiina and Proprioseiopsina (Tribe Amblyseiini) and the tribe Typhlodromipsini (Acari: Phytoseiidae) from sub-Saharan Africa, pp. 1-39 in Zootaxa 1448 (1) on pages 20-21, DOI: 10.11646/zootaxa.1448.1.1, http://zenodo.org/record/5077273
The physics of pulses in gamma-ray bursts: emission processes, temporal profiles and time lags
Creators: name: Daigne, Frederic
name: Mochkovitch, Robert
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a simple, semi-analytical model to explain GRB temporal and spectral properties in the context of the internal shock model. Each individual pulse in the temporal profiles is produced by the deceleration of fast moving material by a comparatively slower layer within a relativistic wind. The spectral evolution of synthetic pulses is first obtained with standard equipartition assumptions to estimate the post-shock magnetic field and electron Lorentz factor. We get Ep propto t^-delta with delta=7/2 which is much steeper than the observed slopes delta(obs) <= 1.5. We therefore consider the possibility that the equipartition parameters depend on the shock strength and post-shock density. We then get a much better agreement with the observations and our synthetic pulses satisfy both the hardness-intensity and hardness-fluence correlations. We also compute time lags between profiles in different energy channels and we find that they decrease with increasing hardness. We finally compare our predicted time lag - luminosity relation to the Norris et al. (2000) result obtained from 6 bursts with known redshift.
description: 6 pages, 7 figures, to be published in MNRAS
Analytical Quantile Solution for the S-distribution, Random Number Generation and Statistical Data Modeling
Creators: name: Hernández-Bermejo, Benito
name: Sorribas, Albert
Publisher: name: arXiv
Year: 2019
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics

description: The selection of a specific statistical distribution is seldom a simple problem. One strategy consists in testing different distributions (normal, lognormal, Weibull, etc.), and selecting the one providing the best fit to the observed data and being the most parsimonious. Alternatively, one can make a choice based on theoretical arguments and simply fit the corresponding parameters to the observed data. In either case, different distributions can give similar results and provide almost equivalent results. Model selection can be more complicated when the goal is to describe a trend in the distribution of a given variable. In those cases, changes in shape and skewness are difficult to represent by a single distributional form. As an alternative to the use of complicated families of distributions as models for data, the S-distribution [{\sc Voit, E.O. }(1992) Biom.J. 7:855-878] provides a highly flexible mathematical form in which the density is defined as a function of the cumulative. Besides representing well-known distributions, S-distributions provide an infinity of new possibilities that do not correspond with known classical distributions. In this paper we obtain an analytical solution for the quantile equation that highly simplifies the use of S-distributions. We show the utility of this solution in different applications. After classifying the different qualitative behaviors of the S-distribution in parameter space, we show how to obtain different S-distributions that accomplish specific constraints. One interesting case is the possibility of obtaining distributions that acomplish P(X <= X_c)=0. Then, we show that the quantile solution facilitates the use of S-distributions in Monte-Carlo experiments through the generation of random samples. Finally, we show how to fit an S-distribution to actual data, so that the resulting distribution can be used as a statistical model for them.
description: 20 pages, 6 Figures
The Economics of Human Capital Investment, Rents and Wage Inequality
Creators: name: Ullah, Akbar
Publisher: name: University of Leicester
Year: 2020
Subjects: Uncategorized

description: This thesis examines three different, self-contained topics in the field of labour economics. The first chapter presents evidence which shows that firms are charging rent on training, capital and R&D investment, but they do not charge such a rent on working hours. It shows that under standard production functions, this evidence is inconsistent with models of human capital where wage setting takes place through bargaining and/or the worker’s quit decision is exogenous. Then, it develops a model where the worker has no bargaining power and makes optimal quit decision to better explain the evidence. In such a model, the firm optimal wage strategy is to charge rent on only those factors which are under firm’s direct control such as workers training. The model also contributes to the literature that tries to explain firms’ investment in workers transferable skills. The second chapter addresses the findings that workers who have high pre-job schooling also get more training during jobs. It develops a model of investment in human capital which shows that training can increase in pre-job schooling only if schooling increases efficiency of training in human capital production or affects worker’s preferences. But except the positive efficiency effects, all the possible preferences effects of schooling are on their own not enough to generate increasing wage function in schooling. When schooling has a positive role in human capital production, then human capital, consumption and wages are strictly increasing in pre-job schooling. The model generated net of training cost wage distribution can at least partly explain the US workers’ earnings distribution by education categories. Unlike standard labour-leisure choice models a novel and empirically testable prediction of the model is that, although highly qualified workers work for less time, they spend this time in learning rather than in leisure. Chapter three addresses the conflicting evidence about the wage return of training. Longitudinal panel data based studies during the 1990s and the 2000s give very high wage return of training. On the other hand, studies in the 2010s that are based on randomised experiments estimate insignificant return from training. Using the recently developed heterogeneity robust techniques, this chapter shows that training’s immediate wage effects are low on average but it has high and significant long term wage effects. The chapter concludes that the experiment based studies suffer from small sample size and short time span as in these studies only immediate post-training period data is considered for the analysis.
Symmetry Breaking and Enhanced Condensate Fraction in a Matter-Wave Bright Soliton
Creators: name: Kanamoto, Rina
name: Saito, Hiroki
name: Ueda, Masahito
Publisher: name: arXiv
Year: 2004
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: An exact diagonalization study reveals that a matter-wave bright soliton and the Goldstone mode are simultaneously created in a quasi-one-dimensional attractive Bose-Einstein condensate by superpositions of quasi-degenerate low-lying many-body states. Upon formation of the soliton the maximum eigenvalue of the single-particle density matrix increases dramatically, indicating that a fragmented condensate converts into a single condensate as a consequence of the breaking of translation symmetry.
description: 4 pages, 4 figures, revised version
Typhlodromipsini Chant & McMurtry
Creators: name: De Moraes, Gilberto J.
name: Zannou, Ignace D.
name: Ueckermann, Eddie A.
name: Oliveira, Anibal R.
name: Hanna, Rachid
name: Yaninek, John S.
Publisher: name: Zenodo
Year: 2007
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Mesostigmata
Phytoseiidae

description: Tribe Typhlodromipsini Chant & McMurtry  Typhlodromipsini Chant & McMurtry, 2005b: 318.
Chant & McMurtry (2005b) gave a full description of this Amblyseiinae tribe. Diagnostic characters for this tribe (Chant & McMurtry, 2006) are: idiosoma with more than 25 pairs of setae, ratio between the length of seta s4 and that of seta Z1 smaller than 3.1, seta S4 present, dorsal shield entire, peritrematal shield fused anteriorly to the dorsal shield, peritreme extending forward to level of j1, sternal shield with 3 pairs of setae and usually without median posterior projection, females with 3 pairs of preanal setae and a pair of preanal pores, fixed cheliceral digit multidentate, and genua II and III rarely without macrosetae.
 Of the 8 genera belonging to this subtribe (Chant & McMurtry, 2005b), only Afrodromips Chant & McMurtry, Aristadromips Chant & McMurtry, Scapulaseius Karg & Oomen-Kalsbeek and Typhlodromips De Leon are known from sub-Saharan Africa.
description: Published as part of De Moraes, Gilberto J., Zannou, Ignace D., Ueckermann, Eddie A., Oliveira, Anibal R., Hanna, Rachid & Yaninek, John S., 2007, Species of the subtribes Arrenoseiina and Proprioseiopsina (Tribe Amblyseiini) and the tribe Typhlodromipsini (Acari: Phytoseiidae) from sub-Saharan Africa, pp. 1-39 in Zootaxa 1448 (1) on page 22, DOI: 10.11646/zootaxa.1448.1.1, http://zenodo.org/record/5077273
XMM-Newton observations of the binary cluster system Abell 399/401
Creators: name: Sakelliou, Irini
name: Ponman, Trevor J.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Abell 399 and Abell 401 are both rich clusters of galaxies, at temperatures 7.2keV and 8.5keV respectively. They lie at a projected separation of ~3Mpc, forming a close pair. We have observed the system with the XMM-Newton satellite. The data of each cluster show significant departures from our idealised picture of relaxed rich clusters. There is also evidence for enhanced X-ray flux in the region between the two, where the temperature is higher than our expectations. Although tidal or compression effects might affect the large scale structure of the two clusters, we show that these cannot account for the distortions seen in the inner regions. We argue that the reasonably relaxed morphology of the clusters, and the absence of major temperature anomalies, argues against models in which the two have already experienced a close encounter. The properties of the intermediate region suggests that they are at an early stage of merging, and are currently interacting mildly, because their separation is still too large for more dramatic effects. The substructure we find in their inner regions seems to point to their individual merging histories. It seems likely that in the Abell 399/401 system, we are witnessing two merger remnants, just before they merge together to form a single rich cluster. This picture is consistent with recent numerical simulations of cluster formation. (abridged)
description: 20 pages, 14 figures, to be published in MNRAS
title:  Traiettorie concettuali per una rilettura delle relazioni organizzative nell’amministrazione complessa
Creators: name: D’Angelo  , Filippo
Publisher: name: Roma TrE-Press
Year: 2022

description: Del procedimento amministrativo si è soliti discorrere in due distinte, ma tutto sommato limitrofe, prospettive d’indagine: come fattispecie a formazione progressiva secondo una concezione di carattere formale; come luogo in cui si svolge, dal lato sostanziale, il potere pubblico in rapporto alle pretese dei privati. Ad esse corrispondono due visioni classiche del fenomeno procedimentale nella dogmatica di diritto amministrativo. Vi è però un terza via per inquadrare il procedimento amministrativo in genere poco battuta e non sempre lumeggiata in ambito scientifico: la dimensione organizzativa. Il saggio muove esattamente in questa direzione e tenta di offrire una (nuova) definizione del procedimento amministrativo come figura di organizzazione; e lo fa prendendo a modello alcuni procedimenti di coamministrazione dell’Unione europea ed esaminando i variegati intrecci tra le competenze degli enti pubblici contitolari della funzione che assumono la consistenza di autentiche relazioni intersoggettive di tipo organizzatorio. L’occasione è quella di riflettere sulla fisionomia delle relazioni organizzative nell’amministrazione contemporanea, sul loro ruolo, sulla loro finalità, ma soprattutto sul loro legame inscindibile col procedimento amministrativo.
description: Dialoghi di diritto amministrativo. Lavori del laboratorio di diritto amministrativo 2020-2021
Rigidity of Kac-Schwarz operators
Creators: name: Luu, Martin
Publisher: name: arXiv
Year: 2019
Subjects: subject: Mathematical Physics (math-ph)
subject: Representation Theory (math.RT)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: In his work on the mathematical formulation of 2d quantum gravity Schwarz established a rigidity result for Kac-Schwarz operators for the n-KdV hierarchies. Later on, Adler and van Moerbeke as well as Fastré obtained different proofs of this result. We give yet another proof of the rigidity, one that in fact holds for all Drinfeld-Sokolov hierarchies.
Electronic specific heat and low energy quasiparticle excitations in superconducting state of $La_{2-x}Sr_xCuO_4$ single crystals
Creators: name: Wen, Hai-Hu
name: Liu, Zhi-Yong
name: Zhou, Fang
name: Xiong, Jiwu
name: Ti, Wenxing
name: Xiang, Tao
name: Komiya, Seiki
name: Sun, Xuefeng
name: Ando, Yoichi
Publisher: name: arXiv
Year: 2004
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Low temperature specific heat has been measured and extensively analyzed on a series of $La_{2-x}Sr_xCuO_4$ single crystals from underdoped to overdoped regime. From these data the quasiparticle density of states (DOS) in the mixed state is derived and compared to the predicted scaling law $C_{vol}/T\sqrt{H}=f(T/\sqrt{H})$ of d-wave superconductivity. It is found that the scaling law can be nicely followed by the optimally doped sample (x=0.15) in quite wide region of ($T/\sqrt{H} \leq 8 K /\sqrt{T}$). However, the region for this scaling becomes smaller and smaller towards more underdoped region: a clear trend can be seen for samples from x=0.15 to 0.069. Therefore, generally speaking, the scaling quality becomes worse on the underdoped samples in terms of scalable region of $T/\sqrt{H}$. This feature in the underdoped region is explained as due to the low energy excitations from a second order (for example, anti-ferromagnetic correlation, d-density wave, spin density wave or charge density wave order) that may co-exist or compete with superconductivity. Surprisingly, deviations from the d-wave scaling law have also been found for the overdoped sample (x=0.22). While the scaling law is reconciled for the overdoped sample when the core size effect is taken into account. An important discovery of present work is that the zero-temperature data follow the Volovik's relation $Δγ(T=0)=A\sqrt{H}$ quite well for all samples investigated here although the applicability of the d-wave scaling law to the data at finite temperatures varies with doped hole concentration. Finally we present the doping dependence of some parameters, such as, the residual linear term $γ_0$, the $α$ value, etc. ...
description: 15 pages, 24 figures
Random temporal laser speckles for robust measurement of sub-microsecond photoluminescence decay
Creators: name: Junek, Jiri
name: Ondic, Lukas
name: Zidek, Karel
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Time-resolved photoluminescence (PL) is commonly used to track dynamics in a broad range of materials. Thus, the search for simplification of the acquisition of PL kinetics attracts continuous attention. This paper presents a new robust and straightforward approach to the measurement of PL decay, which is based on randomly fluctuating excitation intensity. The random excitation waveform is attained by using laser speckles generated on a rotating diffuser. Owing to this, the presented technique is able to utilize any coherent excitation source without the necessity to generate short pulses or to controllably modulate the light. PL decay can be computationally reconstructed from the Fourier image of the PL trace. The paper demonstrates the performance of the method, which is able to acquire sub-microsecond dynamics as the impulse response function reaches 300 ns. The reconstructed PL decays were compared to streak camera measurements to verify the method. Finally, potential limitations and applications of the technique are discussed.
Fast and optimal pathfinding
Creators: name: Harabor, Daniel Damir
Publisher: name: The Australian National University
Year: 2014

description: Pathfinding (or navigating) from A to B is a common problem in Computer Science with broad practical applications in areas as diverse as digital entertainment, logistics and robotics. Pathfinding is made difficult when many variations, or symmetries, of the same path exist. Symmetry slows down search by forcing otherwise performant algorithms to waste time considering many equivalent states. We speed things up by developing new online and offline symmetry-breaking techniques that eliminate a large number of symmetric states. Our contributions are optimality preserving, memory efficient and can have a dramatic positive effect on algorithmic performance They are especially well suited to speeding up pathfinding search on grid-maps of the type widely employed in computer games and robotics. Moreover, our work is largely orthogonal with a wide range of efficiency-improving techniques that have been previously described in the academic literature. We investigate a number of novel symmetry breaking approaches. Rectangular Symmetry Reduction identifies symmetric path segments during an offline pre-processing step. This approach is optimal, requires very little overhead (usually a few seconds of up-front time and a linear amount of memory) and it can improve the performance of classical pathfinding algorithms such as A{*} by several factors. Our second contribution, Jump Point Search (JPS), significantly improves on the performance of RSR and currently represents the state of the art for pathfinding on grid-map domains. In its online form JPS requires zero preprocessing, zero additional memory and always finds the shortest path. Our experiments show that JPS can consistently improve the performance of A{*} search by over one order of magnitude and more. In its offline form JPS reformulates the search space to achieve even better performance but requires an up-front investment of time. The algorithm has zero memory overheads when applied to graphs that are stored as an adjacency list. When applied to graphs stored as an adjacency matrix, the algorithm introduces a linear-sized memory overhead. In addition to RSR and JPS we study the related any-angle pathfinding problem. Recently formulated but nevertheless well studied, this problem involves finding a shortest path in a grid-map domain but asks that the path is not constrained to the points of the grid. Though a range of approaches have been suggested there are no effective techniques, to date, that are both optimal and online. As a final contribution we give a first algorithm that can provably compute solutions having both of these desirable characteristics.
title: Survey of Agent Based Modelling and Simulation Tools
Creators: name: Allan, R J
Publisher: name: STFC
Year: 2010
Subjects: archaeology
agent based modelling

description: Agent Based Modelling and Simulation is a computationally demanding technique having itsorigins in discrete event simulation, genetic algorithms and cellular automata. It is a powerful technique for simulating dynamic complex systems and observing "emergent" behaviour. There is currently a lot of interest in developing ABMs as a general computational technique applicable to the study of large scale systems. ABMs has been adapted to run on novel architectures such as GPGPU, e.g. nVidia hardware using the CUDA programming language. Argonne National Laboratory have a Web site on Exascale ABMs and have run models on the IBM BlueGene with funding from the SciDAC Programme. The most common uses of ABMs are in social simulation and optimisation problems, such as crowd behaviour, urban simulation, traffic flow and supply chains. We will investigate other uses in computational science, particularly in engineering and systems biology.
Quark mass dependence of pseudoscalar masses and decay constants
Creators: name: Q Collaboration
name: Farchioni, F.
name: Gebert, C.
name: Montvay, I.
name: Scholz, E.
name: Scorzato, L.
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: The dependence of pseudo-scalar masses and decay constants on the sea and valence quark masses is investigated in the pseudo-Goldstone boson sector of QCD with two light quark flavours. The sea quark masses are at present in the range ${1/3}m_s \leq m_{ud} \leq {2/3}m_s$ whereas the valence quark masses satisfy ${1/2}m_{sea} \leq m_{val} \leq 2m_{sea}$. The values of the Gasser-Leutwyler low energy constants $L_4$, $L_5$, $L_6$ and $L_8$ are estimated. The computation is done with the Wilson-quark lattice action at gauge coupling $β=5.1$ on $16^4$ lattices. ${\cal O}(a)$ effects are taken into account by applying chiral perturbation theory for the Wilson lattice action as proposed by Rupak and Shoresh.
description: 3 pages. Lattice2003(Spectrum)
M5-brane as a Nambu-Poisson geometry of a Multi D1-brane theory
Creators: name: De Castro, A.
name: del Moral, M. P. Garcia
name: Martin, I.
name: Restuccia, A.
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We introduce a Nambu-Poisson bracket in the geometrical description of the D=11 M5-brane. This procedure allows us, under some assumptions, to eliminate the local degrees of freedom of the antisymmetric field in the M5-brane Hamiltonian and to express it as a D=11 p-brane theory invariant under symplectomorphisms. A regularization of the M5-brane in terms of a multi D1-brane theory invariant under the $SU(N)\times SU(N)$ group in the limit when $N\to\infty$ is proposed. Also, a regularization for the D=10 D4-brane in terms of a multi D0-brane theory is suggested.
description: 14 pages, no figures, revtex
Investment Decisions In Development Projects: A Cultural Political Economy Of Development Accounting
Creators: name: Chathurani L. K. R. Rathnayaka Mudiyanselage
Publisher: name: University of Leicester
Year: 2020
Subjects: Uncategorized

description: Accounting for development has recently gained attention in the extant literature, advancing a research agenda considering structural issues and their impact on accounting practices of both in state and private sector institutions. The role of politics and power in accounting and accountability, especially on resource allocation has been studied with different theoretical frameworks with increasing focus given to the divergent roles of culture and politics, and how these can influence organizational budgeting and resource allocation mechanisms. However, the role of politics in accounting and accountability structures in development agendas, especially in development projects has only been addressed intermittently. By focusing on the management accounting controls and accountability mechanisms in development projects, particularly infrastructural, this thesis tries to fill the gap identified above. It takes a Cultural Political Economy perspective to theorize case study findings of accounting and accountability in development context. The finding exemplifies that donor-funded development projects produce neo-colonial relationships through multi-level patronage politics and ambiguity in management accounting controls and accountability mechanisms. The power relations infused by patronage politics captures the different forms of power within and beyond the state which subsequently, result in departures from ideal types of management accounting controls, perpetuating violation of management accounting controls. This thesis contributes to the debate in the (cultural) political economy of accounting research in Less Developed Countries and development studies.
Low-energy excitations in type-II Weyl semimetal Td-MoTe2 evidenced through optical conductivity
Creators: name: Santos-Cottin, D.
name: Martino, E.
name: Mardele, F. Le
name: Witteveen, C.
name: von Rohr, F. O.
name: Homes, C. C.
name: Rukelj, Z.
name: Akrap, Ana
Publisher: name: arXiv
Year: 2019
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Molybdenum ditelluride, MoTe2, is a versatile material where the topological phase can be readily tuned by manipulating the associated structural phase transition. The fine details of the band structure of MoTe2, key to understanding its topological properties, have proven difficult to disentangle experientially due to the multi-band character of the material. Through experimental optical conductivity spectra, we detect two strong low-energy interband transitions. Both are linked to excitations between spin-orbit split bands. The lowest interband transition shows a strong thermal shift, pointing to a chemical potential that dramatically decreases with temperature. With the help of ab initio calculations and a simple two-band model, we give qualitative and quantitative explanation of the main features in the temperature-dependent optical spectra up to 400 meV.
Charge Transfer and Charge Transport on the Double Helix
Creators: name: Armitage, N. P.
name: Briman, M.
name: Gruner, G.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Biomolecules (q-bio.BM)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: We present a short review of various experiments that measure charge transfer and charge transport in DNA. Some general comments are made on the possible connection between 'chemistry-style' charge transfer experiments that probe fluorescence quenching and remote oxidative damage and 'physics-style' measurements that measure transport properties as defined typically in the solid-state. We then describe measurements performed by our group on the millimeter wave response of DNA. By measuring over a wide range of humidity conditions and comparing the response of single strand DNA and double strand DNA, we show that the appreciable AC conductivity of DNA is not due to photon assisted hopping between localized states, but instead due to dissipation from dipole motion in the surrounding water helix.
description: 7 pages, 3 figures
A Note on Supersymmetry in Noncommutative Field Theories
Creators: name: Nishimura, Madoka
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We show that a solution of the type IIB supergravity representing D3-branes in the presence of a 2-form background has 16 supersymmetries by explicitly constructing the transformation parameter of unbroken supersymmetry. This solution is dual to a noncommutative Yang-Mills theory in a certain limit.
description: 10 pages, no figures
Illuminating Protogalaxies? The Discovery of Extended Lyman-alpha Emission around a QSO at z=4.5
Creators: name: Bunker, Andrew
name: Smith, Joanna
name: Spinrad, Hyron
name: Stern, Daniel
name: Warren, Stephen
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have discovered extended Lyman-$α$ emission around a $z=4.5$ QSO in a deep long-slit spectrum with Keck/LRIS at moderate spectral resolution ($R\approx 1000$). The line emission extends 5\,arcsec beyond the continuum of the QSO and is spatially asymmetric. This extended line emission has a spectral extent of 1000km/s, much narrower in velocity spread than the broad Lyman-$α$ from the QSO itself and slightly offset in redshift. No evidence of continuum is seen for the extended emission line region, suggesting that this recombination line is powered by reprocessed QSO Lyman continuum flux rather than by local star formation. This phenomenon is rare in QSOs which are not radio loud, and this is the first time it has been observed at $z>4$. It seems likely that the QSO is illuminating the surrounding cold gas of the host galaxy, with the ionizing photons producing Lyman-$α$ fluorescence. As suggested by Haiman \& Rees (2001), this ``fuzz'' around a distant quasar may place strong constraints on galaxy formation and the extended distribution of cold, neutral gas.
description: To appear in proceedings of "EuroKiel" meeting (2002) - 4 pages
Lurestan 2D - FEM.rar
Creators: name: Basilici, Matteo
name: Ascione, Alessandra
name: Megna, Antonella
name: Santini, Stefano
name: Tavani, Stefano
name: Valente, Ettore
name: Mazzoli, Stefano
Publisher: name: figshare
Year: 2020
Subjects: subject: Geophysics
subject: FOS: Earth and related environmental sciences

description: Data of the 2-D Finite Element Modeling of the paper: Basilici et al. Active deformation and relief evolution in the western Lurestan region of the Zagros mountain belt: new insight from finite element modeling. Tectonics.
Afrodromips Chant & McMurtry
Creators: name: De Moraes, Gilberto J.
name: Zannou, Ignace D.
name: Ueckermann, Eddie A.
name: Oliveira, Anibal R.
name: Hanna, Rachid
name: Yaninek, John S.
Publisher: name: Zenodo
Year: 2007
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Mesostigmata
Phytoseiidae
Afrodromips

description: Afrodromips Chant & McMurtry
 Afrodromips Chant & McMurtry, 2005b: 330.
The single species known in this genus (Chant & McMurtry, 2005b) was described from Africa. Distinguishing characteristics of this genus are: sum of the ratios “length of dorsal shield/ length of S4” and “length of dorsal shield/ length of S5” greater than 26.0; idiosomal setal pattern 10A:10B/JV-3:ZV (seta J1 present); r3 and R1 inserted on dorsal shield; absence of seta z6; seta s4 at least twice as long as one or more of the other lateral setae; setae z2 and z4 not longer than distances between their bases and bases of next setae behind.
description: Published as part of De Moraes, Gilberto J., Zannou, Ignace D., Ueckermann, Eddie A., Oliveira, Anibal R., Hanna, Rachid & Yaninek, John S., 2007, Species of the subtribes Arrenoseiina and Proprioseiopsina (Tribe Amblyseiini) and the tribe Typhlodromipsini (Acari: Phytoseiidae) from sub-Saharan Africa, pp. 1-39 in Zootaxa 1448 (1) on page 22, DOI: 10.11646/zootaxa.1448.1.1, http://zenodo.org/record/5077273
Collection of micromirror-modulated light in the single-pixel broadband hyperspectral microscope
Creators: name: Klein, Lukas
name: Zidek, Karel
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Digital micromirror device (DMD) serves in a significant part of computational optical setups as a means of encoding an image by the desired pattern. The most prominent is its usage in the so-called single-pixel camera experiment. This experiment often requires an efficient and homogenous collection of light from a relatively large chip on a small area of an optical fiber or spectrometer slit. Moreover, this effort is complicated by the fact that the DMD acts as a diffractive element, which causes severe spectral inhomogeneities in the light collection. We studied the effect of light diffraction via a whiskbroom hyperspectral camera in a broad spectral range. Based on the knowledge, we designed a variety of different approaches to light collection. We mapped the efficiency and spectral homogeneity of each of the configuration - namely its ability to couple the light into commercially available fiber spectrometers working in the visible and IR range (up to 2500 nm). We found the integrating spheres to provide homogeneous light collection, which, however, suffers from very low efficiency. The best compromise between the performance parameters was provided by a combination of an engineered diffuser with an off-axis parabolic mirror. We used this configuration to create a computational microscope able to carry out hyperspectral imaging of a sample in a broad spectral range (400-2500 nm). We see such a setup as an ideal tool to carry out spectrally-resolved transmission microscopy in a broad spectral range.
Category O over a deformation of the symplectic oscillator algebra
Creators: name: Khare, Apoorva
Publisher: name: arXiv
Year: 2003
Subjects: subject: Representation Theory (math.RT)
subject: Quantum Algebra (math.QA)
subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 16D90 (Primary) 16S30, 17B10 (Secondary)

description: We discuss the representation theory of $H_f$, which is a deformation of the symplectic oscillator algebra $sp(2n) \ltimes h_n$, where $h_n$ is the ((2n+1)-dimensional) Heisenberg algebra. We first look at a more general setup, involving an algebra with a triangular decomposition. Assuming the PBW theorem, and one other hypothesis, we show that the BGG category $\mathcal{O}$ is abelian, finite length, and self-dual. We decompose $\mathcal{O}$ as a direct sum of blocks $\calo(\la)$, and show that each block is a highest weight category. In the second part, we focus on the case $H_f$ for $n=1$, where we prove all these assumptions, as well as the PBW theorem.
description: 42 pages, LaTeX, 11pt; Typos removed, references added, presentation improved, minor corrections and additions, Section 16 modified, and Standing Assumption added in Section 17; Final form, to appear in the Journal of Pure and Applied Algebra
Entropic uncertainty relations and entanglement
Creators: name: Guehne, Otfried
name: Lewenstein, Maciej
Publisher: name: arXiv
Year: 2004
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We discuss the relationship between entropic uncertainty relations and entanglement. We present two methods for deriving separability criteria in terms of entropic uncertainty relations. Especially we show how any entropic uncertainty relation on one part of the system results in a separability condition on the composite system. We investigate the resulting criteria using the Tsallis entropy for two and three qubits.
description: 8 pages, 3 figures, v2: small changes
Numerical solutions for a class of singular boundary value problems arising in the theory of epitaxial growth
Creators: name: Verma, Amit Kumar
name: Pandit, Biswajit
name: Escudero, Carlos
Publisher: name: arXiv
Year: 2019
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 34B16

description: The existence of numerical solutions to a fourth order singular boundary value problem arising in the theory of epitaxial growth is studied. An iterative numerical method is applied on a second order nonlinear singular boundary value problem which is the exact result of the reduction of this fourth order singular boundary value problem. It turns out that the existence or nonexistence of numerical solutions fully depends on the value of a parameter. We show that numerical solutions exist for small positive values of this parameter. For large positive values of the parameter, we find nonexistence of solutions. We also observe existence of solutions for negative values of the parameter and determine the range of parameter values which separates existence and nonexistence of solutions. This parameter has a clear physical meaning as it describes the rate at which new material is deposited onto the system. This fact allows us to interpret the physical significance of our results.
description: 18 pages, 30 figures, 12 tables
The Natural Orchestra : Soundscape Approach to Conservation
Creators: name: Basri, Nabil Hakim
Publisher: name: The University of British Columbia
Year: 2024

description: The Natural Orchestra harmonizes biological, geophysical, and human sounds. Theses sounds form the soundscape, a tool reflecting ecosystem health. Like ecological systems, it thrives on balance, symbolizing ecological stewardship. In Ujung Kulon National Park, vital for the critically endangered Javan Rhino, this harmony holds deep significance. The park’s biodiversity and cultural richness underscore the importance of collective responsibility. By fostering connections between culture, environment, and conservation, The Natural Orchestra becomes a beacon for preserving Earth’s treasures. It echoes nature’s resilience in a melody of conservation.
Effects of High Intensity Ultrasound on BSCCO-2212 Superconductor
Creators: name: Prozorov, Tanya
name: McCarty, Brett
name: Cai, Zhihua
name: Prozorov, Ruslan
name: Suslick, Kenneth S.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Slurries of powdered Bi2Sr2CaCu2O8+x superconductor in low volatility alkanes were treated with intense ultrasound. Significant enhancements of magnetic irreversibility as well as transport critical current are reported. The effects are dependent on the concentration of the slurry and are optimal for 1.5% wt. slurry loading. Electron microscopy shows that ultrasonic treatment leads to a change in grain morphology and intergrain welding. The observed enhancement of superconducting properties is consistent with the limitations in critical currents in BSCCO superconductor being due to intergrain coupling rather than intragrain pinning strength.
description: 3 pages
Hinge Modes and Surface States in Second-Order Topological Three-Dimensional Quantum Hall Systems induced by Charge Density Modulation
Creators: name: Szumniak, Paweł
name: Loss, Daniel
name: Klinovaja, Jelena
Publisher: name: arXiv
Year: 2019
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We consider a system of weakly coupled one-dimensional wires forming a three-dimensional stack in the presence of a spatially periodic modulation of the chemical potential along the wires, equivalent to a charge density wave (CDW). An external static magnetic field is applied parallel to the wire axes. We show that, for a certain parameter regime, due to interplay between the CDW and magnetic field, the system can support a second-order topological phase characterized by the presence of chiral quasi-1D Quantum Hall Effect (QHE) hinge modes. Interestingly, we demonstrate that direction of propagation of the hinge modes depends on the phase of the CDW and can be reversed only by electrical means without the need of changing the orientation of the magnetic field. Furthermore, we show that the system can also support 2D chiral surface QHE states, which can coexist with one-dimensional hinge modes, realizing a scenario of a hybrid high-order topology. We show that the hinge modes are robust against static disorder.