cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Hylenaea praecelsa A. C. Sm.
Creators: name: Coughenour, Jennifer M.
name: Simmons, Mark P.
name: Lombardi, Julio A.
name: Yakobson, Kendra
name: Archer, Robert H.
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Celastrales
Celastraceae
Hylenaea
Hylenaea praecelsa

description: Hylenaea praecelsa (Miers) A.C.Sm. — R. Foster 897, Panama (MO); 26S rDNA HM230083, ITS rDNA HM230130, matK HM230175, trnL intron HM230221
description: Published as part of Coughenour, Jennifer M., Simmons, Mark P., Lombardi, Julio A., Yakobson, Kendra & Archer, Robert H., 2011, Phylogeny of Celastraceae subfamily Hippocrateoideae inferred from morphological characters and nuclear and plastid loci, pp. 320-330 in Molecular Phylogenetics and Evolution 59 (2) on page 327, DOI: 10.1016/j.ympev.2011.02.017, http://zenodo.org/record/5155694
General Bounds on Holographic Complexity
Creators: name: Engelhardt, Netta
name: Folkestad, Åsmund
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We prove a positive volume theorem for asymptotically AdS spacetimes: the maximal volume slice has nonnegative vacuum-subtracted volume, and the vacuum-subtracted volume vanishes if and only if the spacetime is identically pure AdS. Under the Complexity=Volume proposal, this constitutes a positive holographic complexity theorem. The result features a number of parallels with the positive energy theorem, including the assumption of an energy condition that excludes false vacuum decay (the AdS weak energy condition). Our proof is rigorously established in broad generality in four bulk dimensions, and we provide strong evidence in favor of a generalization to arbitrary dimensions. Our techniques also yield a holographic proof of Lloyd's bound for a class of bulk spacetimes. We further establish a partial rigidity result for wormholes: wormholes with a given throat size are more complex than AdS-Schwarzschild with the same throat size.
description: 47 pages, 8 figures
Loeseneriella rowlandii N. Halle
Creators: name: Coughenour, Jennifer M.
name: Simmons, Mark P.
name: Lombardi, Julio A.
name: Yakobson, Kendra
name: Archer, Robert H.
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Celastrales
Celastraceae
Loeseneriella
Loeseneriella rowlandii

description: ; Loeseneriella rowlandii (Loes.) N.Hallé — D.K. Harder et al. 2980, Ghana (MO); 26S rDNA HM230084, ITS rDNA HM230131, matK HM230176, trnL intron HM230222, trnL-F spacer HM230266
description: Published as part of Coughenour, Jennifer M., Simmons, Mark P., Lombardi, Julio A., Yakobson, Kendra & Archer, Robert H., 2011, Phylogeny of Celastraceae subfamily Hippocrateoideae inferred from morphological characters and nuclear and plastid loci, pp. 320-330 in Molecular Phylogenetics and Evolution 59 (2) on page 327, DOI: 10.1016/j.ympev.2011.02.017, http://zenodo.org/record/5155694
Black holes without boundaries
Creators: name: Nielsen, Alex B.
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We discuss some of the drawbacks of using event horizons to define black holes and suggest ways in which black holes can be described without event horizons, using trapping horizons. We show that these trapping horizons give rise to thermodynamic behavior and possibly Hawking radiation too. This raises the issue of whether the event horizon or the trapping horizon should be seen as the true boundary of a black hole. This difference is important if we believe that quantum gravity will resolve the central singularity of the black hole and clarifies several of the issues associated with black hole thermodynamics and information loss.
description: 8 pages. Invited essay for special edition of the International Journal of Modern Physics D
An Effective Non-Autoregressive Model for Spoken Language Understanding
Creators: name: Cheng, Lizhi
name: Jia, Weijia
name: Yang, Wenmian
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computation and Language (cs.CL)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Spoken Language Understanding (SLU), a core component of the task-oriented dialogue system, expects a shorter inference latency due to the impatience of humans. Non-autoregressive SLU models clearly increase the inference speed but suffer uncoordinated-slot problems caused by the lack of sequential dependency information among each slot chunk. To gap this shortcoming, in this paper, we propose a novel non-autoregressive SLU model named Layered-Refine Transformer, which contains a Slot Label Generation (SLG) task and a Layered Refine Mechanism (LRM). SLG is defined as generating the next slot label with the token sequence and generated slot labels. With SLG, the non-autoregressive model can efficiently obtain dependency information during training and spend no extra time in inference. LRM predicts the preliminary SLU results from Transformer's middle states and utilizes them to guide the final prediction. Experiments on two public datasets indicate that our model significantly improves SLU performance (1.5\% on Overall accuracy) while substantially speed up (more than 10 times) the inference process over the state-of-the-art baseline.
Predictions for anisotropic X-ray signatures in the circumgalactic medium: imprints of supermassive black hole driven outflows
Creators: name: Truong, Nhut
name: Pillepich, Annalisa
name: Nelson, Dylan
name: Werner, Norbert
name: Hernquist, Lars
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The circumgalactic medium (CGM) encodes signatures of the galaxy-formation process, including the interaction of galactic outflows driven by stellar and supermassive black hole (SMBH) feedback with the gaseous halo. Moving beyond spherically symmetric radial profiles, we study the \textit{angular} dependence of CGM properties around $z=0$ massive galaxies in the IllustrisTNG simulations. We characterize the angular signal of density, temperature, and metallicity of the CGM as a function of galaxy stellar mass, halo mass, distance, and SMBH mass, via stacking. TNG predicts that the CGM is anisotropic in its thermodynamical properties and chemical content over a large mass range, $M_*\sim10^{10-11.5}M_\odot$. Along the minor axis directions, gas density is diluted, whereas temperature and metallicity are enhanced. These feedback-induced anisotropies in the CGM have a magnitude of $0.1-0.3$ dex, extend out to the halo virial radius, and peak at Milky Way-like masses, $M_*\sim10^{10.8}M_\odot$. In TNG, this mass scale corresponds to the onset of efficient SMBH feedback and the production of strong outflows. By comparing the anisotropic signals predicted by TNG versus other simulations -- Illustris and EAGLE -- we find that each simulation produces distinct signatures and mass dependencies, implying that this phenomenon is sensitive to the underlying physical models. Finally, we explore X-ray emission as an observable of this CGM anistropy, finding that future X-ray observations, including the eROSITA all-sky survey, will be able to detect and characterize this signal, particularly in terms of an angular modulation of the X-ray hardness.
description: 19 pages, 9 figures + Appendix. Accepted for publication in MNRAS
f-Sum Rule and Unconventional Spectral Weight Transfer in Graphene
Creators: name: Sabio, J.
name: Nilsson, J.
name: Neto, A. H. Castro
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We derive and analyze the f-sum rule for a two-dimensional (2D) system of interacting electrons whose behavior is described by the Dirac equation. We apply the sum rule to analyze the spectral weight transfer in graphene within different approximations discussed in the literature. We find that the sum rule is generically dominated by inter-band transitions while other excitations produce sub-leading behavior. The f-sum rule provides strong constraints for theories of interacting electrons in graphene.
description: 10 pages, 3 figures; typos corrected, references added
Rapid methods for assessing surface cleanliness within the food industry: their evaluation, design and comparison to traditional techniques
Creators: name: Moore, Ginny
Publisher: name: Cardiff Metropolitan University
Year: 2022
Subjects: Food sciences not elsewhere classified

description: The cleanliness of the processing environment is an important factor in both assuring food quality and protecting the consumer from pathogens, consequently, food businesses should continually assess surface cleanliness in order that any problems associated with the 'cleaning' process can be identified and rectified rapidly. There is, however, widespread confusion regarding why, when and how cleanliness assessment should be carried out and, thus, a need to provide the food industry with guidance.
 Laboratory and field studies were conducted in order to evaluate the performance characteristics of both microbiological and chemical-based cleanliness assessment methods. Limits of detection were determined together with factors affecting test efficacy and associated advantages, drawbacks and limitations.
 The mechanical energy generated during sampling, the absorbency of the bud material and the swab-wetting solution used, all contributed to the efficacy of the traditional swabbing procedure. Overall however, it was the ease with which bacteria could be released from the bud that had the greatest effect and omitting this step via the use of dipslides increased the sensitivity of microbiological assessment. The benefits of using alternative microbiological techniques have also been highlighted, and a novel, swab-based, enzymatic method capable, in just 5 h, of detecting the presence of < I coliform colony cm2 has been developed.
 Unlike microbiological techniques, surface dryness had little effect upon the performance of non-microbiological test methods, yet, other factors, including the universality of the component residue being tested for and its intrinsic level within the food debris, did influence the results obtained, demonstrating that choice of method must depend upon the type of food produced. Results also identified key sectors of the food industry for which appropriate test methodology is currently lacking. To fulfil such requirements, an assay for use within high-fat processing environments has also been developed.
 Taken collectively, the results demonstrate that given the variability in food debris and surface contamination, no one method is ideal for assessing cleanliness and rather than being interchangeable, test methods should be used in combination. An integrated cleaning assessment strategy has been devised and its implementation should enable food businesses to ensure their cleaning and disinfection procedures are effective and that the food produced is safe and of the highest quality.
Activity-dependent stochastic resonance in recurrent neuronal networks
Creators: name: Volman, Vladislav
name: Levine, Herbert
Publisher: name: arXiv
Year: 2008
Subjects: subject: Neurons and Cognition (q-bio.NC)
subject: Populations and Evolution (q-bio.PE)
subject: FOS: Biological sciences

description: We use a biophysical model of a local neuronal circuit to study the implications of synaptic plasticity for the detection of weak sensory stimuli. Networks with fast plastic coupling show behavior consistent with stochastic resonance. Addition of an additional slow coupling that accounts for the asynchronous release of neurotransmitter results in qualitatively different properties of signal detection, and also leads to the appearance of transient post-stimulus bistability. Our results suggest testable hypothesis with regard to the self-organization and dynamics of local neuronal circuits.
description: 4 pages, 4 figures, published in Physical Review E
Tight Correlation-Function Bell Inequality for Multipartite $d$-Dimensional System
Creators: name: Chen, Jing-Ling
name: Deng, Dong-Ling
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We generalize the correlation functions of the Clauser-Horne-Shimony-Holt (CHSH) inequality to multipartite d-dimensional systems. All the Bell inequalities based on this generalization take the same simple form as the CHSH inequality. For small systems, numerical results show that the new inequalities are tight and we believe this is also valid for higher dimensional systems. Moreover, the new inequalities are relevant to the previous ones and for bipartite system, our inequality is equivalent to the Collins-Gisin-Linden-Masser-Popescu (CGLMP) inequality.
description: 4 pages; Accepted by PRA
Dynamical response to supernova-induced gas removal in spiral galaxies with dark matter halo
Creators: name: Koyama, Hiroko
name: Nagashima, Masahiro
name: Kakehata, Takayuki
name: Yoshii, Yuzuru
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We investigate the dynamical response, in terms of disc size and rotation velocity, to mass loss by supernovae in the evolution of spiral galaxies. A thin baryonic disc having the Kuzmin density profile embedded in a spherical dark matter halo having a density profile proposed by Navarro, Frenk & White is considered. For a purpose of comparison, we also consider the homogeneous and $r^{-1}$ profiles for dark matter in a truncated spherical halo. Assuming for simplicity that the dark matter distribution is not affected by mass loss from discs and the change of baryonic disc matter distribution is homologous, we evaluate the effects of dynamical response in the resulting discs. We found that the dynamical response only for an adiabatic approximation of mass loss can simultaneously account for the rotation velocity and disc size as observed particularly in dwarf spiral galaxies, thus reproducing the Tully-Fisher relation and the size versus magnitude relation over the full range of magnitude. Furthermore, we found that the mean specific angular momentum in discs after the mass loss becomes larger than that before the mass loss, suggesting that the mass loss would occur most likely from the central disc region where the specific angular momentum is low.
description: 15 pages, 11 figures, final version for publication in MNRAS
Heisenberg's uncertainty principle for simultaneous measurement of positive-operator-valued measures
Creators: name: Miyadera, Takayuki
name: Imai, Hideki
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A limitation on simultaneous measurement of two arbitrary positive operator valued measures is discussed. In general, simultaneous measurement of two noncommutative observables is only approximately possible. Following Werner's formulation, we introduce a distance between observables to quantify an accuracy of measurement. We derive an inequality that relates the achievable accuracy with noncommutativity between two observables. As a byproduct a necessary condition for two positive operator valued measures to be simultaneously measurable is obtained.
description: 7 pages, 1 figure. To appear in Phys. Rev. A
Superconductivity induced by oxygen deficiency in Sr-doped LaOFeAs
Creators: name: Wu, G.
name: Chen, H.
name: Xie, Y. L.
name: Yan, Y. J.
name: Wu, T.
name: Liu, R. H.
name: Wang, X. F.
name: Fang, D. F.
name: Ying, J. J.
name: Chen, X. H.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We synthesized Sr-doped $La_{0.85}Sr_{0.15}OFeAs$ sample with single phase, and systematically studied the effect of oxygen deficiency in the Sr-doped LaOFeAs system. It is found that substitution of Sr for La indeed induces the hole carrier evidenced by positive thermoelectric power (TEP), but no bulk superconductivity is observed. The superconductivity can be realized by annealing the as-grown sample in vacuum to produce the oxygen deficiency. With increasing the oxygen deficiency, the superconducting transition temperature ($T_c$) increases and maximum $T_c$ reaches about 26 K the same as that in La(O,F)FeAs. TEP dramatically changes from positive to negative in the nonsuperconducting as-grown sample to the superconducting samples with oxygen deficiency. While $R_H$ is always negative for all samples (even for Sr-doped as grown sample). It suggests that the $La_{0.85}Sr_{0.15}O_{1-δ}FeAs$ is still electron-type superconductor.
description: 4 pages, 4 figures
Atomic coordinates of water adsorption in C2N and its reference C3H
Creators: name: Heske, Julian
name: Kühne, Thomas D.
Publisher: name: Zenodo
Year: 2021

description: These files contain the atomic coordinates of molecular H2O adsorption in an idealized carbon nitride material called C2N (H2O_at_C2N.xyz) as well as a corresponding nitrogen-free reference materials (H2O_at_C3H.xyz). The coordinates are given in XYZ format. Cell parameters: ABCαβγ = 16.8 16.8 13.2 90 90 60.
Street women and their verbal transactions : some aspects of the oral culture of female prostitute drug addicts
Creators: name: Layton, Monique Jacqueline Berthe
Publisher: name: University of British Columbia
Year: 2010

description: This study attempts to describe, through the combination of an interactional framework, an ethnographic semantic approach and an analysis of the folklore, the oral culture of female prostitute drug addicts and the forms of verbal exchange through which they appear to exercise some control over their socio-economic environment. The verbal transactions examined take place on and off the street, but always involve "street" participants: people whose business is on the street, where they casually meet friends and foes, where they make the initial contacts and contracts which lead to further transactions, and where they report finding an excitement and a pace of life they enjoy. Many of these transactions are described as "bullshitting": the flexibility of meaning of this term enables us to use it to indicate a variety of verbal exchanges among street people on the one hand, and between street people and "square Johns" on the other. In the first instance, it covers amicable greetings, small talk, anecdotes, gossip, jokes, warnings: didactic narratives and manipulative exercises whose function is to a large extent one of socialization. They serve as a stern description of the rules of behaviour among members of the street group and as means of integrating newcomers to the subculture of the street by describing the contrasting characteristics of "straight" and "street" culture members. In the second instance, speech acts serve mostly as an instrument of manipulation and exploitation. The most developed type of transaction examined is the one taking place between prostitutes and their customers, and the strategies developed to cope with problematic cases. The informants are also considered as drug addicts involved in non-prostitutional though exploitative transactions. As incarcerated informants, they are further involved in "interview transactions" based on firmly defined cultural boundaries between straight and street participants. The informants' perception of the two groups' contrasting worldviews, their lifestyles and opposite characteristics and attributes, give rise to the creation of endo- and exo-stereotypes which reinforce principles of inclusion and exclusion and regulate the pattern of straight and street interaction. Verbal transactions reflect the informants' understanding of their socio-economic environment, where economic survival rests on a profitable interaction with outsiders, and social survival rests on a cohesive interaction among themselves.
Anyons from fermions with conventional two-body interactions
Creators: name: Yu, Yue
name: Li, Yi
Publisher: name: arXiv
Year: 2008
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Emergent anyons are the key elements of the topological quantum computation and topological quantum memory. We study a two-component fermion model with conventional two-body interaction in an open boundary condition and show that several subsets in the low-lying excitations obey the same fusion rules as those of the toric code model. Those string-like non-local excitations in a given subset obey mutual semionic statistics. We show how to peel off one of such subset from other degenerate subsets and manipulate anyons in cold dipolar Fermi atoms or cold dipolar fermionic heteronuclear molecules in optical lattices by means of the established techniques.
description: 10 pages,3 figures, the contents of mapping to honeycomb lattice are removed and will be published separately
Functioning of the dimeric GABA(B) receptor extracellular domain revealed by glycan wedge scanning
Creators: name: Rondard, Philippe
name: Huang, Siluo
name: Monnier, Carine
name: Tu, Haijun
name: Blanchard, Bertrand
name: Oueslati, Nadia
name: Malhaire, Fanny
name: Li, Ying
name: Trinquet, Eric
name: Labesse, Gilles
name: Pin, Jean-Philippe
name: Liu, Jianfeng
Publisher: name: arXiv
Year: 2008
Subjects: subject: Neurons and Cognition (q-bio.NC)
subject: Biomolecules (q-bio.BM)
subject: FOS: Biological sciences

description: The G-protein-coupled receptor (GPCR) activated by the neurotransmitter GABA is made up of two subunits, GABA(B1) and GABA(B2). GABA(B1) binds agonists, whereas GABA(B2) is required for trafficking GABA(B1) to the cell surface, increasing agonist affinity to GABA(B1), and activating associated G proteins. These subunits each comprise two domains, a Venus flytrap domain (VFT) and a heptahelical transmembrane domain (7TM). How agonist binding to the GABA(B1) VFT leads to GABA(B2) 7TM activation remains unknown. Here, we used a glycan wedge scanning approach to investigate how the GABA(B) VFT dimer controls receptor activity. We first identified the dimerization interface using a bioinformatics approach and then showed that introducing an N-glycan at this interface prevents the association of the two subunits and abolishes all activities of GABA(B2), including agonist activation of the G protein. We also identified a second region in the VFT where insertion of an N-glycan does not prevent dimerization, but blocks agonist activation of the receptor. These data provide new insight into the function of this prototypical GPCR and demonstrate that a change in the dimerization interface is required for receptor activation.
title: Front Matter, Table of Contents, Preface, Conference Organization
Creators: name: Queirós, Ricardo
name: Pinto, Mário
name: Simões, Alberto
name: Portela, Filipe
name: Pereira, Maria João
Publisher: name: Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Year: 2021
Subjects: subject: Front Matter
subject: Table of Contents
subject: Preface
subject: Conference Organization
subject: Theory of computation → Formal languages and automata theory
subject: Information systems → Data management systems
subject: Information systems → World Wide Web
subject: Computing methodologies → Natural language processing

description: Front Matter, Table of Contents, Preface, Conference Organization
description: OASIcs, Vol. 94, 10th Symposium on Languages, Applications and Technologies (SLATE 2021), pages 0:i-0:xvi
Studies in utility theory
Creators: name: Larsson, Stig Owe
Publisher: name: University of British Columbia
Year: 2010

description: Since vonNeumann and Morgenstern made their contributions, the expected utility criterion (EUC) has been the most accepted criterion in decision theory. Following their axiomatic approach justifying EUC, several other studies have been made suggesting the same criterion but under slightly different axiomatic systems. However, critics have found several simple decision problems (called paradoxes) which seem to contradict the conclusions of EUC; that is, the paradoxes contradict one or more of the axioms made to support EUC. The criticisms are based on empirical studies made in regard to the paradoxes. It is not always obvious, however, which axiom(s) is not accepted, since each approach to EUC gives a set of sufficient rather than necessary assumptions for EUC to hold. In Part I of the thesis a set of axioms which are necessary for EUC to hold is specified. Each of these axioms contains a basic assumption of a decision maker's behaviour. Therefore by considering the paradoxes in terms of these axioms, a better understanding is obtained with regard to which properties of EUC seem to be contradicted by the paradoxes. The conclusion of this study shows that most people contradict EUC because it does not differentiate between a "known" risk and an "unknown" risk. In Knight's terminology, there is a distinction between decision making under risk and uncertainty. Most empirical studies show that these differences are of such substantial proportions that there is a questionable justification for using the expected utility criterion for decision making under uncertainty. Although many alternatives to EUC for decision making under uncertainty exist, there are very few criteria for decision problems which fall between risk and uncertainty, that is, partial risk problems. Those existing are of an ad hoc nature. As a normative theory the EUC is far superior to any of these criteria in spite of its lack of distinction between risk and uncertainty. In the second part of the thesis an alternative normative criterion is suggested for decision making under partial risk and uncertainty. As an extension of EUC, this criterion distinguishes between risk and uncertainty. This theory expands on Ellsberg's suggestion that "ambiguity" influences one's preference among a set of alternatives. In this extension a more precise definition of "ambiguity" is needed and one is suggested here as a relation on the inner and outer measure of an event. The extension of EUC is then obtained by considering a more general set function, termed P-measure, which would depend on a set's ambiguity rather than a probability measure on the sets of rewards. It is concluded by an axiomatic development that the P-measure must be a non-negative mono-tonic set function which is not necessarily additive. It is also shown that the standard paradoxes related to paradoxes based on "known" versus "unknown" probabilities may be explained by this method and would therefore suggest an alternative to EUC for decision making under partial risk and uncertainty.
Abbiamo sostituito la pulsione viscerale con il simbolo, e il simbolo con la manipolazione
Creators: name: PsykoSapiens
Publisher: name: Zenodo
Year: 2025

description: Il taccuino indaga il progressivo allontanamento dell’essere umano dalla sua natura pulsionale per affidarsi al simbolo, un costrutto che, da strumento di connessione con il reale, si è trasformato in mezzo di manipolazione e controllo. Attraverso un’analisi critica, si esplorano il tradimento della percezione autentica, l’involuzione del simbolo e il suo ruolo nella costruzione di una realtà mediata e falsificata.

L’opera affronta il tema della soppressione del sentire viscerale, un’intelligenza pre-riflessiva e biologica che precede il linguaggio e che è stata sacrificata in favore di un sistema simbolico che impone significati e separa l’uomo dalla propria origine corporea. Si evidenzia come il simbolo, nato come ponte tra l’individuo e il mondo, sia divenuto una prigione, funzionale alla propaganda, alla manipolazione dei desideri e al controllo sociale.

Viene poi affrontata la connessione tra il simbolo e la violenza giovanile urbana, considerata una manifestazione di frustrazione e perdita di autenticità. Il simbolo non solo genera illusioni, ma fomenta disconnessione e aggressività, dando vita a un ciclo di sofferenza perpetua.

Infine, il testo propone la morte come dissoluzione del simbolo, non come fine biologica, ma come superamento della rappresentazione artificiale di realtà. Solo attraverso la riscoperta dell’intuizione e del sentire viscerale si può riacquistare una forma di esistenza più autentica, al di là delle costruzioni imposte. La conclusione è un invito alla riflessione radicale: il ritorno alla percezione originaria è l’unica possibilità di emancipazione dall’inganno simbolico.
Formation and accretion history of terrestrial planets from runaway growth through to late time: implications for orbital eccentricity
Creators: name: Morishima, Ryuji
name: Schmidt, Max W.
name: Stadel, Joachim
name: Moore, Ben
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Remnant planetesimals might have played an important role in reducing the orbital eccentricities of the terrestrial planets after their formation via giant impacts. However, the population and the size distribution of remnant planetesimals during and after the giant impact stage are unknown, because simulations of planetary accretion in the runaway growth and giant impact stages have been conducted independently. Here we report results of direct N-body simulations of the formation of terrestrial planets beginning with a compact planetesimal disk. The initial planetesimal disk has a total mass and angular momentum as observed for the terrestrial planets, and we vary the width (0.3 and 0.5AU) and the number of planetesimals (1000-5000). This initial configuration generally gives rise to three final planets of similar size, and sometimes a fourth small planet forms near the location of Mars. Since a sufficient number of planetesimals remains, even after the giant impact phase, the final orbital eccentricities are as small as those of the Earth and Venus.
description: 36 pages, 9 figures, 1 table, Accepted in ApJ
Molecular determinants involved in the allosteric control of agonist affinity in the GABAB receptor by the GABAB2 subunit
Creators: name: Liu, Jianfeng
name: Maurel, Damien
name: Etzol, Sébastien
name: Brabet, Isabelle
name: Ansanay, Hervé
name: Pin, Jean-Philippe
name: Rondard, Philippe
Publisher: name: arXiv
Year: 2008
Subjects: subject: Biomolecules (q-bio.BM)
subject: Neurons and Cognition (q-bio.NC)
subject: FOS: Biological sciences

description: The gamma-aminobutyric acid type B (GABAB) receptor is an allosteric complex made of two subunits, GABAB1 (GB1) and GABAB2 (GB2). Both subunits are composed of an extracellular Venus flytrap domain (VFT) and a heptahelical domain (HD). GB1 binds GABA, and GB2 plays a major role in G-protein activation as well as in the high agonist affinity state of GB1. How agonist affinity in GB1 is regulated in the receptor remains unknown. Here, we demonstrate that GB2 VFT is a major molecular determinant involved in this control. We show that isolated versions of GB1 and GB2 VFTs in the absence of the HD and C-terminal tail can form hetero-oligomers as shown by time-resolved fluorescence resonance energy transfer (based on HTRF technology). GB2 VFT and its association with GB1 VFT controlled agonist affinity in GB1 in two ways. First, GB2 VFT exerted a direct action on GB1 VFT, as it slightly increased agonist affinity in isolated GB1 VFT. Second and most importantly, GB2 VFT prevented inhibitory interaction between the two main domains (VFT and HD) of GB1. According to this model, we propose that GB1 HD prevents the possible natural closure of GB1 VFT. In contrast, GB2 VFT facilitates this closure. Finally, such inhibitory contacts between HD and VFT in GB1 could be similar to those important to maintain the inactive state of the receptor.
Towards diagrammatic hypermedia authoring: cognition and usability issues in higher education
Creators: name: Elliott, Geoff
Publisher: name: Cardiff Metropolitan University
Year: 2022
Subjects: Higher education

description: Lack of skill, time and institutional support are widely cited as obstacles to the development of educational-hypermedia by higher education staff. The problem is how can computer-based tools be made accessible to teachers/academics but at the same time remain sufficiently expressive to produce educationally-effective hypermedia? In this study, human-computer interaction issues relating to the authoring of hypermedia by academics are examined and a range of authoring programs evaluated for their suitability. The main experimental hypothesis of the study was that a diagram-based hypermedia authoring program would help to mitigate against the skills deficit in that it would be very easy to use and hence enable academics with relatively low computer skills to develop hypermedia. The investigation involved a number of research activities including: trials of a diagram-based and a book-based authoring program using sixteen subjects; the development of a full application for use in a higher education teaching scenario; and an evaluation of a number of other representative authoring programs by a focus group of experts in IT training. Analysis of both quantitative and qualitative data indicated that diagram-based authoring programs have significant advantages over existing authoring programs for people with lower computer skills, although this was compounded by spatial relations ability. The main contribution of this study is a causal model of learnability of hypermedia authoring programs derived from the analysis of the empirical data. The model incorporates a number of factors, some already noted in other studies, some identified in this study. The causal model of learnability extends contemporary views of learnability and usability and is underpinned by contemporary learning theories. The main conclusion of the study is that new authoring programs designed for use in higher education should take into account the model of learnability, be based on an accessible diagramming technique such as concept maps for knowledge construction and be integrated with a visual development language that allows the passive hypermedia-knowledge to be supplemented with educationally-effective functionality.
A direct road to Majorana fields
Creators: name: Aste, Andreas
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: A concise discussion of spin-1/2 field equations with a special focus on Majorana spinors is presented. The Majorana formalism which describes massive neutral fermions by the help of two-component or four-component spinors is of fundamental importance for the understanding of mathematical aspects of supersymmetric and other extensions of the Standard Model of particle physics, which may play an increasingly important role at the beginning of the LHC era. The interplay between the two-component and the four-component formalism is highlighted in an introductory way. Majorana particles are predicted both by grand unified theories, in which these particles are neutrinos, and by supersymmetric theories, in which they are photinos, gluinos and other states.
description: 30 pages, LATEX, one section expanded and references added
Jet collision with accreting tori around SMBHs. GRHD and light surfaces constraints in aggregates of misaligned tori
Creators: name: Pugliese, D.
name: Stuchlik, Z.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We explore the possibility of jet collisions with accreting tori orbiting around SMBHs. The analysis provides constraints on formation and the observational evidences of the host configurations. We use a GRHD model, investigating the light surfaces contraints in aggregates of misaligned tori orbiting a central static Schwarzschild black hole. Each (toroidal) configuration of the agglomeration is a geometrically thick, pressure supported, perfect fluid torus. Aggregates include proto-jets, the open cusped solutions associated to the geometrically thick tori. Collision emergence and the stability properties of the aggregates are considered at different inclination angles relative to a fixed distant observer. We relate the constraints to the relevant frequencies of the configurations and fluid specific angular momentum, separating the constraints related to the fluids hydrodynamics and to the geometric backgrounds. We analyze existence of accreting tori supporting jet-emission. We discuss the existence of orbit-replicas that could host shadowing effects in replicas of the emissions in two regions, close and far from the BH (horizon replicas in jet shells). The investigation clarifies the role of the pressure gradients of the orbiting matter and the essential role of the radial gradient of the pressure in the determination of the disk verticality. Finally we analyze the possibility that a toroidal magnetic field could be related to the collimation of proto-jets.
description: 30 pages; 23 figure multipanels; to appear in PASJ
Bank asset and liability management
Creators: name: Kusy, Martin
Publisher: name: University of British Columbia
Year: 2010

description: The inherent uncertainty of a bank's cash flows, cost of funds and return on investment, along with the increased variability of economic conditions during the past decade, have emphasized the need for greater efficiency in the management of a bank's assets and liabilities. A consequence has been an increased number of studies on how to structure a bank's assets and liabilities so that an "optimal" trade-off exists between risk, return and liquidity. Except for the Bradley and Crane (BC) model, the solution techniques proposed in the literature are computationally tractable only if uncertainty is ignored. Unfortunately, the BC model is not operationally appealing due to severe computational limitations, and a number of undesirable formulation features (such as the restricted feasible region for first period decisions). Given these deficiencies in the literature, the purposes of this dissertation are to develop an asset and liability management model (ALM) that is computationally tractable for large realistic problems and to demonstrate that this model is superior to existing models. The ALM model developed in this dissertation is a stochastic linear program with simple recourse (SLPR). This model incorporates the following essential features of asset and liability management: 1) the stochastic nature of the problem (by utilizing a set of random cash flows (deposits) with a given discrete probability distribution), 2) simultaneous consideration of assets and liabilities, 3) transactions costs, and 4) multi-periodicity. The ALM model was applied to Vancouver City Savings Credit Union's asset and liability management for a five year planning period in order to demonstrate the effort necessary to implement the model. Computational tractability for this large problem was maintained by using Wets' algorithm for solving SLPR. A simulation was run on a real (uncertain) environment to compare the decision making effectiveness of the solutions generated by the SLPR and stochastic dynamic programming (SDP) models. The findings of this dissertation are: 1) the ALM model is superior to an equivalent deterministic model, 2) the solution of the ALM model is sensitive to the asymmetry of the probability distributions of the cash flows, 3) the effort required for the implementation of the ALM model is comparable to that of an equivalent deterministic model, 4) the SLPR formulation is computationally superior to the SDP formulation utilized by Bradley and Crane, and 5) the simulation indicates that the SLPR formulation results in a better initial period decision than the SDP formulation (this is due to the restrictions imposed by the SDP formulation of maintaining feasibility for all possible forecasted economic scenarios for the first period decision).
Far-Ultraviolet Spectra of Main-Sequence O Stars at Extremely Low Metallicity
Creators: name: Telford, O. Grace
name: Chisholm, John
name: McQuinn, Kristen B. W.
name: Berg, Danielle A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Metal-poor massive stars dominate the light we observe from star-forming dwarf galaxies and may have produced the bulk of energetic photons that reionized the universe at high redshift. Yet, the rarity of observations of individual O stars below the $20\%$ solar metallicity ($Z_\odot$) of the Small Magellanic Cloud (SMC) hampers our ability to model the ionizing fluxes of metal-poor stellar populations. We present new Hubble Space Telescope far-ultraviolet (FUV) spectra of three O-dwarf stars in the galaxies Leo P ($3\%\,Z_\odot$), Sextans A ($6\%\,Z_\odot$), and WLM ($14\%\,Z_\odot$). We quantify equivalent widths of photospheric metal lines and strengths of wind-sensitive features, confirming that both correlate with metallicity. We infer the stars' fundamental properties by modeling their FUV through near-infrared spectral energy distributions and identify stars in the SMC with similar properties to each of our targets. Comparing to the FUV spectra of the SMC analogs suggests that (1) the star in WLM has an SMC-like metallicity, and (2) the most metal-poor star in Leo P is driving a much weaker stellar wind than its SMC counterparts. We measure projected rotation speeds and find that the two most metal-poor stars have high $v \,\mathrm{sin}(i)\,\geq\,290\,\mathrm{km}\,\mathrm{s}^{-1}$, and estimate just a $3-6\%$ probability of finding two fast rotators if the metal-poor stars are drawn from the same $v \,\mathrm{sin}(i)$ distribution observed for O dwarfs in the SMC. These observations suggest that models should include the impact of rotation and weak winds on ionizing flux to accurately interpret observations of metal-poor galaxies in both the near and distant universe.
description: Accepted at ApJ. 9 figures, 24 pages
Benchmarking Exchange-Correlation Functionals in the Spin-Polarized Inhomogeneous Electron Gas under Warm Dense Conditions
Creators: name: Moldabekov, Zhandos
name: Dornheim, Tobias
name: Vorberger, Jan
name: Cangi, Attila
Publisher: name: arXiv
Year: 2021
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Warm dense matter is a highly active research area both at the frontier and interface of material science and plasma physics. We assess the performance of commonly used exchange-correlation (XC) approximation (LDA, PBE, PBEsol, and AM05) in the spin-polarized inhomogeneous electron gas under warm dense conditions based on exact path-integral quantum Monte-Carlo calculations. This extends our recent analysis on the relevance of inhomogeneities in the spin-unpolarized warm dense electron gas [Z.~Moldabekov et al., J. Chem. Phys. 155, 124116 (2021)]. We demonstrate that the predictive accuracy of these XC functionals deteriorates with (1) a decrease in density (corresponding to an increase in the inter-electronic correlation strength) and (2) an increase of the characteristic wave number of the density perturbation. We provide recommendations for the applicability of the considered XC functionals at conditions typical for warm dense matter. Furthermore, we hint at future possibilities for constructing more accurate XC functionals under these conditions.
Loeseneriella urceolus N. Halle 1978
Creators: name: Coughenour, Jennifer M.
name: Simmons, Mark P.
name: Lombardi, Julio A.
name: Yakobson, Kendra
name: Archer, Robert H.
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Celastrales
Celastraceae
Loeseneriella
Loeseneriella urceolus

description: Loeseneriella urceolus (Tul.) N.Hallé — R.H. Archer et al. 3002, Madagascar (CS); 26S rDNA HM230085, ITS rDNA HM230133, matK HM230177, trnL intron HM230224, trnL-F spacer HM230268;
description: Published as part of Coughenour, Jennifer M., Simmons, Mark P., Lombardi, Julio A., Yakobson, Kendra & Archer, Robert H., 2011, Phylogeny of Celastraceae subfamily Hippocrateoideae inferred from morphological characters and nuclear and plastid loci, pp. 320-330 in Molecular Phylogenetics and Evolution 59 (2) on page 327, DOI: 10.1016/j.ympev.2011.02.017, http://zenodo.org/record/5155694
Complex simulation of entrepreneurial opportunity emergence: The case of Nigerian entrepreneurship
Creators: name: Okoye, Izuchukwu Benedict
Publisher: name: Cardiff Metropolitan University
Year: 2022
Subjects: Entrepreneurship

description: The current policy and public debate on the overall topic of entrepreneurship pays little attention to a more specific and developing property of entrepreneurship such as the emergence of an entrepreneur. This study examines the emergence of entrepreneurs through their behavioural interaction amongst one another and their environment. As a research methodology, agent based modelling was adopted for this research over system dynamics because, individual interactions (behavioural reactions/responses) between each entity and the immediate universe (environment) is the crucial unit for determination of the research results. In order to correctly capture this concept, interactions in the forms of personality trait attributes, social networking, technological acquaintance, environment (niche) and previous know-how (prior knowledge) were considered as the behaviours of study using agent based model. To achieve this, these entities were broken into their sub attributes in Bayesian probability model to provide statistical data for the behavioural analysis and a NetLogo simulation tool was used to reproduce a visual behavioural pattern of the agents (entrepreneurs) within an artifitial universe. It is this process of using simulation to study entrepreneurial behaviour that is called 'Simuprenuership' within this study.
 The emergent patterns and behaviours implies that, entrepreneurship is an emergent process that takes form during and within the interactions between the agents and the environment. This suggest that variations in the smallest attributes of the agents could completely result in an unpredictable emergence. Hence, discernment process is not suuficient to explain entrepreneurship as in the literature. therefore, there is a necessity to move from cognition, illumination or insightful way of entrepreneurial thinking, to a more holistic and evolutionary system of thinking, this study adopted an emergent system of thinking. This infers that entrepreneurial ideas and opportunities emerge from a mindset that is a system function of entrepreneurial qualities, expertise, and knowledge. Hence, I presume that entrepreneurship is not 'flat' but instead emerges from a dynamic procedure.