cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Identification of Logical Errors through Monte-Carlo Simulation
Creators: name: Emmett, Hilary L.
name: Goldman, Lawrence I.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: The primary focus of Monte Carlo simulation is to identify and quantify risk related to uncertainty and variability in spreadsheet model inputs. The stress of Monte Carlo simulation often reveals logical errors in the underlying spreadsheet model that might be overlooked during day-to-day use or traditional "what-if" testing. This secondary benefit of simulation requires a trained eye to recognize warning signs of poor model construction.
description: 8 Pages, 10 Colour Figures
title: The sudden contact between two separate worlds
Creators: name: Steindl, Josef
Year: 2017
Subjects: subject: Osteuropa Wirtschaftsreform Wirtschaftssystem Transformation Ost-West Beziehungen

description: Untertitel fingiert. - Das Paper wurde verfasst anlässlich der sog. Ost-West-Konferenz: New Economic Relations beween East and West - Conference of the Kreisky Commission and the Swedish Embassy in Vienna, May 17-18, 1990. (Unveröffentlichtes Werk)
description: Typoskript, 2 Blätter, 3 Seiten
Inteligência Artificial, Big Data e sua utilização na área de saúde
Creators: name: Gradvohl, Andre Leon Sampaio
Publisher: name: Zenodo
Year: 2023
Subjects: Inteligência Artificial
Big Data
Saúde
Mineração de Dados
Segurança de dados

description: Apresentação para o curso de Mestrado Profissional em Hemoterapia da Universidade Estadual de Campinas. A apresentação aborda desde conceitos fundamentais sobre dados, informação e conhecimento, passando por uma breve definição de inteligência artificial, até a utilização dos conceitos de Big Data. Os slides também tratam das questões envolvidas com a segurança dos dados. Por se tratar de estudantes da área de saúde, o conteúdo é voltado para aqueles que não têm muita experiência na área de Computação.
Oblivious communication game, self-testing of projective and non-projective measurements and certification of randomness
Creators: name: Pan, A. K.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We provide an interesting two-party parity oblivious communication game whose success probability is solely determined by the Bell expression. The parity-oblivious condition in an operational quantum theory implies the preparation non-contextuality in an ontological model of it. We find that the aforementioned Bell expression has two upper bounds in an ontological model; the usual local bound and a non-trivial preparation non-contextual bound arising from the non-trivial parity-oblivious condition, which is smaller that the local bound. We first demonstrate the communication game when both Alice and Bob perform three measurements of dichotomic observables in their respective sites. The optimal quantum value of the Bell expression in this scenario enables us to device-independently self-test the maximally entangled state and trine-set of observables, three-outcome qubit positive-operator-valued-measures (POVMs) and 1.58 bit of local randomness. Further, we generalize the above communication game in that both Alice and Bob perform the same but arbitrary (odd) number ($n> 3$) of measurements. Based on the optimal quantum value of the relevant Bell expression for any arbitrary $n$, we have also demonstrated device-independent self-testing of state and measurements.
description: 16 pages, 2 figures
Coupled-Channel and Screening Effects in Charmonium Spectrum
Creators: name: Li, Bai-Qing
name: Meng, Ce
name: Chao, Kuang-Ta
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Using the same quenched limit as input, we compare the charmonium spectra predicted by the coupled-channel model and the screened potential model in the mass region below 4 GeV, in which the contributions from decay channels involving P-wave (as well as even higher excited) D mesons can be neglected. We find that the two models have similar global features in describing charmonium spectrum since they embody the same effect of the vacuum polarization of dynamical light quark pairs. This agreement is encouraging for using the screened potential to further describe the mass spectrum of higher charmonium in the region above 4 GeV. Applying both models will be helpful to clarify the nature of the newly discovered "X,Y,Z" mesons in B-factories and other experiments. In particular, we show the S-wave decay coupling effect on lowering the $χ_{c1}(2P)$ mass towards the $D\bar {D^*}$ threshold, in support of the assignment of the X(3872) as a $χ_{c1}(2P)$-dominated charmonium state.
description: 6 pages, 4 figures
Semi-device independent certification of multiple unsharpness parameters through sequential measurements
Creators: name: Mukherjee, Sumit
name: Pan, A. K.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Based on a sequential communication game, semi-device independent certification of an unsharp instrument has recently been demonstrated [\href{https://iopscience.iop.org/article/10.1088/1367-2630/ab3773}{New J. Phys. 21 083034 (2019), }\href{https://journals.aps.org/prresearch/abstract/10.1103/PhysRevResearch.2.033014}{ Phys. Rev. Research 2, 033014 (2020)}]. In this paper, we provide semi-device independent self-testing protocols in the prepare-measure scenario to certify multiple unsharpness parameters along with the states and the measurement settings. This is achieved through the sequential quantum advantage shared by multiple independent observers in a suitable communication game known as parity-oblivious random-access-code. We demonstrate that in 3-bit parity-oblivious random-access-code, at most three independent observers can sequentially share quantum advantage. The optimal pair (triple) of quantum advantages enables us to uniquely certify the qubit states, the measurement settings, and the unsharpness parameter(s). The practical implementation of a given protocol involves inevitable losses. In a sub-optimal scenario, we derive a certified interval within which a specific unsharpness parameter has to be confined. We extend our treatment to the 4-bit case and show that at most two observers can share quantum advantage for the qubit system. Further, we provide a sketch to argue that four sequential observers can share the quantum advantage for the two-qubit system, thereby enabling the certification of three unsharpness parameters.
title: The sudden contact between two separate worlds
Creators: name: Steindl, Josef
Year: 2017
Subjects: subject: Osteuropa Wirtschaftsreform Wirtschaftssystem Transformation Ost-West Beziehungen

description: Untertitel fingiert. - Das Paper wurde verfasst anlässlich der sog. Ost-West-Konferenz: New Economic Relations beween East and West - Conference of the Kreisky Commission and the Swedish Embassy in Vienna, May 17-18, 1990.
description: Kopie eines Typoskripts mit handschriftlichen Anmerkungen und Anstreichungen, 4 Blätter
High-P_T Physics with Identified Particles
Creators: name: Fries, R. J
name: Liu, W.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The suppression of high-P_T particles in heavy ion collisions was one of the key discoveries at the Relativistic Heavy Ion Collider. This is usually parameterized by the average rate of momentum-transfer squared to this particle, qhat. Here we argue that measurements of identified particles at high P_T can lead to complementary information about the medium. The leading particle of a jet can change its identity through interactions with the medium. Tracing such flavor conversions could allow us to constrain the mean free path. Here we review the basic concepts of flavor conversions and discuss applications to particle ratios and elliptic flow. We make a prediction that strangeness is enhanced at high P_T at RHIC energies while its elliptic flow is suppressed.
description: Contribution to Quark Matter 2009; 4 pages, 4 figures; v2: small fixes in style due to referee
Unraveling DNA tori under tension
Creators: name: Battle, C.
name: Broek, B. van den
name: Noom, M. C.
name: van Mameren, J.
name: Wuite, G. J. L.
name: MacKintosh, F. C.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Biological Physics (physics.bio-ph)
subject: FOS: Physical sciences

description: Motivated by recent experiments, we develop a model for DNA toroids under external tension. We find that tori are the equilibrium states for our model up to a critical tension, above which they become only metstable. Above this tension, we find a cascade of transitions between discrete toroid states that successively lowers the winding number, until the ground state (rod) is reached. In this process, this model predicts a nearly constant force plateau as a function of extension, in agreement with experiment.
description: 9 pages, 11 figures
Non-flow, and what flow to subtract in jet-correlation
Creators: name: Wang, Fuqiang
name: Wang, Quan
Publisher: name: arXiv
Year: 2009
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We derive analytical forms for non-flow contributions from cluster correlation to two-particle elliptic flow (v2{2}) measure. We also derive an analytical form for jet-correlation flow-background with the same cluster approach. We argue that the elliptic flow v2 parameter to be used in jet-correlation background is that from two-particle method excluding non-flow correlations unrelated to the reaction plane, but including cross-terms between cluster correlation and cluster flow. We verify our result with Monte Carlo simulations. We discuss how one may obtain the v2 parameter for jet-correlation background experimentally.
description: 11 pages 1 table 1 figure. Proceedings of 4th international workshop on High-pT physics at LHC-09, 2009, Prague, Czech Republic
Probing the electron-to-proton mass ratio gradient in the Milky Way with class I methanol masers
Creators: name: Levshakov, S. A.
name: Agafonova, I. I.
name: Henkel, C.
name: Kim, Kee-Tae
name: Kozlov, M. G.
name: Lankhaar, B.
name: Yang, W.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We estimate limits on non-universal coupling of hypothetical hidden fields to standard matter by evaluating the fractional changes in the electron-to-proton mass ratio, mu = m_e/m_p, based on observations of ClassI methanol masers distributed in the Milky Way disk over the range of the galactocentric distances 4 < R < 12 kpc. The velocity offsets DeltaV = V44 - V95 measured between the 44 and 95 GHz methanol lines provide, so far, one of the most stringent constraints on the spatial gradient k_mu = d(Delta mu/mu)/dR < 2x10^-9 kpc-1 and the upper limit on Delta mu/mu < 2x10^-8, where Delta mu/mu = (mu_obs-mu_lab)/mu_lab. We also find that the offsets DeltaV are clustered into two groups which are separated by 0.022 +/- 0.003 km/s (1sigma C.L.). The grouping is most probably due to the dominance of different hyperfine transitions in the 44 and 95 GHz methanol maser emission. Which transition becomes favored is determined by an alignment (polarization) of the nuclear spins of the four hydrogen atoms in the methanol molecule. This result confirms that there are preferred hyperfine transitions involved in the methanol maser action.
description: Accepted for publication in MNRAS, 7 pages text, 8 figures, 7 tables
Fundamental parameters of some B-type stars using NOAO Indo-U.S. Library
Creators: name: Shokry, A.
name: Nouh, M. I.
name: Saad, S. M.
name: Helmy, I.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: In the present article, we present a spectroscopic analysis of 83 field B-type stars from NOAO Indo-U.S. Library. We calculated the fundamental parameters e.g effective temperatures, surface gravities, and rotational velocities using Barbier-Chalonge-Divan (BCD) method and line blanketed LTE/NLTE model atmospheres. The projected rotational velocity was estimated by fitting the Mg II4481 Å line profile with theoretical lines calculated from LTE/NLTE models. The evolutionary masses for the program stars are estimated using the evolutionary models. In most of the cases, the present study gives fair agreement with earlier investigations and is even more accurate in some cases.
description: 28 pages, 10 figures
title: The sudden contact between two separate worlds
Creators: name: Steindl, Josef
Year: 2017
Subjects: subject: Osteuropa Wirtschaftsreform Wirtschaftssystem Transformation Ost-West Beziehungen

description: Untertitel fingiert. - Das Paper wurde verfasst anlässlich der sog. Ost-West-Konferenz: New Economic Relations beween East and West - Conference of the Kreisky Commission and the Swedish Embassy in Vienna, May 17-18, 1990. (Unveröffentlichtes Werk)
description: Typoskript mit handschriftlichen Anmerkungen und Anstreichungen, 4 Blätter
Higher order GUP black hole based on COW experiment and Einstein-Bohr's photon box
Creators: name: Hamil, Bilel
name: Aounallah, Houcine
name: Rudra, Prabir
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this work we have explored the effects of higher order generalized uncertainty principle (GUP), inspired from the quantum gravity COW experiment and the Einstein-Bohr's photon box thought experiment, on the properties of a black hole. Two different GUP models, namely, GUP to all orders in the Planck length model, and GUP with minimal length uncertainty and maximal momentum model are considered for our study. For each model, we have investigated the modified de Broglie formula, modification in gravitational phase shift, Einstein-Bohr's photon box, and the modified Hawking temperature and the tidal force of the GUP modified black hole.
Improved Delay Estimates for a Queueing Model for Random Linear Coding for Unicast
Creators: name: Ravanbakhsh, Mohammad
name: Diez, Angela I. Barbero
name: Ytrehus, Oyvind
Publisher: name: arXiv
Year: 2009
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: Consider a lossy communication channel for unicast with zero-delay feedback. For this communication scenario, a simple retransmission scheme is optimum with respect to delay. An alternative approach is to use random linear coding in automatic repeat-request (ARQ) mode. We extend the work of Shrader and Ephremides, by deriving an expression for the delay of random linear coding over field of infinite size. Simulation results for various field sizes are also provided.
description: 5 pages, 3 figures, accepted at the 2009 IEEE International Symposium on Information Theory
title: The international trade and financial situation of Eastern Europe in 1988-1989
Creators: name: :Unkn
Year: 2017
Subjects: subject: Osteuropa Marktwirtschaft Wirtschaftsreform Wirtschaftssystem Transformation

description: Das Paper wurde als Hintergrundpapier zu Ost-West Konferenz (New Economic Relations beween East and West - Conference of the Kreisky Commission and the Swedish Embassy in Vienna, May 17-18, 1990) verwendet.
description: Kopie eines Teils der OECD Publikation, 3 Blätter, paginiert 11-20
E-Polynomials of Generic $\text{GL}_n\rtimes\!<\!σ\!>\!~$-Character Varieties: Branched Case
Creators: name: Shu, Cheng
Publisher: name: arXiv
Year: 2022
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics

description: For any branched double covering of compact Riemann surfaces, we consider the associated character varieties that are unitary in the global sense, which we call $\text{GL}_n\rtimes\!<\!σ\!>\!~$-character varieties. We restrict the monodromies around the ramification points to generic semi-simple conjugacy classes contained in $\text{GL}_nσ$, and compute the E-polynomials of these character varieties using the character table of $\text{GL}_n(q)\rtimes\!<\!σ\!>\!$. The result is expressed as the inner product of certain symmetric functions associated to the wreath products $(\mathbb{Z}/2\mathbb{Z})^N\rtimes\mathfrak{S}_N$. We are then led to a conjectural formula for the mixed Hodge polynomial, which involves (modified) Macdonald polynomials and wreath Macdonald polynomials.
Spontaneous dressed-state polarization in the strong driving regime of cavity QED
Creators: name: Armen, Michael A.
name: Miller, Anthony E.
name: Mabuchi, Hideo
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We utilize high-bandwidth phase quadrature homodyne measurement of the light transmitted through a Fabry-Perot cavity, driven strongly and on resonance, to detect excess phase noise induced by a single intracavity atom. We analyze the correlation properties and driving-strength dependence of the atom-induced phase noise to establish that it corresponds to the long-predicted phenomenon of spontaneous dressed-state polarization. Our experiment thus provides a demonstration of cavity quantum electrodynamics in the strong driving regime, in which one atom interacts strongly with a many-photon cavity field to produce novel quantum stochastic behavior.
description: 4 pages, 4 color figures
Centrality Dependence of Strangeness Enhancement in Ultrarelativistic Heavy Ion Collisions - a Core-Corona Effect
Creators: name: Aichelin, J.
name: Werner, K.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: In ultrarelativistic heavy ion collisions, the multiplicity of multi-strange baryons per participating nucleon increases with centrality in a different fashion for different systems and energies. At RHIC, for copper+copper (CuCu) collisions the increase is much steeper than for gold-gold (AuAu) collisions. We show that this system size dependence is due to a core-corona effect: the relative importance of the corona as compared to the core (thermalized matter) contribution varies and the contribution of a corona nucleon to the multiplicity differs from that of a core nucleon. $ϕ$ mesons follow in principle the same trend, but the difference between core and corona multiplicity is relatively small, and therefore the CuCu and AuAu results are quite similar. This simple geometrical explanation makes also a strong case in favor of the validity of Glauber geometry in the peripheral regions of ultrarelativistic heavy ion collisions, which is crucial for understanding the early evolution of the system.
description: figure added, updated data and references, to be published in PRC
Final state interaction in kaons decays
Creators: name: Gevorkyan, S. R.
name: Tarasov, A. V.
name: Voskresenskaya, O. O.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The kaons decays to the pairs of charged and neutral pions are considered in the framework of the non-relativistic quantum mechanics. The general expressions for the decay amplitudes to the two different channels accounting for the strong interaction between pions are obtained. The developed approach allows one to estimate the contribution of terms of any order in strong interaction and correctly takes into account the electromagnetic interaction between the pions in the final state.
description: 8 pages
Gravitational Waves from Incomplete Inflationary Phase Transitions
Creators: name: Barir, Joel
name: Geller, Michael
name: Sun, Chen
name: Volansky, Tomer
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We study the observable implications of an incomplete first order phase transition during inflation. In such a phase transition, the nucleated bubbles do not percolate and instead are continuously produced until the onset of reheating. The process creates an inhomogeneity with a distinct power spectrum that depends on both the physics of the phase transition and the inflationary dynamics. Upon horizon re-entry, this spectrum generates gravitational waves through non-linear effects. This stochastic gravitational wave background is predicted to have unique signatures that may be detectable by future experiments spanning a wide frequency range. The discovery of such a gravitational wave signal would shed a light on the detailed dynamics of inflation.
description: 12 pages, 4 figures
Higgs inflation and its extensions and the further refining dS swampland conjecture
Creators: name: Liu, Yang
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: On the one hand, David Andriot and Christoph Roupec proposed an alternative refined de Sitter conjecture, which gives a natural condition on a combination of the first and second derivatives of the scalar potential. On the other hand, in our previous article, we have found that Palatini Higgs inflation model is in strong tension with the refined de Sitter swampland conjecture. Therefore, following our previous research, in this article we examine if Higgs inflation model and its two variations: Palatini Higgs inflation and Higgs-Dilaton model can satisfy the further refining de Sitter swampland conjecture or not. Based on observational data, we find that these three inflationary models can always satisfy this new swampland conjecture if only we adjust the relevant parameters a, b=1-a and q. Therefore,if the further refining de Sitter swampland conjecture does indeed hold, then the three inflationary models might all be in landscape.
title: Notizen und Daten zur Wirtschaftslage in Osteuropa
Creators: name: Steindl, Josef
Year: 2017

description: Titel fingiert. - Die letzten 2 Blätter enthalten Notizen zu Arbeit am PC. Auf den Rückseiten befinden sich Teile eines Typoskripts von Steindl sowie einer WIFO - Presseinformation, datiert 1992.
description: handschriftliche Notizen, 12 Blätter
Earwig travel in relation to habitat
Creators: name: Lame, Robert John
Publisher: name: University of British Columbia
Year: 2010

description: In current ecological theory, dispersal and spatial heterogeneity loom large among the processes and patterns thought to influence the dynamics of animal populations. In this study I identify the behavioural adaptations for dispersal displayed by a flightless insect, the European earwig, Forficula auricularia L, and examine some of the consequences of adaptive dispersal for its local populations. The life-history of the species is described. It can be divided into a nesting and a free-foraging phase. Differential nesting success and survival of free-foragers were observed in two kinds of habitat, previous techniques for studying earwig ecology and behaviour are reviewed and compared with some methods especially developed for this study. The parental behaviour of auricularia is compared with that of other earwigs. Three kinds of dispersal from the nest are described: (1) passive dispersal from the nest by second-instar nymphs, (2) active dispersal from the nest by first- and second-instar nymphs, and (3) inter-brood dispersal by females. The latter two behaviours are considered to be examples of adaptive dispersal. The free-foraging phase is a period of growth during which nocturnal foraging alternates with diurnal utilization of shelter. Foraging and sheltering behaviour are described. From the results of field experiments, I conclude that added shelter increases survival, but utilization of shelter is limited by competition for food among insects from the same or from adjacent shelters. Diurnal changes in intra-specific agonistic behaviour and a relationship between shelter acceptance and recent feeding history are the behavioural mechanisms involved. The latter behaviour is considered to be a dispersal mechanism. These results are compared with current concepts of adaptive dispersal in insects and adaptation for life in spatially heterogeneous environments.
Lissaclita Gomez-Daglio & Syoc, 2006, gen. nov.
Creators: name: Gomez-Daglio, Liza
name: Syoc, Robert Van
Publisher: name: Zenodo
Year: 2006
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Maxillopoda
Sessilia
Tetraclitidae
Lissaclita

description: Genus Lissaclita gen. nov. Diagnosis: Shell conical to cylindroconical, with four plates, diametric growth, carina with two strongly developed transparietal alae, rostrum with two weakly developed disparietal radii (non­tubiferous), parietes with secondarily divided row of tubes lacking transverse septa, membranous basis. Opercular plates and exoskeletal cuticular characters resembling those found in the four­plated barnacles of the Tetraclitidae group. Type species: Lissaclita melaniae sp. nov. Etymology: From the Latin liss­, smooth; and the Greek clit­, a slope or hill. Gender feminine.
description: Published as part of Gomez-Daglio, Liza & Syoc, Robert Van, 2006, A new genus and species of high intertidal barnacle (Cirripedia, Tetraclitidae) from Baja California Sur, México, pp. 57-68 in Zootaxa 1118 on page 58, DOI: 10.5281/zenodo.171665
The effect of three matters on KSS bound
Creators: name: Sadeghi, Mehdi
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this paper we introduce the black brane solutions in AdS space in 4-dimensional (4D) Einstein-Gauss-Bonnet-Yang-Mills theory in the presence of string cloud and quintessence. Shear viscosity to entropy density ratio is computed via fluid-gravity duality, as a transport coefficient for this model.
description: 11 Pages, no figure, typo corrected, references added, minor modifications, accepted for publication in MPLA
CCLF: A Contrastive-Curiosity-Driven Learning Framework for Sample-Efficient Reinforcement Learning
Creators: name: Sun, Chenyu
name: Qian, Hangwei
name: Miao, Chunyan
Publisher: name: arXiv
Year: 2022
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: In reinforcement learning (RL), it is challenging to learn directly from high-dimensional observations, where data augmentation has recently been shown to remedy this via encoding invariances from raw pixels. Nevertheless, we empirically find that not all samples are equally important and hence simply injecting more augmented inputs may instead cause instability in Q-learning. In this paper, we approach this problem systematically by developing a model-agnostic Contrastive-Curiosity-Driven Learning Framework (CCLF), which can fully exploit sample importance and improve learning efficiency in a self-supervised manner. Facilitated by the proposed contrastive curiosity, CCLF is capable of prioritizing the experience replay, selecting the most informative augmented inputs, and more importantly regularizing the Q-function as well as the encoder to concentrate more on under-learned data. Moreover, it encourages the agent to explore with a curiosity-based reward. As a result, the agent can focus on more informative samples and learn representation invariances more efficiently, with significantly reduced augmented inputs. We apply CCLF to several base RL algorithms and evaluate on the DeepMind Control Suite, Atari, and MiniGrid benchmarks, where our approach demonstrates superior sample efficiency and learning performances compared with other state-of-the-art methods.
description: Full paper with supplementary material, accepted by IJCAI 2022. Acknowledgements and affiliations are updated
Educational Technology for Teaching & Learning and Grade 7 Students' Proficiency Skills in Science & Technology
Creators: name: Aliazas, John Vincent
Publisher: name: Zenodo
Year: 2014
Subjects: Educational Technology
Science Proficiency Skills
Grade 7 Science

description: This study focused on examining the relationship between educational technology and the proficiency skills of grade 7 students in science and technology in selected schools within the division of San Pablo City. The study included a total of 116 science curriculum students from secondary schools in the division. The researcher utilized Pearson correlation to determine significant relationships between variables. The findings indicated that educational technology-related factors, particularly instructional learning materials, were seldom used. However, respondents highlighted that teacher methodology played a crucial role in students' performance. The respondents expressed agreement that educational technology could help them achieve higher performance in science and technology. In terms of the teaching-learning domains of practice, the respondents perceived the design of educational technology tools as effective, but improvements were needed in their development and utilization. Utilization of these materials was reported to be almost never used. Integrated media was highly prioritized by students to achieve better marks in the subject. These results suggest that the use of educational technology may enhance students' performance in science and technology. The respondents demonstrated advanced proficiency skills in terms of knowledge and process/skills, while their level of understanding was marked as proficient. Furthermore, a significant relationship was found between student proficiency skills and educational technology-related factors, particularly instructional learning materials and attitudes towards science and technology. However, except for the subdomains of utilization and management, no significant relationship was observed between the teaching-learning domains of practice and students' proficiency skills. In conclusion, this study highlights the limited use of instructional learning materials and the importance of teacher methodology in students' performance. It also underscores the potential of educational technology in enhancing students' performance in science and technology. The findings emphasize the significance of incorporating effective instructional materials and cultivating positive attitudes towards science and technology. Additionally, the study suggests the need to improve the utilization and management of educational technology tools.
Symmetries as the guiding principle for flattening bands of Dirac fermions
Creators: name: Sheffer, Yarden
name: Queiroz, Raquel
name: Stern, Ady
Publisher: name: arXiv
Year: 2022
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Since the discovery of magic-angle twisted bilayer graphene (TBG), flat bands in Dirac materials have become a prominent platform for realizing strong correlation effects in electronic systems. Here we show that the symmetry group protecting the Dirac cone in such materials determines whether a Dirac band may be flattened by the tuning of a small number of parameters. We devise a criterion that, given a symmetry group, allows for the calculation of the number of parameters required to make the Dirac velocity vanish. This criterion is employed to study band flattening in twisted bilayer graphene and in surface states of 3D topological insulators. Following this discussion, we identify the symmetries under which the vanishing of the Dirac velocity implies the emergence of perfectly-flat bands. Our analysis allows us to construct additional model Hamiltonians that display perfectly-flat bands at certain points in the space of parameters: the first is a toy model of two coupled 3D TI surfaces, and the second is a quasi-crystalline generalization of the chiral model of TBG.
description: 21 pages, 12 figures, Accepted to Physical Review x
Geometric Methods for Adjoint Systems
Creators: name: Tran, Brian
name: Leok, Melvin
Publisher: name: arXiv
Year: 2022
Subjects: subject: Optimization and Control (math.OC)
subject: Numerical Analysis (math.NA)
subject: Symplectic Geometry (math.SG)
subject: FOS: Mathematics

description: Adjoint systems are widely used to inform control, optimization, and design in systems described by ordinary differential equations or differential-algebraic equations. In this paper, we explore the geometric properties and develop methods for such adjoint systems. In particular, we utilize symplectic and presymplectic geometry to investigate the properties of adjoint systems associated with ordinary differential equations and differential-algebraic equations, respectively. We show that the adjoint variational quadratic conservation laws, which are key to adjoint sensitivity analysis, arise from (pre)symplecticity of such adjoint systems. We discuss various additional geometric properties of adjoint systems, such as symmetries and variational characterizations. For adjoint systems associated with a differential-algebraic equation, we relate the index of the differential-algebraic equation to the presymplectic constraint algorithm of Gotay et al. [18]. As an application of this geometric framework, we discuss how the adjoint variational quadratic conservation laws can be used to compute sensitivities of terminal or running cost functions. Furthermore, we develop structure-preserving numerical methods for such systems using Galerkin Hamiltonian variational integrators (Leok and Zhang [23]) which admit discrete analogues of these quadratic conservation laws. We additionally show that such methods are natural, in the sense that reduction, forming the adjoint system, and discretization all commute, for suitable choices of these processes. We utilize this naturality to derive a variational error analysis result for the presymplectic variational integrator that we use to discretize the adjoint DAE system. Finally, we discuss the application of adjoint systems in the context of optimal control problems, where we prove a similar naturality result.
description: 61 pages, 5 figures
Quark formation and phenomenology in binary neutron-star mergers using V-QCD
Creators: name: Tootle, Samuel
name: Ecker, Christian
name: Topolski, Konrad
name: Demircik, Tuna
name: Järvinen, Matti
name: Rezzolla, Luciano
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Using full 3+1 dimensional general-relativistic hydrodynamic simulations of equal- and unequal-mass neutron-star binaries with properties that are consistent with those inferred from the inspiral of GW170817, we perform a detailed study of the quark-formation processes that could take place after merger. We use three equations of state consistent with current pulsar observations derived from a novel finite-temperature framework based on V-QCD, a non-perturbative gauge/gravity model for Quantum Chromodynamics. In this way, we identify three different post-merger stages at which mixed baryonic and quark matter, as well as pure quark matter, are generated. A phase transition triggered collapse already $\lesssim 10\,\rm{ms}$ after the merger reveals that the softest version of our equations of state is actually inconsistent with the expected second-long post-merger lifetime of GW170817. Our results underline the impact that multi-messenger observations of binary neutron-star mergers can have in constraining the equation of state of nuclear matter, especially in its most extreme regimes.
description: 11 pages, 5 figures, 3 appendices
From heavy rain removal to detail restoration: A faster and better network
Creators: name: Wen, Yuanbo
name: Gao, Tao
name: Zhang, Jing
name: Zhang, Kaihao
name: Chen, Ting
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Image and Video Processing (eess.IV)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: The profound accumulation of precipitation during intense rainfall events can markedly degrade the quality of images, leading to the erosion of textural details. Despite the improvements observed in existing learning-based methods specialized for heavy rain removal, it is discerned that a significant proportion of these methods tend to overlook the precise reconstruction of the intricate details. In this work, we introduce a simple dual-stage progressive enhancement network, denoted as DPENet, aiming to achieve effective deraining while preserving the structural accuracy of rain-free images. This approach comprises two key modules, a rain streaks removal network (R$^2$Net) focusing on accurate rain removal, and a details reconstruction network (DRNet) designed to recover the textural details of rain-free images. Firstly, we introduce a dilated dense residual block (DDRB) within R$^2$Net, enabling the aggregation of high-level and low-level features. Secondly, an enhanced residual pixel-wise attention block (ERPAB) is integrated into DRNet to facilitate the incorporation of contextual information. To further enhance the fidelity of our approach, we employ a comprehensive loss function that accentuates both the marginal and regional accuracy of rain-free images. Extensive experiments conducted on publicly available benchmarks demonstrates the noteworthy efficiency and effectiveness of our proposed DPENet. The source code and pre-trained models are currently available at \url{https://github.com/chdwyb/DPENet}.
description: Accepted by Pattern Recognition
A Comprehensive Survey on Model Quantization for Deep Neural Networks in Image Classification
Creators: name: Rokh, Babak
name: Azarpeyvand, Ali
name: Khanteymoori, Alireza
Publisher: name: arXiv
Year: 2022
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences
subject: A.1

description: Recent advancements in machine learning achieved by Deep Neural Networks (DNNs) have been significant. While demonstrating high accuracy, DNNs are associated with a huge number of parameters and computations, which leads to high memory usage and energy consumption. As a result, deploying DNNs on devices with constrained hardware resources poses significant challenges. To overcome this, various compression techniques have been widely employed to optimize DNN accelerators. A promising approach is quantization, in which the full-precision values are stored in low bit-width precision. Quantization not only reduces memory requirements but also replaces high-cost operations with low-cost ones. DNN quantization offers flexibility and efficiency in hardware design, making it a widely adopted technique in various methods. Since quantization has been extensively utilized in previous works, there is a need for an integrated report that provides an understanding, analysis, and comparison of different quantization approaches. Consequently, we present a comprehensive survey of quantization concepts and methods, with a focus on image classification. We describe clustering-based quantization methods and explore the use of a scale factor parameter for approximating full-precision values. Moreover, we thoroughly review the training of a quantized DNN, including the use of a straight-through estimator and quantization regularization. We explain the replacement of floating-point operations with low-cost bitwise operations in a quantized DNN and the sensitivity of different layers in quantization. Furthermore, we highlight the evaluation metrics for quantization methods and important benchmarks in the image classification task. We also present the accuracy of the state-of-the-art methods on CIFAR-10 and ImageNet.
description: The title of the paper has been changed. The abstract has been improved. The grammatical errors have been corrected. The structure of the paper has been modified. Some new and important references have been added. Some of the used abbreviations in the paper have been corrected. Some figures have been improved. Accepted in ACM Transactions on Intelligent Systems and Technology
Observing behaviour in pigeons : an investigation of the reinforcing value of the negative discriminitive stimulus
Creators: name: Spencer, John Wayne
Publisher: name: University of British Columbia
Year: 2010

description: To determine if a stimulus associated with nonreinforcement can maintain observing behaviour as predicted by Hendry's information hypothesis, three pigeons were trained in a three-key operant chamber. On the yellow center key, periods during which food reinforcement for key pecking was available on a random-interval schedule, alternated irregularly with periods of nonreinforcement (extinction). Pecking the yellow right key produced, on a random-interval schedule, stimuli associated with the prevailing reinforcement condition on the center key: green (S₊), when the random-interval schedule was in effect; red (S₋), when extinction was in effect. Pecking the yellow left key was reinforced by food on a random-interval schedule. The inclusion of this key was intended to attenuate a possible punishing effect S₋ might have upon observing by arranging that reinforcement occasionally occurred on this key when reinforcement for pecking the center key was unavailable. After training, the consequences of pecking the observing key were manipulated. In one condition, S₊ was eliminated as a consequence and only S₋ could be produced. In another condition, S₋ was eliminated and only S₊ could be produced. When the consequences of observing were only S₊ or both S₊ and S₋, observing was maintained. When only S₋ was a consequence, observing extinguished. There was little difference between the observing rates when only S₊ and when both S₊ and S₋ were consequences. The results do not support Hendry's information theory of observing, but are consistent with reinforcement accounts of observing.
Formulations and Algorithms for Routing Problems
Creators: name: Salari, Majid <1982>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2010
Subjects: MAT/09 Ricerca operativa

description: Combinatorial Optimization is a branch of optimization that deals with the problems where the set of feasible solutions is discrete. Routing problem is a well studied branch of Combinatorial Optimization that concerns the process of deciding the best way of visiting the nodes (customers) in a network. 
Routing problems appear in many real world applications including: Transportation, Telephone or Electronic data Networks.

During the years, many solution procedures have been introduced for the solution of different Routing problems. Some of them are based on exact approaches to solve the problems to optimality and some others are based 
on heuristic or metaheuristic search to find optimal or near optimal solutions. There is also a less studied method, which combines both heuristic and exact approaches to face different problems including those in the Combinatorial Optimization area.

The aim of this dissertation is to develop some solution procedures based 
on the combination of heuristic and Integer Linear Programming (ILP) techniques for some important problems in Routing Optimization. In this approach, given an initial feasible solution to be possibly improved, the method follows a destruct-and-repair paradigm, where the given solution is randomly destroyed (i.e., customers are removed in a random way) and repaired by solving an ILP model, in an attempt to find a new improved solution.
Classification of datasets with imputed missing values: does imputation quality matter?
Creators: name: Shadbahr, Tolou
name: Roberts, Michael
name: Stanczuk, Jan
name: Gilbey, Julian
name: Teare, Philip
name: Dittmer, Sören
name: Thorpe, Matthew
name: Torne, Ramon Vinas
name: Sala, Evis
name: Lio, Pietro
name: Patel, Mishal
name: Collaboration, AIX-COVNET
name: Rudd, James H. F.
name: Mirtti, Tuomas
name: Rannikko, Antti
name: Aston, John A. D.
name: Tang, Jing
name: Schönlieb, Carola-Bibiane
Publisher: name: arXiv
Year: 2022
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Classifying samples in incomplete datasets is a common aim for machine learning practitioners, but is non-trivial. Missing data is found in most real-world datasets and these missing values are typically imputed using established methods, followed by classification of the now complete, imputed, samples. The focus of the machine learning researcher is then to optimise the downstream classification performance. In this study, we highlight that it is imperative to consider the quality of the imputation. We demonstrate how the commonly used measures for assessing quality are flawed and propose a new class of discrepancy scores which focus on how well the method recreates the overall distribution of the data. To conclude, we highlight the compromised interpretability of classifier models trained using poorly imputed data.
description: 17 pages, 10 figures, 30 supplementary pages
title: Die Einführung der Zinsertragsteuer (ZESt) in Österreich
Creators: name: Mooslechner, Peter
Year: 2017

description: Mit persönlicher Widmung des Verfassers (auf beigelegter Visitenkarte).
description: Kopie des Aufsatzes, 7 Blätter, paginiert 719-725
Incivility Detection in Open Source Code Review and Issue Discussions
Creators: name: Ferreira, Isabella
name: Rafiq, Ahlaam
name: Cheng, Jinghui
Publisher: name: arXiv
Year: 2022
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: Given the democratic nature of open source development, code review and issue discussions may be uncivil. Incivility, defined as features of discussion that convey an unnecessarily disrespectful tone, can have negative consequences to open source communities. To prevent or minimize these negative consequences, open source platforms have included mechanisms for removing uncivil language from the discussions. However, such approaches require manual inspection, which can be overwhelming given the large number of discussions. To help open source communities deal with this problem, in this paper, we aim to compare six classical machine learning models with BERT to detect incivility in open source code review and issue discussions. Furthermore, we assess if adding contextual information improves the models' performance and how well the models perform in a cross-platform setting. We found that BERT performs better than classical machine learning models, with a best F1-score of 0.95. Furthermore, classical machine learning models tend to underperform to detect non-technical and civil discussions. Our results show that adding the contextual information to BERT did not improve its performance and that none of the analyzed classifiers had an outstanding performance in a cross-platform setting. Finally, we provide insights into the tones that the classifiers misclassify.
description: 18 pages