cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: The 4th Industrial (R)evolution: the role of service robots in online discourse
Creators: name: Borghi, Matteo
Publisher: name: University of Reading
Year: 2025

description: The 4th Industrial Revolution is expected to profoundly change the contemporaneous society. Despite rising in the manufacturing industries, by the name of Industry 4.0, business leaders are increasingly turning their attention towards services and service industries. Scholars in management and social sciences have started to conduct their examinations; however, the emerging intellectual structure of this nascent field of literature has never been synthesised. Moreover, little is known about the role of Industry 4.0 initiatives in the service industries since no study so far has critically analysed the service component of this disruptive phenomenon. In particular, in the literature pertaining to the digital transformation of services, the infusion of artificial intelligence in service robots – one of the technological pillars of Industry 4.0 – is perceived as a crucial source of innovation, able to redefine the service experience, especially in the tourism domain. However, there is no empirical evidence, in the post-service consumption phase, that sheds light on the peculiarities of service robots and most notably on their influence on perceived overall service quality and customer satisfaction. To bridge the abovementioned research gaps, this thesis demonstrates that (a) the managerial and social sciences intellectual efforts related to Industry 4.0 can be effectively classified in seven distinctive communities (Chapter 2); however, (b) services and the service industries are an unexplored but valuable component of the Industry 4.0 phenomenon (Chapter 2); (c) within the service industries, service robots, through the analysis of online conversations, are perceived as a popular and distinctive attribute in guests’ evaluation of the stay (Chapter 3); and (d) they are able to positively impact the customer experience and perceived service quality (Chapter 4). Taken together, these findings suggest that digital transformation, in the age of the 4 th Industrial Revolution, does not only promise productivity gains in the manufacturing industries but also has the capability to improve the customer experience and perceived service quality within the service industries.
Deriving temperature, mass and age of evolved stars from high-resolution spectra. Application to field stars and the open cluster IC 4651
Creators: name: Biazzo, K.
name: Pasquini, L.
name: Girardi, L.
name: Frasca, A.
name: da Silva, L.
name: Setiawan, J.
name: Marilli, E.
name: Hatzes, A. P.
name: Catalano, S.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We test our capability of deriving stellar physical parameters of giant stars by analysing a sample of field stars and the well studied open cluster IC 4651 with different spectroscopic methods. The use of a technique based on line-depth ratios (LDRs) allows us to determine with high precision the effective temperature of the stars and to compare the results with those obtained with a classical LTE abundance analysis. (i) For the field stars we find that the temperatures derived by means of the LDR method are in excellent agreement with those found by the spectral synthesis. This result is extremely encouraging because it shows that spectra can be used to firmly derive population characteristics (e.g., mass and age) of the observed stars. (ii) For the IC 4651 stars we use the determined effective temperature to derive the following results. a) The reddening E(B-V) of the cluster is 0.12+/-0.02, largely independent of the color-temperature calibration used. b) The age of the cluster is 1.2+/-0.2 Gyr. c) The typical mass of the analysed giant stars is 2.0+/-0.2M_sun. Moreover, we find a systematic difference of about 0.2 dex in log g between spectroscopic and evolutionary values. We conclude that, in spite of known limitations, a classical spectroscopic analysis of giant stars may indeed result in very reliable stellar parameters. We caution that the quality of the agreement, on the other hand, depends on the details of the adopted spectroscopic analysis.
description: 11 pages, 9 figures, version accepted for publication in A&A. Major changes: revised paper, new discussion of results, references added, one additional figure
A Rational Method for Probing Macromolecules Dissociation: The Antibody-Hapten System
Creators: name: Henriques, Elsa S.
name: Solov'yov, Andrey V.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Biological Physics (physics.bio-ph)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: The unbinding process of a protein-ligand complex of major biological interest was investigated by means of a computational approach at atomistic classical mechanical level. An energy minimisation-based technique was used to determine the dissociation paths of the system by probing only a relevant set of generalized coordinates. The complex problem was reduced to a low-dimensional scanning along a selected distance between the protein and the ligand. Orientational coordinates of the escaping fragment (the ligand) were also assessed in order to further characterise the unbinding. Solvent effects were accounted for by means of the Poisson--Boltzmann continuum model. The corresponding dissociation time was derived from the calculated barrier height, in compliance with the experimentally reported Arrhenius-like behaviour. The computed results are in good agreement with the available experimental data.
description: 22 pages, 10 figures
Complementary consistency test of the Copernican principle via Noether's theorem and machine learning forecasts
Creators: name: Arjona, Rubén
name: Nesseris, Savvas
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The Copernican principle (CP), i.e. the assumption that we are not privileged observers of the Universe, is a fundamental tenet of the standard cosmological model. A violation of this postulate implies the possibility that the apparent cosmic acceleration could be explained without the need of a cosmological constant, dark energy or paper we present a new test of the CP relating the distance and the expansion rate, derived via Noether's theorem, which is complementary to other tests found in the literature. We also simulate fiducial data based on upcoming stage IV galaxy surveys and use them to reconstruct the Hubble rate $H(z)$ and the angular diameter distance $d_A(z)$ in order to forecast how well our null test can constrain deviations from the cosmological constant model. We find that our new test can easily rule out several scenarios based on the Lema\^ıtre-Tolman-Bondi void model at confidence of $\gtrsim 3σ$ at middle to high redshifts ($z>0.5$).
description: 8 pages, 1 figure, 2 tables. Changes match published version
End-to-End Deep Fault Tolerant Control
Creators: name: Baimukashev, Daulet
name: Rakhim, Bexultan
name: Rubagotti, Matteo
name: Varol, Huseyin Atakan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Systems and Control (eess.SY)
subject: Robotics (cs.RO)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: PUBLISHED ON IEEE/ASME TRANSACTIONS ON MECHATRONICS, DOI: 10.1109/TMECH.2021.3100150. Ideally, accurate sensor measurements are needed to achieve a good performance in the closed-loop control of mechatronic systems. As a consequence, sensor faults will prevent the system from working correctly, unless a fault-tolerant control (FTC) architecture is adopted. As model-based FTC algorithms for nonlinear systems are often challenging to design, this paper focuses on a new method for FTC in the presence of sensor faults, based on deep learning. The considered approach replaces the phases of fault detection and isolation and controller design with a single recurrent neural network, which has the value of past sensor measurements in a given time window as input, and the current values of the control variables as output. This end-to-end deep FTC method is applied to a mechatronic system composed of a spherical inverted pendulum, whose configuration is changed via reaction wheels, in turn actuated by electric motors. The simulation and experimental results show that the proposed method can handle abrupt faults occurring in link position/velocity sensors. The provided supplementary material includes a video of real-world experiments and the software source code.
description: 11 pages, 7 figures
Deep neural network enabled corrective source term approach to hybrid analysis and modeling
Creators: name: Blakseth, Sindre Stenen
name: Rasheed, Adil
name: Kvamsdal, Trond
name: San, Omer
Publisher: name: arXiv
Year: 2021
Subjects: subject: Neural and Evolutionary Computing (cs.NE)
subject: Machine Learning (cs.LG)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: In this work, we introduce, justify and demonstrate the Corrective Source Term Approach (CoSTA) -- a novel approach to Hybrid Analysis and Modeling (HAM). The objective of HAM is to combine physics-based modeling (PBM) and data-driven modeling (DDM) to create generalizable, trustworthy, accurate, computationally efficient and self-evolving models. CoSTA achieves this objective by augmenting the governing equation of a PBM model with a corrective source term generated using a deep neural network. In a series of numerical experiments on one-dimensional heat diffusion, CoSTA is found to outperform comparable DDM and PBM models in terms of accuracy -- often reducing predictive errors by several orders of magnitude -- while also generalizing better than pure DDM. Due to its flexible but solid theoretical foundation, CoSTA provides a modular framework for leveraging novel developments within both PBM and DDM. Its theoretical foundation also ensures that CoSTA can be used to model any system governed by (deterministic) partial differential equations. Moreover, CoSTA facilitates interpretation of the DNN-generated source term within the context of PBM, which results in improved explainability of the DNN. These factors make CoSTA a potential door-opener for data-driven techniques to enter high-stakes applications previously reserved for pure PBM.
Chemical nanomachining of silicon by gold-catalyzed oxidation
Creators: name: Robinson, J. T.
name: Liddle, J. A.
name: Evans, P. G.
name: Dubon, O. D.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: A chemical nanomachining process for the rapid, scalable production of nanostructure assemblies from silicon-on-insulator is demonstrated. The process is based on the spontaneous, local oxidation of Si induced by Au, which is selectively evaporated onto the Si surface. The Au-catalyzed oxide forms a pattern that serves as a robust mask for the underlying Si, enabling the use of simple wet chemistry to sculpt arrays of nanostructures of diverse shapes including rings, pillars, wires, and nanopores. The remarkable simplicity of this chemical nanomachining process makes it widely accessible as an enabling technique for applications from photonics to biotechnology.
An examination of factors affecting vegetation establishment at the Kitsault minesite
Creators: name: Price, William Andrew
Publisher: name: University of British Columbia
Year: 2010

description: The end land use objective for most mines in British Columbia is a vegetation cover of equal productivity to that which existed prior to mining. The subject of this study was the Kitsault minesite in north coastal B.C.. The project had two components. The objective of the first was to identify plant and soil factors impeding forest development. Vigorous plant growth indicated that a number of materials and methods can be used to achieve a sustained vegetative cover on the wasterock dumps. Studies of similar natural substrates (recently exposed moraines in S.E. Alaska) showed that litter and N additions were the main driving forces for plant and soil development. The two plant species producing the highest amounts of litter and N on the wasterock dumps were Sitka alder and birdsfoot trefoil. While good plant growth was achieved on the dump benches, on the dump slopes it was impeded by the absence of soil-sized particles. The best source of such particles was the incompetent wasterock. The objective of the second part of the study was to evaluate the long term performance of the incompetent wasterock, used as a source of fines, on slopes at the angle of repose. The higher proportion of fine particles in the incompetent wasterock appeared to result from the relatively large proportion of sericite and calcite, most of which ended up in the < 2mm fraction. The modal composition of the incompetent wasterock coarse fragments was 90% quartz and K feldspar. The resilience of these minerals to weathering suggests that further fragmentation, beyond that observed in the first few years, will be limited, and thus the veneer of incompetent wasterock should maintain the angle of repose and maintain good drainage. With regards to nutrient availability, the incompetent wasterock appeared to be a better source of Ca, K, Mg, and P than any of the other wasterock types or the mineral layers in adjacent natural soils. Of the trace elements analysed, levels in the incompetent wasterock were no higher than in the other wasterock types.
Impact of inclusive hadron production data on nuclear gluon PDFs
Creators: name: NCTEQ Collaboration
name: Duwentäster, P.
name: Husová, L. A.
name: Ježo, T.
name: Klasen, M.
name: Kovařík, K.
name: Kusina, A.
name: Muzakka, K. F.
name: Olness, F. I.
name: Schienbein, I.
name: Yu, J. Y.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: A precise knowledge of nuclear parton distribution functions (nPDFs) is -- among other things -- important for the unambiguous interpretation of hard process data taken in pA and AA collisions at the Relativistic Heavy Ion Collider (RHIC) and the Large Hadron Collider (LHC). The available fixed target data for deep inelastic scattering (DIS) and Drell-Yan (DY) lepton pair production mainly constrain the light quark distributions. It is hence crucial to include more and more collider data in global analyses of nPDFs in order to better pin down the different parton flavors, in particular the gluon distribution at small x. To help constrain the nuclear gluon PDF, we extend the nCTEQ15 analysis by including single inclusive hadron (SIH) production data from RHIC (PHENIX and STAR) and LHC (ALICE). In addition to the DIS, DY and SIH data sets, we will also include LHC W/Z production data. As the SIH calculation is dependent on hadronic fragmentation functions (FFs), we use a variety of FFs available in the literature to properly estimate this source of uncertainty. We study the impact of these data on the PDFs, and compare with both the nCTEQ15 and nCTEQ15WZ sets. The calculations are performed using a new implementation of the nCTEQ code (nCTEQ++) including a modified version of INCNLO which allows faster calculations using pre-computed grids. The extension of the nCTEQ15 analysis to include the SIH data represents an important step toward the next generation of PDFs.
description: 23 pages, 17 figures, 5 tables. Minor updates to align with journal version
Testing incompatibility of quantum devices with few states
Creators: name: Heinosaari, Teiko
name: Miyadera, Takayuki
name: Takakura, Ryo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: When observations must come from incompatible devices and cannot be produced by compatible devices? This question motivates two integer valued quantifications of incompatibility, called incompatibility dimension and compatibility dimension. The first one quantifies how many states are minimally needed to detect incompatibility if the test states are chosen carefully, whereas the second one quantifies how many states one may have to use if they are randomly chosen. With concrete examples we show that these quantities have unexpected behaviour with respect to noise.
Advantages of the Kimberly-Rupp Instrument in Spaying Heifers
Creators: name: Rice, P. R.
Publisher: name: American Association of Bovine Practitioners  Proceedings of the Annual Conference
Year: 1981

description: I started using the Kimberly-Rupp technique this year. I found it very advantageous in my practice which is small. Several reasons preparation time on these heifers where in many cases I don't have a squeeze chute, or we have to drag one in from somewhere, is none. We cut them off feed and water for twenty-four hours and preferably 36 hours. There's no clipping to do, and no scrubbing. We just run them in when we are ready to work, and that's that. Just a head catch cenainly works very adequately for doing this technique.
description: American Association of Bovine Practitioners Proceedings of the Annual Conference, 1981
$f(R)$ Dual Theories of Quintessence : Expansion-Collapse Duality
Creators: name: Mukherjee, Dipayan
name: Jassal, H. K.
name: Lochan, Kinjalk
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The accelerated expansion of the universe demands presence of an exotic matter, namely the dark energy. Though the cosmological constant fits this role very well, a scalar field minimally coupled to gravity, or quintessence, can also be considered as a viable alternative for the cosmological constant. We study $f(R)$ gravity models which can lead to an effective description of dark energy implemented by quintessence fields in Einstein gravity, using the Einstein frame-Jordan frame duality. For a family of viable quintessence models, the reconstruction of the $f(R)$ function in the Jordan frame consists of two parts. We first obtain a perturbative solution of $f(R)$ in the Jordan frame, applicable near the present epoch. Second, we obtain an asymptotic solution for $f(R)$, consistent with the late time limit of the Einstein frame if the quintessence field drives the universe. We show that for certain class of viable quintessence models, the Jordan frame universe grows to a maximum finite size, after which it begins to collapse back. Thus, there is a possibility that in the late time limit where the Einstein frame universe continues to expand, the Jordan frame universe collapses. The condition for this expansion-collapse duality is then generalized to time varying equations of state models, taking into account the presence of non-relativistic matter or any other component in the Einstein frame universe. This mapping between an expanding geometry and a collapsing geometry at the field equation level may have interesting potential implications on the growth of perturbations therein at late times.
description: 29 pages, 5 figures, accepted for publication in JCAP
INTERVIEW WITH MS. TAMARA PEMOVSKA, A RESEARCH ASSITANT ON THE IMPULSE PROJECT
Creators: name: Contemporary Psychiatry & Medicine / Savremena Psihijatrija I Medicina
Publisher: name: Zenodo
Year: 2021
Subjects: interview
qualitative research
methodology
IMPULSE project
focus groups

description: The written interview with Tamara Pemovska (TP) was conducted at the beginning of December 2021 by Contemporary Psychiatry and Medicine (CP&M).
Time-covariant Schrödinger equation and invariant decay probability: The $Λ$-Kantowski-Sachs universe
Creators: name: Pailas, Theodoros
name: Dimakis, N.
name: Terzis, Petros A.
name: Christodoulakis, Theodosios
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The system under study is the $Λ$-Kantowski-Sachs universe. Its canonical quantization is provided based on a recently developed method: the singular minisuperspace Lagrangian describing the system, is reduced to a regular (by inserting into the dynamical equations the lapse dictated by the quadratic constraint) possessing an explicit (though arbitrary) time dependence; thus a time-covariant Schrödinger equation arises. Additionally, an invariant (under transformations $t=f(\tilde{t})$) decay probability is defined and thus ``observers'' which correspond to different gauge choices obtain, by default, the same results. The time of decay for a Gaussian wave packet localized around the point $a=0$ (where $a$ the radial scale factor) is calculated to be of the order $\sim 10^{-42}-10^{-41}\mathrm{s}$. The acquired value is near the end of the Planck era (when comparing to a FLRW universe), during which the quantum effects are most prominent. Some of the results are compared to those obtained by following the well known canonical quantization of cosmological systems, i.e. the solutions of the Wheeler-DeWitt equation.
description: Latex2e source file, 21 pages, no figures, minor changes to match published version
The quantum group dual of the first-row subcategory for the generic Virasoro VOA
Creators: name: Koshida, Shinji
name: Kytölä, Kalle
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Algebra (math.QA)
subject: Mathematical Physics (math-ph)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 17B69, 17B37, 81T40

description: In several examples it has been observed that a module category of a vertex operator algebra (VOA) is equivalent to a category of representations of some quantum group. The present article is concerned with developing such a duality in the case of the Virasoro VOA at generic central charge; arguably the most rudimentary of all VOAs, yet structurally complicated. We do not address the category of all modules of the generic Virasoro VOA, but we consider the infinitely many modules from the first row of the Kac table. Building on an explicit quantum group method of Coulomb gas integrals, we give a new proof of the fusion rules, we prove the analyticity of compositions of intertwining operators, and we show that the conformal blocks are fully determined by the quantum group method. Crucially, we prove the associativity of the intertwining operators among the first-row modules, and find that the associativity is governed by the $6j$-symbols of the quantum group. Our results constitute a concrete duality between a VOA and a quantum group, and they will serve as the key tools to establish the equivalence of the first-row subcategory of modules of the generic Virasoro VOA and the category of (type-1) finite-dimensional representations of $\mathcal{U}_{q}(\mathfrak{sl}_{2})$.
description: 79 pages. Accepted for publication in Communications in Mathematical Physics
Possible signatures of unparticles in rare annihilation type B decays
Creators: name: Mohanta, R.
name: Giri, A. K.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We investigate the effect of unparticles in the pure annihilation type decays $B^- \to D_s^-ϕ$ and $ D_s^- K^{*0}$. Since these decays have only annihilation contributions their branching ratios are expected to be very small in the standard model and the direct CP asymmetry parameters to be zero. We find that due to the unparticle effect these branching ratios can be significantly enhanced from their standard model values. Furthermore, sizable nonzero direct CP violation could also be possible in these channels due to the presence of intrinsic CP conserving phase in the unparticle propagator.
description: 9 pages, 2 figures, version to be published in Phys. Rev. D
Quantum transport evidence of topological band structures of kagome superconductor CsV3Sb5
Creators: name: Fu, Yang
name: Zhao, Ningning
name: Chen, Zheng
name: Yin, Qiangwei
name: Tu, Zhijun
name: Gong, Chunsheng
name: Xi, Chuanying
name: Zhu, Xiangde
name: Sun, Yuping
name: Liu, Kai
name: Lei, Hechang
Publisher: name: arXiv
Year: 2021
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We report the transport properties of kagome superconductor CsV$_{3}$Sb$_{5}$ single crystals at magnetic field up to 32 T. The Shubnikov de Haas (SdH) oscillations emerge at low temperature and four frequencies of $F_α=$ 27 T, $F_β=$ 73 T, $F_ε=$ 727 T, and $F_η=$ 786 T with relatively small cyclotron masses are observed. For $F_β$ and $F_ε$, the Berry phases are close to $π$, providing a clear evidence of nontrivial topological band structures of CsV$_{3}$Sb$_{5}$. Furthermore, the consistence between theoretical calculations and experimental results implies that these frequencies can be assigned to the Fermi surfaces locating near the boundary of Brillouin zone and confirms that the structure with an inverse Star of David distortion could be the most stable structure at charge density wave state. These results will shed light on the nature of correlated topological physics in kagome material CsV$_{3}$Sb$_{5}$.
description: 6 pages, 4 figures
Determination of Volume Characteristics of Cells from Dynamical Microscopic Image
Creators: name: Nedzved, Olga
name: Ablameyko, Sergey
Publisher: name: Journal of Applied Computer Science
Year: 2015

description: The algorithm for the determination of 3D-characteristics of a dynamic biological object based on the recovery of a stereo pair was proposed. Images for stereo pair construction were obtained via a single camera before and after the displacement of the object. The algorithm is based on the example of living one-celled organisms.
description: Journal of Applied Computer Science, Vol. 23 No. 2 (2015): Journal of Applied Computer Science
Tetra-Quark Resonances in Lattice QCD
Creators: name: Suganuma, Hideo
name: Tsumura, Kyosuke
name: Ishii, Noriyoshi
name: Okiharu, Fumiko
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We study $qq \bar q \bar q$-type four-quark (4Q) systems in SU(3)$_c$ anisotropic quenched lattice QCD, using the $O(a)$-improved Wilson (clover) fermion at $β=5.75$ on $12^3 \times 96$ with renormalized anisotropy $a_s/a_t=4$.For comparison, we first investigate the lowest $q\bar q$ scalar meson from the connected diagram and find its large mass of about 1.32GeV after chiral extrapolation, and thus the lowest $q\bar q$ scalar meson corresponds to $f_0(1370)$.We investigate the lowest 4Q state in the spatially periodic boundary condition, and find that it is just a two-pion scattering state, as is expected. To examine spatially-localized 4Q resonances, we use the Hybrid Boundary Condition (HBC) method, where anti-periodic and periodic boundary conditions are imposed on quarks and antiquarks, respectively. By applying HBC on a finite-volume lattice, the threshold of the two-meson scattering state is raised up, while the mass of a compact 4Q resonance is almost unchanged.In HBC, the lowest 4Q state appears slightly below the two-meson threshold. To clarify the nature of the 4Q system, we apply the Maximum Entropy Method (MEM) for the 4Q correlator and obtain the spectral function of the 4Q system.From the combination analysis of MEM with HBC, we finally conclude that the 4Q system appears as a two-pion scattering state and there is no spatially-localized 4Q resonance in the quark-mass region of $m_s< m_q <2m_s$.
Graph Search Approach to Rectangle Packing Problem
Creators: name: Korze´N, Marcin
name: Kl˛Esk, Przemysław
Publisher: name: Journal of Applied Computer Science
Year: 2015

description: A rectangle packing problem is considered, where the goal is to suitably arrange a subset of given rectangles within a container so that the area of wastes (uncovered spaces) is the smallest. We propose a reduction of this problem to a graph search problem and show possible solving approaches by means of well known BFS, Dijkstra’s and A_ algorithms. We explain the way we construct search graphs for the problem, taking under consideration two main variants: (1) with arbitrary straight-line cuts, (2) with straight-line cuts which must go along the whole length or width of the remaining container — ‘full cuts’. We also give some insights on: optimization criterion, search stopping condition and heuristics we use. Finally, we present results of experiments carried out
description: Journal of Applied Computer Science, Vol. 23 No. 2 (2015): Journal of Applied Computer Science
Essential genes in the rif region of the Escherichia coli chromosome
Creators: name: Downing, Willa Lee
Publisher: name: University of British Columbia
Year: 2010

description: Regulation of the contiguous secE-nusG and rplKATL-rpoBC operons, found in the rif region at 90 minutes on the Escherichia coli chromosome, was examined. SecE protein is important in protein export. NusG protein is involved in transcription antitermination. The rplKATL-rpoBC gene cluster encodes, respectively, the four 50S subunit ribosomal proteins L11, L1, L10 and L12, and the β and β' subunits of RNA polymerase. The nucleotide sequences of the secE and nusG genes were determined and their transcripts were analyzed by primer extension and SI nuclease mapping. The two genes are cotranscribed, with transcripts initiated at the P[sub EG] promoter and terminated at the Rho-independent terminator overlapping the P[sub L11] promoter. The majority of transcripts are processed in the 5' untranslated leader region by RNaseIII and possibly by a second unidentified nuclease. Transcripts from the rplKATL-rpoBC gene cluster were quantitated by filter hybridization and their ends mapped by SI nuclease protection. The most abundant transcript was the 2600 nucleotide tetracistronic L11-L1-L10-L12 mRNA initiated at the P[sub L11] promoter and terminated at the attenuator in the L12-β intergenic space. Less abundant 1300 nucleotide L11-L1and L10-L12 bicistronic transcripts were also observed. Two 5' ends for the L10-L12 bicistronic mRNA were located, one at the P[sub L10] promoter and the other 150 nucleotides downstream of P[sub L10’], in a region where no promoter activity has been detected. About 80% of the transcripts were terminated at the attenuator; transcripts reading through the attenuator were partially processed by RNaseDI. No other major 5' ends were observed in the L12- β intergenic region. During restriction of RNA polymerase activity, transcriptional disruption of rplKATL and rpoBC results mainly from modulation in the frequency of initiation at P[sub L11] and P[sub L10] promoters, and termination and antitermination at the attenuator. The rplTL transcript leader region is thought to mediate regulation of L10 and L12 synthesis by folding into a translationally closed or open secondary structure (T. Christensen, M. Johnsen, N.P. Fiil and J.D. Friesen (1984) EMBO J. 3, 1609-1612). Point mutants in the leader mRNA were created by site-directed mutagenesis and analyzed in an in vitro translation assay. Preliminary results suggest that alternative secondary or higher order RNA interactions may be involved.
How do NEWA and ERA5 compare for assessing offshore wind resources and wind farm siting conditions?
Creators: name: Meyer, Paul
name: Gottschall, Julia
Publisher: name: Zenodo
Year: 2021
Subjects: Wind Resource Assessment
Measurements
Offshore, Extreme winds

description: Presentation at the WindEurope 2021 Conference and Exhibition: Presented at the 23rd of November 2021 in the Resource Assessment - Modelling & Measurements 1 Session.
 Funded by the Federal Ministry for Economic Affairs and Energy under grant no. 03EE3024
Graph Security Testing
Creators: name: Gieniusz, Tomasz
name: Lewo´N, Robert
name: Małafiejski, Michał
Publisher: name: Journal of Applied Computer Science
Year: 2015

description: In this paper we consider probabilistic approach to the decision problem of security in graphs. In this purpose we define general model (called property tester) and criteria for approximating answers for decision problems. We constructed two property testers and one heuristics for the problem of security in graphs.
description: Journal of Applied Computer Science, Vol. 23 No. 2 (2015): Journal of Applied Computer Science
Quantum non-demolition measurement based on an SU(1,1)-SU(2)-concatenated atom-light hybrid interferometer
Creators: name: Jiao, Gao-Feng
name: Zhang, Keye
name: Chen, L. Q.
name: Yuan, Chun-Hua
name: Zhang, Weiping
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantum non-demolition (QND) measurement is an important tool in the field of quantum information processing and quantum optics. The atom-light hybrid interferometer is of great interest due to its combination of atomic spin wave and optical wave, which can be utilized for photon number QND measurement via the AC-Stark effect. In this paper, we present an SU(1,1)-SU(2)-concatenated atom-light hybrid interferometer, and theoretically study the QND measurement of photon number. Compared to the traditional SU(2) interferometer, the signal-to-noise ratio (SNR) in a balanced case is improved by a gain factor of the nonlinear Raman process (NRP) in this proposed interferometer. Furthermore, the condition of high-quality of QND measurement is analyzed. In the presence of losses, the measurement quality is reduced. We can adjust the gain parameter of the NRP in readout stage to reduce the impact due to losses. Moreover, this scheme is a multiarm interferometer, which has the potential of multiparameter estimation with many important applications in the detection of vector fields, quantum imaging and so on.
The foundation of the hyperunified field theory I -- fundamental building block and symmetry
Creators: name: Wu, Yue-Liang
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Physics (physics.gen-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Starting from the motional property of functional field based on the action principle of path integral formulation while proposing maximum coherence motion principle and maximum locally entangled-qubits motion principle as guiding principles, we show that such a functional field as fundamental building block appears naturally as an entangled qubit-spinor field expressed by a locally entangled state of qubits. Its motion brings about the appearance of Minkowski spacetime with dimension determined by the motion-correlation $\cM_c$-spin charge and the emergence of $\cM_c$-spin/hyperspin symmetry as fundamental symmetry. Intrinsic $\cQ_c$-spin charge displays a periodic feature as the mod 4 qubit number, which enables us to classify all entangled qubit-spinor fields and spacetime dimensions into four categories with respective to four $\cQ_c$-spin charges $\cC_{\cQ_c}=0,1,2,3$. An entangled decaqubit-spinor field in 19-dimensional hyper-spacetime is found to be a hyperunified qubit-spinor field which unifies all discovered leptons and quarks and brings on the existence of mirror lepton-quark states. The inhomogeneous hyperspin symmetry WS(1,18) as hyperunified symmetry in association with inhomogeneous Lorentz-type symmetry PO(1,18) and global scaling symmetry provides a unified fundamental symmetry. The maximum locally entangled-qubits motion principle is shown to lay the foundation of hyperunified field theory, which enables us to comprehend longstanding questions raised in particle physics and quantum field theory.
description: 139 pages, published version
Open Access Student Event - The game of Open Access
Creators: name: de Andrade, Felipe
name: de Wilder, Cathy
name: Van Zimmeren, Esther
name: Zahadzic, Maja
name: Baccarne, Rudi
Publisher: name: Zenodo
Year: 2021
Subjects: Open Access
Open Science
Creative Commons

description: During the Open Access Week 2021 of the University of Antwerp, a team of students , with the support of the staff of the University of Antwerp, set up a “Open Access Student Event” The purpose of the project is to raise awareness of Open Access and Open Science discussions and practices among (under)graduate students. In order to make this experience more enjoyable , we decided to discuss this topic by playing a board game. We adapted previous versions of "The game of Open Access" to the context of the University of Antwerp. The workshop was held in 29-10-2021 as a pilot. We plan to expand it to other campuses and faculties in the upcoming Open Access Weeks. We are making the digital files of the game available under at Zenodo in the hope that other institutions will be interested in reusing them and adapting them to other contexts. Work is available under a CC-BY-NC 4.0 license.

 Link to Open Access Week of the University of Antwerp: https://www.uantwerpen.be/en/library/research/publishing/open-access/open-access-week-2021/
Dark photon limits: a handbook
Creators: name: Caputo, Andrea
name: Millar, Alexander J.
name: O'Hare, Ciaran A. J.
name: Vitagliano, Edoardo
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Experiment (hep-ex)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: The dark photon is a massive hypothetical particle that interacts with the Standard Model by kinetically mixing with the visible photon. For small values of the mixing parameter, dark photons can evade cosmological bounds to be a viable dark matter candidate. Due to the similarities with the electromagnetic signals generated by axions, several bounds on dark photon signals are simply reinterpretations of historical bounds set by axion haloscopes. However, the dark photon has a property that the axion does not: an intrinsic polarisation. Due to the rotation of the Earth, accurately accounting for this polarisation is nontrivial, highly experiment-dependent, and depends upon assumptions about the dark photon's production mechanism. We show that if one does account for the DP polarisation, and the rotation of the Earth, an experiment's discovery reach can be enhanced by over an order of magnitude. We detail the strategies that would need to be taken to properly optimise a dark photon search. These include judiciously choosing the location and orientation of the experiment, as well as strategically timing any repeated measurements. Experiments located at $\pm$35$^\circ$ or $\pm$55$^\circ$ latitude, making three observations at different times of the sidereal day, can achieve a sensitivity that is fully optimised and insensitive to the dark photon's polarisation state, and hence its production mechanism. We also point out that several well-known searches for axions employ techniques for testing signals that preclude their ability to set exclusion limits on dark photons, and hence should not be reinterpreted as such.
description: 32 pages, 11 figures. Code to reproduce the main results can be found at https://github.com/cajohare/DarkPhotonCookbook whereas code and data for making limit plots can be found at https://cajohare.github.io/AxionLimits. Matches published version
The foundation of the hyperunified field theory II -- fundamental interaction and evolving universe
Creators: name: Wu, Yue-Liang
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: In part I of the foundation of the hyperunified field theory, we have shown the presence of entangled hyperqubit-spinor field as fundamental building block with appearance of Minkowski hyper-spacetime as free-motion spacetime and emergence of inhomogeneous hyperspin symmetry as fundamental symmetry. In this paper as part II, we demonstrate by following along gauge invariance principle and scaling invariance hypothesis that the inhomogeneous hyperspin gauge symmetry and scaling gauge symmetry govern fundamental interactions and reveal the nature of gravity and spacetime. With the fiber bundle structure of biframe hyper-spacetime and emergence of non-commutative geometry, we explore methodically the gauge-geometry duality and genesis of gravitational interaction in locally flat gravigauge hyper-spacetime. A whole hyperunified field theory in 19-dimensional hyper-spacetime is established to unify not only all discovered leptons and quarks into hyperunified qubit-spinor field but also all known basic forces into hyperunified interaction governed by inhomogeneous hyperspin gauge symmetry. We present a systematic investigate on the hyperunified field theory with deriving the dynamics of fundamental fields as basic laws of nature and conservation laws relative to basic symmetries and showing Higgs-like bosons and three families of lepton-quark states. We provide a detailed analysis on inflationary early universe with evolving graviscalar field and a discussion on scaling gauge field as dark matter candidate and $\cQ_c$-spin scalar field as source of dark energy.
description: 123 pages, published version
Linear and nonlinear optical spectroscopy of a strongly-coupled microdisk-quantum dot system
Creators: name: Srinivasan, Kartik
name: Painter, Oskar
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: A fiber taper waveguide is used to perform direct optical spectroscopy of a microdisk-quantum-dot system, exciting the system through the photonic (light) channel rather than the excitonic (matter) channel. Strong coupling, the regime of coherent quantum interactions, is demonstrated through observation of vacuum Rabi splitting in the transmitted and reflected signals from the cavity. The fiber coupling method also allows the examination of the system's steady-state nonlinear properties, where saturation of the cavity-QD response is observed for less than one intracavity photon.
description: adjusted references, added minor clarifications
title: PRODUCTIVITY AND EFFICIENCY DIFFERENCE AMONG KENTUCKY GRAIN FARMS
Creators: name: Hussein, Ahmed
Publisher: name: University of Kentucky Libraries
Year: 2021
Subjects: subject: FOS: Agricultural sciences
valueUri: http://www.oecd.org/science/inno/38235147.pdf

description: This paper attempts to estimate productivity and efficiency for Kentucky grain farms by applying a two-stage Date Envelopment Analysis (DEA) and DEA-based Malmquist method. The study covers the years 1999-2015. Also, productivity and efficiency testing hypotheses among different farm sizes and years are estimated. In the first step, productivity and efficiency indices are estimated through deterministic DEA. In the second stage, a panel regression is run with exogenous variables to explain the productivity and efficiency variation. In general small farms were found to be the least scale efficient compared to mid-sized and large farms, even though the results show overall productivity gain and technological improvements during the study. Therefore, small farms need to diversify their scope to survive due to a lack of scale efficiency.
description: © 2021 Ahmed Hussein
Distributed Gaussian polynomials as q-oscillator eigenfunctions
Creators: name: Karabulut, Hasan
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Karabulut and Sibert (\textit{J. Math. Phys}. \textbf{38} (9), 4815 (1997)) have constructed an orthogonal set of functions from linear combinations of equally spaced Gaussians. In this paper we show that they are actually eigenfunctions of a q-oscillator in coordinate representation. We also reinterpret the coordinate representation example of q-oscillator given by Macfarlane as the functions orthogonal with respect to an unusual inner product definition. It is shown that the eigenfunctions in both q-oscillator examples are infinitely degenerate.
Searching for New Physics with $\overline{\mathcal{B}}(B_{s,d}\toμ\barμ)/ΔM_{s,d}$
Creators: name: Bobeth, Christoph
name: Buras, Andrzej J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We reemphasize that the ratio $R_{sμ} \equiv \overline{\mathcal{B}}(B_s\toμ\barμ)/ΔM_s$ is a measure of the tension of the Standard Model (SM) with latest measurements of $\overline{\mathcal{B}}(B_s\toμ\barμ)$ that does not suffer from the persistent puzzle on the $|V_{cb}|$ determinations from inclusive versus exclusive $b\to c\ell\barν$ decays and which affects the value of the CKM element $|V_{ts}|$ that is crucial for the SM predictions of both $\overline{\mathcal{B}}(B_s\toμ\barμ)$ and $ΔM_s$, but cancels out in the ratio $R_{sμ}$. In our analysis we include higher order electroweak and QED corrections und adapt the latest hadronic input to find a tension of about $2σ$ for $R_{sμ}$ measurements with the SM independently of $|V_{ts}|$. We also discuss the ratio $R_{dμ}$ which could turn out, in particular in correlation with $R_{sμ}$, to be useful for the search for New Physics, when the data on both ratios improves. Also $R_{dμ}$ is independent of $|V_{cb}|$ or more precisely $|V_{td}|$.
description: 14 pages, 2 figures; v2: updated experimental input and added discussion on top-quark-mass dependence, added references, conclusions unchanged; v3: matches published version, updated LHCb references
SCUBA Mapping of Outer Galaxy Protostellar Candidates
Creators: name: Mookerjea, B.
name: Sandell, G.
name: Stutzki, J.
name: Wouterloot, J. G. A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We aim to study dust properties of massive star forming regions in the outer Galaxy, in a direction opposite to the Galactic center. We present observations of six outer Galaxy point sources IRAS 01045+6505, 01420+6401, 05271+3059, 05345+3556, 20222+3541 and 20406+4555, taken with the Submillimeter Common-User Bolometer Array (SCUBA) on the James Clerk Maxwell Telescope (JCMT) at 450 and 850 micron. Single temperature greybody models are fitted to the Spectral Energy Distribution of the detected sub-mm cores to derive dust temperature, dust emissivity index and optical depth at 250 micron. The observed radial intensity profiles of the sub-mm cores were fitted with power laws to derive the indices describing the density distribution. At a resolution of 15" all six IRAS point sources show multiple emission peaks. Only four out of fourteen detected sub-mm cores show associated mid-infrared emission. For the sub-mm cores we derive dust temperatures of 32+-5 K and dust emissivity indices between 0.9 and 2.5. The density profiles of the sub-mm cores can be fitted by a single power law distribution with indices -1.5+-0.3, with most cores showing an index of -1.5. This is consistent with most observations of massive star forming regions and supports predictions of models of star formation which consider non-thermal support against gravitational collapse.
description: Accepted for publication in Astronomy & Astrophysics