cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
When Auction Meets Fixed Price: A Theoretical and Empirical Examination of Buy-it-Now Auctions
Creators: name: Wang, Xin
name: Montgomery, Alan
name: Kannan Srinivasan
Publisher: name: Figshare
Year: 2018
Subjects: subject: 150399 Business and Management not elsewhere classified
subject: FOS: Economics and business

description: Recently fixed pricing and auctions have been brought together in a new pricing format that offers
bidders the option of prematurely ending an auction at a fixed price. eBay calls this a “Buy-it-
Now” auction, uBid calls this “UBuy it” and Yahoo auctions refer to this as a “Buy Now”. The
growing popularity of auctions presents an interesting pricing decision for managers: whether to
sell at a fixed price, sell in a regular auction, or to sell through a buy-it-now auction. By posting
a fixed-price at an auction, the seller provides customers a convenient option to buy the item
directly without bidding. However, in doing so, the seller implicitly imposes a maximum bidding
level that could potentially limit revenue. This paper studies this new pricing format and answers
the following research questions: why is fixed price used at traditional auctions, will buy-it-now
increase the seller’s profit, how is an optimal price determined, and how is the buy-it-now decision
influenced by key factors such as the customer’s cost of participating in the auction, the seller’s
reserve price, and the number of potential customers. Our results show that buy-it-now auctions
can increase both customers’ utility and sellers’ profit under certain conditions. We empirically
test the predictions of our theoretical model using data collected from eBay.
Why Productivity Efforts Fail
Creators: name: Goodman, Paul S.
name: Dean, James W.
Publisher: name: Figshare
Year: 2018
Subjects: subject: 150399 Business and Management not elsewhere classified
subject: FOS: Economics and business

description: In the 1970 I S we saw a proliferation of new forms of work Organization projects conceived by labor and management. These projects were aimed at improving the quality of working life (QWL) , the quality of union-management relationships, and organizational effectiveness. In many ways the new forms of work organization were revolutionary in the sense that they represented fundamental changes in how labor and management could work together', how work would be organized, and how organizations might be designed ..
Aspects of Two-photon Absorption of Squeezed Light: the CW limit
Creators: name: Drago, Christian
name: Sipe, John
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present a theoretical analysis of two-photon absorption of classical and squeezed light valid when one-photon absorption to an intermediate state is either resonant or far-detuned from resonance, and in both the low and high intensity regimes. In this paper we concentrate on continuous-wave excitation, although the approach we develop is more general. We calculate the energy removed from an incident field for typical experimental parameters and consider the limiting cases when the photon pairs are narrowband or broadband compared to the molecular linewidths. We find an enhancement of the two-photon absorption due to resonant contributions from the large squeezed light bandwidth and due to photon bunching in the low intensity regime. However, in both cases, for the parameters we choose, the one-photon absorption is the dominant process in the region of parameter space where a large enhancement of the two-photon absorption is possible.
description: To appear in Phys. Rev. A (2022)
MPEC 2023-U48 : 2019 VO4
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2023
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Dynamical spontaneous scalarization in Einstein-Maxwell-scalar theory
Creators: name: Xiong, Wei
name: Liu, Peng
name: Niu, Chao
name: Zhang, Cheng-Yong
name: Wang, Bin
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study the linear instability and the nonlinear dynamical evolution of the Reissner-Nordström (RN) black hole in the Einstein-Maxwell-scalar theory in asymptotic flat spacetime. We focus on the coupling function $f(ϕ)=e^{-bϕ^2}$ which allows both the scalar-free RN solution and scalarized black hole solution. We first present the evolution of system parameters during dynamic scalarization. For parameter regions where spontaneous scalarization occurs, we find that the evolution of the scalar field at the horizon is dominated by the fundamental unstable mode from linear analysis at early times. At late times, the nonlinear evolution can be viewed as the perturbation of scalarized black holes.
description: 17 pages, 17 figures, the version accepted by CPC
Local politics in Cowra Shire: structure, ideology and resources
Creators: name: Gray, Ian
Publisher: name: The Australian National University
Year: 1989
Subjects: subject: Local government Australia Cowra (N.S.W.)
subject: Community power Australia Cowra (N.S.W.)
subject: Rural development Australia Cowra (N.S.W.)
subject: Cowra (N.S.W.) Politics and government

description: The thesis offers explanation for the maintenance of local power relations in a rural community in terms of ideologies and the ways in which they are reflected, responded to and reconstructed in and around a local political system. It does so by developing concepts useful to the study of power processes and using them in analysis of observation of local politics and the ideological climate in which politics are enacted. A history of the locality and discussion of institutional apparatuses of local government move analysis towards political processes, in particular those processes in which the content of politics becomes constrained. That constraint is accounted for in terms of the values and beliefs of local people and their politicians, rather than conscious and intentional individual action. The thesis concludes that beliefs about the nature of local politics and the locality itself structure local politics in such a way that they favour farmers and business people over other identifiable groups.
Equilibrium Fluctuations of DNA Plectonemes
Creators: name: Skoruppa, Enrico
name: Carlon, Enrico
Publisher: name: arXiv
Year: 2022
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Physical sciences

description: Plectonemes are intertwined helically looped domains which form when a DNA molecule is supercoiled, i.e. over- or under-wounded. They are ubiquitous in cellular DNA and their physical properties have attracted significant interest both from the experimental and modeling side. In this work, we investigate fluctuations of the end-point distance z of supercoiled linear DNA molecules subject to external stretching forces. Our analysis is based on a two-phase model, which describes the supercoiled DNA as composed of a stretched and of a plectonemic phase. Several different mechanisms are found to contribute to extension fluctuations, characterized by the extension variance. We find the dominant contribution to the variance to originate from phase-exchange fluctuations, the transient shrinking and expansion of plectonemes, which is accompanied by an exchange of molecular length between the two phases. We perform Monte Carlo simulations of the Twistable Wormlike Chain and analyze the fluctuation of various quantities, which are found to agree with the two-phase model predictions. Furthermore, we show that the extension and its variance at high forces are very well captured by the two-phase model, provided that one goes beyond quadratic approximations.
description: 13 pages, 8 figures
A Method and Case Study of Designing Presentation Module in an SOA-based Solution Using Configurable Architectural Building Blocks (ABBs)
Creators: name: Liang-Jie  Zhang
name: Zhang, Jia
name: Allam, Abdul
Publisher: name: Figshare
Year: 2018
Subjects: subject: Computer Engineering
subject: 80309 Software Engineering
subject: FOS: Computer and information sciences

description: Service-Oriented Architecture (SOA) projects
typically pose challenging requirements on software
developers such as flexibility, speed to market, and
adaptability to ever changing business requirements. In
this paper, we propose a novel method of rapidly
designing presentation module for an SOA-based
solution using fine-grained configurable architectural
building blocks (ABBs). An ABB-based presentation
pattern derived from industry best practices is presented,
associated with a tailored ABB configuration framework.
We also introduce a formal way of modeling ABBs and
their interactions. Real-life experiences of applying our
ABB-based model are condensed into sixteen
architectural decision points, which are further applied
into a variety of SOA solution projects. Experiences
accumulated over these decision points are summarized
into a set of guidelines to help engineers select and
configure ABBs specific to services scenarios and
requirements.
Morphological Classes Display Different Functional Properties, Report from in-vivo "Deep Brain Imaging" using HDEA
Creators: name: delgado ruz, isabel
name: chadderton, Paul
Publisher: name: figshare
Year: 2023
Subjects: Neurosciences not elsewhere classified
Behavioural neuroscience
Computational neuroscience (incl. mathematical neuroscience and theoretical neuroscience)

description: Please make sure to cite our work, so once we get our Nobel Prize ... you also get recognition for your vision.
 Since the beginning
 of neuroscience research,
 the relationship between
 morphology/electrophysiology
 (specific neuronal classes)
 and their respective functional
 role has been known to exist,
 even before proofs could be
 provided.
 Given technological
 restrictions until now it
 was impossible to see directly
 morphological classes in-vivo.
 Visualizing neurons on
 detail was limited to in-vitro
 studies using imaging/optical
 technologies. See Figure
 1 where we show how
 our ”Deep Brain Imaging”
 technique works ([9], [10],
 [11]).

 This is the first experimental
 report in-vivo from cortex
 (Layer 5 from mice Auditory
 Cortex). Where we show
 classified neurons based
 only on morphology as
 visible on HDEA (High
 Density Electrode Array,
 or MEA Multi Electrode
 Arrays) showing how
 these morphological classes
 display indeed different
 functional properties and
 firing properties. Verifying
 the great potential of our
 ”Deep Brain Imaging”
 approach. Since neuronal
 class-functionality and
 relative location of neurons in
 microcircuits are known to be
 strongly related.

 Preprint Draft.
Laser-assisted charged Higgs boson decay in Two Higgs Doublet Model -- type II
Creators: name: Mouslih, S.
name: Jakha, M.
name: Asri, S. El
name: Taj, S.
name: Manaut, B.
name: Benbrik, R.
name: Siher, E
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this paper, we investigate the charged Higgs boson decay in the context of the type-II two-Higgs-doublet model in the presence of a circularly polarized electromagnetic field of laser radiation. The calculations are performed by adopting the Furry picture approach of non-perturbative interactions with the external electromagnetic field. Using the method of exact solutions for charged particles states in the presence of a circularly polarized electromagnetic wave field and evaluating the $S$-matrix elements, an exact analytic expression is derived for the decay width of leptonic, hadronic and bosonic decay modes. The branching ratios of different decay modes with multiple photon emission and absorption from the laser beam are analyzed and found to be dramatically modified in the region of superstrong fields. The dependencies of the decay width on the laser field strength and frequency are also examined. The results obtained may be interesting for future experimental and theoretical investigations.
description: 17 pages, 7 figures, 1 table
The GRAVITY metrology system: narrow-angle astrometry via phase-shifting interferometry
Creators: name: Lippa, M.
name: Blind, N.
name: Gillessen, S.
name: Kok, Y.
name: Weber, J.
name: Eisenhauer, F.
name: Pfuhl, O.
name: Janssen, A.
name: Haug, M.
name: Haußmann, F.
name: Kellner, S.
name: Hans, O.
name: Wieprecht, E.
name: Ott, T.
name: Burtscher, L.
name: Genzel, R.
name: Sturm, E.
name: Hofmann, R.
name: Huber, S.
name: Huber, D.
name: Senftleben, S.
name: Pflüger, A.
name: Greßmann, R.
name: Perrin, G.
name: Perraut, K.
name: Brandner, W.
name: Straubmeier, C.
name: Amorim, A.
name: Schöller, M.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The VLTI instrument GRAVITY will provide very powerful astrometry by combining the light from four telescopes for two objects simultaneously. It will measure the angular separation between the two astronomical objects to a precision of 10 microarcseconds. This corresponds to a differential optical path difference (dOPD) between the targets of few nanometers and the paths within the interferometer have to be maintained stable to that level. For this purpose, the novel metrology system of GRAVITY will monitor the internal dOPDs by means of phase-shifting interferometry. We present the four-step phase-shifting concept of the metrology with emphasis on the method used for calibrating the phase shifts. The latter is based on a phase-step insensitive algorithm which unambiguously extracts phases in contrast to other methods that are strongly limited by non-linearities of the phase-shifting device. The main constraint of this algorithm is to introduce a robust ellipse fitting routine. Via this approach we are able to measure phase shifts in the laboratory with a typical accuracy of lambda/2000 or 1 nanometer of the metrology wavelength.
description: 11 pages, 7 figures
Σχεδιασμός κόμβων σύμφωνα με τον EC-3 μέρος 1-8
Creators: name: Vogiatzis, Tzanetis
Publisher: name: Zenodo
Year: 2010
Subjects: ΜΕΤΑΛΛΙΚΕΣ ΚΑΤΑΣΚΕΥΕΣ
ΣΙΔΗΡΕΣ ΚΑΤΑΣΚΕΥΕΣ
ΕΥΡΩΚΩΔΙΚΑΣ 3
ΔΟΜΙΚΑ ΣΤΟΙΧΕΙΑ ΧΑΛΥΒΑ
ΣΥΝΔΕΣΕΙΣ

description: Στην κατασκευή έργων από δομικό χάλυβα, η βέλτιστη επιλογή δομοστατικών λύσεων όπως π.χ. ο τύπος φορέα, οι συνδέσεις καθώς και η ευκολία ανέγερσης παίζουν σημαντικό ρόλο έτσι ώστε ένα κτίριο να είναι ανταγωνιστικό στην αγορά, τόσο από οικονομικής όσο και από πλευράς ασφάλειας. Σημαντικό στοιχείο του κόστους ενός κτιρίου από δομικό χάλυβα αποτελούν οι συνδέσεις. Η επιρροή τους αντικατοπτρίζεται σε όλα τα στάδια της παραγωγής ενός μεταλλικού έργου, από την ανάλυση, τον σχεδιασμό, την σύνταξη των κατασκευαστικών σχεδίων έως την διαμόρφωση των μεταλλικών στοιχείων στο εργοστάσιο και την τελική ανέγερση του φορέα.
The width difference in the $B-\bar{B}$ system at next-to-next-to-leading order of QCD
Creators: name: Gerlach, Marvin
name: Nierste, Ulrich
name: Shtabovenko, Vladyslav
name: Steinhauser, Matthias
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We extend the theoretical prediction for the width difference $ΔΓ_q$ in the mixing of neutral $B$ mesons in the Standard Model to next-to-next-to-leading order in $α_s$. To this aim we calculate three-loop diagrams with two $|ΔB|=1$ current-current operators analytically. In the matching between $|ΔB|=1$ and $|ΔB|=2$ effective theories we regularize the infrared divergences dimensionally and take into account all relevant evanescent operators. Further elements of the calculation are the two-loop renormalization matrix $Z_{ij}$ for the $|ΔB|=2$ operators and the $\mathcal{O}(α_s^2)$ corrections to the finite renormalization that ensures the $1/m_b$ suppression of the operator $R_0$ at two-loop order. Our theoretical prediction reads $ΔΓ_s/ΔM_s = {(4.33\pm 0.93)\cdot 10^{-3}}$ if expressed in terms of the bottom mass in the $\overline{\rm MS}$ scheme and $ΔΓ_s/ΔM_s = {(4.20\pm 0.95)\cdot 10^{-3}}$ for the use of the potential-subtracted mass. While the controversy on $|V_{cb}|$ affects both $ΔΓ_s$ and $ΔM_s$, the ratio $ΔΓ_s/ΔM_s$ is not affected by the uncertainty in $|V_{cb}|$ .
description: 7 pages, 4 figures
A matter of principle and practice: the sentencing of Australian Aborigines in the Northern Territory Supreme Court 1974-1982
Creators: name: Coles, Gregory W.
Publisher: name: The Australian National University
Year: 1995
Subjects: Sentences (Criminal procedure)
Australia
Northern Territory
Aboriginal Australians
Criminal justice system

description: When an individual violates the criminal code of a western society, that society responds through the formal agency of the court by sanctioning the individual. The imposition of these sanctions implies the notions of discretion and decision making.
Accelerating Bayesian Network Parameter Learning Using Hadoop and MapReduce
Creators: name: Aniruddha  Basak
name: Brinster, Irina
name: Xianheng  Ma
name: Mengshoel, Ole J
Publisher: name: Figshare
Year: 2018
Subjects: subject: Computer Engineering
subject: 80309 Software Engineering
subject: FOS: Computer and information sciences

description: Learning conditional probability tables of large Bayesian Networks (BNs) with hidden nodes using the Expectation Maximization algorithm is heavily computationally intensive. There are at least two bottlenecks, namely the potentially huge data set size and the requirement for computation and memory resources. This work applies the distributed computing framework MapReduce to Bayesian parameter learning from complete and incomplete data. We formulate both traditional parameter learning (complete data) and the classical Expectation Maximization algorithm (incomplete data) within the MapReduce framework. Analytically and experimentally we analyze the speed-up that can be obtained by means of MapReduce. We present the details of our Hadoop implementation, report speed-ups versus the sequential case, and compare various Hadoop configurations for experiments with Bayesian networks of different sizes and structures. For Bayesian networks with large junction trees, we surprisingly find that MapReduce can give a speed-up compared to the sequential Expectation Maximization algorithm for learning from 20 cases or fewer.  The benefit of MapReduce for learning various Bayesian networks is investigated on data sets with up to 1,000,000 records.
The Key Driver Implementation Scale (KDIS) for practice facilitators: Psychometric testing in the “Southeastern collaboration to improve blood pressure control” trial
Creators: name: Nicholson, Liza
name: Craft, Macie
name: Wang, Mian
name: Richman, Erica
name: Peaden, Shannon
name: Mackey, Monique
name: Shea, Christopher M.
name: Cummings, Doyle M.
name: Cherrington, Andrea L.
name: Halladay, Jacqueline R.
name: Safford, Monika M.
name: Stover, Angela M.
name: Rees, Jennifer
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2022

description: Background Practice facilitators (PFs) provide tailored support to primary care practices to improve the quality of care delivery. Often used by PFs, the “Key Driver Implementation Scale” (KDIS) measures the degree to which a practice implements quality improvement activities from the Chronic Care Model, but the scale’s psychometric properties have not been investigated. We examined construct validity, reliability, floor and ceiling effects, and a longitudinal trend test of the KDIS items in the Southeastern Collaboration to Improve Blood Pressure Control trial. Methods The KDIS items assess a practice’s progress toward implementing: a clinical information system (using their own data to drive change); standardized care processes; optimized team care; patient self-management support; and leadership support. We assessed construct validity and estimated reliability with a multilevel confirmatory factor analysis (CFA). A trend test examined whether the KDIS items increased over time and estimated the expected number of months needed to move a practice to the highest response options. Results PFs completed monthly KDIS ratings over 12 months for 32 primary care practices, yielding a total of 384 observations. Data was fitted to a unidimensional CFA model; however, parameter fit was modest and could be improved. Reliability was 0.70. Practices started scoring at the highest levels beginning in month 5, indicating low variability. The KDIS items did show an upward trend over 12 months (all p < .001), indicating that practices were increasingly implementing key activities. The expected time to move a practice to the highest response category was 9.1 months for standardized care processes, 10.2 for clinical information system, 12.6 for self-management support, 13.1 for leadership, and 14.3 months for optimized team care. Conclusions The KDIS items showed acceptable reliability, but work is needed in larger sample sizes to determine if two or more groups of implementation activities are being measured rather than one.
Rat brainstem stranscriptome analysis after acute stress
Creators: name: 德米特里(Dmitriy Lanshakov)
Publisher: name: CNGB
Year: 2023
Subjects: Genome sequencing and assembly
Other
sorted and aligned bam files
Monoisolate
Medical

description: In this work, we tried to emphasize whole transcriptome expression changes in the Wistar rats brainstem two hours after acute stress.Also we conducted cDNA libraries normalization with duplex specific nuclease and compared results. On the basis of our RNAseq data, we chose reference genes for RT-qPCR best suitable for experiments with acute stress.
Power Module Heat Sink Design Optimization with Ensembles of Data-Driven Polynomial Chaos Surrogate Models
Creators: name: Loukrezis, Dimitrios
name: De Gersem, Herbert
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computational Engineering, Finance, and Science (cs.CE)
subject: FOS: Computer and information sciences

description: We consider the problem of optimizing the design of a heat sink used for cooling an insulated gate bipolar transistor (IGBT) power module. The thermal behavior of the heat sink is originally estimated using a high-fidelity computational fluid dynamics (CFD) simulation, which renders numerical optimization too computationally demanding. To enable optimization studies, we substitute the CFD simulation model with an inexpensive polynomial surrogate model that approximates the relation between the device's design features and a relevant thermal quantity of interest. The surrogate model of choice is a data-driven polynomial chaos expansion (DD-PCE), which learns the aforementioned relation by means of polynomial regression. Advantages of the DD-PCE include its applicability in small-data regimes and its easily adaptable model structure. To address the issue of model-form uncertainty and model robustness in view of limited training and test data, ensembles of DD-PCEs are generated based on data re-shuffling. Then, using the full ensemble of surrogate models, the surrogate-based predictions are accompanied by uncertainty metrics such as mean value and variance. Once trained and tested in terms of accuracy and robustness, the ensemble of DD-PCE surrogates replaces the high-fidelity simulation model in optimization algorithms aiming to identify heat sink designs that optimize the thermal behavior of the IGBT under geometrical and operational constraints. Optimized heat sink designs are obtained for a computational cost much smaller than utilizing the original model in the optimization procedure. Due to ensemble modeling, the optimization results can also be assessed in terms of uncertainty and robustness. Comparisons against alternative surrogate modeling techniques illustrate why the DD-PCE should be preferred in the considered setting.
description: 20 pages, 4 figures, 7 tables
Additional file 18 of Non-canonical two-step biosynthesis of anti-oomycete indole alkaloids in Kickxellales
Creators: name: Rassbach, Johannes
name: Hilsberg, Nathalie
name: Haensch, Veit G.
name: Dörner, Sebastian
name: Gressler, Julia
name: Sonnabend, Robin
name: Semm, Caroline
name: Voigt, Kerstin
name: Hertweck, Christian
name: Gressler, Markus
Publisher: name: figshare
Year: 2024
Subjects: subject: Microbiology
subject: FOS: Biological sciences
subject: Genetics
subject: Organic Chemistry
subject: FOS: Chemical sciences

description: Additional file 18: Figure S16. 1H-13C HMBC spectrum of 5 in DMSO-d6.
A mitophagy sensor PPTC7 integrates homeostatic and physiological signals to regulate mitophagy and mitochondrial mass
Creators: name: 孙雨秋(Sun Yuqiu)
Publisher: name: CNGB
Year: 2023
Subjects: Raw sequence reads
Monoisolate

description: Mitophagy mediated by receptors BNIP3 and NIX critically regulates mitochondrial mass under developmental and pathophysiological conditions. Cellular BNIP3 and NIX levels are tightly controlled by SCFFBXL4-mediated ubiquitination to prevent excessive mitophagy and lethal disease. Here we report that knockout of PPTC7, a mitochondrial matrix protein, hyperactivates BNIP3/NIX-mediated mitophagy in vitro and in vivo. Biochemically, the PPTC7 precursor is trapped by BNIP3 and NIX to mitochondrial outer-membrane, where PPTC7 scaffolds the assembly of the substrate-PPTC7-SCFFBXL4 holocomplex to degrade BNIP3 and NIX, forming a homeostatic regulatory loop. PPTC7 possesses an unusually weak mitochondrial targeting sequence to facilitate its outer-membrane retention and mitophagy control. Upon starvation, PPTC7 is transcriptionally upregulated in mouse liver to repress mitophagy, which critically maintains hepatic mitochondrial mass, bioenergetics and gluconeogenesis. Collectively, PPTC7 functions as a mitophagy sensor that integrates homeostatic and physiological signals to dynamically control BNIP3 and NIX degradation, thereby maintaining proper mitochondrial mass and cellular homeostasis.
Additional file 19 of Non-canonical two-step biosynthesis of anti-oomycete indole alkaloids in Kickxellales
Creators: name: Rassbach, Johannes
name: Hilsberg, Nathalie
name: Haensch, Veit G.
name: Dörner, Sebastian
name: Gressler, Julia
name: Sonnabend, Robin
name: Semm, Caroline
name: Voigt, Kerstin
name: Hertweck, Christian
name: Gressler, Markus
Publisher: name: figshare
Year: 2024
Subjects: subject: Microbiology
subject: FOS: Biological sciences
subject: Genetics
subject: Organic Chemistry
subject: FOS: Chemical sciences

description: Additional file 19: Figure S17. 1H-1H TOCSY spectrum of 5 in DMSO-d6.
Real-time flare detection in ground-based H$α$ imaging at Kanzelhöhe Observatory
Creators: name: Pötzi, Werner
name: Veronig, Astrid M.
name: Riegler, Gernot
name: Amerstorfer, Ute
name: Pock, Thomas
name: Temmer, Manuela
name: Polanec, Wolfgang
name: Baumgartner, Dietmar J.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Kanzelhöhe Observatory (KSO) regularly performs high-cadence full-disk imaging of the solar chromosphere in the H$α$ and CaIIK spectrallines as well as the solar photosphere in white-light. In the frame of ESA's Space Situational Awareness (SSA) programme, a new system for real-time H$α$ data provision and automatic flare detection was developed at KSO. The data and events detected are published in near real-time at ESA's SSA Space Weather portal (http://swe.ssa.esa.int/web/guest/kso-federated). In this paper, we describe the H$α$ instrument, the image recognition algorithms developed, the implementation into the KSO H$α$ observing system and present the evaluation results of the real-time data provision and flare detection for a period of five months. The H$α$ data provision worked in $99.96$% of the images, with a mean time lag between image recording and online provision of 4s. Within the given criteria for the automatic image recognition system (at least three H$α$ images are needed for a positive detection), all flares with an area $\ge$50 micro-hemispheres and located within $60^\circ$ of the Sun's center that occurred during the KSO observing times were detected, in total a number of 87 events. The automatically determined flare importance and brightness classes were correct in $\sim$85%. The mean flare positions in heliographic longitude and latitude were correct within $\sim$1$^\circ$. The median of the absolute differences for the flare start times and peak times from the automatic detections in comparison to the official NOAA (and KSO) visual flare reports were 3 min (1 min).
description: 29 pages, 15 figures, 5 tables; Accepted for Solar Physics, Nov 2014
Gauge Symmetry Breaking in Flux Compactification with Wilson-line Scalar Condensate
Creators: name: Akamatsu, Kento
name: Hirose, Takuya
name: Maru, Nobuhito
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We discuss the gauge symmetry breaking of six dimensional theories in flux compactification with a magnetic flux background and a constant vacuum expectation value (VEV) for the scalar fields, which are zero modes of extra spatial components of the gauge field. Although the effective potential for the scalar fields are known not to be generated classically and radiatively in a magnetic flux background only, the one-loop effective potential is shown to be generated by the effects of the non-zero constant VEV. As illustrations, we calculate the one-loop effective potential in SU(2) and SU(3) Yang-Mills theories. In both cases, we find that the potential minimum is located at non-zero VEV and the gauge symmetry breaking takes place.
description: 34 pages, 5 figures, published version in PRD
BARVINN: Arbitrary Precision DNN Accelerator Controlled by a RISC-V CPU
Creators: name: Askarihemmat, Mohammadhossein
name: Wagner, Sean
name: Bilaniuk, Olexa
name: Hariri, Yassine
name: Savaria, Yvon
name: David, Jean-Pierre
Publisher: name: arXiv
Year: 2023
Subjects: subject: Hardware Architecture (cs.AR)
subject: FOS: Computer and information sciences
subject: C.1.3; C.3

description: We present a DNN accelerator that allows inference at arbitrary precision with dedicated processing elements that are configurable at the bit level. Our DNN accelerator has 8 Processing Elements controlled by a RISC-V controller with a combined 8.2 TMACs of computational power when implemented with the recent Alveo U250 FPGA platform. We develop a code generator tool that ingests CNN models in ONNX format and generates an executable command stream for the RISC-V controller. We demonstrate the scalable throughput of our accelerator by running different DNN kernels and models when different quantization levels are selected. Compared to other low precision accelerators, our accelerator provides run time programmability without hardware reconfiguration and can accelerate DNNs with multiple quantization levels, regardless of the target FPGA size. BARVINN is an open source project and it is available at https://github.com/hossein1387/BARVINN.
description: 7 pages. Accepted for publication in the 2023, 28th Asia and South Pacific Design Automation Conference (ASP-DAC 2023)
Comparative analysis of national reports: the case of the Erasmus+ ECOLHE Project
Creators: name: Capogna, Stefania
name: De Angelis, Maria Chiara
name: Greco, Francesca
Publisher: name: ECOLHE
Year: 2023

description: European projects lend themselves to facing a comparative analysis through qualitative, quantitative, or mixed methods. Among the various elements that organise the comparison, an important component is the cultural dimension since it organises social actors’ practices, often carried out with qualitative methods. However, in line with the literature, this dimension is detectable through text mining methods since it determines the choice and association of the words used to organise communication. This work proposes a text-mining procedure for comparing the documents’ symbolic-cultural categories, in line with the theory of translation. In particular, Emotional Text Mining was used to study the cultural differences in digital development in Higher Education among countries through the analysis of the country partners’ report of the Erasmus+ Project ECOLHE (Empower Competences for on life Learning in Higher Education1) to identify the symbolic-cultural categories and the representations of digital development. Results have important implications for identifying digital culture development indicators starting from texts, an aspect that could be considered relevant for policymakers in the context of Erasmus+ projects.
description: ECOLHE, ECOLHE International Conference Proceedings
Generating extremely large-volume reionisation simulations
Creators: name: Greig, Bradley
name: Wyithe, J. Stuart B.
name: Murray, Steven G.
name: Mutch, Simon J.
name: Trott, Cathryn M.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Preparing for the first detection of the cosmic 21-cm signal from large-scale interferometer experiments requires rigorous testing of the data analysis and reduction pipelines. To validate that these pipelines do not erroneously remove or add features that can mimic the cosmic signal (e.g. from side-lobes or large-scale power leakage), we require reionisation simulations larger than the experiments primary field of view. For an experiment such as the MWA, with a field of view of $\sim25^{2}$ deg.$^{2}$, this would require a simulation of several Gpcs, which is currently infeasible. To overcome this, we developed a simplified version of the semi-numerical reionisation simulation code 21CMFAST preferencing large volumes over some physical accuracy by assuming linear theory for structure formation. With this, we constructed a 7.5 Gpc comoving volume with voxel resolution of $\sim1.17$ cMpc tailored specifically to the binned spectral resolution of the MWA. This simulation was used for validating the pipelines for the 2020 MWA 21-cm power spectrum (PS) upper limits (Trott et al.). We then use this large-volume simulation to explore: (i) whether smaller volume simulations are biased by the missing large-scale modes, (ii) non-Gaussianity in estimates of the cosmic variance, (iii) biases in the recovered 21-cm PS following foreground wedge removal and (iv) the impact of tiling smaller volume simulations to achieve extremely large volumes. In summary, we find: (i) no biases from missing large-scale power, (ii) significant contribution from non-Gaussianity in the cosmic variance as expected following Mondal et al. (iii) an over-estimate of the 21-cm PS of 10-20 per cent following wedge mode excision for our particular model and (iv) tiling smaller volume simulations under-estimates the large-scale power and also the estimated cosmic variance.
description: 13 pages, 9 figures and 1 table. Submitted to MNRAS, comments welcome
Υψηλά κτίρια ανά τον κόσμο
Creators: name: Vogiatzis, Tzanetis
Publisher: name: Zenodo
Year: 2011
Subjects: ΜΕΤΑΛΛΙΚΕΣ ΚΑΤΑΣΚΕΥΕΣ
ΣΙΔΗΡΕΣ ΚΑΤΑΣΚΕΥΕΣ
ΚΑΤΑΣΚΕΥΕΣ ΑΠΟ ΔΟΜΙΚΟ ΧΑΛΥΒΑ
ΕΥΡΩΚΩΔΙΚΑΣ 3
ΔΟΜΙΚΑ ΣΤΟΙΧΕΙΑ ΧΑΛΥΒΑ

description: Η κατασκευή των ουρανοξυστών παραδοσιακά έχει συνδεθεί με την ευρωστία και την οικονομική άνθηση των χωρών στις οποίες κατασκευάζονται αλλά παράλληλα επιδεικνύουν και τα τελευταία επιτεύγματα στο χώρο της αρχιτεκτονικής, της μηχανικής καθώς και των ηλεκτρομηχανολογικών εγκαταστάσεων. Η κατασκευή του πολυθρύλητου Barj-Khalifa Dubai ξεπέρασε κάθε κατασκευαστικό όριο φθάνοντας σε ένα ύψος πέρα των 800. Αξίζει να δούμε την ιστορική εξέλιξη όπως αυτή καταγράφεται από το CTBUH. Παρατηρούμε ότι χρειάζονται περίπου 40 χρόνια προκειμένου να εισάγουμε νέες τεχνικές μελέτης και κατασκευής έτσι ώστε να ξεπεράσουμε το προηγούμενο επίτευγμα. Ουσιαστικά μια «επαγγελματική γενιά» θέτει τις βάσεις ανάπτυξης η επόμενη εφαρμόζει και από την συσσωρευθήσα εμπειρία σε κάποια στιγμή η αλληλεπίδραση των γενεών επέφερε την κατασκευή ενός πύργου
 ορόσημο του Burj-Khalifa Dubai. Ορόσημα αποτέλεσαν η ανέγερση του Empire State Building (1931, New York), του
 World Trade Center (1972, New York) και του προαναφερθέντος Burj Dubai.Το σύνολο των στοιχείων της εργασίας έχουν ληφθεί από τον ιστοχώρο του φορέα που ασχολείται με την ανάπτυξη και τον σχεδιασμό ψηλών κτιρίων, υπό την ονομασία Council on Tall Buildings and Urban Habitat, CTBUH, με έδρα το Σικάγο των Η.Π.Α. και παραρτήματα σε όλες τις Ηπείρους.
Tunable large spin Nernst effect in a two-dimensional magnetic bilayer
Creators: name: Go, Gyungchoon
name: Kim, Se Kwon
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We theoretically investigate topological spin transport of the magnon-polarons in bilayer magnet with two-dimensional square lattices. Our theory is motivated by recent reports on the van der Waals magnets which show the reversible electrical switching of the interlayer magnetic order between antiferromagnetic and ferromagnetic orders. The magnetoelastic interaction opens band gaps and allows the interband transition between different excitation states. In the layered antiferromagnet, due to the interband transition between the magnon-polaron states, the spin Berry curvature which allows the topological spin transport occurs even if the time-reversal symmetry is preserved. We find that the spin Berry curvature in the layered antiferromagnet is very large due to the small energy spacing between two magnon-like states. As a result, the spin Nernst conductivity shows sudden increase (or decrease) at the phase transition point between ferromagnetic and antiferromagnetic phases. Our result suggest that the ubiquity of tunable topological spin transports in two dimensional magnetic systems.
description: 12 pages, 7 figures
Why Private Labels Show Long-Term Market Share Evolution
Creators: name: Hoch, Stephen J.
name: Montgomery, Alan
name: Park, Young-Hoon
Publisher: name: Figshare
Year: 2018
Subjects: subject: 150399 Business and Management not elsewhere classified
subject: FOS: Economics and business

description: Previous research has shown that most consumer packaged goods markets are in long-run
competitive equilibrium. In most categories, a given brand’s market share is stationary, showing
remarkable stability over long time horizons (10 years). This empirical generalization has been
attributed to consumer inertia and to competitive reaction elasticities that lead to offsetting
marketing spending which nullify attempts by one brand to take unilateral action to increase
share. We find a clear exception to this rule — during the period 1987-94 the retailer’s private
label consistently showed positive market share evolution. In 225 consumer packaged goods
categories, private labels trended upward 86% of the time. The trend persisted even after
controlling for marketing spending by both national and store brands. We consider the viability
of alternative explanations including changes in consumer and national brand behavior and find
that none of them can adequately account for the trend in private label share. We offer an
analytical explanation and empirical support for why private labels can grow even though
national brands shares are relatively stable. We argue that the retailer is in the best position to
opportunistically appropriate different sources of category growth because not only does it
control it own marketing spending, it also exerts some influence over the ultimate marketplace
spending of their national brand competitors.
Orbital Migration of Protoplanets in a Marginally Gravitationally Unstable Disk. II. Migration, Merging, and Ejection
Creators: name: Boss, Alan P.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Protoplanets formed in a marginally gravitationally unstable (MGU) disk by either core accretion or disk instability will be subject to dynamical interactions with massive spiral arms, possibly resulting in inward or outward orbital migration, mergers with each other, or even outright ejection from the protoplanetary system. The latter process has been hypothesized as a possible formation scenario for the unexpectedly high frequency of unbound gas giant exoplanets (free floating planets, FFP). Previous calculations with the EDTONS fixed grid three dimensional (3D) hydrodynamics code found that protoplanets with masses from 0.01 $M_\oplus$ to 3 $M_{Jup}$ could undergo chaotic orbital evolutions in MGU disks for $\sim$ 1000 yrs without undergoing monotonic inward or outward migration. Here the Enzo 2.5 adaptive mesh refinement (AMR) 3D hydrodynamics code is used to follow the formation and orbital evolution of protoplanets in MGU disks for up to 2000 yrs. The Enzo results confirm the basic disk fragmentation results of the EDTONS code, as well as the absence of monotonic inward or outward orbital migration. In addition, Enzo allows protoplanet mergers to occur, unlike EDTONS, resulting in a significant decrease in the number of protoplanets that survive for 1000 to 2000 yrs in the Enzo models. These models also imply that gas giants should be ejected frequently in MGU disks that fragment into large numbers of protoplanets, supporting ejection as a possible source mechanism for the observed FFPs.
description: 27 pages, 10 figures, 2 tables, in press, Astrophysical Journal
Modelling circumplanetary ejecta clouds at low altitudes: a probabilistic approach
Creators: name: Christou, Apostolos A.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: A model is presented of a ballistic, collisionless, steady state population of ejecta launched at randomly distributed times and velocities and moving under constant gravity above the surface of an airless planetary body. Within a probabilistic framework, closed form solutions are derived for the probability density functions of the altitude distribution of particles, the distribution of their speeds in a rest frame both at the surface and at altitude and with respect to a moving platform such as an orbiting spacecraft. These expressions are validated against numerically-generated synthetic populations of ejecta under lunar surface gravity. The model is applied to the cases where the ejection speed distribution is (a) uniform (b) a power law. For the latter law, it is found that the effective scale height of the ejecta envelope directly depends on the exponent of the power law and increases with altitude. The same holds for the speed distribution of particles near the surface. Ejection model parameters can, therefore, be constrained through orbital and surface measurements. The scope of the model is then extended to include size-dependency of the ejection speed and an example worked through for a deterministic power law relation. The result suggests that the height distribution of ejecta is a sensitive proxy for this dependency.
description: Accepted for publication in Icarus; 35 pages, 10 figures
University governance facing challenges of digital transformation. Some results of the field research
Creators: name: Proietti, Emanuela
Publisher: name: ECOLHE
Year: 2023

description: Some studies show that most European HE institutions haven't made much progress in changing the courses they offer to a student centred learning model that can take into account developments and opportunities in technology-enhanced education. Challenges posed by digital transformation to universities do not regard only teaching and learning processes. There are different levels of institutional and organizational action which produce effects on these processes. The paper presents some results of a part of the field research of the Erasmus+ Project ECOLHE. Six case studies have been carried out. They have aimed to investigate how the universities involved develop their strategic approaches to digitalisation. The results presented refer to the focus groups conducted in 2021.
description: ECOLHE, ECOLHE International Conference Proceedings
Natural Boundary for a Sum Involving Toeplitz Determinants
Creators: name: Tracy, Craig A.
name: Widom, Harold
Publisher: name: arXiv
Year: 2015
Subjects: subject: Mathematical Physics (math-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Functional Analysis (math.FA)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 47B35, 82B20

description: In the theory of the two-dimensional Ising model, the diagonal susceptibility is equal to a sum involving Toeplitz determinants. In terms of a parameter k the diagonal susceptibility is analytic inside the unit circle, and the authors proved the conjecture that this function has the unit circle as a natural boundary. The symbol of the Toepltiz determinants was a k-deformation of one with a single singularity on the unit circle. Here we extend the result, first, to deformations of a larger class of symbols with a single singularity on the unit circle, and then to deformations of (almost) general Fisher-Hartwig symbols.
description: 17 pages. arXiv admin note: text overlap with arXiv:1307.5913
GigaPan Imagery and Archaeology at the Sanctuary of the Great Gods, Samothrace
Creators: name: Hertzberg, Vicki Stover
name: Page, Michael C.
name: Wescoat, Bonna Daix
Publisher: name: Figshare
Year: 2018
Subjects: subject: 80106 Image Processing
subject: FOS: Computer and information sciences

description: In this paper we describe the use of gigapixel imagery at the Sanctuary of the Great Gods, an archaeological site
on the island of Samothrace, Greece. The Sanctuary was the home of a secret cult that was a particular favorite
of Macedonian royalty during the 4th and 3rd centuries BC. Despite the lack of any current structures remaining
erect, the dozen buildings are remarkably well preserved and are spectacular examples of classical Greek
architecture. We are employing a number of sophisticated advanced visualization tools, including a 3-D
reconstruction of the site, computer-animated fly-throughs, and an interactive map. We have undertaken a
topographic survey and are integrating georeferenced GigaPans into a geographic information system (GIS). This
system will allow us to return to the site in future years, capturing the same scene, thus better informing the
upcoming site management plan and allowing us to observe change over time.