cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Prevalence, Common Causes and Effects of Technical Debt: Results from a Family of Surveys with the IT Industry
Creators: name: Ramač, Robert
name: Mandić, Vladimir
name: Taušan, Nebojša
name: Rios, Nicolli
name: Freire, Sávio
name: Pérez, Boris
name: Castellanos, Camilo
name: Correal, Darío
name: Pacheco, Alexia
name: Lopez, Gustavo
name: Izurieta, Clemente
name: Seaman, Carolyn
name: Spinola, Rodrigo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: The technical debt (TD) metaphor describes actions made during various stages of software development that lead to a more costly future regarding system maintenance and evolution. According to recent studies, on average 25% of development effort is spent, i.e. wasted, on TD caused issues in software development organizations. However, further research is needed to investigate the relations between various software development activities and TD. The objective of this study is twofold. First, to get empirical insight on the understanding and the use of the TD concept in the IT industry. Second, to contribute towards precise conceptualization of the TD concept through analysis of causes and effects. In order to address the research objective a family of surveys was designed as a part of an international initiative that congregates researchers from 12 countries -- InsighTD. At country level, national teams ran survey replications with industry practitioners from the respective countries. In total 653 valid responses were collected from 6 countries. Regarding the prevalence of the TD concept 22% of practitioners have only theoretical knowledge about it, and 47% have some practical experiences with TD identification or management. Further analysis indicated that senior practitioners who work in larger organizations, larger teams, and on larger systems are more likely to be experienced with TD management. Time pressure or deadline was the single most cited cause of TD. Regarding the effects of TD: delivery delay, low maintainability, and rework were the most cited. InsighTD is the first family of surveys on technical debt in software engineering. It provided a methodological framework that allowed multiple replication teams to conduct research activities and to contribute to a single dataset. Future work will focus on more specific aspects of TD management.
description: Journal of Systems and Software
Continuous control of classical-quantum crossover by external high pressure in the coupled chain compound CsCuCl$_3$
Creators: name: Yamamoto, Daisuke
name: Sakurai, Takahiro
name: Okuto, Ryosuke
name: Okubo, Susumu
name: Ohta, Hitoshi
name: Tanaka, Hidekazu
name: Uwatoko, Yoshiya
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: In solid materials, the parameters relevant to quantum effects, such as the spin quantum number, are basically determined and fixed at the chemical synthesis, which makes it challenging to control the amount of quantum correlations. We propose and demonstrate a method for active control of the classical-quantum crossover in magnetic insulators by applying external pressure. As a concrete example, we perform high-field, high-pressure measurements on CsCuCl$_3$, which has the structure of weakly-coupled spin chains. The magnetization process experiences a continuous evolution from the semi-classical realm to the highly-quantum regime with increasing pressure. Based on the idea of "squashing" the spin chains onto a plane, we characterize the change in the quantum correlations by the change in the value of the local spin quantum number of an effective two-dimensional model. This opens a way to access the tunable classical-quantum crossover of two-dimensional spin systems by using alternative systems of coupled-chain compounds.
description: 11 + 3 pages, 10 + 2 figures
The impact of metallicity on nova populations
Creators: name: Kemp, Alex J.
name: Karakas, Amanda I.
name: Casey, Andrew R.
name: Kobayashi, Chiaki
name: Izzard, Robert G.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The metallicity of a star affects its evolution in a variety of ways, changing stellar radii, luminosities, lifetimes, and remnant properties. In this work, we use the population synthesis code binary_c to study how metallicity affects novae in the context of binary stellar evolution. We compute a 16-point grid of metallicities ranging from $Z=10^{-4}$ to 0.03, presenting distributions of nova white dwarf masses, accretion rates, delay-times, and initial system properties at the two extremes of our 16-point metallicity grid. We find a clear anti-correlation between metallicity and the number of novae produced, with the number of novae at $Z=0.03$ roughly half that at $Z=10^{-4}$. The white dwarf mass distribution has a strong systematic variation with metallicity, while the shape of the accretion rate distribution is relatively insensitive. We compute a current nova rate of approximately 33 novae per year for the Milky Way, a result consistent with observational estimates relying on extra-Galactic novae but an under-prediction relative to observational estimates relying on Galactic novae. However, the shape of our predicted Galactic white dwarf mass distribution differs significantly to existing observationally derived distributions, likely due to our underlying physical assumptions. In M31, we compute a current nova rate of approximately 36 novae per year, under-predicting the most recent observational estimate of $65^{+15}_{-16}$. Finally, we conclude that when making predictions about currently observable nova rates in spiral galaxies, or stellar environments where star formation has ceased in the distant past, metallicity can likely be considered of secondary importance compared to uncertainties in binary stellar evolution.
O'RTA MAXSUS PROFESSIONAL TA'LIM MUASSASALARIDA O'QUV FAOLIYATNI TASHKIL ETISHDA ZAMONAVIY TEXNOLOGIYALARDAN FOYDALANISHNING SAMARADORLIGI
Creators: name: No'monova, Farzona
Publisher: name: Zenodo
Year: 2025

description: Mazkur tezis lingvopoetikaning o‘ziga xos xususiyatlarini tadqiq etadi va badiiy matnlardagi til vositalarining estetik funksiyasini yoritishga qaratilgan. Lingvopoetika so‘zlarning nafaqat mazmuniy, balki ifodaviy imkoniyatlarini ham o‘rganadi. Ushbu jarayon Omon Matjon ijodida yorqin aks etgan. Shoirning asarlari inson qalbining nozik kechinmalari, tabiat manzaralari va milliy qadriyatlarni badiiy mahorat bilan ifodalashi bilan ajralib turadi.
Astrometry of Galactic Star Forming Region Sharpless 269 with VERA : Parallax Measurements and Constraint on Outer Rotation Curve
Creators: name: Honma, Mareki
name: Bushimata, Takeshi
name: Choi, Yoon Kyung
name: Hirota, Tomoya
name: Imai, Hiroshi
name: Iwadate, Kenzaburo
name: Jike, Takaaki
name: Kameya, Osamu
name: Kamohara, Ryuichi
name: Kan-ya, Yukitoshi
name: Kawaguchi, Noriyuki
name: Kijima, Masachika
name: Kobayashi, Hideyuki
name: Kuji, Seisuke
name: Kurayama, Tomoharu
name: Manabe, Seiji
name: Miyaji, Takeshi
name: Nagayama, Takumi
name: Nakagawa, Akiharu
name: Oh, Chung Sik
name: Omodaka, Toshihiro
name: Oyama, Tomoaki
name: Sakai, Satoshi
name: Sato, Katsuhisa
name: Sasao, Tetsuo
name: Shibata, Katsunori M.
name: Shintani, Motonobu
name: Suda, Hiroshi
name: Tamura, Yoshiaki
name: Tsushima, Miyuki
name: Yamashita, Kazuyoshi
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have performed high-precision astrometry of H2O maser sources in Galactic star forming region Sharpless 269 (S269) with VERA. We have successfully detected a trigonometric parallax of 189+/-8 micro-arcsec, corresponding to the source distance of 5.28 +0.24/-0.22 kpc. This is the smallest parallax ever measured, and the first one detected beyond 5 kpc. The source distance as well as proper motions are used to constrain the outer rotation curve of the Galaxy, demonstrating that the difference of rotation velocities at the Sun and at S269 (which is 13.1 kpc away from the Galaxy's center) is less than 3%. This gives the strongest constraint on the flatness of the outer rotation curve and provides a direct confirmation on the existence of large amount of dark matter in the Galaxy's outer disk.
description: 7 pages and 4 figures, Accepted by PASJ (Vol. 59, No. 5, October 25, 2007 issue)
1D Stochastic Inversion of Airborne Time-domain Electromag-netic Data with Realistic Prior and Accounting for the Forward Modeling Error
Creators: name: Bai, Peng
name: Vignoli, Giulio
name: Hansen, Thomas Mejer
Publisher: name: arXiv
Year: 2021
Subjects: subject: Geophysics (physics.geo-ph)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: Applications (stat.AP)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Airborne electromagnetic surveys may consist of hundreds of thousands of soundings. In most cases, this makes 3D inversions unfeasible even when the subsurface is characterized by a high level of heterogeneity. Instead, approaches based on 1D forwards are routinely used because of their computational efficiency. However, it is relatively easy to fit 3D responses with 1D forward modelling and retrieve apparently well-resolved conductivity models. However, those detailed features may simply be caused by fitting the modelling error connected to the approximate forward. In addition, it is, in practice, difficult to identify this kind of artifacts as the modeling error is correlated. The present study demonstrates how to assess the modelling error introduced by the 1D approximation and how to include this additional piece of information into a probabilistic inversion. Not surprisingly, it turns out that this simple modification provides not only much better reconstructions of the targets but, maybe, more importantly, guarantees a correct estimation of the corresponding reliability.
Additional file 1: of Protocol for the cost-consequence and equity impact analyses of a cluster randomised controlled trial comparing three variants of a nutrition-sensitive agricultural extension intervention to improve maternal and child dietary diversity and nutritional status in rural Odisha, India (UPAVAN trial)
Creators: name: Haghparast-Bidgoli, Hassan
name: Skordis, Jolene
name: Harris-Fry, Helen
name: Krishnan, Sneha
name: OâHearn, Meghan
name: Abhinav Kumar
name: Ronali Pradhan
name: Naba Mishra
name: Upadhyay, Avinash
name: Shibananth Pradhan
name: Ojha, Amit
name: Cunningham, Sarah
name: Shibanand Rath
name: Palmer, Tom
name: Koniz-Booher, Peggy
name: Suneetha Kadiyala
Publisher: name: Figshare
Year: 2019
Subjects: subject: Medicine
subject: Biotechnology
subject: Sociology
subject: FOS: Sociology
subject: Science Policy

description: Standard Protocol Items: Recommendations for Interventional Trials (SPIRIT) 2013 Checklist: recommended items to address in a clinical trial protocol and related documents*. (DOC 122 kb)
Weak three-dimensional coupling of Heisenberg quantum spin chains in SrCuTe$_{2}$O$_{6}$
Creators: name: Chillal, S.
name: Islam, A. T. M. N.
name: Steffens, P.
name: Bewley, R.
name: Lake, B.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The magnetic Hamiltonian of the Heisenberg quantum antiferromagnet SrCuTe$_{2}$O$_{6}$ is studied by inelastic neutron scattering technique on powder and single crystalline samples above and below the magnetic transition temperatures at 8 K and 2 K. The high temperature spectra reveal a characteristic diffuse scattering corresponding to a multi-spinon continuum confirming the dominant quantum spin-chain behavior due to the third neighbour interaction J$_{intra}$ = 4.22 meV (49 K). The low temperature spectra exhibits sharper excitations at energies below 1.25 meV which can be explained by considering a combination of weak antiferromagnetic first nearest neighbour interchain coupling J$_1$ = 0.17 meV (1.9 K) and even weaker ferromagnetic second nearest neighbour J$_2$ = -0.037 meV (-0.4 K) or a weak ferromagnetic J$_2$ = -0.11 meV (-1.3 K) and antiferromagnetic J$_6$ = 0.16 meV (1.85 K) giving rise to the long-range magnetic order and spin-wave excitations at low energies. These results suggest that SrCuTe$_{2}$O$_{6}$ is a highly one-dimensional Heisenberg system with three mutually perpendicular spin-chains coupled by a weak ferromagnetic J$_2$ in addition to the antiferromagnetic J$_1$ or J$_6$ presenting a contrasting scenario from the highly frustrated hyper-hyperkagome lattice (equally strong antiferromagnetic J$_1$ and J$_2$) found in the iso-structural PbCuTe$_{2}$O$_{6}$.
description: 9 pages, 5+2 figures
Improved Measurements of the Sun's Meridional Flow and Torsional Oscillation from Correlation tracking on MDI \& HMI magnetograms
Creators: name: Mahajan, Sushant S.
name: Hathaway, David H.
name: Muñoz-Jaramillo, Andrés
name: Martens, Petrus C.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: The Sun's axisymmetric flows, differential rotation and meridional flow, govern the dynamics of the solar magnetic cycle and variety of methods are used to measure these flows, each with its own strengths and weaknesses. Flow measurements based on cross-correlating images of the surface magnetic field have been made since the 1970s which require advanced numerical techniques that are capable of detecting movements of less than the pixel size in images of the Sun. We have identified several systematic errors in addition to the center-to-limb effect that influence previous measurements of these flows and propose numerical techniques that can minimize these errors by utilizing measurements of displacements at several time-lags. Our analysis of line-of-sight magnetograms from the {\em Michelson Doppler Imager} (MDI) on the ESA/NASA {\em Solar and Heliospheric Observatory} (SOHO) and {\em Helioseismic and Magnetic Imager} (HMI) on the NASA {\em Solar Dynamics Observatory} (SDO) shows long-term variations in the meridional flow and differential rotation over two sunspot cycles from 1996 to 2020. These improved measurements can serve as vital inputs for solar dynamo and surface flux transport simulations.
description: 16 pages, 9 figures, 2 tables
Effect of Density Inhomogeneity on YORP: The case of Itokawa
Creators: name: Scheeres, D. J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The effect of density inhomogeneity on the YORP effect for a given shape model is investigated. A density inhomogeneity will cause an offset between the center of figure and the center of mass and a re-orientation of the principal axes away from those associated with the shape alone. Both of these effects can alter the predicted YORP rate of change in angular velocity and obliquity. We apply these corrections to the Itokawa shape model and find that its YORP angular velocity rate is sensitive to offsets between its center of mass and center of figure, with a shift on the order of 10 meters being able to change the sign of the YORP effect for that asteroid. Given the non-detection of YORP for Itokawa as of 2008, this can shed light on the density distribution within that body. The theory supports a shift of the asteroid center of mass towards Itokawa's neck region, where there is an accumulation of finer gravels. Detection of the YORP effect for Itokawa should provide some strong constraints on its density distribution. This theory could also be applied to asteroids visited by future spacecraft to constrain density inhomogeneities.
description: 23 pages, 3 figures
Readiness for the Transferring of Educational Mission of the Local Administration, Samutsakorn Province
Creators: name: Pensri Chirinang
Publisher: name: King Mongkut's Univesity of Technology Thonburi
Year: 2013
Subjects: Local administration , Readiness , Transferring of of educational missiont

description: 1, 36, วารสารวิจัยและพัฒนา มจธ.
A Design of H Controller for Minimizing Position Error Signal in HGA Tester
Creators: name: Tanachai Jatturongkapolkul
name: Benjamas Panomruttanarug
Publisher: name: King Mongkut's Univesity of Technology Thonburi
Year: 2013
Subjects: Head Gimbal Assembly, HGA Tester, Position Error Signal, Servo System

description: 1, 36, วารสารวิจัยและพัฒนา มจธ.
Turbulence, representations, and trace-preserving actions
Creators: name: Kerr, David
name: Li, Hanfeng
name: Pichot, Mikael
Publisher: name: arXiv
Year: 2008
Subjects: subject: Operator Algebras (math.OA)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: We establish criteria for turbulence in certain spaces of C*-algebra representations and apply this to the problem of nonclassifiability by countable structures for group actions on a standard atomless probability space (X,μ) and on the hyperfinite II_1 factor R. We also prove that the conjugacy action on the space of free actions of a countably infinite amenable group on R is turbulent, and that the conjugacy action on the space of ergodic measure-preserving flows on (X,μ) is generically turbulent.
description: 27 pages
Morphological Transformation and Star Formation Quenching of Massive Galaxies at 0.5 < z < 2.5 in 3D-HST/CANDELS
Creators: name: Liu, Shuang
name: Gu, Yizhou
name: Yuan, Qirong
name: Lu, Shiying
name: Bao, Min
name: Fang, Guanwen
name: Fan, Lulu
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: To figure out the effect of stellar mass and local environment on morphological transformation and star formation quenching in galaxies, we use the massive ($M_* \geq 10^{10} M_{\odot}$) galaxies at $0.5 \leq z \leq 2.5$ in five fields of 3D-HST/CANDELS. Based on the {\it UVJ} diagnosis and the possibility of possessing spheroid, our sample of massive galaxies are classified into four populations: quiescent early-type galaxies (qEs), quiescent late-type galaxies (qLs), star-forming early-type galaxies (sEs), and star-forming late-type galaxies (sLs). It is found that the quiescent fraction is significantly elevated at the high ends of mass and local environmental overdensity, which suggests a clear dependence of quenching on both mass and local environment. Over cosmic time, the mass dependence of galaxy quiescence decreases while the local environment dependence increases. The early-type fraction is found to be larger only at high-mass end, indicating a evident mass dependence of morphological transformation. This mass dependence becomes more significant at lower redshifts. Among the four populations, the fraction of active galactic nucleus (AGN) in the qLs peaks at $2
description: 18 pages, 14 figures, accepted by ApJ
Free Actions of Finite Groups on $S^n \times S^n$
Creators: name: Hambleton, Ian
name: Unlu, Ozgun
Publisher: name: arXiv
Year: 2007
Subjects: subject: Algebraic Topology (math.AT)
subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 57S17, 57R67

description: Let $p$ be an odd prime. We construct a non-abelian extension $Γ$ of $S^1$ by $Z/p \times Z/p$, and prove that any finite subgroup of $Γ$ acts freely and smoothly on $S^{2p-1} \times S^{2p-1}$. In particular, for each odd prime $p$ we obtain free smooth actions of infinitely many non-metacyclic rank two $p$-groups on $S^{2p-1} \times S^{2p-1}$. These results arise from a general approach to the existence problem for finite group actions on products of equidimensional spheres.
description: Our preprint "Free actions of extraspecial p-groups on S^n x S^n" (arXiv:math/0701558) is now divided into two separate papers. This is the final version of the second part - to appear in Transactions AMS
The structure of cabinet government in Canada, 1968-72 : an assessment
Creators: name: Zitko, Carley F.
Publisher: name: University of British Columbia
Year: 2010

description: During the 1968-1972 period attempts were made to introduce 'rationality' into the structures and processes of the Canadian Cabinet. It has usually been argued that these attempts by Prime Minister Trudeau provide an innovative and radically distinct departure from the 'diversified incrementalism' or 'crises management' decision-making under Prime Minister Pearson. Is the usual argument correct? This question is dealt with by examining in turn the role of the Cabinet and the Prime Minister, the development of the committee system (with emphasis upon the Committee on Priorities and Planning), the place of the Treausury Board and especially of the Treasury Board Secretariat, the role of the Cabinet Secretariat, and the role of the Prime Minister's Office. The crucial difference between official actions and political actions is underscored in this examination. While the 1968-72 changes did establish , a more rational basis for decision-making, and may thus be seen as innovative, the changes did not amount to any radical departure — and, indeed, they were themselves the product of an incremental approach to change. While Prime Minister Trudeau presented the changes in terms of a philosophy of rationality, the actual changes must be seen as incremental extensions of changes which Prime Minister Pearson began.
Multiwavelength study of Cygnus A I. Precession and slow jet speeds from radio observations
Creators: name: Steenbrugge, K. C.
name: Blundell, K. M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We study the jet and counterjet of the powerful classical double FRII radio galaxy Cygnus A as seen in the 5, 8 and 15-GHz radio bands using the highest spatial resolution and signal-to-noise archival data available. We demonstrate that the trace of the radio knots that delineate the jet and counterjet deviates from a straight line and that the inner parts can be satisfactorily fitted with the precession model of Hjellming & Johnston. The parameter values of the precession model fits are all plausible although the jet speed is rather low (< 0.5 c) but, on investigation, found to be consistent with a number of other independent estimates of the jet speed in Cygnus A. We compare the masses and precession periods for sources with known precession and find that for the small number of AGN with precessing jets the precession periods are significantly longer than those for microquasars.
description: Accepted for publication by MNRAS, 8 pages; e-mail author for full resolution
Introduction slides to LIKE Poster session at IEA Wind Task 32 General Meeting 2021
Creators: name: Pathan, Shahbaz
name: Liqin Jin
name: Costa, Francisco
name: Rubio, Hugo
name: Isadora Coimbra
name: Haichen Zuo
name: Diezel, Jan Markus
name: Orozco, Priscila
name: Anantharaman, Arjun
name: Sebastiani, Alessandro
name: Guo, Feng
name: Fu, Wei
name: Nafisifard, Mohammad
name: Zhaoyu Zhang
name: Wang, Sai
Publisher: name: Zenodo
Year: 2021

description: Introduction slides for the poster session for the General Meeting of IEA Wind Task 32 on November 16th 2021. Each Early Stage Researcher (ESR) from LIKE presented their work on one slide at the beginning of the session.
Privacy-preserving Spatiotemporal Scenario Generation of Renewable Energies: A Federated Deep Generative Learning Approach
Creators: name: Li, Yang
name: Li, Jiazheng
name: Wang, Yi
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Systems and Control (eess.SY)
subject: Signal Processing (eess.SP)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Scenario generation is a fundamental and crucial tool for decision-making in power systems with high-penetration renewables. Based on big historical data, a novel federated deep generative learning framework, called Fed-LSGAN, is proposed by integrating federated learning and least square generative adversarial networks (LSGANs) for renewable scenario generation. Specifically, federated learning learns a shared global model in a central server from renewable sites at network edges, which enables the Fed-LSGAN to generate scenarios in a privacy-preserving manner without sacrificing the generation quality by transferring model parameters, rather than all data. Meanwhile, the LSGANs-based deep generative model generates scenarios that conform to the distribution of historical data through fully capturing the spatial-temporal characteristics of renewable powers, which leverages the least squares loss function to improve the training stability and generation quality. The simulation results demonstrate that the proposal manages to generate high-quality renewable scenarios and outperforms the state-of-the-art centralized methods. Besides, an experiment with different federated learning settings is designed and conducted to verify the robustness of our method.
description: Accepted by IEEE Transactions on Industrial Informatics
Coreless Terrestrial Exoplanets
Creators: name: Elkins-Tanton, L.
name: Seager, S.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Differentiation in terrestrial planets is expected to include the formation of a metallic iron core. We predict the existence of terrestrial planets that have differentiated but have no metallic core--planets that are effectively a giant silicate mantle. We discuss two paths to forming a coreless terrestrial planet, whereby the oxidation state during planetary accretion and solidification will determine the size or existence of any metallic core. Under this hypothesis, any metallic iron in the bulk accreting material is oxidized by water, binding the iron in the form of iron oxide into the silicate minerals of the planetary mantle. The existence of such silicate planets has consequences for interpreting the compositions and interior density structures of exoplanets based on their mass and radius measurements.
description: ApJ, in press. 22 pages, 5 figures
Supersymmetric lattice models in one and two dimensions
Creators: name: Kaestner, Tobias
name: Bergner, Georg
name: Uhlmann, Sebastian
name: Wipf, Andreas
name: Wozar, Christian
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We study and simulate N=2 supersymmetric Wess-Zumino models in one and two dimensions. For any choice of the lattice derivative, the theories can be made manifestly supersymmetric by adding appropriate improvement terms corresponding to discretizations of surface integrals. In particular, we check that fermionic and bosonic masses coincide and the unbroken Ward identities are fulfilled to high accuracy. Equally good results for the effective masses can be obtained in a model with the SLAC derivative (even without improvement terms). In two dimensions we introduce a non-standard Wilson term in such a way that the discretization errors of the kinetic terms are only of order a squared. Masses extracted from the corresponding manifestly supersymmetric model prove to approach their continuum values much quicker than those from a model containing the standard Wilson term. Again, a comparable enhancement can be achieved in a theory using the SLAC derivative.
description: 7 pages, 3 figures, poster presented at XXV International Symposium on Lattice Field Theory, July 30 - August 4 2007, Regensburg, Germany
First Demonstration of the Korean eLoran Accuracy in a Narrow Waterway Using Improved ASF Maps
Creators: name: Kim, Woohyun
name: Son, Pyo-Woong
name: Park, Sul Gee
name: Park, Sang Hyun
name: Seo, Jiwon
Publisher: name: arXiv
Year: 2021
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: The vulnerabilities of global navigation satellite systems (GNSSs) to radio frequency jamming and spoofing have attracted significant research attention. In particular, the large-scale jamming incidents that occurred in South Korea substantiate the practical importance of implementing a complementary navigation system. This letter briefly summarizes the efforts of South Korea to deploy an enhanced long-range navigation (eLoran) system, which is a terrestrial low-frequency radio navigation system that can complement GNSSs. After four years of research and development, the Korean eLoran testbed system has been recently deployed and is operational since June 1, 2021. Although its initial performance at sea is satisfactory, navigation through a narrow waterway is still challenging because a complete survey of the additional secondary factor (ASF), which is the largest source of error for eLoran, is practically difficult in a narrow waterway. This letter proposes an alternative way to survey the ASF in a narrow waterway and improve the ASF map generation methods. Moreover, the performance of the proposed approach was validated experimentally.
description: Submitted to IEEE Transactions on Aerospace and Electronic Systems
A volume inequality for quantum Fisher information and the uncertainty principle
Creators: name: Gibilisco, P.
name: Imparato, D.
name: Isola, T.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mathematical Physics (math-ph)
subject: Statistics Theory (math.ST)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Let $A_1,...,A_N$ be complex self-adjoint matrices and let $ρ$ be a density matrix. The Robertson uncertainty principle $$ det(Cov_ρ(A_h,A_j)) \geq det(- \frac{i}{2} Tr(ρ[A_h,A_j])) $$ gives a bound for the quantum generalized covariance in terms of the commutators $[A_h,A_j]$. The right side matrix is antisymmetric and therefore the bound is trivial (equal to zero) in the odd case $N=2m+1$. Let $f$ be an arbitrary normalized symmetric operator monotone function and let $_{ρ,f}$ be the associated quantum Fisher information. In this paper we conjecture the inequality $$ det (Cov_ρ(A_h,A_j)) \geq det (\frac{f(0)}{2} < i[ρ, A_h],i[ρ,A_j] >_{ρ,f}) $$ that gives a non-trivial bound for any natural number $N$ using the commutators $i[ρ, A_h]$. The inequality has been proved in the cases $N=1,2$ by the joint efforts of many authors. In this paper we prove the case N=3 for real matrices.
Ranges of Atmospheric Mass and Composition of Super Earth Exoplanets
Creators: name: Elkins-Tanton, L.
name: Seager, S.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Terrestrial-like exoplanets may obtain atmospheres from three primary sources: Capture of nebular gases, degassing during accretion, and degassing from subsequent tectonic activity. Here we model degassing during accretion to estimate the range of atmospheric mass and composition on exoplanets ranging from 1 to 30 Earth masses. We use bulk compositions drawn from primitive and differentiated meteorite compositions. Degassing alone can create a wide range of masses of planetary atmospheres, ranging from less than a percent of the planet's total mass up to ~6 mass% of hydrogen, ~20 mass% of water, and/or ~5 mass% of carbon compounds. Hydrogen-rich atmospheres can be outgassed as a result of oxidizing metallic iron with water, and excess water and carbon can produce atmospheres through simple degassing. As a byproduct of our atmospheric outgassing models we find that modest initial water contents (10 mass% of the planet and above) create planets with deep surface liquid water oceans soon after accretion is complete.
description: ApJ, in press. 32 pages, 6 figures
TriBERT: Full-body Human-centric Audio-visual Representation Learning for Visual Sound Separation
Creators: name: Rahman, Tanzila
name: Yang, Mengyu
name: Sigal, Leonid
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: The recent success of transformer models in language, such as BERT, has motivated the use of such architectures for multi-modal feature learning and tasks. However, most multi-modal variants (e.g., ViLBERT) have limited themselves to visual-linguistic data. Relatively few have explored its use in audio-visual modalities, and none, to our knowledge, illustrate them in the context of granular audio-visual detection or segmentation tasks such as sound source separation and localization. In this work, we introduce TriBERT -- a transformer-based architecture, inspired by ViLBERT, which enables contextual feature learning across three modalities: vision, pose, and audio, with the use of flexible co-attention. The use of pose keypoints is inspired by recent works that illustrate that such representations can significantly boost performance in many audio-visual scenarios where often one or more persons are responsible for the sound explicitly (e.g., talking) or implicitly (e.g., sound produced as a function of human manipulating an object). From a technical perspective, as part of the TriBERT architecture, we introduce a learned visual tokenization scheme based on spatial attention and leverage weak-supervision to allow granular cross-modal interactions for visual and pose modalities. Further, we supplement learning with sound-source separation loss formulated across all three streams. We pre-train our model on the large MUSIC21 dataset and demonstrate improved performance in audio-visual sound source separation on that dataset as well as other datasets through fine-tuning. In addition, we show that the learned TriBERT representations are generic and significantly improve performance on other audio-visual tasks such as cross-modal audio-visual-pose retrieval by as much as 66.7% in top-1 accuracy.
description: 10 pages, 5 Figures, Neurips 2021
Special collections in the university library: an examination of special collections at Nottingham University Library and Warwick University Library
Creators: name: Briggs, Timothy
Publisher: name: Loughborough University
Year: 2021
Subjects: subject: 89999 Information and Computing Sciences not elsewhere classified
subject: FOS: Computer and information sciences

description: Special collections in the university library: an examination of special collections at Nottingham University Library and Warwick University Library
INSON SALOMATLIGIDA JISMONIY TARBIYA VA SPORTNING O'RNINI KOMPLEKS TAHLIL QILISH
Creators: name: Abduraimov, Shaxboz
name: Allayorov, Azizbek
Publisher: name: Zenodo
Year: 2023

description: Ushbu maqolada barkamol avlodni voyaga etkazish, shu asosda ijtimoiy munosabatlarni sog‘lom turmush tarzining ma’naviy-ahloqiy ta’sirini ilmiy asoslash. Sog‘lom turmush tarzini qaror toptirish va uning asosiy-madaniy darajasini yanada oshirish yo‘llarini hamda aholini keng qatlamini jismoniy tarbiya va sportga jalb qilishni ilmiy yoritish.
Reply to ''Comment on 'Regularizing Capacity of Metabolic Networks' ''
Creators: name: Marr, Carsten
name: Mueller-Linow, Mark
name: Huett, Marc-Thorsten
Publisher: name: arXiv
Year: 2007
Subjects: subject: Molecular Networks (q-bio.MN)
subject: Cellular Automata and Lattice Gases (nlin.CG)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: In a recent paper [C. Marr, M. Mueller-Linow, and M.-T. Huett, Phys. Rev. E 75, 041917 (2007)] we discuss the pronounced potential of real metabolic network topologies, compared to randomized counterparts, to regularize complex binary dynamics. In their comment [P. Holme and M. Huss, arXiv:0705.4084v1], Holme and Huss criticize our approach and repeat our study with more realistic dynamics, where stylized reaction kinetics are implemented on sets of pairwise reactions. The authors find no dynamic difference between the reaction sets recreated from the metabolic networks and randomized counterparts. We reproduce the author's observation and find that their algorithm leads to a dynamical fragmentation and thus eliminates the topological information contained in the graphs. Hence, their approach cannot rule out a connection between the topology of metabolic networks and the ubiquity of steady states.
description: 2 pages, 2 figures
Metacrininae Klikushin 1977
Creators: name: Roux, Nadia Améziane Marc Eléaume Michel
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Echinodermata
Crinoidea
Isocrinida
Isselicrinidae

description: Subfamily Metacrininae Klikushin, 1977 sensu Roux, 1981
More than two primibrachials, cryptosynarthry at IBr1 + 2, except Eometacrinus, always muscular synarthry at IIBr1 + 2. Included genera: Eometacrinus, Metacrinus, and Saracrinus. Paleocene–Recent, possibly since Late Cretaceous.
description: Published as part of Roux, Nadia Améziane Marc Eléaume Michel, 2024, Classification of Isocrinida (Echinodermata: Crinoidea) with the description of a new extant genus and species from the western Pacific, pp. 994-1012 in Zoological Journal of the Linnean Society (Zool. J. Linn. Soc.) (Zool. J. Linn. Soc.) 200 (4) on page 1009, DOI: 10.1093/zoolinnean/zlad101, http://zenodo.org/record/11240631
Intra-unitcell cluster-cluster magnetic compensation and large exchange bias in cubic alloys
Creators: name: Giri, Bimalesh
name: Sahni, Bhawna
name: Mejía, C. Salazar
name: Chattopadhyay, S.
name: Zeitler, Uli
name: Alam, Aftab
name: Nayak, Ajaya K.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Composite quantum materials are the ideal examples of multifunctional systems which simultaneously host more than one novel quantum phenomenon in physics. Here, we present a combined theoretical and experimental study to demonstrate the presence of an extremely large exchange bias in the range 0.8 T - 2.7 T and a fully compensated magnetic state (FCF) in a special type of Pt and Ni doped Mn$_3$In cubic alloy. Here, oppositely aligned uncompensated moments in two different atomic clusters sum up to zero which are responsible for the FCF state. Our Density functional theory (DFT) calculations show the existence of several possible ferrimagnetic configurations with the FCF as the energetically most stable one. The microscopic origin of the large exchange bias can be interpreted in terms of the exchange interaction between the FCF background and the uncompensated ferrimagnetic clusters stabilized due to its negligible energy difference with respect to the FCF phase. We utilize pulsed magnetic field up to 60 T and 30 T static field magnetization measurements to confirm the intrinsic nature of exchange bias in our system. Finally, our Hall effect measurements demonstrate the importance of uncompensated noncoplanar interfacial moments for the realization of large EB. The present finding of gigantic exchange bias in a unique compensated ferrimagnetic system opens up a direction for the design of novel quantum phenomena for the technological applications.
description: 13 pages, 18 figures
Persistence of the 0.7 anomaly of quantum point contacts in high magnetic fields
Creators: name: Koop, E. J.
name: Lerescu, A. I.
name: Liu, J.
name: van Wees, B. J.
name: Reuter, D.
name: Wieck, A. D.
name: van der Wal, C. H.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The spin degeneracy of the lowest subband that carries one-dimensional electron transport in quantum point contacts appears to be spontaneously lifted in zero magnetic field due to a phenomenon that is known as the 0.7 anomaly. We measured this energy splitting, and studied how it evolves into a splitting that is the sum of the Zeeman effect and a field-independent exchange contribution when applying a magnetic field. While this exchange contribution shows sample-to-sample fluctuations, it is for all QPCs correlated with the zero-field splitting of the 0.7 anomaly. This provides evidence that the splitting of the 0.7 anomaly is dominated by this field-independent exchange splitting.
description: 5 pages, 4 figures
Application of Contractor Renormalization Group (CORE) to the Heisenberg zig-zag and the Hubbard chain
Creators: name: Cichy, Krzysztof
name: Tomczak, Piotr
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The COntractor REnormalization group method was devised in 1994 by Morningstar and Weinstein. It was primarily aimed at extracting the physics of lattice quantum field theories (like lattice Quantum Chromodynamics). However, it is a general method of analyzing Hamiltonian lattice systems, e.g. Ising, Heisenberg or Hubbard models. The aim of this work is to show the application of CORE to one-dimensional quantum systems -- the Heisenberg zig-zag model and the Hubbard chain. As a test of the method, the ground state energy of these systems will be calculated.
description: 10 pages, 3 figures
Diplocrininae Roux 1981
Creators: name: Roux, Nadia Améziane Marc Eléaume Michel
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Echinodermata
Crinoidea
Isocrinida
Isselicrinidae

description: Subfamily Diplocrininae Roux, 1981
Stalk symplexies of diplocrinine type, proximal cirri oriented upwards, occasionally alternicirration; usually cryptosynarthry at Br1 + 2, secundibrachitaxes usually with <5 brachials often two. Included genera: Nielsenicrinus, Doreckicrinus, Teliocrinus, and Endoxocrinus. Early Cretaceous?–Recent.
description: Published as part of Roux, Nadia Améziane Marc Eléaume Michel, 2024, Classification of Isocrinida (Echinodermata: Crinoidea) with the description of a new extant genus and species from the western Pacific, pp. 994-1012 in Zoological Journal of the Linnean Society (Zool. J. Linn. Soc.) (Zool. J. Linn. Soc.) 200 (4) on page 1010, DOI: 10.1093/zoolinnean/zlad101, http://zenodo.org/record/11240631
Attitudes Towards Women's Political Participation in Solomon Islands
Creators: name: Wiltshire, Colin
name: Batley, James
name: Ridolfi, Joanne
name: Rogers, Athena
Publisher: name: Canberra, ACT: Dept. of Pacific Affairs, Research School of Pacific and Asian Studies, The Australian National University
Year: 2019

description: The ANU’s Department of Pacific Affairs ran a large-scale election observation exercise in Solomon Islands prior to, during and following national elections held on 3 April 2019. Observations were conducted in 15 of Solomon Islands’ 50 constituencies by 90 observers, of which 77 were Solomon Islanders. The research comprised direct election observations and almost 5000 citizen surveys. This In Brief is part of a series highlighting key findings that draws on data canvassed in our final election observation report (forthcoming).
Politicising Drought Relief in Papua New Guinea
Creators: name: Wiltshire, Colin
name: Oppermann, Thiago Cintra
Publisher: name: Canberra, ACT : Coral Bell School of Asia Pacific Affairs, College of Asia and the Pacific, The Australian National University
Year: 2015

description: Natural disasters invariably involve complex social, political and economic systems that can make a bad situation worse. The 2015 El Niño drought in Papua New Guinea (PNG) has few precedents. Poor strategy in response could have serious implications. Rather than a centrally coordinated national disaster response, the PNG government has decided to provide drought relief through the controversial District Services Improvement Program (DSIP), coordinated by the recently introduced District Development Authorities (DDAs). Drawing on recent fieldwork in three drought-affected districts, this In Brief considers the risks of relying on politically controlled development funds to provide drought relief to communities that need it most.
On Random Unitary Channels
Creators: name: Audenaert, Koenraad M. R.
name: Scheel, Stefan
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In this article we provide necessary and sufficient conditions for a completely positive trace-preserving (CPT) map to be decomposable into a convex combination of unitary maps. Additionally, we set out to define a proper distance measure between a given CPT map and the set of random unitary maps, and methods for calculating it. In this way one could determine whether non-classical error mechanisms such as spontaneous decay or photon loss dominate over classical uncertainties, for example in a phase parameter. The present paper is a step towards achieving this goal.
description: 11 pages, typeset using RevTeX4
Dynamics in interacting scalar-torsion theory
Creators: name: Paliathanasis, Andronikos
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: In a spatially flat \ Friedmann--Lema\^ıtre--Robertson--Walker background space we consider a scalar-torsion gravitational model which has similar properties with the dilaton theory. This teleparallel model is invariant under a discrete transformation similar to the Gasperini-Veneziano duality transformation. Moreover, in the gravitational Action integral we introduce the Lagrangian function of a pressureless fluid source which is coupled to the teleparallel dilaton field. This specific gravitational theory with interaction in the dark sector of the universe is investigated by using methods of the dynamical system analysis. We calculate that the theory provides various areas of special interest for the evolution of the cosmological history. Inflationary scaling solutions and the de Sitter universe is recovered. Furthermore, we calculate that there exist an attractor which provides a stable solution where the two fluid components, the scalar field and the pressureless matter, contribute in the cosmological fluid. This solution is of special interest because it can describe the present epoch. Finally, the qualitative evolution of the cosmographic parameters is discussed.
description: 19 pages, 4 figures, to appear in Universe, Special Issue: "Probing the Dark Universe with Theory and Observations"
Colloid-colloid and colloid-wall interactions in driven suspensions
Creators: name: Krüger, Matthias
name: Rauscher, Markus
Publisher: name: arXiv
Year: 2007
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We investigate the non-equilibrium fluid structure mediated forces between two colloids driven through a suspension of mutually non-interacting Brownian particles as well as between a colloid and a wall in stationary situations. We solve the Smoluchowski equation in bispherical coordinates as well as with a method of reflections, both in linear approximation for small velocities and numerically for intermediate velocities, and we compare the results to a superposition approximation considered previously. In particular we find an enhancement of the friction (compared to the friction on an isolated particle) for two colloids driven side by side as well as for a colloid traveling along a wall. The friction on tailgating colloids is reduced. Colloids traveling side by side experience a solute induced repulsion while tailgating colloids are attracted to each other.
description: 8 Pages, 8 figures