cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The confining color field in SU(3) gauge theory
Creators: name: Baker, M.
name: Cea, P.
name: Chelnokov, V.
name: Cosmai, L.
name: Cuteri, F.
name: Papa, A.
Publisher: name: arXiv
Year: 2019
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We extend a previous numerical study of SU(3) Yang-Mills theory in which we measured the spatial distribution of all components of the color fields surrounding a static quark-antiquark pair for a wide range of quark-antiquark separations, and provided evidence that the simulated gauge invariant chromoelectric field can be separated into a Coulomb-like 'perturbative' field and a 'non-perturbative' field, identified as the confining part of the SU(3) flux tube field. In this paper we hypothesize that the fluctuating color fields not measured in our simulations do not contribute to the string tension. Under this assumption the string tension is determined by the color fields we measure, which form a tensor $F_{μν}$ pointing in a single direction in color space. We call this the Maxwell mechanism of confinement. We provide an additional procedure to isolate the non-perturbative (confining) field. We then extract the string tension from a stress energy-momentum tensor $T_{μν}$ having the Maxwell form, constructed from the non-perturbative part of the tensor $F_{μν}$ obtained from our simulations. To test our hypothesis we calculate the string tension from our simulations of the color fields for ten values of the quark-antiquark separation ranging from 0.37 fm to 1.2 fm. We also calculate the spatial distributions of the energy-momentum tensor $T_{μν}$ surrounding static quarks for this range of separations, and we compare these distributions with those obtained from direct simulations of the energy-momentum tensor in SU(3) Yang-Mills theory.
description: 16 pages, 12 figures. arXiv admin note: text overlap with arXiv:1810.07133
Shapefiles.zip
Creators: name: Taiwo, Israel
Publisher: name: figshare
Year: 2020
Subjects: subject: 50206 Environmental Monitoring
subject: FOS: Earth and related environmental sciences

description: This Shapefile.zip folder contains four folders. The folders contain shapefiles used in analyzing the "Compliance to standards" of fuels stations in Benin City, Edo State. Another folder in the Shapefile.zip folder as well contains a folder called "Site selection" for new fuel stations in the city. Other folders in the folder include; "Edo" and "Fuel station and road", containing all shapefiles of Edo state, locations of fuel stations and roads.The data were originally acquired from the Open Street Map database.
The Filling station guidelines contains standards to be complied with as produced by the Department of Petroleum Resources (DPR) of Nigeria. The "2006 Population Figures of Benin City" contains population data for Benin City Local Government Areas as published in Nigeria in the year 2006.
Constructing strongly equivalent nonisomorphic models for unsuperstable theories, Part A
Creators: name: Hyttinen, Tapani
name: Shelah, Saharon
Publisher: name: arXiv
Year: 2004
Subjects: subject: Logic (math.LO)
subject: FOS: Mathematics

description: We study how equivalent nonisomorphic models an unsuperstable theory can have. We measure the equivalence by Ehrenfeucht-Fraisse games.
Identifying and documenting the locations of Indian residential schools in Canada
Creators: name: Orlandini, Rosa
Publisher: name: Zenodo
Year: 2018

description: Between 1851 and 1998, over 139 Indian residential schools operated across Canada. The legacy of these schools is the trauma that has left scars in the communities in which the schools resided, as well as for school survivors and their descendants. The precise location of the schools is known for many of them, but this has yet to be determined for the rest. This poster will discuss the methodology, challenges, and outcomes of a project currently underway, in collaboration with the National Centre for Truth and Reconciliation (NCTR), to continue the work of the Truth and Reconciliation Commission and its allies, by finding and documenting the precise locations of these school buildings and properties. The goal is to produce a geospatial dataset and interactive map of residential school locations that shows the location of the primary school buildings; and a bibliography of maps, plans, aerial photographs, and unpublished documents that show the location of school buildings and properties. The data and bibliography will assist the NCTR and their partners in identifying and documenting the location of residential school cemeteries and unmarked graves, as well as assist educators, students, researchers, elders, and survivors in telling their own stories.
In-orbit Vignetting Calibrations of XMM-Newton Telescopes
Creators: name: Lumb, D. H.
name: Finoguenov, A
name: Saxton, R
name: Aschenbach, B
name: Gondoin, P.
name: Kirsch, M
name: Stewart, I. M.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We describe measurements of the mirror vignetting in the XMM-Newton Observatory made in-orbit, using observations of SNR G21.5-09 and SNR 3C58 with the EPIC imaging cameras. The instrument features that complicate these measurements are briefly described. We show the spatial and energy dependences of measured vignetting, outlining assumptions made in deriving the eventual agreement between simulation and measurement. Alternate methods to confirm these are described, including an assessment of source elongation with off-axis angle, the surface brightness distribution of the diffuse X-ray background, and the consistency of Coma cluster emission at different position angles. A synthesis of these measurements leads to a change in the XMM calibration data base, for the optical axis of two of the three telescopes, by in excess of 1 arcminute. This has a small but measureable effect on the assumed spectral responses of the cameras for on-axis targets.
description: Accepted by Experimental Astronomy. 26 pages, 18 figures
Survival of current in a periodically driven hard-core bosonic system
Creators: name: Sharma, Rashmi J.
name: Bandyopadhyay, Jayendra N.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study the survival of the current induced initially by applying a twist at the boundary of a chain of hard-core bosons (HCBs), subject to a periodic double $δ$-function kicks in the staggered on-site potential. We study the current flow and the work-done on the system at the long-time limit as a function of the driving frequency. Like a recent observation in the HCB chain with single $δ$-function kick in the staggered on-site potential, here we also observe many dips in the current flow and concurrently many peaks in the work-done on the system at some specific values of the driving frequency. However, unlike the single kicked case, here we do not observe a complete disappearance of the current in the limit of a high driving frequency, which shows the absence of any dynamical localization in the double $δ$-functions kicked HCB chain. Our analytical estimations of the saturated current and the saturated work-done, defined at the limit of a large time together with a high driving frequency, match very well with the exact numerics. In the case of the very small initial current, induced by a very small twist $ν$, we observe that the saturated current is proportional to $ν$. Finally, we study the time-evolution of the half-filled HCB chain where the particles are localized in the central part of the chain. We observe that the particles spread linearly in a light-cone like region at the rate determined by the maximum value of the group velocity. Except for a very trivial case, the maximum group velocity never vanishes, and therefore we do not observe any dynamical localization in the system.
description: 11 pages, 9 figures
Laser leveling: a private investment analysis
Creators: name: Daubert, John
name: Ayer, Harry
name: Daubert, John
name: Ayer, Harry
Publisher: name: Unknown
Year: 1981
Subjects: Financial Economics
Agricultural and Food Policy

description: Laser leveling farmland is a profitable water savings technology in many areas of the West. Capital cost, irrigation field efficiencies, potential yield increase, energy prices, planning horizon, and the future ft certainty of federal cost-sharing programs significantly affect the decision to laser. If federal programs continue,farmers also need to decide how fast to laser their farms, since payments are a function of time along with acres lasered. Given existing water costs for a typical farm in Arizona and federal subsidies, the farmer should laser part of the farm each year over a ten year period
title: Über die Radikalität des Fragilen
Creators: name: Holland-Cunz, Barbara
Publisher: name: Humboldt-Universität zu Berlin
Year: 2022
Subjects: subject: „Corona-Krise“
subject: Das gute Leben
subject: Diskurs
subject: Fragilität
subject: Globale Seuche
subject: „Klimakrise“
subject: Politik
subject: Wuhan
subject: ddc:300

description: Martha C. Nussbaums 1986 erschienenes Werk The Fragility of Goodness, das sie selbst retrospektiv als „a book about disaster“ bezeichnet, bildet den Ausgangspunkt der Überlegungen, wie in Zeiten einer globalen Seuche über unsere anthropologischen Grundlagen (auch in der feministischen Theorie) neu nachgedacht werden muss. Fragilität strukturiert nicht nur die Verletzlichkeit der Verletzlichen; das Leben aller ist stets durch den Verlust des Guten durch Krankheit, Tod oder schlechte Politik gefährdet. Eine Philosophie des guten Lebens als Vierklang von Vulnerabilität, Sozialität, Fragilität und Materialität ist radikal, da sie dem neuzeitlichen Machbarkeitswahn des Guten – sei es in gegenwärtigen Diskursen oder klassischen Zukunftsvisionen – widerspricht. Wie verwundbar das menschliche Leben ist, illustriert eindrucksvoll das „Wuhan-Tagebuch“ Fang Fangs, das die chinesische Schriftstellerin während des Lockdowns von Januar bis März 2020 (zunächst als Blog) geschrieben hat. Fang Fangs und Nussbaums Arbeiten helfen, den geschichtlichen Einschnitt – „Corona-Krise“ genannt – zu verstehen, der zugleich die letzte Chance für die unumgängliche Transformation der gesellschaftlichen Naturverhältnisse darstellt – genannt „Klimakrise“.
Effects of domestic grain grades on the operational efficiency of Alberta primary elevators
Creators: name: Hoar, W. J.
name: Hawkins, M.
name: Lerohl, M.
name: Hoar, W. J.
name: Hawkins, M.
name: Lerohl, M.
Publisher: name: Unknown
Year: 1981
Subjects: Crop Production/Industries
Agricultural and Food Policy

description: This study analyzed the operational efficiency of the Alberta primary elevator industry for the crop years 1975-79. The study looked at elevator costs and elevator receipts of grain for each year and for a four year period at approximately 150 grain elevators within Alberta. The central focus of this research was to determine the impact of the present number of domestic grain grades, as defined under the Canada Grain Act, on the operational efficiency of primary elevators. In addition, economies of scale and regional effects present in the primary elevator system were examined. The principal hypothesis was that the present number of domestic grades put unnecessary cost pressure and throughput restrictions on the primary elevator system in relation to the market advantages producers and buyers obtain from such a system. The single most important factor in decreasing operational costs was found to be the handling to capacity ratio. As this ratio increased, average costs decreased significantly. The study found that· the current elevator system is efficiently handling the 800 different grades of grain graded within Canada.
Gold (AU)DRIPSS: A decision-making framework for knowledge management
Creators: name: Currier, Brett
name: Butler, Courtney
Publisher: name: Zenodo
Year: 2018

description: The Federal Reserve Bank of Kansas City is developing a digital preservation strategy for its Research Division. As part of this development, we are working from an internally produced framework (Gold (AU)DRIPSS) to guide decision-making. This framework is an extension of the FAIR Data Principles combined with other concerns from the library community and comprises the principles of accessibility, usability, discoverability, reproducibility, interoperability, preservability, scalability, and sustainability. It differs from existing frameworks by taking a more holistic approach, including incorporating more institutional and project management considerations as well as recognizing that an optimal preservation strategy may require subjective assessment and trade-offs. This presentation will review the development of the Gold (AU)DRIPSS Framework and discuss how it has been internally applied to support digital preservation.
Baryon-Baryon Interaction in the Quark Cluster Model
Creators: name: Oka, Makoto
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The quark cluster model approach to the baryon-baryon interaction is reviewed and recent application to the charge symmetry breaking in nuclear force is discussed.
description: Talk presented at KEK Workshop on Few Body Physics, May 24-26, 2002
A pilot study towards cross-searchable social science data archive in Japan
Creators: name: Asaoka, Makoto
name: Maeda, Yutaka
name: Funamori, Miho
name: Hayashi, Masaharu
name: Kazutsuna Yamaji
Publisher: name: Zenodo
Year: 2018

description: Rikkyo University Data Archive (RUDA) is a Japanese data archive established by the Rikkyo University Center for Statistics and Information (CSI) in 2011. Currently, RUDA and National Institute of Informatics (NII) collaborate to establish a cross-searchable data repository integrating different archives in Japan. In this poster, we would like to share the lessons learned from the introduction of RUDA datasets to the NII repository. RUDA is constructed on DSpace, and thus metadata is described under (qualified) Dublin Core. In order to establish cross-searchable infrastructure where compatibility between different metadata schemes is satisfied, appropriate mapping from DC to DDI is required. This poster discusses how RUDA formulates mapping schemes in which semantics are much emphasized. In addition, we would like to discuss to what degree (meta)data sharing is possible. In the above collaborative project, a cloud-type repository system developed by NII is utilized to accommodate and publish metadata offered from data archives. Since such a project where data archives offer their metadata to another institute is less popular, it should be reconsidered to what extent data archives are allowed to offer their metadata while balancing with responsibility and usability.
The demand and allocation structure for U.S. apples
Creators: name: Baumes, Harry S.
name: Turna, Kuldeep S.
name: Baumes, Harry S.
name: Turna, Kuldeep S.
Publisher: name: Unknown
Year: 1981
Subjects: Crop Production/Industries
Agricultural and Food Policy

description: The objectives of this paper are to theorize and estimate an econometric model of the demand and allocation structure of the U.S. apple sector. The apple sector is disaggregated into fresh and processing markets and grower and retail markets are specified. An impact multiplier analysis is included.
“Did you know that this is a gay men’s stroll where they have indiscriminate sex with each other?”
Creators: name: Sun, Jingzhou
Publisher: name: The University of British Columbia
Year: 2023

description: This project proposes a queer intervention at Wreck Beach, centered on the collaborative space-making abilities of queer individuals. By utilizing logs and other natural elements, queer individuals can create a network of intertwined, ambiguous, and resilient spaces that extends beyond what they are limited to today on Wreck Beach. Practically, this living and constantly-morphing network resists conventional ideas of patrolling and policing and renders any colonial attempts to finalize and map the trails futile. Conceptually, this network challenges the dichotomous mindset of current park management practices and amplifies the regenerative and destructive power of natural elements. Ultimately, these interventions aim to create a living queer network of spaces, people, and ecologies that transcends traditional notions of park spaces. The strategies used to create those spaces hopefully would provide a new perspective on space-making for other marginalized communities to resist oppressive systems and create their own alternative spaces.
Bulge Microlensing Optical Depth from EROS 2 observations
Creators: name: Afonso, C.
name: Albert, J. -N.
name: Alard, C.
name: Andersen, J.
name: Ansari, R.
name: Aubourg, E.
name: Bareyre, P.
name: Bauer, F.
name: Beaulieu, J. P.
name: Blanc, G.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a measurement of the microlensing optical depth toward the Galactic bulge based on the analysis of 15 contiguous1 square degrees fields centered on (l=2.5 deg, b=-4.0 deg) and containing 1.42 million clump-giant stars (belonging to the extended clump area) monitored during almost three bulge seasons by EROS (Experience de Recherche d'Objets Sombres). We find a microlensing optical depth towards the bulge tau_bulge=0.94 +/- 0.29 10^-6 averaged over all fields, based on 16 microlensing events with clump giants as sources. This value is substantially below several other determinations by the MACHO and OGLE groups and is more in agreement with what is expected from axisymmetric and non-axisymmetric bulge models.
description: 18 pages, 15 images, accepted for publication in A&A
Real-time, non-contact, cellular imaging and angiography of human cornea and limbus with common-path Full-field/SDOCT
Creators: name: Mazlin, Viacheslav
name: Xiao, Peng
name: Scholler, Jules
name: Irsch, Kristina
name: Grieve, Kate
name: Fink, Mathias
name: Boccara, A. Claude
Publisher: name: arXiv
Year: 2020
Subjects: subject: Medical Physics (physics.med-ph)
subject: Image and Video Processing (eess.IV)
subject: FOS: Physical sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: In today's clinics, a cellular-resolution view of the cornea can be achieved only with an in vivo confocal microscope (IVCM) in contact with the eye. Here, we present a common-path Full-field/Spectral-domain OCT microscope (FF/SD OCT), which, for the first time, enables cell-detail imaging of the entire ocular surface (central and peripheral cornea, limbus, sclera, tear film) without contact and in real time. The device, which has been successfully tested in human subjects, is now ready for direct implementation in clinical research. Real-time performance is achieved through rapid axial eye tracking and simultaneous defocusing correction. Images, extracted from real-time videos, contain cells and nerves, which can be quantified over a millimetric field-of-view, beyond the capability of IVCM and conventional OCT. In the limbus, Palisades of Vogt, vessels and blood flow can be resolved with high contrast without contrast agent injection. The fast imaging speed of 275 frames/s (0.6 billion pixels/s) allowed direct monitoring of blood flow dynamics, enabling creation of high-resolution velocity maps for the first time. Tear flow velocity and evaporation time could be measured without fluorescein administration.
Thermal transport enhancement of hybrid nanocomposites; impact of confined water inside nanoporous silicon
Creators: name: Isaiev, Mykola
name: Wang, Xiaorui
name: Termentzidis, Konstantinos
name: Lacroix, David
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The thermal transport properties of porous silicon and nano-hybrid "porous silicon/water" systems are presented here. The thermal conductivity was evaluated with equilibrium molecular dynamics technique for porous systems made of spherical voids or water-filled cavities. We revealed large thermal conductivity enhancement in the nano-hybrid systems as compared to their dry porous counterparts, which cannot be captured by effective media theory. This rise of thermal conductivity is related to the increases of the specific surface of the liquid/solid interface. We demonstrated that significant difference for more than two folds of thermal conductivity of pristine porous silicon and "porous silicon liquid/composite" is due to the liquid density fluctuation close to "solid/liquid interface" (layering effect). This effect is getting more important for the high specific surface of the interfacial area. Specifically, the enhancement of the effective thermal conductivity is 50 % for specific surface area of 0.3 (1/nm), and it increases further upon the increase of the surface to volume ratio. Our study provides valuable insights into the thermal properties of hybrid liquid/solid nanocomposites and about the importance of confined liquids within nanoporous materials.
Validation of patient-specific flatfoot models on finite element analysis
Creators: name: Kobayashi, Yumiko
name: Ikoma, Kazuya
name: Maki, Masahiro
name: Imai, Kan
name: Kido, Masamitsu
name: Okubo, Naoki
name: Sotozono, Yasutaka
name: Wang, Zhongkui
name: Hirai, Shinichi
name: Tanaka, Masaki
name: Takahashi, Kenji
Publisher: name: Taylor & Francis
Year: 2024
Subjects: Medicine
Environmental Sciences not elsewhere classified
Biological Sciences not elsewhere classified
Mathematical Sciences not elsewhere classified

description: Adult-acquired flatfoot causes various deformities. If a patient-specific foot model can be created using the finite element method, it can be used to study the appropriate surgical technique for each patient. Nine patient-specific flatfoot models were created, and loading simulations were performed. To validate the models, the patients’ weight-bearing radiographs were compared with the parameters of the models. The CCC values ranged from 0.917 to 0.993 , all exceeding the moderate threshold according to the McBride criteria. Our model reproduces the biomechanics of a patient’s foot under loading conditions, which may be useful for investigating patient-specific surgical procedures.
Stellar rotation periods from K2 Campaigns 0-18 -- Evidence for rotation period bimodality and simultaneous variability decrease
Creators: name: Reinhold, Timo
name: Hekker, Saskia
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Rotation period measurements of stars observed with the Kepler mission have revealed a lack of stars at intermediate rotation periods, accompanied by a decrease of photometric variability. Whether this so-called dearth region is a peculiarity of stars in the Kepler field, or reflects a general manifestation of stellar magnetic activity, is still under debate. Our goal is to measure stellar rotation periods and photometric variabilities for tens of thousands of K2 stars, located in different fields along the ecliptic plane, to shed light on the relation between stellar rotation and photometric variability. We use Lomb-Scargle periodograms, auto-correlation and wavelet functions to determine consistent rotation periods. Stellar brightness variability is assessed by computing the variability range from the light curve. We further apply Gaussian mixture models to search for bimodality in the rotation period distribution. Combining measurements from all K2 campaigns, we detect rotation periods in 29,860 stars. For effective temperatures below 6000K, the variability range shows a local minimum at different periods, consistent with an isochrone age of 750 Myr. Additionally, the K2 rotation period distribution shows evidence for bimodality, although the dearth region is less pronounced compared to the Kepler field. The period at the dip of the bimodal distribution shows good agreement with the period at the local variability minimum. We conclude that the period bimodality is present in different fields of the sky, and is hence a general manifestation of stellar magnetic activity. The reduced variability in the dearth region is interpreted as a cancelation between dark spots and bright faculae. Our results strongly advocate that the role of faculae has been underestimated so far, suggesting a more complex dependence of the brightness variability on the rotation period.
description: 14 pages, 13+3 figures
Penna - qualitative data collecting platform
Creators: name: Paivarinta, Jarkko
Publisher: name: Zenodo
Year: 2018

description: This poster presents Penna, a new qualitative data collecting platform created by the Finnish Social Science Data Archive (FSD) in collaboration with Tampere University Computer Sciences students. The tool is designed principally for collecting written narratives, but it adapts easily to other kinds of qualitative textual data too, such as open open-ended questionnaires. Using Penna for data collection gives the FSD a great advantage when it comes to archiving data. With Penna we get the data already in a harmonised format including all the metadata needed. We can also be assured that the research participants have been properly informed and consent to data archiving and sharing has been granted. The Penna platform is maintained by the FSD and is offered free of charge to researchers, students, and data collecting organisations that are willing to archive their data afterwards for academic secondary use. This is a great way to promote reciprocity in the academic field; we help researchers with their data gathering, and in return, they open the data for secondary use. At the IASSIST 2018 poster session we will explain more precisely how Penna works and share the benefits of this approach with our colleagues in the data repository network.
THE INTERSECTION OF HUMAN RIGHTS VIOLATIONS AND THE RESPONSIBILITY TO PROTECT IN LIBYA
Creators: name: Emeka Chijioke, Nwosu
Publisher: name: NOLAND JOURNALS
Year: 2024
Subjects: Uprising, human rights violations, responsibility to protect, revolution, military intervention

description: The 2011 Libyan Uprising was marked by widespread human rights violations, including extrajudicial killings, torture, and attacks on civilians by both state and non-state actors. These atrocities led to the invocation of the Responsibility to Protect (R2P) doctrine by the United Nations, resulting in a controversial military intervention. While the intervention aimed to protect civilians, it also raised significant legal, political, and operational challenges, questioning the effectiveness and legitimacy of R2P in complex conflict situations. Therefore, this study aims to critically examine the challenges and prospects of applying R2P in cases of gross human rights violations, using Libya as a case study. The study is anchored on two theories within the domain of International Relations: Human Security and Constructivism theories. These frameworks help to analyze the protection of human rights and the international community’s response to humanitarian crises. The study employs a qualitative design, utilizing content analysis to examine relevant literature, UN reports, and scholarly articles on the Libyan Uprising and R2P. The study found that while R2P was effective in preventing immediate atrocities in Libya, but its implementation revealed significant legal ambiguities, political challenges, and operational shortcomings. The intervention led to prolonged instability and civil conflict, highlighting the need for comprehensive post-conflict strategies and consistent application of R2P across different crises. The study recommended that future R2P interventions should integrate robust post-conflict peacebuilding strategies to ensure sustainable stability and prevent the recurrence of violence and human rights abuses
Twin branching in shape memory alloys: a 1D model with energy dissipation effects
Creators: name: Stupkiewicz, Stanislaw
name: Amini, Seyedshoja
name: Rezaee-Hajidehi, Mohsen
Publisher: name: arXiv
Year: 2024
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We develop a 1D model of twin branching in shape memory alloys. The free energy of the branched microstructure comprises the interfacial and elastic strain energy contributions, both expressed in terms of the average twin spacing treated as a continuous function of the position. The total free energy is then minimized, and the corresponding Euler-Lagrange equation is solved numerically using the finite element method. The model can be considered as a continuous counterpart of the recent discrete model of Seiner et al. (2020), and our results show a very good agreement with that model in the entire range of physically relevant parameters. Furthermore, our continuous setting facilitates incorporation of energy dissipation into the model. The effect of rate-independent dissipation on the evolution of the branched microstructure is thus studied. The results show that significant effects on the microstructure and energy of the system are expected only for relatively small domain sizes.
The Parallax, Mass and Age of the PSR J2145-0750 binary system
Creators: name: Loehmer, O.
name: Kramer, M.
name: Driebe, T.
name: Jessner, A.
name: Mitra, D.
name: Lyne, A. G.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present results of timing measurements of the binary millisecond pulsar PSR J2145-0750. Combining timing data obtained with the Effelsberg and Lovell radio telescopes we measure a significant timing parallax of 2.0(6) mas placing the system at 500 pc distance to the solar system. The detected secular change of the projected semi-major axis of the orbit $\dot x=1.8(6)\times 10^{-14}$ lt-s s$^{-1}$, where $x=(a_{\rm p}\sin i)/c$, is caused by the proper motion of the system. With this measurement we can constrain the orbital inclination angle to $i<61\degr$, with a median likelihood value of $46\degr$ which is consistent with results from polarimetric studies of the pulsar magnetosphere. This constraint together with the non-detection of Shapiro delay rules out certain combinations of the companion mass, $m_2$, and the inclination, $i$. For typical neutron star masses and using optical observations of the carbon/oxygen-core white dwarf we derive a mass range for the companion of $0.7 M_\odot\leq m_2\leq 1.0 M_\odot$. We apply evolutionary white dwarf cooling models to revisit the cooling age of the companion. Our analysis reveals that the companion has an effective temperature of $T_{\rm eff}=5750\pm600$ K and a cooling age of $τ_{\rm cool}=3.6(2)$ Gyr, which is roughly a factor of three lower than the pulsar's characteristic age of 10.4 Gyr. The cooling age implies an initial spin period of $P_0=13.0(5)$ ms, which is very close to the current period.
description: 11 pages, 5 figures, accepted for publication in A&A
Deposit, curate, publish, repeat: Developing a workflow for research data in the Duke Digital Repository
Creators: name: Lafferty-Hess, Sophia
name: Darragh, Jennifer
name: Downey, Moira
name: Ivey, Susan
name: Sedlins, Mara
Publisher: name: Zenodo
Year: 2018

description: In 2017 the Duke University Libraries (DUL) launched a suite of research data management services. One facet of our service model is to provide permanent archiving and curation of Duke research data in the Duke Digital Repository (DDR). This poster will illustrate the workflow we developed for accepting deposits, performing a curatorial review of data, and publishing data within the DDR. Reviewing data deposits prior to publication has allowed the research data management (RDM) team at DUL to help ensure deposits meet (at least) minimum standards for access and reuse. Our current curation workflow helps catch accidental submission errors, allows us to educate researchers on best practices for data documentation, and enables us to make suggestions for how to best format data for portability, interoperability, and preservation as well as enhance dataset metadata for discovery. The staffing model for supporting these curation services will also be detailed on the poster.
Probing a stationary non-Gaussian background of stochastic gravitational waves with pulsar timing arrays
Creators: name: Powell, Cari
name: Tasinato, Gianmassimo
Publisher: name: arXiv
Year: 2019
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We introduce the concept of stationary graviton non-Gaussianity (nG), an observable that can be probed in terms of 3-point correlation functions of a stochastic gravitational wave (GW) background. When evaluated in momentum space, stationary nG corresponds to folded bispectra of graviton nG. We determine 3-point overlap functions for testing stationary nG with pulsar timing array GW experiments, and we obtain the corresponding optimal signal-to-noise ratio. For the first time, we consider 3-point overlap functions including scalar graviton polarizations (which can be motivated in theories of modified gravity); moreover, we also calculate 3-point overlap functions for correlating pulsar timing array with ground based GW detectors. The value of the optimal signal-to-noise ratio depends on the number and position of monitored pulsars. We build geometrical quantities characterizing how such ratio depends on the pulsar system under consideration, and we evaluate these geometrical parameters using data from the IPTA collaboration. We quantitatively show how monitoring a large number of pulsars can increase the signal-to-noise ratio associated with measurements of stationary graviton nG.
description: 25 pages,13 figures
Long term memories of developed and emerging markets: using the scaling analysis to characterize their stage of development
Creators: name: Di Matteo, T.
name: Aste, T.
name: Dacorogna, M. M.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Other Condensed Matter (cond-mat.other)
subject: Statistical Finance (q-fin.ST)
subject: FOS: Physical sciences
subject: FOS: Economics and business

description: The scaling properties encompass in a simple analysis many of the volatility characteristics of financial markets. That is why we use them to probe the different degree of markets development. We empirically study the scaling properties of daily Foreign Exchange rates, Stock Market indices and fixed income instruments by using the generalized Hurst approach. We show that the scaling exponents are associated with characteristics of the specific markets and can be used to differentiate markets in their stage of development. The robustness of the results is tested by both Monte-Carlo studies and a computation of the scaling in the frequency-domain.
description: 46 pages, 7 figures, accepted for publication in Journal of Banking & Finance
Community choice in municipal debt financing: some factors which influence a community's decision to undertake debt
Creators: name: Wandschneider, Philip
name: Kliem, Ralph
name: Wandschneider, Philip
name: Kliem, Ralph
Publisher: name: Unknown
Year: 1981
Subjects: Community/Rural/Urban Development
Financial Economics

description: A survey of local officials and analysis of election outcomes revealed that (1) availability of grants and loans, (2) cost, (3) voter knowledge, (4) voter turnout, and (5) fiscal conservation are key factors influencing a community's approval or non-approval of bond issues in small Washington communities.
重新播种本地物种通过改善物种多样性、生态位和种间西北干旱区的荒漠草原中国
Creators: name: jiang, hai
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 410203
subject: Ecosystem function
classificationCode: 410401
subject: Conservation and biodiversity
classificationCode: 300210
subject: Sustainable agricultural development

description: 重新播种本地物种通过改善物种多样性、生态位和种间西北干旱区的荒漠草原中国
Hamster Neurula (after turning)
Creators: name: E.A. (Elly) Langewis
Publisher: name: Utrecht University
Year: 2020
Subjects: Developmental Biology

description: Object: Microscopic slides (19)Platform: PathXLOrganism: Cricetus auratus (Hamster)Subject: Neurula (after turning)Orientation: Cross sectionStaining: SilverMagnification: 40xZ-stacks: no
The Lund Model at Nonzero Impact Parameter
Creators: name: Janik, Romuald A.
name: Peschanski, Robi
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We extend the formulation of the longitudinal 1+1 dimensional Lund model to nonzero impact parameter using the minimal area assumption. Complete formulae for the string breaking probability and the momenta of the produced mesons are derived using the string worldsheet Minkowskian helicoid geometry. For strings stretched into the transverse dimension, we find probability distribution with slope linear in m_T similar to the statistical models but without any thermalization assumptions.
description: 12 pages, 2 .eps figures, footnotes added, results unchanged, version to be published in Phys.Lett.B
The Cepheid Distance to NGC 5236 (M 83) with the VLT
Creators: name: Thim, Frank
name: Tammann, G. A.
name: Saha, A.
name: Dolphin, A.
name: Sandage, Allan
name: Tolstoy, E.
name: Labhardt, Lukas
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Cepheids have been observed in NGC 5236 (M 83) using the ANTU (UT1) 8.2 meter telescope of the ESO VLT with FORS1. Observations over 34 epochs in V and I have been made between January 2000 and July 2001. Twelve Cepheid candidates have periods between 12 and 55 days. The true distance modulus is adopted to be (m-M)_0 = 28.25 +/- 0.15, which corresponds to a distance of 4.5 +/- 0.3 Mpc. The distance of NGC 5253 has been rediscussed. The mean distance of (m-M)_0 = 28.01 +/- 0.15 (based on SN 1972E) shows the galaxy to be a close neighbor of M 83 (separation = 0.5 +/- 0.4 Mpc), suggesting that the two galaxies may have interacted in the past and thus possibly explaining the amorphous morphology of NGC 5253. M 83 is the principal member of the nearby M 83 group containing also, besides NGC 5253, several dwarf members, for five of which TRGB distances are available (Karachentsev et al. 2002a, A&A, 385, 21). The adopted group distance of (m-M)_0 = 28.28 +/- 0.10 (4.5 +/- 0.2 Mpc) together with its mean recession velocity of v_LG = 249 +/- 42 km/s shows again the extreme quietness of the local (1 Mpc to 10 Mpc) expansion field. M 83 fits onto the local mean Hubble flow line of the velocity-distance relation (with H_0 ~ 60) with no significant deviation, supporting the earlier conclusion that the local velocity expansion field is remarkably cold on a scale of 10 Mpc, contrary to the predictions of the simplest cold dark matter model for large scale structure. The role of a cosmological constant has been invoked as a possible solution in providing a nearly uniform force field everywhere in the presence of a lumpy galaxy distribution. (abridged)
description: 29 pages, 10 figures (reduced quality), 4 tables, accepted for publication in the Astrophysical Journal. A version with the original figures and a FITS finding chart is available at http://www.noao.edu/staff/dolphin
Data ever after: Tackling data reference questions at the library
Creators: name: Kubas, Alicia
name: McBurney, Jenny
Publisher: name: Zenodo
Year: 2018

description: Questions about locating hard-to-find data, including international data, historical and time series data, and microdata are on the rise. These questions range across subject areas, including economics, politics, health, business, and agriculture, and in addition to the challenge of merely finding this data, users often lack general data literacy skills when first asking their research questions. In order to learn more about the landscape of secondary data reference and how librarians can better support researchers and users in this area, data-focused librarians at the University of Minnesota developed a survey targeting library staff in the United States that work with data-related questions. This poster summarizes and draws conclusions from the survey, which focused on the types of data questions received and from whom, how librarians tackle these questions, frustrations they experience, and opportunities for increasing expertise in this area of librarianship.
Axial anomaly in the reduced model: Higher representations
Creators: name: Inagaki, Teruaki
name: Kikukawa, Yoshio
name: Suzuki, Hiroshi
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: The topological charge in the $\U(N)$ vector-like reduced model can be defined by using the overlap Dirac operator. We obtain its large $N$ limit for a fermion in a general gauge-group representation under a certain restriction of gauge field configurations which is termed $\U(1)$ embedding.
description: 3 pages, Lattice2003(chiral)
An Extreme X-ray Variability Event of a Weak-Line Quasar
Creators: name: Ni, Qingling
name: Brandt, W. N.
name: Yi, W.
name: Luo, B.
name: Timlin, J. D.
name: Hall, P. B.
name: Liu, Hezhen
name: Plotkin, R. M.
name: Shemmer, O.
name: Vito, F.
name: Wu, Jianfeng
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We report the discovery of an extreme X-ray flux rise (by a factor of > 20) of the weak-line quasar SDSS J153913.47+395423.4 (hereafter SDSS J1539+3954) at z = 1.935. SDSS J1539+3954 is the most-luminous object among radio-quiet type 1 AGNs where such dramatic X-ray variability has been observed. Before the X-ray flux rise, SDSS J1539+3954 appeared X-ray weak compared with the expectation from its UV flux; after the rise, the ratio of its X-ray flux and UV flux is consistent with the majority of the AGN population. We also present a contemporaneous HET spectrum of SDSS J1539+3954, which demonstrates that its UV continuum level remains generally unchanged despite the dramatic increase in the X-ray flux, and its C iv emission line remains weak. The dramatic change only observed in the X-ray flux is consistent with a shielding model, where a thick inner accretion disk can block our line of sight to the central X-ray source. This thick inner accretion disk can also block the nuclear ionizing photons from reaching the high-ionization broad emission-line region, so that weak high-ionization emission lines are observed. Under this scenario, the extreme X-ray variability event may be caused by slight variations in the thickness of the disk. This event might also be explained by gravitational light-bending effects in a reflection model.
description: 8 pages, 3 figures. Accepted for publication in ApJL
Sequential collision-free optimal motion planning algorithms in punctured Euclidean spaces
Creators: name: Zapata, Cesar A. Ipanaque
name: González, Jesús
Publisher: name: arXiv
Year: 2019
Subjects: subject: Algebraic Topology (math.AT)
subject: FOS: Mathematics

description: In robotics, a topological theory of motion planning was initiated by M. Farber. The multitasking motion planning problem is new and its theoretical part via topological complexity has hardly been developed, but the concrete implementations are still non-existent, and in fact this work takes the first step in this last direction (producing explicit algorithms.) We present optimal motion planning algorithms which can be used in designing practical systems controlling objects moving in Euclidean space without collisions between them and avoiding obstacles. Furthermore, we present the multitasking version of the algorithms.
description: 10 pages, 4 figures. arXiv admin note: substantial text overlap with arXiv:1911.03859; text overlap with arXiv:1906.03239
Minimal Grand Unification Model in an Anthropic Landscape
Creators: name: Calmet, Xavier
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: It has been recently pointed out by Arkani-Hamed and Dimopoulos that if the universe is a landscape of vacua, and if therefore fine-tuning is not a valid guidance principle for searching for physics beyond the standard model, supersymmetric unification only requires the fermionic superpartners. We argue that in that landscape scenario, the fermionic superpartners are not needed for unification, which can be achieved in SO(10) either via a direct breaking to the standard model at the grand unification scale or through an intermediate gauge symmetry. In most minimal SO(10) models, the proton lifetime is long enough to avoid the experimental bounds. These models are the truly minimal fine-tuned extensions of the standard model in the sense proposed by Davoudiasl et al..
description: 11 pages
From literacy to acumen: Opportunities for librarians in undergraduate data science education
Creators: name: Young, Sarah
Publisher: name: Zenodo
Year: 2018

description: With the rapid growth in data access and availability, there has been a growing need across sectors for expertise in turning data into actionable knowledge. Data science has emerged as a discipline to address this need and data science programs are increasingly common in institutions of higher education. In early 2018, the National Academies of Sciences, Engineering and Medicine will present a report to "set forth a vision for the emerging discipline of data science at the undergraduate level". A recently released interim report highlights the need for a curriculum that teaches "data acumen", or the ability to "make good judgements and decisions with data". Given the infancy of this discipline, and current efforts to shape its future, librarians have an opportunity to work with educators to enrich the data science curriculum to realize the National Academies' vision. I will map existing information literacy and data information literacy frameworks to the forthcoming framework of the National Academies for data science education. I will identify areas of synergy and potential new competencies that will be needed to support this cross-domain discipline. I will also examine curricula in undergraduate data science programs to consider current challenges and opportunities for librarian engagement.