cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
A Sea of Emigration Options: The Pathways for Tuvalu and the Republic of Marshall Islands
Creators: name: Constable, Amy Louise
Publisher: name: The Australian National University
Year: 2014

description: Climate change is a multi-faceted policy issue that poses severe risks to small low-lying atoll states. The impacts of climate change include ocean acidification, sea level rise, coastal erosion, agriculture and aquaculture losses, and severe weather damage to key infrastructure. Tuvalu and the Republic of the Marshall Islands are small low-lying atoll-based states who are vulnerable to environmental change, and are already experiencing social pressures, such as lack of access to freshwater and high levels of population density on urban atolls. The compounded impacts of environmental and social pressures are expected to affect the liveability of atolls and require residents to emigrate. This study identifies and analyses the adequacy of emigration options for Tuvalu and the Republic of the Marshall Islands (RMI) residents following climate change impacts. Using qualitative data from a review of related literature on emigration policy, a media discourse analysis and eight semi-structured interviews, I identify ten possible emigration options related to climate change impacts. Through critical analysis I find that all ten proposed options are incompatible with current legal structures, accessibility and customary land tenure in other Pacific island nations. The research findings suggest that climate change immigration may not be an urgent policy issue for 25-30 years. In closing I recognise the necessity of using the next few decades to develop policy framework for climate change related emigration, and to overcome the identified issues associated with legality, accessibility and customary landownership in Pacific island nations.
Supplementary methods and analyses from Testing the carotenoid-based sexual signalling mechanism by altering CYP2J19 gene expression and colour in a bird species
Creators: name: Cantarero, Alejandro
name: Andrade, Pedro
name: Carneiro, Miguel
name: Moreno-Borrallo, Adrián
name: Alonso-Alvarez, Carlos
Publisher: name: The Royal Society
Year: 2020
Subjects: subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: Ecology
subject: 60801 Animal Behaviour

description: Additional methods and complementary analyses, tables and figures
D2.1 - Citizen engagement plan
Creators: name: Emmanuel Chaniotakis
name: Sofoklis Sotiriou
name: Jens Koslowsky
name: Claudia Magdalena Fabian
name: Elisabeth Unterfrauner
name: Juliet Tschank
name: Beatriz García
name: Wanda Diaz-Merced
Publisher: name: Zenodo
Year: 2021

description: This document outlines the results of the work implemented in the tasks 2.1 to 2.3 in WP2. It summarises
the outcomes of a “Scan the Horizon” effort, namely an exhaustive literature review on citizen engagement
in citizen science, and the design, deployment and first results of a target group study as part of the
Citizens’ Survey, followed by an initial task analysis of the REINFORCE demonstrator projects. It concludes
outlining the key features of the conceptualised dynamic engagement strategy in REINFORCE which will be
implemented throughout the remaining project duration and coordinated by activities of WP8
(Participatory Engagement Activities).
Average multipolarity of continuum transitions in nuclei at high angular momentum
Creators: name: Steyaert, J.
name: Cornelis, K.
name: Michel, C.
name: van Klinken, J.
name: Lhersonneau, G.
name: Feenstra, S.J.
name: Janssens, R.
name: Huyse, M.
name: Vervier, J.
name: Pijn, J.P.
Publisher: name: Elsevier
Year: 1979

description: The multipolarity of continuum transitions deexciting high-spin states has been deduced from measured conversion coefficients. The investigated 146Nd(20Ne, 4n or 5n) 162,161Yb reactions were selected by gating on discrete lines. The average multipolarity gradually changes from E2 at 0.5 MeV to E1 above 1.5 MeV.
Distributed mean curvature on a discrete manifold for Regge calculus
Creators: name: Conboye, Rory
name: Miller, Warner A.
name: Ray, Shannon
Publisher: name: arXiv
Year: 2015
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The integrated mean curvature of a simplicial manifold is well understood in both Regge Calculus and Discrete Differential Geometry. However, a well motivated pointwise definition of curvature requires a careful choice of volume over which to uniformly distribute the local integrated curvature. We show that hybrid cells formed using both the simplicial lattice and its circumcentric dual emerge as a remarkably natural structure for the distribution of this local integrated curvature. These hybrid cells form a complete tessellation of the simplicial manifold, contain a geometric orthonormal basis, and are also shown to give a pointwise mean curvature with a natural interpretation as a fractional rate of change of the normal vector.
Genetic Parameter Estimates for Eucalyptus pellita in the Markham Valley, Papua New Guinea
Creators: name: Cox, Jordan
Publisher: name: The Australian National University
Year: 2019

description: There is increasing interest globally in bioenergy, and the role of woody biomass in energy generation. This is also the case in the Markham Valley of Papua New Guinea, where an energy company has proposed a biomass energy project based on plantations of the tropical tree, Eucalyptus pellita F. Muell. This thesis explores the potential for genetic improvement of E. pellita for biomass production in the Markham Valley, using data from four genetic trials in which 180 mostly open-pollinated families from 7 provenance groups were represented. The results presented in this thesis are the first reliable genetic parameter estimates for Eucalyptus pellita in Papua New Guinea. Genetic parameter estimates for E. pellita growth and acoustic velocity from these trials were in accordance with expectations from the literature. Single-site narrow-sense heritability for DBH (at 24 and 36 months) ranged between 0.17 and 0.40. Cross-sites narrow-sense heritability estimates for DBH (at 24 and 36 months) range between 0.12 and 0.16 using both raw (clean, quality controlled) and standardised data. Narrow-sense heritability for acoustic-velocity was estimated as 0.73 in a single-site analysis, undertaken at a site where heritability estimates for growth traits were high. Type-A (trait-trait correlations performed at single-site) genetic correlation results also conformed to expectations from the literature. Height and growth assessments were highly correlated at the same age. Acoustic-velocity had relatively low correlations with growth traits at several assessment ages. This result implies that the prospects for simultaneously improving both growth and density are good. Type-B genetic correlations (site-site genetic correlations, approximated from EBVs produced by single-site at all four sites) identified substantial cross-site GxE interaction at these early ages, suggesting further investigation of genotype performance across potential plantation sites. Families from one from provenance group, ‘Dabua’, consistently displayed the best performance across the four trial sites, suggesting this provenance as the preferred source of further genetic resources for breeding populations for the Markham Valley. These results indicate that the early efforts to improve breeding populations in the Markham Valley can be expected to bring about substantial productivity improvements in subsequent generations of commercially established plantations. They also identify a number of topics for further research, principally the wider assessment of wood density and of genotype-environment interaction in a plantation production context.
Intensity and multipolarity of low-energy components in the quasicontinuum γ-ray spectrum following α- And C12-induced reactions
Creators: name: De Voigt, M.J.A.
name: Sujkowski, Z.
name: Chmielewska, D.
name: Janssens, R.V.F.
Publisher: name: American Physical Society
Year: 1979

description: Measurements of K-shell ionization yields for (α,xn) and (C12,xn) evaporation residues exclude the existence of a large M1 component in the quasicontinuum spectrum of well-deformed Dy nuclei below 500 keV. Upper intensity limits are deduced for M1, E1, and E2 components.
Lifetimes of high-spin yrast states in 154Er
Creators: name: Aguer, P.
name: Janssens, R.
name: Michel, C.
name: El Masri, Y.
name: Vervier, J.
name: Hubert, P.
name: Bastin, G.
name: Thibaud, J.P.
name: Charmant, A.
Publisher: name: Elsevier
Year: 1979

description: Lifetimes for high-spin levels (between about 10 and 30 h{stroke}) in 154Er have been measured by the recoil-distance method. Non-collective, moderately collective and collective E2 transitions from states with lifetimes between at most 10 and 400 ps have been found. All available data on this nucleus are discussed within the framework of the oblate coupling scheme with the addition of collective degrees of freedom.
Cross-cultural adaptation and validation of the Chinese version of the ankle joint functional assessment tool (AJFAT) questionnaire
Creators: name: Li, Jinfeng
name: Qiu, Fanji
name: Legerlotz, Kirsten
Publisher: name: Humboldt-Universität zu Berlin
Year: 2023
Subjects: subject: Ankle sprains
subject: CAI
subject: Cumberland ankle instability tool
subject: Cut off value
subject: Reliability and validity evaluation
subject: 610 Medizin und Gesundheit

description: The article processing charge was funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) – 491192747 and the Open Access Publication Fund of Humboldt-Universität zu Berlin.
description: Background: Ankle joint functional assessment tool (AJFAT) is gradually becoming a popular tool for diagnosing functional ankle instability (FAI). However, due to the lack of standard Chinese versions of AJFAT and reliability and validity tests, the use of AJFAT in the Chinese population is limited. This study aimed to translate and cross-culturally adapt the AJFAT from English into Chinese, and evaluate the reliability and validity of the Chinese version of AJFAT and to investigate its psychometric properties. Methods: The translation and cross-cultural adaptation of AJFAT was performed according to guidelines for cross-cultural adaptation of self-report measures. 126 participants with a history of ankle sprain completed the AJFAT-C twice within 14 days and completed the Cumberland ankle instability tool (CAIT-C) once. Test–retest reliability, internal consistency, ceiling and floor effects, convergent and structure validity and discriminative ability were investigated. Results: The test–retest reliability (ICC = 0.91, 95%CI = 0.87–0.94) and internal consistency (Cronbach’s alpha = 0.87) of the AJFAT-C were excellent. No ceiling or floor effects were detected. A moderate correlation between the AJFAT-C and the CAIT-C suggested a moderate convergent validity. The AJFAT-C had a two-factor structure: 1. function of the unstable side of the ankle joint (9 items) and 2. symptoms of the unstable side of the ankle (2 items). The ideal cut-off point of the AJFAT-C was calculated as 26 points. Conclusion: The Chinese version of AJFAT can be considered as a valid and reliable ankle joint function evaluation tool that can be applied in clinical and research work.
Reversing Hydride Ion Formation in Quantum Information Experiments with Be$^+$
Creators: name: Sawyer, Brian C.
name: Bohnet, Justin G.
name: Britton, Joseph W.
name: Bollinger, John J.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Atomic and Molecular Clusters (physics.atm-clus)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We demonstrate photodissociation of BeH$^+$ ions within a Coulomb crystal of thousands of $^9$Be$^+$ ions confined in a Penning trap. Because BeH$^+$ ions are created via exothermic reactions between trapped, laser-cooled Be$^+$($^2\text{P}_{3/2}$) and background H$_2$ within the vacuum chamber, they represent a major contaminant species responsible for infidelities in large-scale trapped-ion quantum information experiments. The rotational-state-insensitive dissociation scheme described here makes use of 157 nm photons to produce Be$^+$ and H as products, thereby restoring Be$^+$ ions without the need for reloading. This technique facilitates longer experiment runtimes at a given background H$_2$ pressure, and may be adapted for removal of MgH$^+$ and AlH$^+$ impurities.
description: 6 pages, 3 figures
title: Leadership Reimagined: The Evolution of Servant Leadership in International Consultancies
Creators: name: Reim, Jakob
Publisher: name: TU Wien
Year: 2024
Subjects: subject: Qualitative Analysis
subject: Leadership Behaviors
subject: Employee Growth
subject: Organizational Performance

description: This master's thesis examines the effectiveness and use of servant leadership in international consulting firms. The defined research questions aim to explore how and whether servant leadership is used, if other leadership styles are used and what the core priorities of leaders are. In order to explore this, ten semi-structured expert interviews were conducted consisting of five leaders and five led employees, who have direct working relationships on projects. According to the analysis of the interviews, Servant Leadership is the most frequently and strongly practiced form of leadership, followed by Situational and Transactional Leadership. The interviewsconducted revealed that the most important key leadership behaviours a leader should have are adaptability and flexibility, conflict management, effective communication and transparency, empathy and emotional intelligence, employee engagement and autonomy, employee growth and mentorship, inspiration and team motivation, recognition and positive reinforcement, reflection and self-awareness, strategic goal setting, confidence building and empowerment, and work-life balanceand support. Another finding of this research is the establishment of the Convergent Leadership Styles (CLS), which combines the most commonly used leadership styles, Servant, Situational and Transactional Leadership, the twelve most important behaviours of a leader, the environmental influences of international consulting firms and establishes a holistic context. This leadership style emphasizes the necessity and importance of balancing employee growth and well-being with business success. In conclusion, this study is an extension of the existing literature and provides deep insights into the leadership styles currently practiced in international consulting firms.From these insights, an optimized leadership style, the convergent leadership style, was developed. This thesis can provide a basis for researchers who aim to extend the existing data with quantitative surveys or long-term studies.
DCOMEX_D6.2b_20220905
Creators: name: Cumming, B.
name: Stavroulakis, G.
name: Christodoulou, T.
name: Fink, A.
name: Amoudruz, L.
Publisher: name: Zenodo
Year: 2022

description: Report on project's deliverable 6.2b: The DCoMEX Framework Prototype
Exploring the Dust Content of Galactic Winds with Herschel. I. NGC 4631
Creators: name: Meléndez, M.
name: Veilleux, S.
name: Martin, C.
name: Engelbracht, C.
name: Bland-Hawthorn, J.
name: Cecil, G.
name: Heitsch, F.
name: McCormick, A.
name: Müller, T.
name: Rupke, D.
name: Teng, S. H.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present a detailed analysis of deep far-infrared observations of the nearby edge-on star-forming galaxy NGC 4631 obtained with the Herschel Space Observatory. Our PACS images at 70 and 160 um show a rich complex of filaments and chimney-like features that extends up to a projected distance of 6 kpc above the plane of the galaxy. The PACS features often match extraplanar Halpha, radio-continuum, and soft X-ray features observed in this galaxy, pointing to a tight disk-halo connection regulated by star formation. On the other hand, the morphology of the colder dust component detected on larger scale in the SPIRE 250, 350, and 500 um data matches the extraplanar H~I streams previously reported in NGC 4631 and suggests a tidal origin. The PACS 70/160 ratios are elevated in the central ~3.0 kpc region above the nucleus of this galaxy (the "superbubble"). A pixel-by-pixel analysis shows that dust in this region has a higher temperature and/or an emissivity with a steeper spectral index (beta > 2) than the dust in the disk, possibly the result of the harsher environment in the superbubble. Star formation in the disk seems energetically insufficient to lift the material out of the disk, unless it was more active in the past or the dust-to-gas ratio in the superbubble region is higher than the Galactic value. Some of the dust in the halo may also have been tidally stripped from nearby companions or lifted from the disk by galaxy interactions.
description: Accepted for publication in The Astrophysical Journal
Advancements in 1D and 2D near-surface seismic site characterization using surface waves and full waveform inversion
Creators: name: Yust, Michael Benjamin Schutt
name: 0000-0003-2857-3591
Publisher: name: The University of Texas at Austin
Year: 2022
Subjects: Site characterization
Distributed acoustic sensing
Full waveform inversion
Earthquakes

description: Seismic site characterization is a critical part of understanding earthquake hazards in geotechnical engineering. This is often accomplished through various invasive and non-invasive methods for measuring shear-wave velocity (Vs) in-situ, as it is directly related to small-strain shear modulus. For civil engineering applications, the seismic conditions of the near surface (top 30 m) are of particular interest. Surface wave testing has become the tool of choice for many engineers due to its flexibility, efficiency, and ability to characterize a wide variety of subsurface conditions. Surface wave testing is also particularly well suited to near-surface imaging due to the prevalence of surface waves within the elastic wavefield at shallow depths. Surface wave testing, however, is not without limitations. Inversion of surface wave dispersion data is ill-posed and non-unique, meaning that when it is performed rigorously with full consideration of epistemic uncertainty, a potentially large number of reasonable and different 1D Vs profiles are produced. This presents a challenge of evaluating which profiles should be used for further analysis or design. Additionally, engineers often desire information about the lateral variability of seismic parameters in the subsurface, but the inherently 1D nature of the processing and inversion techniques used in surface wave testing make acquiring this information challenging. Evaluation of lateral variability is generally accomplished through multiple individual 1D surface wave analyses across the site, providing only pseudo-2D information. This also introduces a new challenge: how to collect the large amount of experimental data required for multiple analyses as the efficiency of traditional surface wave acquisition is limited by the need to physically move geophone arrays with limited numbers of sensors. This dissertation discusses these challenges and presents potential solutions through the application of the DeltaVs method, distributed acoustic sensing, and full waveform inversion.
Fragments' internal and kinetic temperatures in the framework of a Nuclear Statistical Multifragmentation Model
Creators: name: Souza, S. R.
name: Carlson, B. V.
name: Donangelo, R.
name: Lynch, W. G.
name: Tsang, M. B.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The agreement between the fragments' internal and kinetic temperatures with the breakup temperature is investigated using a Statistical Multifragmentation Model which makes no a priori as- sumption on the relationship between them. We thus examine the conditions for obtaining such agreement and find that, in the framework of our model, this holds only in a relatively narrow range of excitation energy. The role played by the qualitative shape of the fragments' state densities is also examined. Our results suggest that the internal temperature of the light fragments may be affected by this quantity, whose behavior may lead to constant internal temperatures over a wide excitation energy range. It thus suggests that the nuclear thermometry may provide valuable information on the nuclear state density.
description: 8 pages, 6 figures
Towards a new determination of the QCD Lambda parameter from running couplings in the three-flavour theory
Creators: name: Brida, M. Dalla
name: Fritzsch, P.
name: Korzec, T.
name: Ramos, A.
name: Sint, S.
name: Sommer, R.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We review our new strategy and current status towards a high precision computation of the Lambda parameter from three-flavour simulations in QCD. To reach this goal we combine specific advantages of the Schrödinger functional and gradient flow couplings.
description: 7 pages, 3 figures; Proceedings of the 32nd International Symposium on Lattice Field Theory; 23-28 June, 2014, Columbia University, New York
Delete File
Creators: name: Habib, Saimun
Publisher: name: Zenodo
Year: 2023

description: In Burkina Faso, political unrest, conflict, and violence are regular threats to stability. This produces environments which can change the risk calculus towards family planning. To anticipate population and humanitarian needs during and after tumult, it’s important to understand the effect of violence on contraceptive use and intentions towards family planning. However, the effects of violence can be widespread and have varying influence across a region. The processes these are linked by are inherently spatiotemporal. Causal inference in this setting is not well developed, thus the aim of this project is to put forth a nonparametric methodology and framework for causal estimation in spatiotemporal phenomena via a graphical modelling approach. Spatiotemporal systems violate the assumptions that go into a causal analysis such as the Stable Unit Treatment Variance Assumption (SUTVA). Prior work in the potential outcome framework shows how to accommodate the quirks of spatiotemporal processes. This research aims for the same using graphical models. A framework using graphical models can equip decision makers with simple and accessible tools for explaining complicated processes. This approach simplifies combining statistical and subject matter expertise in a nonparametric framework.
Rat Bronchoalveolar Lavage Proteome Changes Following E-cigarette Aerosol Exposures
Creators: name: McGraw, Matthew
name: Qian, Wei-Jun
Publisher: name: figshare
Year: 2023
Subjects: Proteomics and intermolecular interactions (excl. medical proteomics)

description: Supplemental material to e-cigarette BAL proteomics manuscript at AJP Lung
Tidal Torques on Misaligned Disks in Binary Systems
Creators: name: Lubow, Stephen H.
name: Martin, Rebecca G.
name: Nixon, Chris
Publisher: name: arXiv
Year: 2014
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We extend previous studies of the tidal truncation of coplanar disks in binary systems to the more general case of noncoplanar disks. As in the prograde coplanar case, Lindblad resonances play a key role in tidal truncation. We analyze the tidal torque acting on a misaligned nearly circular disk in a circular orbit binary system. We concentrate on the 2:1 inner Lindblad resonance associated with the m=2 tidal forcing (for azimuthal wavenumber m) that plays a major role in the usual coplanar case. We determine the inclination dependence of this torque, which is approximately cos^8(i/2) for misalignment angle i. Compared to the prograde coplanar case (i=0), this torque decreases by a factor of about 2 for i = pi/6 and by a factor of about 20 for i=pi/2. The Lindblad torque decreases to zero for a tilt angle of pi (counter-rotation), consistent with previous investigations. The effects of higher order resonances associated with m>2 tidal forcing may contribute somewhat, but are much more limited than in the i=0 case. These results suggest that misaligned disks in binary systems can be significantly extended compared to their coplanar counterparts. In cases where a disk is sufficiently inclined and viscous, it can overrun all Lindblad resonances and overflow the Roche lobe of the disk central object.
description: To appear in the Astrophysical Journal, 13 pages, 6 figures
A new method for reconstructing the muon lateral distribution with an array of segmented counters
Creators: name: Ravignani, D.
name: Supanitsky, A. D.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Although the origin of ultra high energy cosmic rays is still unknown, significant progress has been achieved in last decades with the construction of large arrays that are currently taking data. One of the most important pieces of information comes from the chemical composition of primary particles. It is well known that the muon content of air showers generated by the interaction of cosmic rays with the atmosphere is rather sensitive to primary mass. Therefore, the measurement of the number of muons at ground level is an essential ingredient to infer the cosmic ray mass composition. In this work we present a new method for reconstructing the muon lateral distribution function with an array of segmented counters. The energy range from .4 to 2.5 EeV is considered. For a triangular array spaced at 750 m we found that 450 m is the optimal distance to evaluate the number of muons. The corresponding statistical and systematic uncertainties of the new and of a previous reconstruction methods are compared. Since the statistical uncertainty of the new reconstruction is less than in the original one, the power to discriminate between heavy and light cosmic ray primaries is enhanced. The detector dynamic range is also extended in the new reconstruction, so events falling closer to a detector can be included in composition studies.
description: Accepted for publication in Astroparticle Physics
Energy dependence of fusion evaporation-residue cross sections in the Si28+28Si reaction
Creators: name: Trotter, R.S.
name: Ikezoe, H.
name: Prosser, F.W.
name: Kolata, J.J.
name: Stephans, G.S.F.
name: Bauer, J.S.
name: Gosdin, C.H.
name: Hinnefeld, J.D.
name: Rosner, G.
name: Wilkins, B.D.
name: Beck, C.
name: Kovar, D.G.
name: Vineyard, M.F.
name: Chowdhury, P.
name: Henderson, D.J.
name: Kuhn, W.
name: Mateja, J.F.
name: Maguire, C.F.
name: Janssens, R.V.F.
Publisher: name: American Physical Society
Year: 1990

description: Velocity distributions of mass-identified evaporation residues produced in the t28/rSi+28Si reaction have been measured at bombarding energies of 174, 215, 240, 309, 397, and 452 MeV using time-of-flight techniques. These distributions were used to identify evaporation residues and to separate the complete-fusion and incomplete-fusion components. Angular distributions and total cross sections were extracted at all six bombarding energies. The complete-fusion evaporation-residue cross sections and the deduced critical angular momenta are compared with lower energy data and the predictions of existing models.
FAIR-IMPACT virtual clinic for open call for support for Research Performing Organisations, Repositories and Data Service Providers, and National Level Initiatives
Creators: name: Davidson, Joy
name: Brinkman, Loek
name: Dumouchel, Suzanne
Publisher: name: Zenodo
Year: 2023
Subjects: FAIR Implementation Support
FAIR-IMPACT

description: These slides were presented during a virtual clinic for potential applicants to the FAIR-IMPACT open call for Route 1 support. The clinic provided an overview of the Route 1 support programmes for Research Performing Organisations, Repositories and Data Service Providers, and National Level Initiatives. The session also provided an informal opportunity for potential applicants to ask the FAIR-IMPACT team any questions they had about the support actions, eligibility, and the application process.
Dynamical Properties of Collisionless Star Streams
Creators: name: Carlberg, Raymond G.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: A sufficiently extended satellite in the tidal field of a host galaxy loses mass to create nearly symmetric leading and trailing tidal streams. We study the case in which tidal heating drives mass loss from a low mass satellite. The stream effectively has two dynamical components, a common angular momentum core superposed with episodic pulses with a broader angular momentum distribution. The pulses appear as spurs on the stream, oscillating above and below the stream centerline, stretching and blurring in configuration space as they move away from the cluster. Low orbital eccentricity streams are smoother and have less differential motion than high eccentricity streams. The tail of a high eccentricity stream can develop a fan of particles which wraps around at apocenter in a shell feature. We show that scaling the essentially stationary action-angle variables with the cube root of the satellite mass allows a low mass satellite stream to accurately predict the features in the stream from a satellite a thousand times more massive. As a practical astrophysical application, we demonstrate that narrow gaps in a moderate eccentricity stream, such as GD-1, blur out to 50\% contrast over approximately 6 radial periods. A high eccentricity stream, such as Pal~5, will blur small gaps in only radial 2 orbits as can be understood from the much larger dispersion of angular momentum in the stream.
description: ApJ accepted
Real-time observation of epitaxial graphene domain reorientation
Creators: name: Rogge, Paul C.
name: Thürmer, Konrad
name: Foster, Michael E.
name: McCarty, Kevin F.
name: Dubon, Oscar D.
name: Bartelt, Norman C.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Graphene films grown by vapor deposition tend to be polycrystalline due to the nucleation and growth of islands with different in-plane orientations. Here, using low-energy electron microscopy, we find that micron-sized graphene islands on Ir(111) rotate to a preferred orientation during thermal annealing. We observe three alignment mechanisms: the simultaneous growth of aligned domains and dissolution of rotated domains, i.e., "ripening"; domain-boundary motion within islands; and continuous lattice-rotation of entire domains. By measuring the relative growth velocity of domains during ripening, we estimate that the driving force for alignment is on the order of 0.1 meV per C atom and increases with rotation angle. A simple model of the orientation-dependent energy associated with the moiré corrugation of the graphene sheet due to local variations in the graphene-substrate interaction reproduces the results. This work suggests new strategies for improving the van der Waals epitaxy of 2D materials.
Phase transitions in one-dimensional static Coulomb media
Creators: name: Malyshev, V. A.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mathematical Physics (math-ph)
subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 82C21

description: We consider configurations of $N$ charged particles on the interval with nearest neighbour Coulomb interaction and constant external force. For different values of external force we find 4 different phases of the asymptotic particle density for the configuration corresponding to the minimum of the energy.
Warm Dark Matter in Two Higgs Doublet Models
Creators: name: Babu, K. S.
name: Chakdar, Shreyashi
name: Mohapatra, Rabindra N.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We show that a neutral scalar field, σ, of two Higgs doublet extensions of the Standard Model incorporating the seesaw mechanism for neutrino masses can be identified as a consistent {\it warm} dark matter candidate with a mass of order keV. The relic density of $σ$ is correctly reproduced by virtue of the late decay of a right-handed neutrino N participating in the seesaw mechanism. Constraints from cosmology determine the mass and lifetime of N to be M_N = 25 GeV - 20 TeV and τ_N = (10^{-4} - 1) sec. These models can also explain the 3.5 keV X-ray anomaly in the extra-galactic spectrum that has been recently reported in terms of the decay σ\to γγ. Future tests of these models at colliders and in astrophysical settings are outlined.
description: 16 pages, 3 figures
Lithographically Defined Micropost Arrays for Programmable Actuation and Interfacial Hydrodynamics
Creators: name: Cribb, J.
name: Superfine, R.
name: Brooks, J.T.
name: Falvo, M.R.
Publisher: name: American Chemical Society
Year: 2021

description: Magnetically actuating surface-attached post (ASAP) arrays have great potential in microfluidic flow control, including mixing and pumping. Both passive (nonactuating) and active (actuating) micropillar arrays can also be used to control pressure-driven flow and the motion of microscopic particles carried by the fluid through microfluidic channels. Molding techniques are popular for generating these microstructures. However, fabricating high aspect ratio elastomeric microstructures over large surface areas suffers from practical problems such as damage incurred in the demolding process. Here, we report on a fabrication protocol that generates ASAP with an aspect ratio as high as 23:1 and a cross-sectional area less than 1 μm2 using straightforward photolithography processes. We generated 50 unique ASAP arrays, each occupying an area of 1 mm2 on a silicon mold; these arrays have varied cross-sectional shape and size, aspect ratio, and spacings between neighboring posts. Our protocol also controls the level of magnetic material in the ASAP tips with a centrifugation step. Using a herringbone pattern ASAP array, we have demonstrated control over the relative phase of actuation between neighboring posts. Such ASAP serve as an experimental platform to test current models predicting that reciprocal actuators in close proximity can successfully drive flow in a low Reynolds (Re) number environment.
Disentangling the magnetoelectric and thermoelectric transport in topological insulator thin films
Creators: name: Zhang, Jinsong
name: Feng, Xiao
name: Xu, Yong
name: Guo, Minghua
name: Zhang, Zuocheng
name: Ou, Yunbo
name: Feng, Yang
name: Li, Kang
name: Zhang, Haijun
name: Wang, Lili
name: Chen, Xi
name: Gan, Zhongxue
name: Zhang, Shou-Cheng
name: He, Ke
name: Ma, Xucun
name: Xue, Qi-Kun
name: Wang, Yayu
Publisher: name: arXiv
Year: 2015
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We report transport studies on (Bi,Sb)2Te3 topological insulator thin films with tunable electronic band structure. We find a doping and temperature regime in which the Hall coefficient is negative indicative of electron-type carriers, whereas the Seebeck coefficient is positive indicative of hole-type carriers. This sign anomaly is due to the distinct transport behaviors of the bulk and surface states: the surface Dirac fermions dominate magnetoelectric transport while the thermoelectric effect is mainly determined by the bulk states. These findings may inspire new ideas for designing topological insulator-based high efficiency thermoelectric devices.
description: 9 figures
Digitālo rīku un resursu lietotāju 'piecminūšu aptaujas' metodoloģija un kods / 'Five-minute survey' for users of digital tools and resources: methodology and code
Creators: name: Daugavietis, Jānis
name: Kunda, Ilona
name: Karlsone, Agnese
name: Kristāla, Ance
Publisher: name: Zenodo
Year: 2022
Subjects: DH
UX
LimeSurvey
survey code
digitālie rīki un resursi
aptauja

description: [EN below] Digitālo rīku un resursu lietotāju ‘piecminūšu aptaujas’ metodoloģija un kods Ar mērķi, lai Latvijas digitālu humanitāro zinātņu rīku un resursu (DH RR) uzturētāji varētu veikt standartizētas, atkārtojamas un viegli izmantojamas savu rīku un resursu lietotāju aptaujas [..]. Galvenais uzstādījums bija izveidot tādu aptauju, kas ir maksimāli īsa, respondentus nenogurdinoša un neatbiedējoša, tai pat laikā sniedzot būtiskākos datus par DH RR lietojamību, tādus, kas nav iegūstami ar Google Analytics rīku vai analizējot lietošanas statistiku (log data). Te deponēts: Metodoloģiskais apraksts, anketa (trīs valodās). Aptauju rīka LimeSurvey struktūra [faili, kods]. Aptaujas metodoloģija izstrādāta un aptauja veikta Valsts pētījuma programmas "Humanitāro zinātņu digitālie resursi" projekta "Humanitāro zinātņu digitālie resursi: integrācija un attīstība" (Nr. VPP-IZM-DH-2020/1-0001) (DH VPP) ietvaros. http://www.digitalhumanities.lv/projekti/DHVPP/ ‘Five-minute survey’ for users of digital tools and resources: methodology and code With the aim to enable Latvian digital humanities tools and resources (DH RR) maintainers to conduct standardised, repeatable and easy-to-use surveys of their tools and resources users [..]. The main objective was to create a survey that is as short as possible, not tiring or intimidating for the respondents, while at the same time providing the most relevant data on the usability of DH RR, data that cannot be obtained with Google Analytics or by analysing usage statistics (log data). Deposited here: 1. Methodological description, questionnaire (in three languages). 2. Structure of the LimeSurvey survey tool [files, code] (in three languages). Acknowledgements. The survey methodology was developed and the survey was carried out within the framework of the National Research Programme "Digital Resources for the Humanities" project "Digital Resources for the Humanities: integration and development" (No. VPP-IZM-DH-2020/1-0001) (DH NPP). http://www.digitalhumanities.lv/projects/DHVPP-en/
Additional file 18 of Transcriptomic profiling reveals histone acetylation-regulated genes involved in somatic embryogenesis in Arabidopsis thaliana
Creators: name: Wójcikowska, Barbara
name: Chwiałkowska, Karolina
name: Nowak, Katarzyna
name: Citerne, Sylvie
name: Morończyk, Joanna
name: Wójcik, Anna Maria
name: Kiwior-Wesołowska, Agnieszka
name: Francikowski, Jacek
name: Kwaśniewski, Mirosław
name: Gaj, Małgorzata Danuta
Publisher: name: figshare
Year: 2024
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 18: Legends
A High Availability Clusters Model Combined with Load Balancing and Shared Storage Technologies for Web Servers
Creators: name: Moniruzzaman, A B M
name: Waliullah, Md.
name: Rahman, Md. Sadekur
Publisher: name: arXiv
Year: 2014
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences

description: This paper designs and implements a high availability clusters and incorporated with load balance infrastructure of web servers. The paper described system can provide full facilities to the website hosting provider and large business organizations. This system can provide continuous service though any system components fail uncertainly with the help of Linux Virtual Server (LVS) loadbalancing cluster technology and combined with virtualization as well as shared storage technology to achieve the three-tier architecture of Web server clusters. This technology not only improves availability, but also affects the security and performance of the application services being requested. Benefits of the system include node failover overcome; network failover overcome; storage limitation overcome and load distribution.
description: 6 pages. arXiv admin note: text overlap with arXiv:1311.3070 by other authors
Additional file 1 of Democratizing cheminformatics: interpretable chemical grouping using an automated KNIME workflow
Creators: name: Moreira-Filho, José T.
name: Ranganath, Dhruv
name: Conway, Mike
name: Schmitt, Charles
name: Kleinstreuer, Nicole
name: Mansouri, Kamel
Publisher: name: figshare
Year: 2024
Subjects: subject: Artificial Intelligence and Image Processing
subject: FOS: Computer and information sciences
subject: Information Systems

description: Additional file 1. Additional tables and figures of the user interface and functionalities of the workflow.
Ground-Based Transit Observations of the Super-Earth 55 Cnc e
Creators: name: de Mooij, E. J. W.
name: Lopez-Morales, M.
name: Karjalainen, R.
name: Hrudkova, M.
name: Jayawardhana, R.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We report the first ground-based detections of the shallow transit of the super-Earth exoplanet 55 Cnc e using a 2-meter-class telescope. Using differential spectrophotometry, we observed one transit in 2013 and another in 2014, with average spectral resolutions of ~700 and ~250, spanning the Johnson BVR photometric bands. We find a white-light planet-to-star radius ratio of 0.0190 -0.0027+0.0023 from the 2013 observations and 0.0200 -0.0018+0.0017 from the 2014 observations. The two datasets combined results in a radius ratio of 0.0198 -0.0014+0.0013. These values are all in agreement with previous space-based results. Scintillation noise in the data prevents us from placing strong constraints on the presence of an extended hydrogen-rich atmosphere. Nevertheless, our detections of 55 Cnc e in transit demonstrate that moderate-size telescopes on the ground will be capable of routine follow-up observations of super-Earth candidates discovered by the Transiting Exoplanet Survey Satellite (TESS) around bright stars. We expect it will be also possible to place constraints on the atmospheric characteristics of those planets by devising observational strategies to minimize scintillation noise.
description: Accepted for publications in ApJL
Correlating nuclear morphology and external force with combined atomic force microscopy and light sheet imaging separates roles of chromatin and lamin A/C in nuclear mechanics
Creators: name: Kern, M.
name: Falvo, M.R.
name: O'Brien, E.T.
name: Hobson, C.M.
name: Superfine, R.
name: Stephens, A.D.
Publisher: name: American Society for Cell Biology
Year: 2020

description: Nuclei are often under external stress, be it during migration through tight constrictions or compressive pressure by the actin cap, and the mechanical properties of nuclei govern their subsequent deformations. Both altered mechanical properties of nuclei and abnormal nuclear morphologies are hallmarks of a variety of disease states. Little work, however, has been done to link specific changes in nuclear shape to external forces. Here, we utilize a combined atomic force microscope and light sheet microscope to show SKOV3 nuclei exhibit a two-regime force response that correlates with changes in nuclear volume and surface area, allowing us to develop an empirical model of nuclear deformation. Our technique further decouples the roles of chromatin and lamin A/C in compression, showing they separately resist changes in nuclear volume and surface area, respectively; this insight was not previously accessible by Hertzian analysis. A two-material finite element model supports our conclusions. We also observed that chromatin decompaction leads to lower nuclear curvature under compression, which is important for maintaining nuclear compartmentalization and function. The demonstrated link between specific types of nuclear morphological change and applied force will allow researchers to better understand the stress on nuclei throughout various biological processes.
Analyzing Multi-Field Tunneling With Exact Bounce Solutions
Creators: name: Aravind, Aditya
name: DiNunno, Brandon S.
name: Lorshbough, Dustin
name: Paban, Sonia
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study multi-field tunneling using exact solutions for additive potentials. We introduce a binomial potential with non-integer powers that could be considered a generalization of the $4D$ Fubini instanton potential. Using scaling arguments, we show that for multi-field potentials taller and wider barriers may still lead to a smaller bounce action.
description: 16 pages, 2 figures, 1 table
A survey of physical methods for studying nuclear mechanics and mechanobiology
Creators: name: Hobson, C.M.
name: Superfine, R.
name: Falvo, M.R.
Publisher: name: American Institute of Physics Inc.
Year: 2021

description: It is increasingly appreciated that the cell nucleus is not only a home for DNA but also a complex material that resists physical deformations and dynamically responds to external mechanical cues. The molecules that confer mechanical properties to nuclei certainly contribute to laminopathies and possibly contribute to cellular mechanotransduction and physical processes in cancer such as metastasis. Studying nuclear mechanics and the downstream biochemical consequences or their modulation requires a suite of complex assays for applying, measuring, and visualizing mechanical forces across diverse length, time, and force scales. Here, we review the current methods in nuclear mechanics and mechanobiology, placing specific emphasis on each of their unique advantages and limitations. Furthermore, we explore important considerations in selecting a new methodology as are demonstrated by recent examples from the literature. We conclude by providing an outlook on the development of new methods and the judicious use of the current techniques for continued exploration into the role of nuclear mechanobiology.
A statistical correlation of sunquakes based on their seismic, white light, and X-ray emission
Creators: name: Buitrago-Casas, J. C.
name: Oliveros, J. C. Martinez
name: Lindsey, C.
name: Calvo-Mozo, B.
name: Krucker, S.
name: Glesener, L.
name: Zharkov, S.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Several mechanisms have been proposed to explain the transient seis- mic emission, i.e., sunquakes, from some solar flares. Some theories associate high-energy electrons and/or white-light emission with sunquakes. High-energy charged particles and their subsequent heating of the photosphere and/or chro- mosphere could induce acoustic waves in the solar interior. We carried out a correlative study of solar flares with emission in hard-X rays (HXRs), enhanced continuum emission at 6173Å, and transient seismic emission. We selected those flares observed by RHESSI (Reuven Ramaty High Energy Solar Spectroscopic Imager) with a considerable flux above 50 keV between January 1, 2010 and June 26, 2014. We then used data from the Helioseismic and Magnetic Imager onboard the Solar Dynamic Observatory (SDO/HMI) to search for excess visible continuum emission and new sunquakes not previously reported. We found a total of 18 sunquakes out of 75 investigated. All of the sunquakes were associated with a enhancement of the visible continuum during the flare time. Finally, we calculated a coefficient of correlation for a set of dichotomic variables related to these observations. We found a strong correlation between two of the standard helioseismic detection techniques, and between sunquakes and visible continuum enhancements. We discuss the phenomenological connectivity between these physical quantities and the observational difficulties of detecting seismic signals and excess continuum radiation.
description: Submitted to Solar Physics