cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Predicting the Trajectory of a Relativistic Electron Beam for External Injection in Plasma Wakefields
Creators: name: Asmus, Felipe Peña
name: Velotti, Francesco Maria
name: Turner, Marlene
name: Gessner, Spencer
name: Martyanov, Mikhail
name: Bracco, Chiara
name: Goddard, Brennan
name: Muggli, Patric
Publisher: name: arXiv
Year: 2020
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: FOS: Physical sciences

description: We use beam position measurements over the first part of the AWAKE electron beamline, together with beamline modeling, to deduce the beam average momentum and to predict the beam position in the second part of the beamline. Results show that using only the first five beam position monitors leads to much larger differences between predicted and measured positions at the last two monitors than when using the first eight beam position monitors. These last two positions can in principle be used with ballistic calculations to predict the parameters of closest approach of the electron bunch with the proton beam. In external injection experiments of the electron bunch into plasma wakefields driven by the proton bunch, only the first five beam position monitors measurements remain un-affected by the presence of the much higher charge proton bunch. Results with eight beam position monitors show the prediction method works in principle to determine electron and proton beams closest approach within the wakefields width ($
description: seven pages, five figures, submitted for EAAC 2019 Proceedings
Efficient and Effective ER with Progressive Blocking
Creators: name: Galhotra, Sainyam
name: Firmani, Donatella
name: Saha, Barna
name: Srivastava, Divesh
Publisher: name: arXiv
Year: 2020
Subjects: subject: Databases (cs.DB)
subject: FOS: Computer and information sciences

description: Blocking is a mechanism to improve the efficiency of Entity Resolution (ER) which aims to quickly prune out all non-matching record pairs. However, depending on the distributions of entity cluster sizes, existing techniques can be either (a) too aggressive, such that they help scale but can adversely affect the ER effectiveness, or (b) too permissive, potentially harming ER efficiency. In this paper, we propose a new methodology of progressive blocking (pBlocking) to enable both efficient and effective ER, which works seamlessly across different entity cluster size distributions. pBlocking is based on the insight that the effectiveness-efficiency trade-off is revealed only when the output of ER starts to be available. Hence, pBlocking leverages partial ER output in a feedback loop to refine the blocking result in a data-driven fashion. Specifically, we bootstrap pBlocking with traditional blocking methods and progressively improve the building and scoring of blocks until we get the desired trade-off, leveraging a limited amount of ER results as a guidance at every round. We formally prove that pBlocking converges efficiently ($O(n log^2 n)$ time complexity, where n is the total number of records). Our experiments show that incorporating partial ER output in a feedback loop can improve the efficiency and effectiveness of blocking by 5x and 60% respectively, improving the overall F-score of the entire ER process up to 60%.
description: Galhotra, S., Firmani, D., Saha, B. et al. Efficient and effective ER with progressive blocking. The VLDB Journal (2021)
Crustulina guttata
Creators: name: Isaia, Marco
name: Paschetta, Mauro
name: Chiarle, Alberto
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Theridiidae
Crustulina
Crustulina guttata

description: Crustulina guttata (Wider, 1834)
NEW DATA. — Valdieri: southern slope of Monte Bourel, Vallone della Meris, Sant’Anna di Valdieri, Alpine prairies with rocky debris, 1500-2300 m, 1-31.VIII.2011 (pitfall traps), 1♀.
 LITERATURE. — Paschetta et al. (2013).
CHOROTYPE. — PAL.
MACROHABITAT. — Alpine prairies.
description: Published as part of Isaia, Marco, Paschetta, Mauro & Chiarle, Alberto, 2015, Annotated checklist of the spiders (Arachnida, Araneae) of the Site of Community Importance and Special Area of Conservation " Alpi Marittime " (NW Italy), pp. 57-114 in Zoosystema 37 (1) on page 64, DOI: 10.5252/z2015n1a4, http://zenodo.org/record/4577680
Attributions and self-acceptance among homeless individuals : implications for behaviour and well-being
Creators: name: Khan, Alisa R.
Publisher: name: University of British Columbia
Year: 2011

description: Objective: The current study longitudinally examined the role of the attributions homeless individuals made for the cause of and solution to their homelessness in predicting their progress toward exiting homelessness as well as their psychological wellbeing. Attributions were measured according to Brickman and colleagues' (1982) model of helping and coping, which assesses the degree to which the cause of and solution to problems are attributed internally versus externally. We also investigated the role of global self-acceptance in predicting behaviour and well-being. Design: 69 individuals who were homeless in the previous 6 months were interviewed at baseline and 4-week follow-up. Attributions, self-acceptance, and several demographic variables were measured at baseline. Outcome variables included ratings of progress toward exiting homelessness based on coding the behaviours from participants' descriptions of their typical days, as well as depressive symptoms and satisfaction with life. Outcomes were measured both at baseline and follow-up. Results: Hierarchical multiple regression analyses revealed that to the extent that participants made internal attributions for the cause of their homelessness, they made less progress towards exiting homelessness over the 4-week follow-up, whereas more internal attributions for the solution to homelessness predicted greater progress toward exiting homelessness. Results also indicated that greater self-acceptance predicted decreased depressive symptoms and increased satisfaction with life, while attributions about homelessness were not related to these well-being outcomes.
What Can We Learn From The ADM Global Price Conspiracies - A Discussion
Creators: name: Kilmer, Richard L.
name: Kilmer, Richard L.
Publisher: name: Unknown
Year: 1998
Subjects: Industrial Organization

description: John Connor's paper is an excellent paper given its in depth description and detail of the citric acid price fixing case involving ADM and others. I will use this information to discuss the structural realignments that have taken place in the citric acid market and the their effects on farmers, consumers, and citric acid market participants. This objective is in keeping with the stated objectives of this conference.
Social ties and social support of reentrants and probationers: examining the relationship with individual and neighborhood characteristics
Creators: name: Burns, Willow
Publisher: name: ProQuest
Year: 2023
Subjects: classificationCode: 4402
subject: Criminology
subject: FOS: Law
classificationCode: 4410
subject: Sociology
subject: FOS: Sociology

description: This study examines whether the neighborhood one lives has an effect on social ties and social support in parolees and probationers. Data used for the analyses is from the SHARRPP study.
title: Nutrient availability modulating physiology and pathogenicity of Legionella pneumophila
Creators: name: James, Brian William
Publisher: name: The Open University
Year: 1997

description: A virulent strain of Legionella pneumophila serogroup 1 was established in continuous culture under defined iron-replete conditions at pH 6.9. Iron-limitation and extremes of pH (6.0 and 7.8) influenced the growth and metabolism of L. pneumophila, as manifested by increased metabolic activity, impaired energy coupling, and altered metabolic fluxes. In particular, the physiological versatility of L. pneumophila was demonstrated by a significant decrease in the iron content of biomass (6-fold increase in Yiron), coupled with reduced metabolic efficiency (Ycarbon), in response to iron-limited growth. Iron limitation promoted the accumulation of significant intracellular reserves of poly- ß-hydroxybutyrate (16 % cell dry wt.), which supported long-term survival of L. pneumophila under starvation conditions.

Expression of the important pathogenicity factor, the zinc metalloprotease, was regulated by iron availability. Common iron acquisition mechanisms, such as siderophores and transferrin receptors, were not elaborated by iron-limited cells. However, human transferrin was identified as a potential iron source for L. pneumophila, with the zinc metalloprotease mediating transferrin digestion and possibly iron acquisition. Iron-limitation and extremes of pH also influenced cellular morphology and the surface properties of L. pneumophila, promoting the formation of uniform cultures of short rod-shaped bacteria, with altered fatty acid, phospholipid and protein composition.

In addition to morphological and physiological adaptation, iron limitation had a significant effect on the virulence of L. pneumophila. Iron-replete cells grown at pH 6.9 and 6.0 were highly virulent in a guinea pig model. However, the virulence of L. pneumophila was significantly attenuated (P < 0.05) in response to iron-limited growth. This phenomenon was reversible, and correlated with reduced phagocytosis and / or reduced intracellular survival following infection. Decreasing the pH of iron-limited cultures to 6.0 did not stimulate recovery of culture virulence. Therefore, this study clearly demonstrates that environmental stresses, including iron limitation and extremes of pH, play an important role in modulating the physiology and virulence of L. pneumophila, inducing the expression of distinct phenotypes differing in their ability to persist in nature and cause infection.
Förderung der Motivation durch Ermutigung und Feedback
Creators: name: Kubli, Susan
Publisher: name: Zenodo
Year: 2018
Subjects: Sonderpädagogik
Lernverhalten
Motivation
Masterarbeit

description: In Lern- und Leistungsprozessen nimmt die Motivation eine wichtige Rolle ein; sie wirkt sich auf gegenwärtiges und zukünftiges Lernverhalten aus und ist Voraussetzung und Ziel schulischer Bildung. In der vorliegenden Masterarbeit wird untersucht, wie bestärkende verbale Rückmeldungen die Lernmotivation unterstützen können. Mit der Methode des hermeneutischen Zirkels werden Quellen aus Pädagogik und Psychologie sowie empirische Studien bearbeitet und deduktiv Merksätze abgeleitet. Dabei zeigt sich, dass Ermutigung und Feedback für die Motivation im gesamten Lernprozess von der Initiierung der Handlung über deren Durchführung bis zum Abschluss von Bedeutung sind. Die Stärkung der Selbstwirksamkeitserwartung und Konzepte wie Zielorientierung, mentales Kontrastieren, Umsetzungsvorsätze oder attributionales Feedback erweisen sich als förderlich im Hinblick auf eine langfristige Lernmotivation.
Das jungpleistozäne Lössprofil von Nussloch (SW-Wand) im Aufschluss der Heidelberger Zement AG
Creators: name: Bibus, Erhard
name: Frechen, Manfred
name: Kösel, Michael
name: Rähle, Wolfgang
Publisher: name: Geozon Science Media
Year: 2007

description: Im Aufschluss Nußloch südlich von Heidelberg ist ein neu aufgeschlossener Lößrücken paläopedologisch aufgenommen und ein Standardprofil mit verschiedenen Methoden untersucht worden. Im Einzelnen wurden Sedimentanalysen (Korngrößen, Kohlenstoff, Kalkgehalt) und die magnetische Suszeptibilität bestimmt, biomorphologische und malakologische Untersuchungen durchgeführt sowie 27 Proben mit der IRSL-Methode datiert. Stratigraphisch umfasst der untersuchte Abschnitt das Jungpleistozän mit einem mehrgliedrigen Eem-Boden und einem ungewöhnlich mächtigen Würmlöß (ca. 18 m). Bodentypologisch wurden ein Bt-Horizont, eine Humuszone und zahlreiche Nassböden von unterschiedlicher Intensität mit und ohne Verbraunungszone nachgewiesen. Von den fünf ausgewiesenen Verbraunungszonen (WB2 - WB6) sind WB2, WB4 und WB5 aufgrund der Molluskenführung als interstadiale Bildungen anzusehen. Hinzu kommt noch eine der drei interstadialen Mosbacher Humuszonen (WB1) im stark reduzierten Altwürmabschnitt mit einem Alter von ca. 75 ka BP. Als kräftigster Interstadialboden ist der Bv-Horizont einer arktischen Braunerde erkannt worden (WB4), welcher aufgrund verschiedener Kriterien mit dem Lohner Boden bei ca. 30 ka BP parallelisiert wurde. Der im Hangenden des Lohner Bodens überlieferte Jungwürmlöß ist mit 12 m für Mitteleuropa sehr mächtig und von zahlreichen Nassböden (mindestens 10) untergliedert. Besonders aufgespaltet ist der Bereich des E2-Nassbodens, in dem auch die Böden WB5 und WB6 mit schwachen Verbraunungszonen liegen. Auch der jüngste Jungwürmlöß über dem Leithorizont des Eltviller Tuffs ist mit 4,5 m relativ mächtig und mehrgliedrig überliefert, so dass von einem E4/E5-Komplex gesprochen wird. Die paläopedologischen Befunde stimmen hervorragend mit den Veränderungen in der Molluskenfauna und der Suszeptibilitätskurve überein, so dass detaillierte stratigraphische und paläoklimatische Rekonstruktionen möglich sind. Die absoluten Altersdatierungen bestätigen dabei weitgehend die vorgenommenen Alterseinstufungen. Abschließend wird das neu bearbeitete Profil in Nußloch mit Ergebnissen von ANTOINE et al. (2001) verglichen, welche im gleichen Aufschluss an anderer Stelle erzielt worden sind.
description: research
Schistoloma sectilabrum
Creators: name: Páll-Gergely, Barna
name: Nguyen, Phi Khanh
name: Chen, Yansen
Publisher: name: Zenodo
Year: 2019
Subjects: Biodiversity
Taxonomy
Animalia
Mollusca
Gastropoda
Architaenioglossa
Pupinidae
Schistoloma
Schistoloma sectilabrum

description: Schistoloma sectilabrum (A. Gould, 1844)
 Cyclostoma sectilabrum Gould, 1844: 459, plate 24, fig. 10 (type locality: “Tavoy” [from the title]).
 Schistoloma sectilabrum — Kobelt, 1902: 280.
 Schistoloma sectilabrum — Thach, 2016: 38, figs. 119–120.
 Schistoloma sectilabrum — Egorov, 2013: 14, fig. 22d–f.
 Distribution. See Remarks.
 Remarks. Thach (2016) mentioned this species from southern Vietnam (Ninh Hoa District, Khanh Hoa Province), far from all other known localities in the Malay Peninsula, Myanmar (Tavoy and Tenasserim) and Thailand (Tumpeesuwan & Panha, 2008). This species seems to have the largest range in the entire genus.
 Two samples (SMF 262529 = “ holotype ” and SMF 262530 = “ paratypes ”) found in the SMF were labelled as “ Schistoloma siamensis Brandt” with the following locality data: “ Thailand: an den Tanto-Fällen bei Ban Nong Star; Yala Provinz, leg. Brandt, 18-7-1964, No. 1968/1”. However, the name “ Schistoloma siamensis ” was never published, and is not available.
description: Published as part of Páll-Gergely, Barna, Nguyen, Phi Khanh & Chen, Yansen, 2019, A review of Vietnamese Schistoloma Kobelt, 1902 with a list of all known species of the genus (Caenogastropoda: Cyclophoroidea: Pupinidae), pp. 322-327 in Raffles Bulletin of Zoology 67 on pages 325-326, DOI: 10.26107/RBZ-2019-0023, http://zenodo.org/record/4577058
Evolution and seismology of alpha Centauri
Creators: name: Montalban, Josefina
name: Miglio, Andrea
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Solar-like oscillations detected in both components of the binary system alpha Centauri provide strong constraints on the fundamental parameters of the stellar system. We model alpha Centauri by means of a Levenberg-Marquardt minimization algorithm including seismic and classical constraints. Computations, that were perfomed decreasing significanly the weight of alpha Cen B seismic data in the calibration procedure, predict small separations in good agreement with new observations of solar-like oscillations in alpha Cen B by Bedding (these proceedings).
description: 2 pages, 1 figure, Workshop on Stellar Pulsation & Evolution 2005 (Rome)
Hidden toric symmetry and structural stability of singularities in integrable systems
Creators: name: Kudryavtseva, Elena A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Symplectic Geometry (math.SG)
subject: Differential Geometry (math.DG)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 53D12, 53D20, 37J35, 70H06

description: The goal of the paper is to develop a systematic approach to the study of (perhaps degenerate) singularities of integrable systems and their structural stability. As the main tool, we use "hidden" system-preserving torus actions near singular orbits. We give sufficient conditions for the existence of such actions and show that they are persistent under integrable perturbations. We find toric symmetries for several infinite series of singularities and prove, as an application, structural stability of Kalashnikov's parabolic orbits with resonances in the real-analytic case. We also classify all Hamiltonian $k$-torus actions near a singular orbit on a symplectic manifold $M^{2n}$ (or on its complexification) and prove that the normal forms of these actions are persistent under small perturbations. As a by-product, we prove an equivariant version of the Vey theorem (1978) about local symplectic normal form of nondegenerate singularities.
description: 69 pages, 2 tables, 1 figure
Spreading Dynamics of Polymer Nanodroplets in Cylindrical Geometries
Creators: name: Heine, David R.
name: Grest, Gary S.
name: Webb, Edmund B.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: The spreading of one- and two-component polymer nanodroplets is studied using molecular dynamics simulation in a cylindrical geometry. The droplets consist of polymer chains of length 10, 40, and 100 monomers per chain described by the bead-spring model spreading on a flat surface with a surface-coupled Langevin thermostat. Each droplet contains ~350,000 monomers. The dynamics of the individual components of each droplet are analyzed and compared to the dynamics of single component droplets for the spreading rates of the precursor foot and bulk croplet, the time evolution of the contact angle, and the velocity distribution inside the droplet. We derive spreading models for the cylindrical geometry analogous to the kinetic and hydrodynamic models previously developed for the spherical geometry and show that hydrodynamic behavior is observed at earlier times for the cylindrical geometry. The contact radius is predicted to scale like r(t) t^1/5 from the kinetic model and r(t) t^1/7 for the hydrodynamic model in the cylindrical geometry.
description: 26 pages 14 figures Physical Review E
Cross-Cultural Programs at Eastern Mennonite University: A Counter-Narrative to Study Abroad
Creators: name: Anderson, Kelsey Leigh
Publisher: name: ProQuest
Year: 2023
Subjects: classificationCode: 39
subject: Education
classificationCode: 3904
subject: Specialist studies in education

description: Eastern Mennonite University has implemented, as part of its general education curriculum, a required undergraduate cross-cultural experience since 1982. This study explores the case of this private, liberal arts university by inquiring into the connection between the cross- cultural program and Mennonite history and identity, and then situating these connections in the broader field of international education. Through archival research and twelve interviews and subsequent data analysis, the study found that core Mennonite values of service, community, and social justice and peacebuilding heavily influenced the cross-cultural program, as well as its structure, participation, and the content of each individual program. Based on the data analysis, the study concludes that EMU offers a counter-narrative to the ways in which study abroad is practiced at other universities, and that the Mennonite case acts as a call to other institutions to assess the values and motivations of their study abroad programming.
Cross-Cultural Programs at Eastern Mennonite University: A Counter-Narrative to Study Abroad
Creators: name: Anderson, Kelsey Leigh
Publisher: name: American University
Year: 2023

description: Eastern Mennonite University has implemented, as part of its general education curriculum, a required undergraduate cross-cultural experience since 1982. This study explores the case of this private, liberal arts university by inquiring into the connection between the cross- cultural program and Mennonite history and identity, and then situating these connections in the broader field of international education. Through archival research and twelve interviews and subsequent data analysis, the study found that core Mennonite values of service, community, and social justice and peacebuilding heavily influenced the cross-cultural program, as well as its structure, participation, and the content of each individual program. Based on the data analysis, the study concludes that EMU offers a counter-narrative to the ways in which study abroad is practiced at other universities, and that the Mennonite case acts as a call to other institutions to assess the values and motivations of their study abroad programming.
TIHM for Delirium
Creators: name: Jenkinson, Josie
Publisher: name: Zenodo
Year: 2022
Subjects: Dementia
Delirium

description: Delirium is a common disorder, described as confusion of sudden onset, that fluctuates, and is often accompanied by other distressing symptoms such as hallucinations. It has many causes and is more common in people with dementia. Delirium is a serious condition that has been associated with increased mortality. People with dementia are more at risk of developing delirium. Surrey and Borders Partnership NHS Foundation Trust have developed a system to support people with dementia to stay independent in their homes. This system is called ‘TIHM’ (Technology Integrated Healthcare Management), it is currently being successfully used as part of a monitoring service in Surrey, which aims to support people at home, facilitate access to care and prevent hospital admissions. We would like to explore how well this service works in providing support to people with dementia who also have delirium, who are being discharged from hospital. People with dementia currently experiencing delirium at Ashford and St Peter’s Hospitals, who are well enough to go home with support and have a potential study partner who lives with them will be eligible for this study. Equipment will be set up at home and connected with the monitoring service. The study will last for three months. We will complete a brief test at the start which asks questions to detect presence of delirium. We will repeat this at six weeks and at the end of the study. At the end of the study, we will complete a questionnaire looking at use of health and social care services during the study period and conduct an interview with the person with dementia and their study partner about their experiences. We will also conduct focus groups with the staff working in the TIHM monitoring service and local stakeholders to explore how well the service has worked.
Effect of the nitrate group on yields and composition of secondary organic aerosol formed from reactions of alkyl nitrates with OH radicals in the presence of NOx
Creators: name: Algrim, Lucas B.
name: Ziemann, Paul J.
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Biochemistry
subject: Neuroscience
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences

description: A systematic study was conducted on the effect of a nitrate functional group on secondary organic aerosol (SOA) products and yields from reactions of C10 alkyl nitrate isomers with OH radicals in the presence of NOx. The 1- through 5-decyl nitrate isomers were synthesized from their corresponding alcohols, reacted in an environmental chamber, and the precursors and SOA were analyzed using online and offline techniques. SOA products were analogous to those formed from similar reactions of the C10 n-alkane (decane), but with an additional nitrate group. The SOA yield was highest when the nitrate group was on the terminal carbon and decreased monotonically from 0.51 to 0.50, 0.44, 0.28, and 0.15 as it moved toward the center of the molecule, at which point it was similar to that from decane. The explanation for this trend, which is supported by results of calculations performed using a kinetics model, involves a combination of the effects of the nitrate group on product vapor pressures and reaction branching ratios. In general, although the nitrate group lowers the vapor pressures of products relative to the corresponding products of the decane reaction, thus enhancing gas-to-particle partitioning and SOA formation, as it moves toward the center of the molecule it also alters the branching ratios for reaction pathways so as to enhance the formation of more volatile products. The results are compared with those from similar studies on ketone and alcohol isomers to gain a more comprehensive understanding of the effects of functional groups on SOA composition and yields. Copyright © 2020 American Association for Aerosol Research
Cryptachaea riparia
Creators: name: Isaia, Marco
name: Paschetta, Mauro
name: Chiarle, Alberto
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Theridiidae
Cryptachaea
Cryptachaea riparia

description: Cryptachaea riparia (Blackwall, 1834)
NEW DATA. — Entracque: Tetti Violin, banks of a small stream with bushes, 900-1100 m, 10.VI.2011, 1♀ (collected within the PIT Summer School 2011).
CHOROTYPE. — PAL.
MACROHABITAT. — Riparian habitats.
NOTES. — New record for the study area.
description: Published as part of Isaia, Marco, Paschetta, Mauro & Chiarle, Alberto, 2015, Annotated checklist of the spiders (Arachnida, Araneae) of the Site of Community Importance and Special Area of Conservation " Alpi Marittime " (NW Italy), pp. 57-114 in Zoosystema 37 (1) on page 64, DOI: 10.5252/z2015n1a4, http://zenodo.org/record/4577680
Two-Loop Bethe Logarithms
Creators: name: Pachucki, Krzysztof
name: Jentschura, Ulrich D.
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We calculate the two-loop Bethe logarithm correction to atomic energy levels in hydrogen-like systems. The two-loop Bethe logarithm is a low-energy quantum electrodynamic (QED) effect involving multiple summations over virtual excited atomic states. Although much smaller in absolute magnitude than the well-known one-loop Bethe logarithm, the two-loop analog is quite significant when compared to the current experimental accuracy of the 1S-2S transition: it contributes -8.19 and -0.84 kHz for the 1S and the 2S state, respectively. The two-loop Bethe logarithm has been the largest unknown correction to the hydrogen Lamb shift to date. Together with the ongoing measurement of the proton charge radius at the Paul Scherrer Institute its calculation will bring theoretical and experimental accuracy for the Lamb shift in atomic hydrogen to the level of 10^(-7).
description: 4 pages, RevTeX
Hall-magnetohydrodynamic waves in flowing ideal incompressible solar-wind plasmas: Reconsidered
Creators: name: Zhelyazkov, I.
name: Dimitrov, Z.
name: Bogdanova, M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Plasma Physics (physics.plasm-ph)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: It is well established that the magnetically structured solar atmosphere supports the propagation of MHD waves along various kind of jets including also the solar wind. It is well-known as well that under some conditions, namely high enough jet speeds, the propagating MHD modes can become unstable against to the most common Kelvin--Helmholtz instability (KHI). In this article, we explore how the propagation and instability characteristics of running along a slow solar wind MHD modes are affected when they are investigated in the framework of the ideal Hall-magnetohydrodynamics. Hall-MHD is applicable if the jet width is shorter than or comparable to the so called Hall parameter $l_\mathrm{Hall} = c/ω_\mathrm{pi}$ (where $c$ is the speed of light and $ω_\mathrm{pi}$ is the ion plasma frequency). We model the solar wind as a moving with velocity $\vec{v}_0$ cylindrical flux tube of radius $a$, containing incompressible plasma with density $ρ_\mathrm{i}$ permeated by a constant magnetic field $\vec{B}_\mathrm{i}$. The surrounding plasma is characterized with its density $ρ_\mathrm{e}$ and magnetic field $\vec{B}_\mathrm{e}$. The dispersion relation of MHD waves is derived in the framework of both standard and Hall-MHD and is numerically solved with input parameters: the density contrast $η= ρ_\mathrm{e}/ρ_\mathrm{i}$, the magnetic fields ratio $b = {B}_\mathrm{e}/{B}_\mathrm{i}$, and the Hall scale parameter $l_\mathrm{Hall}/a$. It is found that the Hall current, at moderate values of $l_\mathrm{Hall}/a$, stimulates the emerging of KHI of the kink ($m = 1)$ and high-mode ($m \geqslant 2$) MHD waves, while for the sausage wave ($m = 0$) the trend is just the opposite---the KHI is suppressed.
description: 16 pages, 10 figures
Zur Struktur und Entstehung von Eiskeil–Grossformen in Lieth/Elmshorn (Schleswig-Holstein)
Creators: name: Grube, Alf
Publisher: name: Geozon Science Media
Year: 2007

description: Die oberflächennahen Ablagerungen des Perm und Quartär im Westteil der Liether Kalkgrube sind intensiv periglaziär überprägt. Drei annähernd parallel verlaufende, bis zu mehr als 3 m tiefe und 0,5 m breite Eiskeil-Pseudomorphosen sind aufgrund der Ausbildung in den Zechstein-Aschen und -Kalken, der ungewöhnlichen Größe und der Vergesellschaftung mehrerer ähnlich großer Strukturen von besonderer Bedeutung. Ihre Entstehung lässt sich mit den spezifischen Standortfaktoren erklären. Eine feinkörnige Beschaffenheit des Wirtsgesteines bot gute Voraussetzungen für eine intensivere Frostwirkung, ebenso wie die Exposition der Zechstein-Aschen mit geringer Quartärbedeckung. Eine ungewöhnlich große mechanische Festigkeit der Zechstein-Aschen im Vergleich zu typischen norddeutschen Lockergesteinen begünstigte die Entstehung größerer Strukturen. Die Vergesellschaftung, die ähnliche Dimensionierung und ähnliche Orientierung der drei großen Eiskeile deuten auf einen Zusammenhang mit einer salinartektonischen Vorzeichnung hin. Die sedimentologisch-tektonische Struktur der halokinetisch überformten Zechstein-Ablagerungen bestimmte die äußere Geometrie der Eiskeile maßgeblich mit. Bei der Füllung hinsichtlich Struktur, Mächtigkeit der einzelnen Füllungsabschnitte, Bodenart und -farbe deuten sich zwei unterschiedliche Bildungsphasen an. Offenbar erfolgte bei zwei Strukturen eine randliche, einseitige Öffnung und Verfüllung. Die Strukturen stellen möglicherweise prä-weichselkaltzeitliche Bildungen dar.
description: research
AFRO-COLOMBIAN AND INDIGENOUS SOCIAL MOVMEMENTS: INTERNATIONAL INFLUENCES, FRAMING TACTICS, AND STATE CONSTRUCTED IDENTITY
Creators: name: Terrell, Stacy
Publisher: name: American University
Year: 2023

description: This thesis is a comparative analysis of Afro-Colombian and Indigenous social movements. It examines the intersection between political opportunity structure, international network influence, movement framing and identity construction. It also examines the ways in which indigenous and Afro-Colombian identities have been historically constructed by the state and subsequently contested by social movement actors. I argue that indigenous social movement success was possible due to the political opportunity structure of the Colombian National Constituent Assembly, supportive international networks, and effective framing tactics. Meanwhile Afro-Colombian groups did not have access to the National Constituent Assembly, did not have access to supportive international networks and framed their movement in a way which did not resonate with the majority of the Afro-Colombian population.
Vegetationsgeschichtliche Untersuchungen an cromer-zeitlichen Ablagerungen im nördlichen Randgebiet der deutschen Mittelgebirge.
Creators: name: Grüger, Eberhard
Publisher: name: Geozon Science Media
Year: 1967

description: Es wurden interglaziale Ablagerungen auf dem Elm bei Braunschweig und im Osterholz bei Elze — beide im Bereich der Mittelgebirge — pollenanalytisch untersucht. In beiden Fällen sind eine Kiefern-Birkenzeit und eine EMW-Zeit erfaßt. Die Vegetationsentwicklung der Kiefern-Birkenzeit ist jeweils durch das frühe Auftreten von Picea gekennzeichnet. Starke lokale Einflüsse im Osterholz erschweren einen näheren Vergleich. Die Entwicklung der Vegetation während der EMW-Zeit ist aber an beiden Orten ähnlich verlaufen und zeichnet sich insbesondere dadurch aus, daß die Ulme deutlich vor der Eiche einwanderte und während der ganzen EMW-Zeit hohe Anteile aufweist. Weiterhin haben beide Vorkommen sehr niedrige Haselwerte gemeinsam. Das Interglazial vom Osterholz enthält darüberhinaus noch eine Hainbuchen-Eichenmischwald-Fichtenzeit, in deren jüngstem Teil Eucommia relativ hohe Werte erreicht, und in der auch Azolla filiculoides nachgewiesen werden konnte. Die Ähnlichkeit der Vegetationsentwicklung rechtfertigt die Annahme einer Gleichaltrigkeit beider Vorkommen. Wie ein Vergleich der Vegetationsentwicklung vom Elm und vom Osterholz mit denen der Eem-, der Holstein-, der Waal- und der Tegelenwarmzeit sowie denjenigen sämtlicher bisher untersuchten cromerzeitlichen Vorkommen zeigt, ist nur eine Einordnung in den Cromer-Komplex möglich. Diese Datierung wird durch die geologischen Verhältnisse im Osterholz gestützt (Elster-Moräne im Hangenden). Demzufolge verdient das nordische Material im Liegenden des Interglazials vom Elm besonderes Interesse. Ein Vergleich der Vegetationsentwicklung vom Osterholz mit der des „Rhume"-Interglazials von Bilshausen (Entfernung Osterholz—Bilshausen nur ca. 60 km), welches ebenfalls in den Cromer-Komplex gestellt werden muß, zeigt, daß diese Vorkommen keinesfalls gleichaltrig sein können. Das spricht sehr deutlich dafür, daß der Cromer-Komplex mindestens zwei Warmzeiten enthält. Weitere Aussagen über die relative Altersstellung dieser beiden Vorkommen und die Stellung der anderen cromerzeitlichen Vorkommen zu ihnen sind aber vorerst nicht möglich.
description: research
Correlation Energy of a Weakly Interacting Fermi Gas
Creators: name: Benedikter, Niels
name: Nam, Phan Thành
name: Porta, Marcello
name: Schlein, Benjamin
name: Seiringer, Robert
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mathematical Physics (math-ph)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences
subject: 81V70, 82B10, 81Q10, 35P05

description: We derive rigorously the leading order of the correlation energy of a Fermi gas in a scaling regime of high density and weak interaction. The result verifies the prediction of the random-phase approximation. Our proof refines the method of collective bosonization in three dimensions. We approximately diagonalize an effective Hamiltonian describing approximately bosonic collective excitations around the Hartree-Fock state, while showing that gapless and non-collective excitations have only a negligible effect on the ground state energy.
description: 69 pages, 2 figures; v2: additional references on lattice point counting; v3: expanded introduction and list of references
AFRO-COLOMBIAN AND INDIGENOUS SOCIAL MOVMEMENTS: INTERNATIONAL INFLUENCES, FRAMING TACTICS, AND STATE CONSTRUCTED IDENTITY
Creators: name: Terrell, Stacy
Publisher: name: ProQuest
Year: 2023
Subjects: classificationCode: 44
subject: Human society

description: This thesis is a comparative analysis of Afro-Colombian and Indigenous social movements. It examines the intersection between political opportunity structure, international network influence, movement framing and identity construction. It also examines the ways in which indigenous and Afro-Colombian identities have been historically constructed by the state and subsequently contested by social movement actors. I argue that indigenous social movement success was possible due to the political opportunity structure of the Colombian National Constituent Assembly, supportive international networks, and effective framing tactics. Meanwhile Afro-Colombian groups did not have access to the National Constituent Assembly, did not have access to supportive international networks and framed their movement in a way which did not resonate with the majority of the Afro-Colombian population.
How the Intersection of Race/Ethnicity with Gender Affects Stress and Burden on Caregivers Who Provide Care for the Elderly
Creators: name: Wattai, Courtney Ann
Publisher: name: ProQuest
Year: 2023
Subjects: classificationCode: 4410
subject: Sociology
subject: FOS: Sociology

description: This study examined how the intersection of race/ethnicity with gender impacted the stress/burden experienced by elder caregivers. An intersectional framework was used to analyze how the social locations of 768 caregivers affected overall stress/burden. The data examined were from the 2003 "Caregivers in the U.S." data set distributed by the Roper Center. Through regression analyses, the findings suggest white women in this sample were the most emotionally stressed in their caregiving duties, while minority (African American, Hispanic, and Asian) men and women were most financially stressed. Minority women also seem to be slightly more burdened than other caregivers in one test. Surprisingly, children in the caregivers' households alleviated stress/burden for elder caregivers, indicating that caregivers who have multiple care responsibilities may not be more stressed/burdened than caregivers who care only for elders. Policymakers should give attention to differences among caregivers who experience various aspects of stress/burden so their caregiving needs can be adequately met in the future.
Complete flavor decomposition of the spin and momentum fraction of the proton using lattice QCD simulations at physical pion mass
Creators: name: Alexandrou, C.
name: Bacchio, S.
name: Constantinou, M.
name: Finkenrath, J.
name: Hadjiyiannakou, K.
name: Jansen, K.
name: Koutsou, G.
name: Panagopoulos, H.
name: Spanoudes, G.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We evaluate the gluon and quark contributions to the spin of the proton using an ensemble of gauge configuration generated at physical pion mass. We compute all valence and sea quark contributions to high accuracy. We perform a non-perturbative renormalization for both quark and gluon matrix elements. We find that the contribution of the up, down, strange and charm quarks to the proton intrinsic spin is $\frac{1}{2}\sum_{q=u,d,s,c}ΔΣ^{q^+}=0.191(15)$ and to the total spin $\sum_{q=u,d,s,c}J^{q^+}=0.285(45)$. The gluon contribution to the spin is $J^g=0.187(46)$ yielding $J=J^q+J^g=0.473(71)$ confirming the spin sum. The momentum fraction carried by quarks in the proton is found to be $0.618(60)$ and by gluons $0.427(92)$, the sum of which gives $1.045(118)$ confirming the momentum sum rule. All scale and scheme dependent quantities are given in the $\mathrm{ \overline{MS}}$ scheme at 2 GeV.
How the Intersection of Race/Ethnicity with Gender Affects Stress and Burden on Caregivers Who Provide Care for the Elderly
Creators: name: Wattai, Courtney Ann
Publisher: name: American University
Year: 2023

description: This study examined how the intersection of race/ethnicity with gender impacted the stress/burden experienced by elder caregivers. An intersectional framework was used to analyze how the social locations of 768 caregivers affected overall stress/burden. The data examined were from the 2003 "Caregivers in the U.S." data set distributed by the Roper Center. Through regression analyses, the findings suggest white women in this sample were the most emotionally stressed in their caregiving duties, while minority (African American, Hispanic, and Asian) men and women were most financially stressed. Minority women also seem to be slightly more burdened than other caregivers in one test. Surprisingly, children in the caregivers' households alleviated stress/burden for elder caregivers, indicating that caregivers who have multiple care responsibilities may not be more stressed/burdened than caregivers who care only for elders. Policymakers should give attention to differences among caregivers who experience various aspects of stress/burden so their caregiving needs can be adequately met in the future.
Neuere Eiszeithypothesen
Creators: name: Schwarzbach, Martin
Publisher: name: Geozon Science Media
Year: 1968

description: Die Hypothesen zur Erklärung der großen Klimaschwankungen müssen davon ausgehen, daß es lang-, mittel- und kurzfristige Schwankungen gibt; diese verhalten sich zeitlich ungefähr wie 100 000 : 100 : 1. Fast alle gelten nur für die letzten 600 Mill. Jahre, d. h. nur für 1/7 (oder noch weniger) der Erdgeschichte, da über das Klima des Präcambriums fast nichts bekannt ist. Ein Schema (Abb. 2) zeigt, welche Klimahypothesen möglich sind. Kritisch betrachtet werden folgende, seit 1961 neu konzipierte oder neu diskutierte Hypothesen: die von P. Jordan, J. Steiner, Strahlungskurven, die Autocyklen-Hypothesen von Tanner und A. T. Wilson (als Autocyklen-Hypothesen werden solche bezeichnet, die durch einen automatisch ablaufenden Mechanismus einen cyklischen Wechsel von Glazialen und Interglazialen erklären), die Koinzidenz-Hypothese von R. W. Fairbridge, kontinentale Drift, vulkanischer Staub. Keine Hypothese befriedigt vollständig. Nach dem heutigen Stand der Kenntnisse scheinen zahlreiche Ursachen zusammenzuwirken (wie das ähnlich auch schon andere angenommen haben); das wird als multilaterale Eiszeit-Entstehung bezeichnet. Dabei wird davon ausgegangen, daß das Gesamtklima der Erde seit dem späten Präcambrium nur geringe Schwankungen zeigte und erstaunlich konstant blieb (trotz großer lokaler Schwankungen in den höheren Mittelbreiten). Es ist möglich, daß der Wechsel von Glazialen und Interglazialen eine Besonderheit des Quartärs darstellt. Es erscheint auch denkbar, daß die Faktoren multilateraler Eiszeit-Entstehung kausal zusammenhängen, d. h. daß diese Hypothese eine provisorische Erklärung darstellt, die dem heutigen unvollkommenen Stand unserer Erkenntnisse entspricht und später vielleicht doch durch eine übergeordnete Eiszeithypothese ersetzt werden kann.
description: research
The Power of General Relativity
Creators: name: Clifton, Timothy
name: Barrow, John D.
Publisher: name: arXiv
Year: 2005
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the cosmological and weak-field properties of theories of gravity derived by extending general relativity by means of a Lagrangian proportional to $R^{1+δ}$. This scale-free extension reduces to general relativity when $δ\to 0$. In order to constrain generalisations of general relativity of this power class we analyse the behaviour of the perfect-fluid Friedmann universes and isolate the physically relevant models of zero curvature. A stable matter-dominated period of evolution requires $δ>0$ or $δ
description: 26 pages and 5 figures. Published version
Decay widths and energy shifts of pi pi and pi K atoms
Creators: name: Schweizer, J.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We calculate the S-wave decay widths and energy shifts for pi pi and pi K atoms in the framework of QCD+QED. The evaluation - valid at next-to-leading order in isospin symmetry breaking - is performed within a non-relativistic effective field theory. The results are of interest for future hadronic atom experiments.
description: Version to be published in Phys. Lett. B. Four references added, correlation matrix for pi K scattering lengths updated, uncertainty of Delta E^h_1 in table 2 adapted. 14 pages, 1 figure
Euryopis laeta
Creators: name: Isaia, Marco
name: Paschetta, Mauro
name: Chiarle, Alberto
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Theridiidae
Euryopis
Euryopis laeta

description: Euryopis laeta (Westring, 1861)
NEW DATA. — Valdieri: southern slope of Monte Bourel, Vallone della Meris, Sant’Anna di Valdieri, Alpine prairies with rocky debris, 1500-2300 m, 1-31.VIII.2011 (pitfall traps), 2♀.
CHOROTYPE. — EUR.
MACROHABITAT. — Alpine prairies.
NOTES. — New record for Piemonte.
description: Published as part of Isaia, Marco, Paschetta, Mauro & Chiarle, Alberto, 2015, Annotated checklist of the spiders (Arachnida, Araneae) of the Site of Community Importance and Special Area of Conservation " Alpi Marittime " (NW Italy), pp. 57-114 in Zoosystema 37 (1) on page 64, DOI: 10.5252/z2015n1a4, http://zenodo.org/record/4577680
title: The significance of antibody production in human renal transplantation
Creators: name: Harmer, Andrea Wendy
Publisher: name: The Open University
Year: 1998

description: Screening for HLA specific antibodies is an important part of laboratory testing for transplantation. The conventional technique for screening is complement dependent lymphocytotoxicity. The development and increasing use of the sensitive flow cytometric crossmatch technique has meant that this conventional screening method is often less sensitive than the final crossmatch. The aim of this study was the development of a flow cytometric screening technique which would be as sensitive as the flow cytometric crossmatch and the investigation of the newly developed ELISA screening method PRA-STAT. These methods were used to investigate antibody production in patients with failed transplants. Flow cytometric analysis of antibody binding to pooled cells was found to be a reliable and sensitive method for the detection of HLA class I and class II specific antibodies. PRA-STAT also detects both class I and class II specific antibodies. Both flow cytometric and PRA-STAT screening methods were shown to be more sensitive than conventional cytotoxic screening. Screening of patients with failed transplants by these sensitive methods showed that the majority of patients produce both HLA class I and class II donor specific antibodies following failure of a primary transplant. Flow cytometric and PRA-STAT screening detected antibody production earlier than cytotoxic screening in some patients. HLA matching was shown to be related to both graft survival and to the levels of antibody produced following graft failure with poorly matched grafts resulting in higher levels of sensitisation than well matched grafts. Patients with detectable post graft failure antibodies had a lower chance of receiving a second transplant and had significantly worse regraft survival than patients with no antibody. The results of the study suggest that HLA class II specific antibodies and repeat class II mismatches may be detrimental in regrafts and this requires further study.
High Speed Source Localization in Searches for Gravitational Waves from Compact Object Collisions
Creators: name: Tsutsui, Takuya
name: Cannon, Kipp
name: Tsukada, Leo
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Multi-messenger astronomy is of great interest. The localization speed of gravitational wave sources is important for the success of electromagnetic follow-up. Although current gravitational wave source localization methods take up to a few seconds, even that is not sufficient for some electromagnetic bands. Therefore, one needs a more rapid localization method even if it is less accurate. Building upon an Excess power method, we describe a new localization method for compact object collisions that produces posterior probability maps in only a few hundred milliseconds. Some accuracy is lost, with the searched sky areas being approximately $10$ times larger. We imagine this new technique playing a role in a hierarchical scheme where fast early location estimates are iteratively improved upon as better analyses complete on longer time scales.
description: prd version