cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Axion as a cold dark matter candidate: Analysis to third order perturbation for classical axion
Creators: name: Noh, Hyerim
name: Hwang, Jai-chan
name: Park, Chan-Gyung
Publisher: name: arXiv
Year: 2015
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We investigate aspects of axion as a coherently oscillating massive classical scalar field by analyzing third order perturbations in Einstein's gravity in the axion-comoving gauge. The axion fluid has its characteristic pressure term leading to an axion Jeans scale which is cosmologically negligible for a canonical axion mass. Our classically derived axion pressure term in Einstein's gravity is identical to the one derived in the non-relativistic quantum mechanical context in the literature. We show that except for the axion pressure term, the axion fluid equations are exactly the same as the general relativistic continuity and Euler equations of a zero-pressure fluid up to third order perturbation. The general relativistic density and velocity perturbations of the CDM in the CDM-comoving gauge are exactly the same as the Newtonian perturbations to the second order (in all scales), and the pure general relativistic corrections appearing from the third order are numerically negligible (in all scales as well) in the current paradigm of concordance cosmology. Therefore, here we prove that, in the super-Jeans scale, the classical axion can be handled as the Newtonian CDM fluid up to third order perturbation. We also show that the axion fluid supports the vector-type (rotational) perturbation from the third order. Our analysis includes the cosmological constant.
description: 16 pages, no figures
Observational Signatures of Waves and Flows in the Solar Corona
Creators: name: De Moortel, Ineke
name: Antolin, Patrick
name: Van Doorsselaere, Tom
Publisher: name: arXiv
Year: 2015
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Propagating perturbations have been observed in extended coronal loop structures for a number of years, but the interpretation in terms of slow (propagating) magneto-acoustic waves and/or as quasi-periodic upflows remains unresolved. We used forward-modelling to construct observational signatures associated with a simple slow magneto-acoustic wave or periodic flow model. Observational signatures were computed for the 171 Å Fe ix and the 193 Å Fe xii spectral lines. Although there are many differences between the flow and wave models, we did not find any clear, robust observational characteristics that can be used in isolation ( i.e. that do not rely on a comparison between the models). For the waves model, a relatively rapid change of the average line widths as a function of (shallow) line-of-sight angles was found, whereas the ratio of the line width amplitudes to the Doppler velocity amplitudes is relatively high for the flow model. The most robust observational signature found is that the ratio of the mean to the amplitudes of the Doppler velocity is always higher than one for the flow model. This ratio is substantially higher for flows than for waves, and for the flows model used in the study is exactly the same in the 171 Å Fe ix and the 193 Å Fe xii spectral lines. However, these potential observational signatures need to be treated cautiously because they are likely to be model-dependent.
PKS 1502+106: A high-redshift Fermi blazar at extreme angular resolution. Structural dynamics with VLBI imaging up to 86 GHz
Creators: name: Karamanavis, V.
name: Fuhrmann, L.
name: Krichbaum, T. P.
name: Angelakis, E.
name: Hodgson, J.
name: Nestoras, I.
name: Myserlis, I.
name: Zensus, J. A.
name: Sievers, A.
name: Ciprini, S.
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Context. Blazars are among the most energetic objects in the Universe. In 2008 August, Fermi/LAT detected the blazar PKS 1502+106 showing a rapid and strong gamma-ray outburst followed by high and variable flux over the next months. This activity at high energies triggered an intensive multi-wavelength campaign covering also the radio, optical, UV, and X-ray bands indicating that the flare was accompanied by a simultaneous outburst at optical/UV/X-rays and a delayed outburst at radio bands. Aims: In the current work we explore the phenomenology and physical conditions within the ultra-relativistic jet of the gamma-ray blazar PKS 1502+106. Additionally, we address the question of the spatial localization of the MeV/GeV-emitting region of the source. Methods: We utilize ultra-high angular resolution mm-VLBI observations at 43 and 86 GHz complemented by VLBI observations at 15 GHz. We also employ single-dish radio data from the F-GAMMA program at frequencies matching the VLBI monitoring. Results: PKS 1502+106 shows a compact core-jet morphology and fast superluminal motion with apparent speeds in the range 5--22 c. Estimation of Doppler factors along the jet yield values between ~7 up to ~50. This Doppler factor gradient implies an accelerating jet. The viewing angle towards the source differs between the inner and outer jet, with the former at ~3 degrees and the latter at ~1 degree, after the jet bends towards the observer beyond 1 mas. The de-projected opening angle of the ultra-fast, magnetically-dominated jet is found to be (3.8 +/- 0.5) degrees. A single jet component can be associated with the pronounced flare both at high-energies and in radio bands. Finally, the gamma-ray emission region is localized at less than 5.9 pc away from the jet base.
description: 22 pages, 12 figures. Accepted for publication in A&A
From machines to screens: the flattening effect in Christian Kracht’s "Faserland"
Creators: name: Mag, Tobias
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2007

description: In this thesis, I argue that Christian Kracht’s novel Faserland is a paradigmatic representation of the quandary of postmodernity facing Germany. I discuss the transition from modernity to postmodernity as it is manifested in this novel as a flattening or homogenization of the vertically-oriented, individuating concept of a Marcusean critical modernity. The transition is marked by a semiotic paradigm shift from the Marcusean construct of the Machine to what I refer to as the “Blue-Screen.” The central problem underlying this change is how Germany as a society is to adapt to postmodernity and its eradication of identity and individuality. While the behavior of the novel’s protagonist offers a potential coping mechanism in line with Félix Guattari’s concept of “Machinic Doping,” it is a solution that Germany is unable to utilize, as the postmodern implication of severing ties to the past is something that the nation cannot accept.
Ultraschnelle zeitaufgelöste Pump/Probe-Photoelektronenspektroskopie an isolierten und massenselektierten Anionen
Creators: name: Ehrler, Oli T.
Publisher: name: Universitätsverlag Karlsruhe
Year: 2006
Subjects: Zeitauflösung
Photoelektronenspektroskopie
Dynamik
Gasphase
Ab-initio-Rechnung
Fulleren
Dianion
Phthalocyanin

description: In der vorliegenden Arbeit wird die Anregungs/Abfrage-Photoelektronenspektroskopie auf die Untersuchung elektronischer Dynamik in massenselektierten Molekülionen unter Hochvakuum-Bedingungen angewendet, wodurch die Beobachtung intramolekularer elektronischer Relaxation unter Ausschluss jeglicher Wechselwirkung der untersuchten Teilchen zur umgebenden Matrix möglich ist.
Weak measurement amplification in optomechanics via a squeezed coherent state pointer
Creators: name: Li, Gang
name: Chen, Li-Bo
name: Lin, Xiu-Min
name: Song, He-Shan
Publisher: name: arXiv
Year: 2015
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present a scheme for achieving amplification of the displacement of the mirror in optomechanical cavity using single-photon postselection where the mirror is initially prepared in squeezed coherent state. The amplification depends on the enhanced fluctuations of the squeezed coherent state, and it is is caused by the noncommutativity of quantum mechanics relying on the squeezed coherent state, which can not be explained by the standard weak measurement [1,25].
description: arXiv admin note: substantial text overlap with arXiv:1509.00621
Vulnerability Analysis of Web Push Implementations in the Wild
Creators: name: Carboneri, Alberto
Publisher: name: University of Illinois at Chicago
Year: 2023

description: Web push is a novel technology, supported by all major browsers, which has gained significant traction in the developer community thanks to its ability to engage users efficiently and anonymously. However, security researchers have yet to properly investigate the possible threats arising from its improper use. In this thesis, we explore the capabilities and features of web push, report common usage patterns found in the wild, including an analysis of the inner working of most third-party providers, and present a security analysis of such implementations. We demonstrate a novel history-sniffing attack abusing a common implementation mistake, and a dangerous use case of the well-known CSRF vulnerability. We conduct and show the results of the first large-scale measurement aimed at identifying the prevalence of this technology and the related vulnerabilities on the web. The result of this measurement is also used to quantify the presence of a common negative pattern where websites aggressively ask the user for permission to use web push. Furthermore, we analyze the complexity of efficiently and correctly implementing personalized web push notifications and we report design issues we found on Twitter. We propose a theoretical system that corrects those mistakes and better handles all scenarios. Finally, we present some straightforward countermeasures and good practices to effectively fix the reported vulnerabilities and make the technology safer. Overall this work is intended to remark on the dangers of developing and implementing new technology without considering the security implications and to shine a light on some of the vulnerabilities present in implementations in the wild, possibly leading to a greater interest of the security community and further research on this and related subjects.
Photometric Solutions of Some Contact ASAS Binaries
Creators: name: Gezer, I.
name: Bozkurt, Z.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present the first light curve solution of 6 contact binary systems which are chosen from the ASAS catalog. The photometric elements and the estimated absolute parameters of all systems are obtained with the light curve analyses. We calculated the values of degree of contact for the systems. The location of the targets on the Hertzsprung-Russell diagram and the mass-radius plane is compared to the other well-known contact binaries and the evolutionary status of the systems are also discussed.
description: Accepted for publication in New Astronomy. 16 pages, 8 figures, 4 tables
Photo-dynamical mass determination of the multi-planetary system K2-19
Creators: name: Barros, S. C. C.
name: Almenara, J. M.
name: Demangeon, O.
name: Tsantaki, M.
name: Santerne, A.
name: Armstrong, D. J.
name: Barrado, D.
name: Brown, D.
name: Deleuil, M.
name: Lillo-Box, J.
name: Osborn, H.
name: Pollacco, D.
name: Abe, L.
name: Andre, P.
name: Bendjoya, P.
name: Boisse, I.
name: Bonomo, A. S.
name: Bouchy, F.
name: Bruno, G.
name: Cerda, J. Rey
name: Courcol, B.
name: Díaz, R. F.
name: Hébrard, G.
name: Kirk, J.
name: Lachurié, J. C.
name: Lam, K. W. F.
name: Martinez, P.
name: McCormac, J.
name: Moutou, C.
name: Rajpurohit, A.
name: Rivet, J. -P.
name: Spake, J.
name: Suarez, O.
name: Toublanc, D.
name: Walker, S. R.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: K2-19 is the second multi-planetary system discovered with K2 observations. The system is composed of two Neptune size planets close to the 3:2 mean-motion resonance. To better characterise the system we obtained two additional transit observations of K2-19b and five additional radial velocity observations. These were combined with K2 data and fitted simultaneously with the system dynamics (photo-dynamical model) which increases the precision of the transit time measurements. The higher transit time precision allows us to detect the chopping signal of the dynamic interaction of the planets that in turn permits to uniquely characterise the system. Although the reflex motion of the star was not detected, dynamic modelling of the system allowed us to derive planetary masses of $M_b= 44 \pm 12\, M_{\oplus}$ and $M_c = 15.9 \pm 7.0\, M_{\oplus}$ for the inner and the outer planets respectively, leading to densities close to Uranus. We also show that our method allows the derivation of mass ratios using only the 80 days of observations during the first campaign of K2.
description: 10 pages, 7 figures, 2 tables, MNRAS accepted
Thermochemistry and Kinetics for the Oxidative Degradation of Dibenzofuran and Precursors
Creators: name: Sebbar, Nadia
Publisher: name: Universitätsverlag Karlsruhe
Year: 2006
Subjects: Dioxin
Dibenzofuran
Thermochemistry
DFT
ab initio
Groupe additivity
Isodesmic reactions
Kinetics
Transition state theory
QRRK

description: The emission of dibenzofurans and dioxins from industrial processes is a major environmental concern. Focussing on dibenzofuran, this study tend to improve our understanding of the general oxidation chemistry and to provide a mechanism suitable for future modelling studies. Based on quantum chemical methods, energies, chemical structures and reactions are calculated numerically. Not only stable molecules and radicals, but also transition states are reported in this work.
Morphosyntactic doubling in code switching
Creators: name: Hicks, Caleb Crandall
Publisher: name: University of North Carolina at Chapel Hill
Year: 2010

description: When code switching occurs between languages which are typologically opposed, the resulting utterance sometimes obeys the typological patterns dictated by both languages. If one contributor language has a basic word order of SVO, and the other has SOV, the code switched sentence may have the surface order SVOV; in effect, producing a doubled morphosyntactic element, where each double is realized in a different source language. In this thesis, I examine code switches which furnish doubled verbs, auxiliaries, adpositions, coordinations, complementizers, and morphological affixes from a large variety of language pairs. I argue that previous accounts of such doubles are unsatisfactory, as is the application of syntactic approaches to monolingual doubling. I contend that a framework favoring simultaneous access of multiple languages gives a more promising account of code switched doubles.
Temporal discounting does not influence Body Mass Index
Creators: name: Veillard, Megan
name: Vincent, Benjamin
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: body mass index
subject: delay discounting
subject: inter-temporal choice
subject: meta-analysis
subject: obesity
subject: temporal discounting
subject: underweight

description: The prevalence of obesity has driven searches for cognitive or behavioural economic factors related to Body Mass Index (BMI). One compelling candidate is delay discounting: those who prefer smaller sooner rewards over larger but later rewards are hypothesised to have higher BMI. The findings in the literature are mixed however, with meta analyses suggesting only a very small correlation between discounting and BMI. Here we present novel empirical data (N=381) and Bayesian analyses which suggest no such relationship between discounting of either monetary or weight loss rewards and BMI. We also find evidence against our novel proposal that discounting moderates the rate of BMI gain over time. We also present our data in the context of a random effects Bayesian meta-analytical result which does suggest the presence of a small correlation overall. The strength of the correlation is so weak (2.25% shared variance) that its practical significance may be minor to non existent. However because we found decisive evidence for unaccounted for study-level variance, due to study heterogeneity, we argue that we should treat such meta-analytic correlations with extreme caution. While the relationship between discounting and health outcomes such as BMI remain theoretically appealing, our empirical and meta-analytic results suggest we should be cautious in inferring a correlational, let alone a causal, role for discounting processes in driving BMI or moderating BMI gain with age.
The spine and scapula stabilizing (S3) brace has an effect on posture and muscle activity in overhead athletes with poor posture
Creators: name: Cole, Ashley Kahlil
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2008

description: The purpose of this study was to determine whether or not the S3 scapular stabilizing brace corrects the posture of participants with FHRSP. In addition, this study determined whether or not wearing the S3 scapular stabilizing brace has an effect on the muscle activity of participants with FHRSP while performing six scapular stabilization exercises. Posture was measured using a digital camera and Adobe Photoshop to determine both the forward head and rounded shoulder angles. Muscle activity was measure for the upper trapezius, middle trapezius, lower trapezius, and serratus anterior using the average EMG recorded during Y', T's, W's, shoulder extension, forward flexion, and scapular punches. This study found that there were significant changes in FSA and upper, middle, and lower trapezii EMG activity caused when wearing the S3 brace compared to not wearing it. However, this study did not find significant differences in the treatment group compared to the sham group for FHRSP or EMG activity in any muscles.
Take them for a ride: an online relationship management plan for MotoGP
Creators: name: Semprini, Luca
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2010

description: MotoGP - the premier form of on-track motorcycle racing - attracts millions of fans worldwide but remains a niche product in the competitive American sports market. This project highlights the connections between public relations, marketing, and interactive technologies, building on the diffusion of Internet and social network sites to increase the sport's popularity among the U.S. public. The project begins by giving an overview of MotoGP's structure and operations. Then, literature on relationship management in PR and Marketing, interactivity, and social network sites is reviewed to set the foundations for a promotional campaign. Finally, the project offers strategic communication solutions for MotoGP to grow and foster mutually beneficial relationships with its fan base in the United States.
On the scattering of gluons in the GKP string
Creators: name: Bianchi, Lorenzo
name: Bianchi, Marco S.
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We compute the one-loop S-matrix for the light bosonic excitations of the GKP string at strong coupling. These correspond, on the gauge theory side, to gluon insertions in the GKP vacuum. We perform the calculation by Feynman diagrams in the worldsheet theory and we compare the result to the integrability prediction, finding perfect agreement for the scheme independent part. For scheme dependent rational terms we test different schemes and find that a recent proposal reproduces exactly the integrability prediction.
description: 50 pages, 8 tables, 13 figures
Learning about End-User Development for Smart Homes by "Eating Our Own Dog Food"
Creators: name: Coutaz, Joelle
name: Crowley, James L.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences

description: SPOK is an End-User Development Environment that permits people to monitor, control, and configure smart home services and devices. SPOK has been deployed for more than 4 months in the homes of 5 project team members for testing and refinement, prior to longitudinal experiments in the homes of families not involved in the project. This article reports on the lessons learned in this initial deployment.
Resource Management for OFDMA based Next Generation 802.11ax WLANs
Creators: name: Karaca, Mehmet
name: Bastani, Saeed
name: Priyanto, Basuki Endah
name: Safavi, Mohammadhassan
name: Landfeldt, Björn
Publisher: name: arXiv
Year: 2016
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: Information Theory (cs.IT)
subject: Performance (cs.PF)
subject: FOS: Computer and information sciences

description: Recently, IEEE 802.11ax Task Group has adapted OFDMA as a new technique for enabling multi-user transmission. It has been also decided that the scheduling duration should be same for all the users in a multi-user OFDMA so that the transmission of the users should end at the same time. In order to realize that condition, the users with insufficient data should transmit null data (i.e. padding) to fill the duration. While this scheme offers strong features such as resilience to Overlapping Basic Service Set (OBSS) interference and ease of synchronization, it also poses major side issues of degraded throughput performance and waste of devices' energy. In this work, for OFDMA based 802.11 WLANs we first propose practical algorithm in which the scheduling duration is fixed and does not change from time to time. In the second algorithm the scheduling duration is dynamically determined in a resource allocation framework by taking into account the padding overhead, airtime fairness and energy consumption of the users. We analytically investigate our resource allocation problems through Lyapunov optimization techniques and show that our algorithms are arbitrarily close to the optimal performance at the price of reduced convergence rate. We also calculate the overhead of our algorithms in a realistic set-up and propose solutions for the implementation issues.
description: accepted to Wireless and Mobile Networking Conference (WMNC), 2016 9th IFIP
High Resolution Stratigraphy of the Lower Silurian (Rhuddanian-Aeronian) Paleotropical Neritic Carbonates, Anticosti Island, Québec
Creators: name: Daoust, Pascale
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2017
Subjects: Stratigraphy
Carbonates
Chemostratigraphy
Cyclostratigraphy
Ordovician-Silurian boundary

description: Anticosti Island, located in Eastern Canada, displays one of the most complete, best exposed, and most fossiliferous carbonate successions spanning the Ordovician-Silurian (O/S) Boundary in the World. This study develops a new high-resolution framework for the post End-Ordovician extinction strata (~ 260 m thick) exposed in coastal outcrops and recovered from a continuous drill core (La Loutre #1), both located in the western part of the island. In total, eight facies, all associated with a storm-dominated carbonate system, were recognized and organized into a multi-order depositional cycles. A new high resolution isotopic curve with more than 300 data points from well-preserved bulk micrite samples covers the late Hirnantian to Early Aeronian time interval and corresponds to the upper Ellis Bay, Becscie, Merrimack and lower Gun River formations. Two distinct positive carbon isotope excursions are present in the late Hirnantian part of the Ellis Bay Formation (+5‰) and in the lower Aeronian part of the Gun River Formation (+2‰). These positive isotopic carbon excursions provide a distinctive chemostratigraphic signature for regional and global correlations with other O/S sections. Like the Quaternary δ18O marine signal, our δ18O record is largely coupled with multi-order cyclic facies changes. This study demonstrates the importance of glacio-eustasy following the End-Ordovician glacial maxima as one of the primary factors controlling the stratigraphic architecture of paleotropical neritic carbonates during the Early Silurian.
Akzeptanz und Auswirkung körperlich-sportlicher Aktivierung in der interdisziplinären pädiatrischen Adipositas-Nachsorge
Creators: name: Hensler, Nicole
Publisher: name: Universitätsverlag Karlsruhe
Year: 2007
Subjects: Fettsucht
Sport
Spiele

description: Ausgangspunkt der Untersuchung ist die Problematik der evidenzbasierten Erfassung der pädiatrischen Adipositasnachsorge und ihrer Wirksamkeit vor allem im Bezug auf die körperlich-sportliche Aktivität. Forschungsdefizite in den Bereichen der Längsschnittstudien, hohe Drop-Out-Raten der Untersuchungsstichproben, mangelhafte Stichprobenbeschreibungen und der lückenhafte Erkenntnisstand bezüglich der langfristigen Compliance der Kinder bildeten den Ansatz der vorliegenden Arbeit. Die Studie leistet einen Beitrag, diese Forschungsdefizite auszugleichen.
Optimizing the Fit Between Pediatric Dentistry Training Programs and Applicants
Creators: name: Ricker, Kevin
Publisher: name: University of North Carolina at Chapel Hill Graduate School
Year: 2015
Subjects: subject: Dentistry
subject: FOS: Clinical medicine

description: BACKGROUND: The dental postdoctoral application and matching process is a high-stakes and resource-intensive process but little is known regarding its underlying subjective and objective decision-driving influences. This study sought to offer a qualitative insight into the stakeholders' experiences and views on the matching process. METHODS: Interviews with 10 program directors (PD) and 10 recent applicants (RAs) to pediatric dentistry programs in the U.S. were recorded and transcribed verbatim. ATLAS.ti 7.0 software was used for coding and thematic analysis. RESULTS: Both parties appreciated the current process' uniformity; however, they raised issues related to "veracity" and "need for more information". PDs valued "teachability" and "self-motivation" as desirable applicant characteristics. RAs relied on subjective information sources for programs, and prioritized location and financial factors for their rankings. CONCLUSIONS: These results shed light on the postdoctoral matching process in pediatric dentistry and can serve as basis for improving and refining the matching process.
Eddington ratio Distribution of X-ray selected broad-line AGNs at 1.0
Creators: name: Suh, Hyewon
name: Hasinger, Guenther
name: Steinhardt, Charles
name: Silverman, John D.
name: Schramm, Malte
Publisher: name: arXiv
Year: 2015
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We investigate the Eddington ratio distribution of X-ray selected broad-line active galactic nuclei (AGN) in the redshift range 1.0
description: 17 pages, 8 figures; Accepted for publication by ApJ
The Knowledge, Awareness and Perception of Prostate Cancer in Ghanaian Market Women.
Creators: name: Wiafe, Ebenezer
name: Mensah, Kofi
name: Bangalee, Varsha
name: Oosthuizen, Frasia
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Medicine and Health Sciences
subject: Social and Behavioral Sciences

description: This is a project aimed at collecting and analyzing quantitative data to study the knowledge, awareness and perception of prostate cancer in Ghanaian market women.
Superconductivity in doped inversion-symmetric Weyl semimetals
Creators: name: Zhou, Tao
name: Gao, Yi
name: Wang, Z. D.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We study theoretically the superconductivity in doped Weyl semimetals with an inversion symmetry based on the Bogoliubov-de Gennes equations. In principle, the two superconducting states, i.e., the zero momentum BCS-like pairing and the finite momentum Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) pairing are competing in this kind of systems. Our self-consistent calculation indicates that the BCS-type state may be the ground state. The competition between these two pairing states is studied in detail through normal state Fermi surface and the finite energy spectral functions. Generally, the Fermi surface topology supports the FFLO pairing while the finite energy band structure favors the BCS-type pairing. We also study the physical properties and address the Majorana Fermions excitation in these two superconducting state respectively.
description: 7 pages, 5 figures
(Wie) Die O-Phase verändern? Empirische Reflexionen zur Kritik studentischer Hochschuleinführung in Göttingen
Creators: name: Volpers, Simon
name: Brodersen, Folke
Publisher: name: Göttingen : Göttingen Centrum für Geschlechterforschung
Year: 2017
Subjects: Studentische Hochschulkultur
Statuspassagen
Eventisierung
Geschlechterordnungen
Rituale
German student culture
rites des passages
gender roles
rituals

description: Basierend auf qualitativen Erhebungen (teilnehmende Beobachtung, themenzentriert-narratives Inter-view) in den‚ Orientierungsphasen der Studienfächer Physik, Wirtschaftswissenschaften und Sozialwissenschaften werden Göttinger Praxen studentischer Hochschuleinführung rekonstruiert. Diese erfahren in öffentlich-medialen wie hochschulinternen Diskursen eine zunehmende Kritik. Der Beitrag folgt den sich andeutenden Diskursbewegungen, die auf Basis der strukturellen Eigenlogiken der sog. O-Phase verortet und kontrastiert werden. Erörtert werden eine Grundstruktur des Exzesses, darin eingebettete, gewaltförmige vergeschlechtlichte und sexualisierte Praxen sowie die Funktionalität und Anschlussfähigkeit dieser Form des Studieneinstiegs innerhalb gegenwärtiger Transformationen der Hochschule. Der Beitrag entwickelt eine empirisch fundierte Perspektivierung, Zusammenführung und Reformulierung von Kritik.
description: Based on qualitative field work (participant observation, narrative interviews), this paper reconstructs practices of student university initiation for the Physics, Economics and Social Sciences programs in Göttingen. These initiation rites (‘O-Phase’) have increasingly drawn criticism both in the public as well as in discussions within the university itself. The article follows emerging movements of discourse, con-trasting them with the rites’ intrinsic logic. Regarding their underlying structure of excess and their vio-lently gendered and sexualized practices, it discusses whether this way of beginning academic programs is appropriate in the context of the university’s current transformations. The article develops an empiri-cally grounded localization, compilation and reformulation of this criticism.
description: Gender(ed) thoughts ; 1
Potential and recycling strategies for LCD panels from WEEE
Creators: name: Ueberschaar, Maximilian
name: Schlummer, Martin
name: Jalalpoor, Daniel
name: Kaup, Nora
name: Rotter, Vera Susanne
Publisher: name: Technische Universität Berlin
Year: 2017
Subjects: subject: 629 Andere Fachrichtungen der Ingenieurwissenschaften
subject: recycling
subject: recovery
subject: critical metals
subject: polarizer foils
subject: glass substrate
subject: LCD panels

description: Indium is one of the strategically important materials, which have been characterized as critical by various industrialized countries. Despite its high relevance, only low recycling rates are realized. Its main application is in indium tin oxide (ITO), which is used in the production of liquid crystal displays (LCD). However, recovery strategies for indium from LCDs are not yet being implemented in recycling practices. Although LCDs consist of a sandwich compound with additional materials such as glass (80% ± 5%) and polarizer foils (20% ± 5%), recently published recycling approaches focus mainly on the recovery of indium exclusively. This study, first of all, provides information about the quantity and quality of the materials applied in the LCD panels of the various equipment types investigated, such as notebooks, tablets, mobile phones, smartphones, PC monitors, and LCD TVs. The highest indium mass fraction per mass of LCD was determined in mobile phones and the least indium was found in smartphones. Additionally, we found the significant use of contaminating metals like antimony, arsenic, lead, and strontium in the glass fraction. Thus, specific recovery strategies should focus on selected equipment types with the highest indium potential, which is directly related to the sales of new devices and the number of collected end-of-life devices. Secondly, we have developed and successfully tested a novel recycling approach for separating the sandwich compound to provide single output fractions of panel glass, polarizer foils, and an indium concentrate for subsequent recycling. Unfortunately, the strongly varying content of contaminating metals jeopardizes the recycling of this output fraction. Nonetheless, economic recycling approaches need to address all materials contained, in particular those with the highest share in LCD panels such as polarizer foils and panel glass.
Scalar current of created pairs by Schwinger mechanism in de Sitter spacetime
Creators: name: Bavarsad, Ehsan
name: Stahl, Clément
name: Xue, She-Sheng
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider a charged scalar field in a $D$-dimensional de Sitter spacetime and investigate pair creation by a Schwinger mechanism in a constant electric field background. Using a semiclassical approximation the current of the created pairs has been estimated. We find that the semiclassical current of the created pairs in the strong electric field limit responds as $E^{\frac{D}{2}}$. Going further but restricting to $D=3$ dimensional de Sitter spacetime, the quantum expectation value of the spacelike component of the induced current has been computed in the in-vacuum state by applying an adiabatic subtraction scheme. We find that, in the strong electric field limit, the current responds as $E^{\frac{3}{2}}$. In the weak electric field limit the current has a linear response in $E$ and an inverse dependence on the mass of the scalar field. In the case of a massless scalar field, the current varies with $E^{-1}$ which leads to a phenomenon of infrared hyperconductivity. A new relation between infrared hyperconductivity, tachyons, and conformality is discussed, and a scheme to avoid an infrared hyperconductivity regime is proposed. In $D$ dimension, we eventually presented some first estimates of the backreaction of the Schwinger pairs to the gravitational field, and we find a decrease of the Hubble constant due to the pair creation.
description: v2: 41 pages, 4 figures, matches published version
Surface adsorption of sulfonated poly(phenylene sulfone)/C(14)TAB mixtures and its correlation with foam film stability
Creators: name: Uhlig, Martin
name: Miller, Reinhard
name: Klitzing, Regine Von
Publisher: name: Technische Universität Berlin
Year: 2016
Subjects: subject: 540 Chemie und zugeordnete Wissenschaften

description: Dieser Beitrag ist mit Zustimmung des Rechteinhabers aufgrund einer (DFG geförderten) Allianz- bzw. Nationallizenz frei zugänglich.
description: This publication is with permission of the rights owner freely accessible due to an Alliance licence and a national licence (funded by the DFG, German Research Foundation) respectively.
description: Polyelectrolyte/surfactant mixtures of rigid monosulfonated poly(phenylene sulfone) (sPSO(2)-220) and tetradecyl trimethylammonium bromide (C(14)TAB) were investigated by surface tension, surface elasticity and foam film stability measurements. The results were compared to former measurements of polyelectrolyte/surfactant mixtures containing more flexible polyelectrolytes (PAMPS or PSS and C(14)TAB). For all polyelectrolyte/surfactant mixtures an increased surface adsorption in comparison to the pure surfactant was detected. Moreover, sPSO(2)-220/C(14)TAB mixtures showed a much higher surface activity and foam film stability than mixtures with more flexible polyelectrolytes. The results presented give insight into the surface adsorption and foam film formation of rigid polyelectrolyte/surfactant mixtures. Therefore, this study helps to understand the role of polyelectrolyte backbone rigidity in the formation and stabilization of foam films made from polyelectrolyte/surfactant mixtures.
AutSPACEs: co-creating a citizen science platform
Creators: name: Greshake Tzovaras, Bastian
name: Aitkenhead, Georgia
name: Smith, Otis
name: Duncan, Helen
Publisher: name: Zenodo
Year: 2023
Subjects: autism
citizen science
environments
research community
research platform
sensory processing

description: Presentation for an International seminar "Public Space, Play and Neurodiversity" That will take place on 24th January at 11h. (CET) sharing the AutSPACEs citizen science platform and the approach to developing it with a neurodiverse community.
The awareness of women on Prostate cancer: A mixed methods systematic review.
Creators: name: Wiafe, Ebenezer
name: Mensah, Kofi
name: Bangalee, Varsha
name: Oosthuizen, Frasia
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Medicine and Health Sciences
subject: Social and Behavioral Sciences

description: A systematic review aimed at mapping up evidence from qualitative and quantitative studies that assessed the awareness of women on prostate cancer.
Hand and Respiratory Hygiene Practices and the Risk and Transmission of Human Coronavirus Infections in a UK Community Cohort
Creators: name: Hayward, Andrew
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Medicine and Health Sciences

description: This is data from the Flu Watch Cohort Study used to examine the effect of hand and respiratory hygiene on seasonal Coronavirus infection. The methods and results are described in Wellcome Open article Hand and Respiratory Hygiene Practices and the Risk and Transmission of Human Coronavirus Infections in a UK Community Cohort
Light versus dark in strong-lens galaxies: Dark matter haloes that are rounder than their stars
Creators: name: Bruderer, Claudio
name: Read, Justin I.
name: Coles, Jonathan P.
name: Leier, Dominik
name: Falco, Emilio E.
name: Ferreras, Ignacio
name: Saha, Prasenjit
Publisher: name: arXiv
Year: 2015
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We measure the projected density profile, shape and alignment of the stellar and dark matter mass distribution in 11 strong-lens galaxies. We find that the projected dark matter density profile - under the assumption of a Chabrier stellar initial mass function - shows significant variation from galaxy to galaxy. Those with an outermost image beyond $\sim 10$ kpc are very well fit by a projected NFW profile; those with images within 10 kpc appear to be more concentrated than NFW, as expected if their dark haloes contract due to baryonic cooling. We find that over several half-light radii, the dark matter haloes of these lenses are rounder than their stellar mass distributions. While the haloes are never more elliptical than $e_{dm} = 0.2$, their stars can extend to $e_* > 0.2$. Galaxies with high dark matter ellipticity and weak external shear show strong alignment between light and dark; those with strong shear ($γ\gtrsim 0.1$) can be highly misaligned. This is reassuring since isolated misaligned galaxies are expected to be unstable. Our results provide a new constraint on galaxy formation models. For a given cosmology, these must explain the origin of both very round dark matter haloes and misaligned strong-lens systems.
description: 16 pages, 7 figures, 4 tables. Accepted for publication by MNRAS
The APOSTLE simulations: solutions to the Local Group's cosmic puzzles
Creators: name: Sawala, Till
name: Frenk, Carlos S.
name: Fattahi, Azadeh
name: Navarro, Julio F.
name: Bower, Richard G.
name: Crain, Robert A.
name: Vecchia, Claudio Dalla
name: Furlong, Michelle
name: Helly, John. C.
name: Jenkins, Adrian
name: Oman, Kyle A.
name: Schaller, Matthieu
name: Schaye, Joop
name: Theuns, Tom
name: Trayford, James
name: White, Simon D. M.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The Local Group of galaxies offer some of the most discriminating tests of models of cosmic structure formation. For example, observations of the Milky Way (MW) and Andromeda satellite populations appear to be in disagreement with N-body simulations of the "Lambda Cold Dark Matter" (ΛCDM) model: there are far fewer satellite galaxies than substructures in cold dark matter halos (the "missing satellites" problem); dwarf galaxies seem to avoid the most massive substructures (the "too-big-to-fail" problem); and the brightest satellites appear to orbit their host galaxies on a thin plane (the "planes of satellites" problem). Here we present results from APOSTLE (A Project Of Simulating The Local Environment), a suite of cosmological hydrodynamic simulations of twelve volumes selected to match the kinematics of the Local Group (LG) members. Applying the Eagle code to the LG environment, we find that our simulations match the observed abundance of LG galaxies, including the satellite galaxies of the MW and Andromeda. Due to changes to the structure of halos and the evolution in the LG environment, the simulations reproduce the observed relation between stellar mass and velocity dispersion of individual dwarf spheroidal galaxies without necessitating the formation of cores in their dark matter profiles. Satellite systems form with a range of spatial anisotropies, including one similar to that of the MW, confirming that such a configuration is not unexpected in ΛCDM. Finally, based on the observed velocity dispersion, size, and stellar mass, we provide new estimates of the maximum circular velocity for the halos of nine MW dwarf spheroidals.
description: 15 pages, submitted to MNRAS. arXiv admin note: text overlap with arXiv:1412.2748
A systematic review of clinical practice guidelines for recurrent miscarriage
Creators: name: Hennessy, Marita
name: Dennehy, Rebecca
name: Meaney, Sarah
name: Devane, Declan
name: O'Donoghue, Keelin
Publisher: name: Open Science Framework
Year: 2022

description: The aim of this systematic review is to identify, appraise and describe published CPGs for the management, investigation and/or follow-up of RM within high-income countries.
Correlating Cardiac Action Potentials with Metabolic Markers during Acute Cardiac Ischemia in Rabbit Hearts
Creators: name: Kimball, Jeremiah
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2006

description: We have developed the first system, to our knowledge, that simultaneously measures 31P nuclear magnetic resonance (NMR) and optical action potentials (APs) in order to determine the dynamic relationship between certain metabolic markers and AP morphology during acute ischemia in rabbit hearts. Our system utilizes a ratiometric optical technique with transmembrane voltage-sensitive dye, di-4-ANEPPS, to measure APs with no pharmalogical motion inhibition. Fiber optics measure APs by passing light to and from the heart within an NMR magnet. 31P NMR measurements verified the stoichiometric relationship between inorganic phosphate and phosphocreatine; as phosphocreatine levels decrease, inorganic phosphate levels increase. During acute ischemia, intracellular pH levels remained constant and ;-ATP levels decreased 22.4%. Simultaneous optical measurements show reductions in AP amplitude (-83.3%) and heart rate (-56.6%). AP duration increased (+875%), implicating other possible factors. These findings demonstrate a real-time correlation between ischemic depletion of high-energy phosphagens, and decreased AP amplitude and duration.
Enhanced Microfluidic Mixing via a Tricritical Spiral Vortex Instability
Creators: name: Haward, Simon J.
name: Poole, Robert J.
name: Alves, Manuel A.
name: Oliveira, Paulo J.
name: Goldenfeld, Nigel
name: Shen, Amy Q.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Experimental measurements and numerical simulations are made on fluid flow through cross-slot devices with a range of aspect (depth:width) ratios, 0.4 < alpha < 3.87. For low Reynolds numbers Re, the flow is symmetric and a sharp boundary exists between fluid streams entering the cross-slot from opposite directions. Above an alpha-dependent critical value Re_c, the flow undergoes a symmetry-breaking bifurcation (though remains steady and laminar) and a spiral vortex structure develops about the central axis of the outflow channel. An order parameter characterizing the instability grows according to a sixth-order Landau potential, and shows a progression from second order to first order transitions as alpha increases. A tricritical point occurs for alpha ~ 0.55. The spiral vortex acts as a mixing region in the flow field and this phenomenon can be used to drive enhanced mixing in microfluidic devices.
Zika Startup Evaluation Manuscript Extended Data
Creators: name: Aumakhan, Bulbul
name: Massoud, M. Rashad
name: Coly, Astou
name: Chitashvili, Tamar
name: Hager, Salwan
Publisher: name: Open Science Framework
Year: 2022

description: In 2018, the USAID Applying Science to Strengthen and Improve Systems (ASSIST) Project started a new partnership with four Eastern and Southern Caribbean countries impacted by the Zika virus: Antigua and Barbuda, Dominica, St. Kitts and Nevis, and St. Vincent and the Grenadines. The goal of the project was to provide short-term technical assistance (STTA) to strengthen the health systems’ capacity to detect newborns and young children potentially affected by Zika and to address their health needs. To meet these objectives, ASSIST developed an innovative approach based on its existing model for service delivery improvement. An evaluation was conducted to document the STTA startup activities, to identify enabling and constraining factors, and to capture lessons learned.
Zur Modellierung und Simulation von Mehrkörpersystemen unter Berücksichtigung von Greifkontakt bei Robotern
Creators: name: Keppler, Rainer
Publisher: name: Universitätsverlag Karlsruhe
Year: 2007
Subjects: Robotik
Mehrkörpersystem
Greifen
Kontakt
Reduktionsalgorithmus
elasto-plastisches Reibmodell

description: Die vorliegende Arbeit ist durch Problemstellungen motiviert, die im Rahmen des Sonderforschungsbereichs 588 Humanoide Roboter entstanden sind. Sie gliedert sich in zwei große Themenbereiche, in die computergestützte Modellierung von Starrkörpersystemen und in die Modellierung von reibungsbehaftetem Kontakt, wie er typischerweise bei Greifvorgängen einer Roboterhand auftritt.
Towards a Resilient In-Band SDN Control Channel
Creators: name: Goltsmann, Polina
name: Zitterbart, Martina
name: Hecker, Arthur
name: Bless, Roland
Publisher: name: Universität Tübingen
Year: 2017
Subjects: subject: Software-defined networking
subject: 004

description: Towards a Resilient In-Band SDN Control Channel
Work Stress in the Garment Sector: A Systematic Review of Qualitative, Quantitative and Mixed Method Studies
Creators: name: Dreher, Annegret
name: Salandi, Julia
name: Loerbroks, Adrian
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Public Health
subject: Medicine and Health Sciences
subject: Occupational Health and Industrial Hygiene

description: Systematic Review Protocol