cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Weak solution of the non-perturbative renormalization group equation to describe the dynamical chiral symmetry breaking
Creators: name: Aoki, Ken-Ichi
name: Kumamoto, Shin-Ichiro
name: Sato, Daisuke
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We analyze the dynamical chiral symmetry breaking (D$χ$SB) in the Nambu-Jona-Lasinio (NJL) model by using the non-perturbative renormalization group (NPRG) equation. The equation takes a form of two-dimensional partial differential equation for the multi-fermion effective interactions $V(x,t)$ where $x$ is $\barψψ$ operator and $t$ is the logarithm of the renormalization scale. The D$χ$SB occurs due to the quantum corrections, which means it emerges at some finite $t_{\rm c}$ in the mid of integrating the equation with respect to $t$. At $t_{\rm c}$ some singularities suddenly appear in $V$ which is compulsory in the spontaneous symmetry breakdown. Therefore there is no solution of the equation beyond $t_{\rm c}$. We newly introduce the notion of weak solution to get the global solution including the infrared limit $t\rightarrow \infty$ and investigate its properties. The obtained weak solution is global and unique, and it perfectly describes the physically correct vacuum even in case of the first order phase transition appearing in finite density medium. The key logic of deduction is that the weak solution we defined automatically convexifies the effective potential when treating the singularities.
description: 29 pages, 18 figures
Independence and Matching Number in Graphs with Maximum Degree 4
Creators: name: Joos, Felix
Publisher: name: arXiv
Year: 2013
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: We prove that $\frac{7}{4}α(G)+β(G)\geq n(G)$ and $α(G)+\frac{3}{2}β(G)\geq n(G)$ for every triangle-free graph $G$ with maximum degree at most $4$, where $α(G)$ is the independence number and $β(G)$ is the matching number of $G$, respectively. These results are sharp for a graph on $13$ vertices. Furthermore we show $χ(G)\leq \frac{7}{4}ω(G)$ for $\{3K_1,K_1\cup K_5\}$-free graphs, where $χ(G)$ is the chromatic number and $ω(G)$ is the clique number of $G$, respectively.
description: 9 pages
Race Matters: Adoption and Children of Mixed Race Heritage
Creators: name: Agu, Lorraine
Publisher: name: Leeds Beckett University
Year: 2022
Subjects: Uncategorized

description: Within the UK adoption has become a highly politicised and racialised practice as successive governments have promoted adoption above other forms of permanence. The Children and Families Act, 2014, controversially removed the requirement that adoption agencies should ‘give due consideration to the child’s religious persuasion, racial origin and cultural and linguistic background’. Using Critical Race Theory and contemporary sociological discourses, this is the first study to examine how social workers have responded to this legislative reform, to examine if and how race matters within adoption. This qualitative study took place in a local authority and its associated adoption agency. Through the use of semi-structured interviews with nine children’s social workers, six adoption social workers, an agency decision-maker and a focus group with eight members of an adoption panel, this study examined the influence of race and ethnicity on adoption practice for children of mixed racial backgrounds. In providing a theoretical discussion of the construction of race and mixed race, this study examines how mixed race identities are conceptualised within social work assessments and how this informs decision-making and matching with prospective adopters. Through the application of critical race methodologies and thematic analysis, the findings suggested that three interrelated themes: Racial Literacy and Social Work; Race, Adoption and Ethical Literacy and Racially Literate Adoption Practice highlight the salience of race within adoption practice. The study found that despite the removal of the ethnicity clause, race continues to matter for mixed race children within English adoption practice, as many social workers demonstrated an ethical commitment to the significance of race for children’s adoptive identities. The study highlighted increased heterogeneity in categories of mixedness as participants sought to understand the complexity of children’s lived experiences. However, the study identified a lack of racial literacy within adoption practice, which was reflected by an inconsistency in how mixed race identities were represented in assessments and reports, and it was difficult to determine how race and ethnicity were considered in placement decisions. The study concluded that race does not need to be an explicit feature of discourse to remain an invisible presence and highlighted the potential of Critical Race Theory to understand racialisation within adoption policy and practice. The study offers recommendations regarding future research; adoption policy and practice, and social work education and training with the intention of improving the experiences of mixed race children who are seeking adoption.
Symmetry in systems with gyroscopic forces
Creators: name: Kharlamov, M. P.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Differential Geometry (math.DG)
subject: Mathematical Physics (math-ph)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 37J15, 70E17, 70E05, 37J35

description: We consider a generalization of the notion of a natural mechanical system to the case of additional forces of gyroscopic type. Such forces appear, for example, as a result of global reduction of a natural system with symmetry. We study symmetries in the systems with gyroscopic forces to find out when these systems admit a global analogue of a cyclic integral. The results are applied to the problem of the motion of a rigid body about a fixed point in potential and gyroscopic forces to find the most general form of such forces admitting the global area type integral.
description: LaTex, 9 pages, English translation of the paper previuosly published only in Russian
The Cosmic Evolution of XRB Populations with ATHENA
Creators: name: Kovlakas, Konstantinos
name: Zezas, Andreas
name: Fragos, Tassos
name: Anastasopoulou, Konstantina
name: Giorgos Korkidis
Publisher: name: Zenodo
Year: 2022
Subjects: Binary population synthesis
X-ray binaries
X-ray scaling relations
Cosmological simulations
Athena X-ray observatory
Ultraluminous X-ray Sourcs

description: The redshift evolution of the X-ray emission of galaxies is an excellent diagnostic for the cosmological evolution of compact object populations and testing models for binary stellar evolution. These in turn are key ingredients for understanding gravitational wave progenitors and the effect of X-ray binaries in the early Universe. Studies of normal galaxies in the Chandra deep surveys shown evidence for significant cosmological evolution, which is generally attributed to the effect of metallicity. However, these studies detect only a handful of sources at the era of the peak of the star-forming activity of the universe. We discuss how different survey strategies with the ATHENA WFI will help to remedy this limitation by extending our census of normal X-ray emitting galaxies to redshifts higher than 2. A significant challenge will be the characterization of the host galaxies of the X-ray sources and the discrimination between star-forming galaxies from AGN. We discuss potential strategies for overcoming this problem by taking advantage of the available multi-wavelength data in addition to the X-ray data. Finally we discuss how the ATHENA observations fit in the current landscape of X-ray surveys (Chandra, XMM-Newton, eROSITA) and how they will help to improve our understanding of X-ray binary populations and their formation and evolution mechanisms in a cosmological context.
Contact-induced variation in Transylvanian Saxon verb clusters
Creators: name: Bancu, Ariana
Publisher: name: Journal of Historical Syntax
Year: 2020

description: This article illustrates two-verb clusters in Viscri Saxon, a dialect of Transylvanian Saxon (TrSax) spoken in Viscri, Romania, along with Romanian and Standard German. The orders found in Viscri Saxon verb clusters are encountered in West Germanic varieties related to TrSax (e.g. Moselle Franconian, Luxembourgish), but the distributions differ from the ones discussed in other varieties (Dubenion-Smith 2010, Wurmbrand 2017). I argue that word-order variation in Viscri Saxon is the result of syntactic transfer from Standard German, and show that there is flexible distribution between possible word orders. Furthermore, speakers with different linguistic profiles use the available constructions to different degrees, thus illustrating the roles of German and Romanian in the progression of contact-induced changes in Viscri Saxon.
description: Journal of Historical Syntax, Language 95 (2)
Gravitational Forces on a Codimension-2 Brane
Creators: name: Burgess, C. P.
name: van Nierop, L.
name: Williams, M.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We compute the gravitational response of six dimensional gauged, chiral supergravity to localized stress energy on one of two space-filling branes, including the effects of compactifying the extra dimensions and brane back-reaction. We find a broad class of exact solutions, including various black-brane solutions. Several approximate solutions are also described, such as the near-horizon geometry of a small black hole which is argued to be approximately described by a 6D Schwarzschild (or Kerr) black hole, with event horizon appropriately modified to encode the brane back-reaction. The general linearized far-field solutions are found in the 4D regime very far from the source, and all integration constants are related to physical quantities describing the branes and the localized energy source. The localized source determines two of these, corresponding to the source mass and the size of the strength of a coupling to a 4D scalar mode whose mass is parametrically smaller than the KK scale. At large distances the solutions agree with those of 4D general relativity, but for an intermediate range of distances (larger than the KK scale) the solutions better fit a Brans-Dicke theory. For a realistic choice of parameters the KK scale could lie at a micron, while the crossover to Brans-Dicke behaviour could occur at around 10 microns. While allowed by present data this points to potentially measurable changes to Newton's Law arising at distances larger than the KK scale.
description: 31 pages + appendices, 2 figures
Spectral-timing of AGN ionized outflows with Athena
Creators: name: Juráňová, Anna
name: Costantini, Elisa
name: Uttley, Phil
Publisher: name: Zenodo
Year: 2022

description: Recent X-ray spectroscopic studies have shown that photoionized outflows are a common component of active galactic nuclei (AGN). However, a complete characterisation of these outflows is not possible with spectral information alone. We show through extensive simulations that a combination of spectroscopy and timing analysis applied to the data of the future Athena X-ray observatory can reveal the key physical properties of this gas. In particular, we demonstrate that the energy-resolved coherence will be a powerful tool to constrain the location and energetics of AGN outflows over a broad range of gas ionization, with important consequences for the feedback in the host galaxy.
Faddeev calculations of the $\bar{K}NN$ system with chirally-motivated $\bar{K}N$ interaction. II. The $K^- pp$ quasi-bound state
Creators: name: Revai, J.
name: Shevchenko, N. V.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: New calculations of the quasi-bound state in the $K^- pp$ system using Faddeev-type equations in AGS form with coupled $\bar{K}NN$ and $πΣN$ channels were performed. A chiral $\bar{K}N$ potential together with phenomenological models of $\bar{K}N$ interaction with one- and two-pole structure of the $Λ(1405)$ resonance were used. All three potentials reproduce experimental data on low-energy $K^- p$ scattering and kaonic hydrogen with the same level of accuracy. New method of calculating the subthreshold resonance position and width in a three-body system was proposed and used together with the direct search of the resonance pole. We obtained binding energy of the $K^-pp$ quasi-bound state $\sim 32$ MeV with the chirally motivated and $47 - 54$ MeV with the phenomenological $\bar{K}N$ potentials. The width is about $50$ MeV for the two-pole models of the interaction, while the one-pole potential gives $\sim 65$ MeV width. The question of using an energy dependent potential in few-body calculations is discussed in detail. It is shown that ``self-consistent'' variational calculations using such a potential are unable to produce a reasonable approximation to the exact result.
description: 15 pages, 2 figures, 2 tables
Short-duration Radio Bursts with Apparent Extragalactic Dispersion
Creators: name: Saint-Hilaire, Pascal
name: Benz, Arnold O.
name: Monstein, Christian
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: We present the results of the longest yet undertaken search for apparently extragalactic radio bursts at the Bleien Radio Observatory covering 21000 hours (898 days). The data were searched for events of less than 50 ms FWHM duration showing a $ν^{-2}$ drift in the spectrogram characteristic of the delay of radio waves in plasma. We have found five cases suggesting dispersion measures between 350 and 400 cm$^{-3}$ pc while searching in the range of 50 -- 2000 cm$^{-3}$ pc. Four of the five events occurred between 10.27 and 11.24 a.m. local civil time. The only exception occurred at night with the full moon in the beam. It was an event that poorly fits plasma dispersion, but had the characteristics of a solar type III burst. However, we were not able to confirm that it was a lunar reflection. All events were observed with a log-periodic dipole within 6800 hours but none with a more directional horn antenna observing the rest of the time. These properties suggest a terrestrial origin of the "peryton" type reported before. However, the cause of these events remains ambiguous.
description: 8 pages, 2 figures
title: Sex, salvation, and the city : the monastery of Sant'Elisabetta delle Convertite as a civic institution in Florence, 1329-1627
Creators: name: Jack, Gillian
Publisher: name: University of St Andrews
Year: 2018

description: This thesis reassesses the importance of Sant'Elisabetta delle Convertite, a monastery for repentant prostitutes, in Florence from its foundation in 1329 to 1627 after the Grand Duke became the monastery’s protector. Although it was one of the oldest and most populous female houses in the city, historians have tended to underestimate its importance to municipal authorities. This thesis reframes the monastery as a civic institution with a key role in changing municipal responses to prostitution. The thesis makes extensive use of primary source material from the monastery itself, including ricordi (record books), accounts, and contracts, as well as from civic magistrates, particularly the Ufficiali dell’Onestà. Legislative sources from the late thirteenth to the early seventeenth centuries also show how the funding of Sant’Elisabetta reflected the city’s changing responses to the regulation of prostitution, and the funding of Sant’Elisabetta. This thesis argues that the monastery of repentant prostitutes was an important civic institution in late medieval and early modern Florence and became so as a result of civic funding provided in consequence of changing municipal strategies to control prostitution. Successive Florentine municipal administrations acted to ensure the monastery’s survival and stability in response to petitions from the Convertite claiming poverty. The priors’ solutions varied between ad hoc direct funding, portions of the fines and penalties levied by magistrates, and a quarter of prostitutes’ estates, redirected to Sant’Elisabetta until ultimately, the monastery would be brought under the direct control of the Grand Ducal administration in 1620. They also restricted admissions to the monastery, which had the effect of ensuring its longevity by preserving its unique place among the city’s welfare institutions. By tracing municipal interest and intervention in Sant’Elisabetta delle Convertite, this study contributes to knowledge of the significance of the civic role played by the monastery.
Homogeneity of infinite dimensional anti-Kaehler isoparametric submanifolds
Creators: name: Koike, Naoyuki
Publisher: name: arXiv
Year: 2014
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: In this paper, we prove that, if a full irreducible infinite dimensional anti-Kaehler isoparametric submanifold of codimension greater than one has $J$-diagonalizable shape operators, then it is homogeneous.
description: 21pages. arXiv admin note: substantial text overlap with arXiv:1209.1933
Gabor Filter and Rough Clustering Based Edge Detection
Creators: name: Adak, Chandranath
Publisher: name: arXiv
Year: 2014
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: This paper introduces an efficient edge detection method based on Gabor filter and rough clustering. The input image is smoothed by Gabor function, and the concept of rough clustering is used to focus on edge detection with soft computational approach. Hysteresis thresholding is used to get the actual output, i.e. edges of the input image. To show the effectiveness, the proposed technique is compared with some other edge detection methods.
description: Proc. IEEE Conf. #30853, International Conference on Human Computer Interactions (ICHCI'13), Chennai, India, 23-24 Aug., 2013
Selected results from the static characterization of edgeless n-on-p planar pixel sensors for ATLAS upgrades
Creators: name: Giacomini, Gabriele
name: Bagolini, Alvise
name: Bomben, Marco
name: Boscardin, Maurizio
name: Bosisio, Luciano
name: Calderini, Giovanni
name: Chauveau, Jacques
name: La Rosa, Alessandro
name: Marchiori, Giovanni
name: Zorzi, Nicola
Publisher: name: arXiv
Year: 2013
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: In view of the LHC upgrade for the High Luminosity Phase (HL-LHC), the ATLAS experiment is planning to replace the Inner Detector with an all-Silicon system. The n-on-p technology represents a valid solution for the modules of most of the layers, given the significant radiation hardness of this option and the reduced cost. There is also the demand to reduce the inactive areas to a minimum. The ATLAS LPNHE Paris group and FBK Trento started a collaboration for the development on a novel n-on-p edgeless planar pixel design, based on the deep-trench process which can cope with all these demands. This paper reports selected results from the electrical characterization, both before and after irradiation, of test structures from the first production batch.
description: 10 pages, 8 figures, proceedings of the conference IPRD13, Siena (Italy)
An examination of the factors that influence municipalities to report performance measures online
Creators: name: Fudge, Marc
Publisher: name: No Publisher Supplied
Year: 2011

description: Currently, the use of information and communication technologies (ICTs) in government is growing at a frenetic pace. Consequently, governments are relying upon ICTs to increase efficiency, improve effectiveness and enhance service delivery to the public. To accomplish this goal, governments are infusing features of e-governance to improve government-to-citizen (G2C) communication (Gibson, et al., 2002). Taking full advantage of available technology, many municipal governments have begun to report their performance measures online. While the activities of governments who select to communicate performance information to the public online seems as if it would be a natural progression within contemporary public administration, evidence supporting this activity is unclear. The crystallization of e-governance and performance reporting is the focus of this study. Specifically, this research examines online performance reporting to external stakeholders, thus the primary research question is: what are the factors influencing United States municipal governments to report performance measurement data online? This research applies a mixed methodology to assess the factors that influence local governments to publish performance measurement data online. The factors studied that are expected to impact online performance reporting are socioeconomic conditions, the structure of the government and leadership characteristics. A website content analysis of the 200 most populated U.S. cities was employed to examine the municipalities that publish performance data online. To evaluate the municipalities that do report performance online, an index was constructed that assesses 30 features of the performance report. Finally, 19 semi-structured interviews with municipal managers were conducted to explore additional factors that may impact online performance reporting at the local level of government. The study reveals that a great deal of variation exists within municipal governments that actually do report performance online. At this point, online performance reports commonly provide a great deal of general information and less substantive and exhaustive details. The results of this research may be viewed as an indication that online performance reporting is a unique feature of local governments and it is a phenomenon deeply rooted within the culture of governments who aim to be responsive and transparent to the public.
Solving Poisson Equation by Genetic Algorithms
Creators: name: Jebari, Khalid
name: Madiafi, Mohammed
name: Moujahid, Abdelaziz El
Publisher: name: arXiv
Year: 2014
Subjects: subject: Neural and Evolutionary Computing (cs.NE)
subject: FOS: Computer and information sciences

description: This paper deals with a method for solving Poisson Equation (PE) based on genetic algorithms and grammatical evolution. The method forms generations of solutions expressed in an analytical form. Several examples of PE are tested and in most cases the exact solution is recovered. But, when the solution cannot be expressed in an analytical form, our method produces a satisfactory solution with a good level of accuracy
Stakeholder perceptions on the role of community development corporations and resident participation
Creators: name: Gaynor, Tia Sheree
Publisher: name: No Publisher Supplied
Year: 2011

description: Community Development Corporations (CDCs) were formed in the United States to address issues in urban communities and often work with municipal governments on these issues (Keating, 1997; Jennings, 2004). In some neighborhoods, CDCs seek to rebuild and revitalize communities that suffered from social unrest, while others react to the lack of government or inadequate programming addressing the economic and social maladies of urban communities. The work of CDCs requires the involvement of all community stakeholders – particularly city residents and public administrators. Does thedual relationship CDCs have with residents and local government suggest that they bring both closer together? This research studies this phenomenon by using Arnstein’s Ladder of Participation to examine the role CDCs play in cultivating citizen participation.Specifically, this study seeks to examine how community stakeholders perceive the roleCDCs play in fostering resident participation in local government. As a primary methodological tool for studying individual and group perspectives,Q-method was employed to empirically study community stakeholder perceptions ofCDCs. Key research findings suggest that: a) community stakeholders believe that CDCsare currently working to maintain the status quo of participation and advise that the Context of Conventional Participation (1995) is present, b) stakeholders overwhelmingly believe that CDCs should work to encourage participation that incorporates partnership, and c) there should be less distance between residents and decision making, thereby increasing opportunities for engagement. Through the exploration of the subjective, this study exposes the perspective ofresidents on citizen participation and identifies the need for a new direction of theory development that examines the creation of consensus and partnership building incommunity development organizations and initiatives. Furthermore, Conditions for Ideal Participation emerges from the data providing a practical guideline for strengthening participation in municipal government. Conclusions from this study have both theoretical and practical implications to the scholarly and administrative work comprised of public administration.
The 2XMMi/SDSS Galaxy Cluster Survey. III. Clusters associated with spectroscopically targeted luminous red galaxies in SDSS-DR10
Creators: name: Takey, A.
name: Schwope, A.
name: Lamer, G.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present a sample of 383 X-ray selected galaxy groups and clusters with spectroscopic redshift measurements (up to z ~ 0.79) from the 2XMMi/SDSS Galaxy Cluster Survey. The X-ray cluster candidates were selected as serendipitously detected sources from the 2XMMi-DR3 catalogue that were located in the footprint of the Sloan Digital Sky Survey (SDSS-DR7). The cluster galaxies with available spectroscopic redshifts were selected from the SDSS-DR10. We developed an algorithm for identifying the cluster candidates that are associated with spectroscopically targeted luminous red galaxies and for constraining the cluster spectroscopic redshift. A cross-correlation of the constructed cluster sample with published optically selected cluster catalogues yielded 264 systems with available redshifts. The present redshift measurements are consistent with the published values. The current cluster sample extends the optically confirmed cluster sample from our cluster survey by 67 objects. Moreover, it provides spectroscopic confirmation for 78 clusters among our published cluster sample, which previously had only photometric redshifts. Of the new cluster sample that comprises 67 systems, 55 objects are newly X-ray discovered clusters and 52 systems are sources newly discovered as galaxy clusters in optical and X-ray wavelengths. Based on the measured redshifts and the fluxes given in the 2XMMi-DR3 catalogue, we estimated the X-ray luminosities and masses of the cluster sample.
description: A&A in press, 12 pages, 15 figures, 1 table, http://www.aanda.org/index.php?option=com_article&access=doi&doi=10.1051/0004-6361/201322973
Discretion and influence at the front lines
Creators: name: Henderson, Alexander C.
Publisher: name: No Publisher Supplied
Year: 2011

description: Understanding the factors that influence the behavior of front-line emergency medical services (EMS) providers is critical as these individuals can have a substantiveimpact on the health of the patients they treat. EMS providers can be examined as “street levelbureaucrats,” focusing specifically on the interrelationships between rules, discretion, and influence that surround the primary tasks of the occupation. To begin a conversation on this critical public service a mixed methods research design is employed, using qualitative data to inform quantitative data collection and analysis. The initial phaseconsisted of content analysis of policy documents, 30 semi-structured interviews, and three focus groups. A web-based survey was then employed to measure variables of interest emerging from the qualitative data collected. Results indicate that substantial rule complexity is the norm. General ruleabidanceis notable, especially in cases of extremely minor or very severe medical or traumatic emergencies. Where discretion is unrestricted sources of influence such aspatient characteristics, peers and supervisory staff, medical command physicians, and situational factors were notable. In other cases rules were not sufficient to regulate behavior, and rule application was complicated by factors such as paramedic communication skills, patient identity, and bystanders. Deviation from rules occurred in several instances as a result of influences from patient need, occupational culture, and peer paramedics. Results from quantitative analysis show support for several relationships of interest. Experienced paramedics are increasingly likely to bend rules in the face of patient benefit, and paramedics who are better able to understand the perspectives of others are likely to exhibit a more favorable rating of patient worthiness. Theoretical contributions of this research include refinement of theories of street levelbureaucracy with attention to the nature of discretion in the unique context of EMS. Additionally, this study serves to bridge a gap between disparate areas of empirical research in the field of EMS, bringing together clinical, educational, and systems-level emphases. Practical contributions of this research improvement of patient care and outcomes by aligning discretionary behavior with clinical goals and patient outcomes,and the generation of additional considerations for improving initial professional education and on-going training of front-line EMS providers.
A sterile neutrino at MiniBooNE and IceCube
Creators: name: Masip, Manuel
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We discuss the possibility that a sterile neutrino of mass around 50 MeV slightly mixed with the muon flavor may be the origin of the MiniBooNE anomaly. We show that its production in the atmosphere in a fraction of kaon decays would imply an excess of contained showers at IceCube from down-going and near-horizontal directions.
description: 12 pages, talk presented at II Russian-Spanish Congress: Particle and Nuclear Physics at all Scales, Saint-Petersburg, October 1-4, 2013
Chemical abundances of stars with brown-dwarf companions
Creators: name: Sánchez, D. Mata
name: Hernández, J. I. González
name: Israelian, G.
name: Santos, N. C.
name: Sahlmann, J.
name: Udry, S.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: It is well-known that stars with giant planets are on average more metal-rich than stars without giant planets, whereas stars with detected low-mass planets do not need to be metal-rich. With the aim of studying the weak boundary that separates giant planets and brown dwarfs (BDs) and their formation mechanism, we analyze the spectra of a sample of stars with already confirmed BD companions both by radial velocity and astrometry. We employ standard and automatic tools to perform an EW-based analysis and to derive chemical abundances from CORALIE spectra of stars with BD companions. We compare these abundances with those of stars without detected planets and with low-mass and giant-mass planets. We find that stars with BDs do not have metallicities and chemical abundances similar to those of giant-planet hosts but they resemble the composition of stars with low-mass planets. The distribution of mean abundances of $α$-elements and iron peak elements of stars with BDs exhibit a peak at about solar abundance whereas for stars with low-mass and high-mass planets the [X$_α$/H] and [X$_{\rm Fe}$/H] peak abundances remain at $\sim -0.1$~dex and $\sim +0.15$~dex, respectively. We display these element abundances for stars with low-mass and high-mass planets, and BDs versus the minimum mass, $m_C \sin i$, of the most-massive substellar companion in each system, and we find a maximum in $α$-element as well as Fe-peak abundances at $m_C \sin i \sim 1.35\pm 0.20$ jupiter masses. We discuss the implication of these results in the context of the formation scenario of BDs in comparison with that of giant planets.
description: Accepted for publication in Astronomy & Astrophysics
Superfluid-Mott insulator transition in spin-orbit coupled Bose-Hubbard Model
Creators: name: Bolukbasi, A. T.
name: Iskin, M.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We consider a square optical lattice in two dimensions and study the effects of both the strength and symmetry of spin-orbit-coupling (SOC) and Zeeman field on the ground-state, i.e., Mott insulator (MI) and superfluid (SF), phases and phase diagram, i.e., MI-SF phase transition boundary, of the two-component Bose-Hubbard model. In particular, based on a variational Gutzwiller ansatz, our numerical calculations show that the spin-orbit coupled SF phase is a nonuniform (twisted) one with its phase (but not the magnitude) of the order parameter modulating from site to site. Fully analytical insights into the numerical results are also given.
description: 12 pages with 6 figures
Strongly Interacting Electroweak Symmetry Breaking Sector with a Higgs-like light scalar
Creators: name: Dobado, Antonio
name: Delgado, Rafael L.
name: Llanes-Estrada, Felipe J.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The apparent finding of a 125-GeV light Higgs boson closes unitarity of the minimal Standard Model (SM), that is weakly interacting: this is an exceptional feature not generally true if new physics exists beyond the mass gap found at the LHC up to 700 GeV. Such new physics induces departures of the low-energy dynamics for the minimal electroweak symmetry-breaking sector, with three Goldstone bosons (related to longitudinal W bosons) and one light scalar, from the SM couplings. We calculate the scattering amplitudes among these four particles and their partial-wave projections in effective theory. For this we employ the Electroweak Chiral Lagrangian extended by one light scalar and carry out the complete one-loop computation at high energy including the counterterms needed for perturbative renormalization, of dimension eight. For most of parameter space, the scattering is strongly interacting (with the SM a remarkable exception). We therefore explore various unitarization methods, that can already be applied to the tree-level $W_L W_L$ amplitude; we find and study a natural second sigma-like scalar pole there.
description: Delivered at the II Russian-Spanish Congress "Particle and Nuclear Physics at all Scales and Cosmology" Institute of Cosmos Sciences, Saint-Petersburg, October 1-4, 2013. To be published (AIP proc.)
Modelling of Sigma Scorpii, a high-mass binary with a Beta Cep variable primary component
Creators: name: Tkachenko, A.
name: Aerts, C.
name: Pavlovski, K.
name: Degroote, P.
name: Papics, P. I.
name: Moravveji, E.
name: Lehmann, H.
name: Kolbas, V.
name: Clemer, K.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: High-mass binary stars are known to show an unexplained discrepancy between the dynamical masses of the individual components and those predicted by models. In this work, we study Sigma Scorpii, a double-lined spectroscopic binary system consisting of two B-type stars residing in an eccentric orbit. The more massive primary component is a Beta Cep-type pulsating variable star. Our analysis is based on a time-series of some 1000 high-resolution spectra collected with the CORALIE spectrograph in 2006, 2007, and 2008. We use two different approaches to determine the orbital parameters of the star; the spectral disentangling technique is used to separate the spectral contributions of the individual components in the composite spectra. The non-LTE based spectrum analysis of the disentangled spectra reveals two stars of similar spectral type and atmospheric chemical composition. Combined with the orbital inclination angle estimate found in the literature, our orbital elements allow a mass estimate of 14.7 +/- 4.5 and 9.5 +/- 2.9 solar mass for the primary and secondary component, respectively. The primary component is found to pulsate in three independent modes, of which two are identified as fundamental and second overtone radial modes, while the third is an l = 1 non-radial mode. Seismic modelling of the pulsating component refines stellar parameters to 13.5 +0.5/-1.4 and 8.7 +0.6/-1.2 solar mass, and delivers radii of 8.95 +0.43/-0.66 and 3.90 +0.58/-0.36 solar radii for the primary and secondary, respectively. The age of the system is estimated to be ~12 Myr.
description: 13 pages, 8 figures, 10 tables; accepted for publication in MNRAS
Evaluating Dynamic Linking through the Query Process using the Licas Test Platform
Creators: name: Greer, Kieran
Publisher: name: arXiv
Year: 2014
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences

description: A novel linking mechanism has been described previously [4] that can be used to autonomously link sources that provide related answers to queries executed over an information network. The test query platform has now been re-written resulting in essentially a new test platform using the same basic query mechanism, but with a slightly different algorithm. This paper describes recent test results on the same query test process that supports the original findings and also shows the effectiveness of the linking mechanism in a new set of test scenarios.
description: White paper / pre-print
CBS Lunch Lecture - A short tour of Citizen Science and its impacts
Creators: name: Gold, Margaret
Publisher: name: Zenodo
Year: 2022
Subjects: Citizen Science

description: Lunch Lecture at the Central Bureau for Statistics, Netherlands - 14 October, 2022 A short tour of Citizen Science and its impacts Anouk Spelt (Citizen Science Nederland - Community Manager) and Margaret Gold (Citizen Science Lab, University Leiden) Citizen science is scientific research conducted, in whole or in part, by amateur (or nonprofessional) scientists. Application ranges from Citizen Observatories (COs) for environmental monitoring, to Citizen Gathered Data (CGD) for the UN Sustainable Development Goals (SDGs). In this workshop the Citizen Science Lab at Leiden University will present some of the different forms that Citizen Science can take and the types of impacts such initiatives can have. We will initiate a conversation on what the potential value for CBS could be, and the role that the CBS can play in the Citizen Science landscape in the Netherlands.
Coherent control of optical activity and optical anisotropy of thin metamaterials
Creators: name: Mousavi, Seyedmohammad A.
name: Plum, Eric
name: Shi, Jinhui
name: Zheludev, Nikolay I.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: The future fibre optic communications network will rely on photons as carriers of information, which may be stored in intensity, polarization or phase of light. However, processing of such optical information usually relies on electronics. Aiming to avoid the conversion between optical and electronic signals, modulation of light with light based on optical nonlinearity has become a major research field, but real integrated all-optical systems face thermal management and energy challenges. On the other hand, it has recently been demonstrated that the interaction of two coherent light beams on a thin, lossy, linear material can lead to large and ultrafast intensity modulation at arbitrarily low power resulting from coherent absorption. Here we demonstrate that birefringence and optical activity (linear and circular birefringence and dichroism) of functional materials can be coherently controlled by placing a thin material slab into a standing wave formed by the signal and control waves. Efficient control of the polarization azimuth and ellipticity of the signal wave with the coherent control wave has been demonstrated in proof-of-principle experiments in different chiral and anisotropic microwave metamaterials.
description: 11 pages, 7 figures
A methodology to evaluate the effectiveness of educational components in juvenile detention facilities
Creators: name: Gregg, Linda
Publisher: name: No Publisher Supplied
Year: 2011

description: The criminal justice and education system would appear to have opposing if not contradictory functions in democratic society, the first to protect society from wrongdoing and punish wrongdoers and the second to positively enhance individual growth and social development. Critics of juvenile detention highlight the extent to which rehabilitation and support activities are subordinated to discipline and management. Thisthesis starts from this normative presumption that detention can and should support the juvenile offender’s transition back into the community and asks, “How effective are educational components in juvenile detention facilities?” from this vantage. My approachwas to develop a research model designed to answer this question by measuring the degree to which time in school and ‘idle time” are used to meet the goals of control vs. rehabilitation. This research hopes to add to a growing dialogue on the significance of “short-termplacement” in a continuum to reentry into the community for youth most at-risk of educational failure and of becoming repeat offenders. The aim is to: 1) express that protection and control are the goals of juvenile detention; 2) provide a useable empirical model to classify detention programs according to their orientation; and, 3) show how application of this model could be used to reorient educational programming and the programming of ‘idle time’ in detention to transitional support and rehabilitation. I devised a BLE index to classify program activities according to whether time in detention contributes to a broader learning environment or to control; and finally, I suggest how theBLE index could be applied to help juvenile detention better reflect the goals of transition and rehabilitation. Efficient use of time while in detention is a central point of this study. What needs to change is the presumption that the only purpose of detention is “to ensure the youthappears for all court hearings and to protect the community from future offending.” This position shortchanges any opportunity to develop programs from a reentry frame of mind. Detention is a major stop in the juvenile justice cycle. The methodology used to create aBLE, was designed to enable accountability measures to evaluate educational components in juvenile detention.
Design and implementation of the Customer Experience Data Mart in the Telecommunication Industry: Application Order-To-Payment end to end process
Creators: name: Benhima, Mounire
name: Reilly, John P.
name: Naamane, Zaineb
name: Kharbat, Meriam
name: Kabbaj, Mohammed Issam
name: Esqalli, Oussama
Publisher: name: arXiv
Year: 2014
Subjects: subject: Other Computer Science (cs.OH)
subject: FOS: Computer and information sciences

description: Facing the new market challenges, service providers are looking for solutions to improve three major business areas namely the Customer Experience, The Operational Efficiency and Revenue and Margin. To meet the business requiements related to these areas, service providers are going through three major transformation programs namely the Business Support Systems transformation program for Customer related aspects, the Operations Support System transformation program for mainly service Fulfillment and Assurance and Resource, Fulfillment and Assurance, and Time To Market Transformation program for Products ans Services development and management. These transformations are about making a transition from a current situation with all its views to a desired one. The information view transformation is about reorganizing and reengineering the existing information to be used for the day to day activities and reporting to support decision making. For reporting purpose, service providers have to invest in Business Intelligence solutions. For which the main purpose is to provide the right information in a timely manner to efficiently support the decision making. One of the key BI challenges is to model an information structure where to host all the information coming from multiple sources. The purpose of this paper is to suggest a step by step methodology to design a Telco Data Mart, one of the fundamental BI components. Order-To-Payment, an end to end customer process, will be used as an application for this methodology. Our methodology consists on bringing together the concepts of business intelligence and the telecom business frameworks developed by the TM Forum: the Business Process Framework, the Information Framework, and the Business Metrics. The advantage of this solution is its ability to adapt to any telecom enterprise architecture since it's built around the business standards.
description: 25 pages, 24 figures, 17 tables, IJCSI