cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The structure of pentaquarks $P_c^+$ in the chiral quark model
Creators: name: Yang, Gang
name: Ping, Jialun
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The recent experimental results of LHCb collaboration suggested the existence of pentaquark states with charmonium. To understand the structure of the states, a dynamical calculation of 5-quark systems with quantum numbers $IJ^P=\frac{1}{2}(\frac{1}{2})^\pm$, $\frac{1}{2}(\frac{3}{2})^\pm$ and $\frac{1}{2}(\frac{5}{2})^\pm$ is performed in the framework of chiral quark model with the help of gaussian expansion method. The results show that the negative parity states can be bound states while all of the positive parity states are the scattering states. The $P_c(4380)$ state is suggested to be the bound state of $Σ^*_cD$. Although the energy of $Σ_cD^*$ is very close to the mass of $P_c(4450)$, the inconsistent parity prevents the assignment. The calculated distances between quarks confirm the molecular nature of the states. Other five-quark bound states of the combination of $Σ_cD$ and $Σ^*_cD^*$ are also found in the region about 4.3GeV and 4.5GeV.
description: 6 pages, 1 figure
Molecule-photon interactions in phononic environments
Creators: name: Reitz, Michael
name: Sommer, Christian
name: Gurlek, Burak
name: Sandoghdar, Vahid
name: Martin-Cano, Diego
name: Genes, Claudiu
Publisher: name: arXiv
Year: 2019
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Molecules constitute compact hybrid quantum optical systems that can interface photons, electronic degrees of freedom, localized mechanical vibrations and phonons. In particular, the strong vibronic interaction between electrons and nuclear motion in a molecule resembles the optomechanical radiation pressure Hamiltonian. While molecular vibrations are often in the ground state even at elevated temperatures, one still needs to get a handle on decoherence channels associated with phonons before an efficient quantum optical network based on opto-vibrational interactions in solid-state molecular systems could be realized. As a step towards a better understanding of decoherence in phononic environments, we take here an open quantum system approach to the non-equilibrium dynamics of guest molecules embedded in a crystal, identifying regimes of Markovian versus non-Markovian vibrational relaxation. A stochastic treatment based on quantum Langevin equations predicts collective vibron-vibron dynamics that resembles processes of sub- and superradiance for radiative transitions. This in turn leads to the possibility of decoupling intramolecular vibrations from the phononic bath, allowing for enhanced coherence times of collective vibrations. For molecular polaritonics in strongly confined geometries, we also show that the imprint of opto-vibrational couplings onto the emerging output field results in effective polariton cross-talk rates for finite bath occupancies.
description: [v2]: revised abstract and introduction, [v3]: corrected rotating frame in Eqs. (31)
Signal Clustering with Class-independent Segmentation
Creators: name: Gasperini, Stefano
name: Paschali, Magdalini
name: Hopke, Carsten
name: Wittmann, David
name: Navab, Nassir
Publisher: name: arXiv
Year: 2019
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: Signal Processing (eess.SP)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Radar signals have been dramatically increasing in complexity, limiting the source separation ability of traditional approaches. In this paper we propose a Deep Learning-based clustering method, which encodes concurrent signals into images, and, for the first time, tackles clustering with image segmentation. Novel loss functions are introduced to optimize a Neural Network to separate the input pulses into pure and non-fragmented clusters. Outperforming a variety of baselines, the proposed approach is capable of clustering inputs directly with a Neural Network, in an end-to-end fashion.
description: Under Review for IEEE ICASSP 2020
Automated snow avalanche release area delineation in data sparse, remote, and forested regions -- Code and Data
Creators: name: Sykes, John
name: Haegeli, Pascal
name: Bühler, Yves
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Other Earth Sciences
subject: FOS: Earth and related environmental sciences
subject: Physical Sciences and Mathematics
subject: Earth Sciences
subject: Snow Avalanche

description: Code and data for producing input data sets for high resolution PRA modelling and determining optimal input parameters using local validation.
Book Review: Planning and Urban Design Standards
Creators: name: Venne, Bridget
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2007

description: The book Planning and Urban Design Standards is a part of the well-recognized Graphic Standards series, which includes Architectural Graphic Standards, Interior Graphic Standards, and Landscape Architectural Graphic Standards. Urban designers, planners, and architects have long considered these books the go-to guides for everything from parking-lot spacing to proper restroom layouts. This particular installment in the series, Planning and Urban Design Standards, expands upon the existing model by including planning theory and planning process design alongside the traditional descriptions of environmental conditions, building types, utility layouts, and transportation patterns.
Non-archimedean integrals as limits of complex integrals
Creators: name: Ducros, A.
name: Hrushovski, E.
name: Loeser, F.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Algebraic Geometry (math.AG)
subject: Logic (math.LO)
subject: FOS: Mathematics
subject: 14G22, 03C98 (Primary) 03C20, 14T05 (Secondary)

description: We explain how non-archimedean integrals considered by Chambert-Loir and Ducros naturally arise in asymptotics of families of complex integrals. To perform this analysis we work over a non-standard model of the field of complex numbers, which is endowed at the same time with an archimedean and a non-archimedean norm. Our main result states the existence of a natural morphism between bicomplexes of archimedean and non-archimedean forms which is compatible with integration.
description: 69 pages
A Report Card on Urban Erosion and Sedimentation Control in North Carolina
Creators: name: Burby, Raymond J.
name: Luger, Michael I.
name: Kaiser, Edward J.
name: Paterson, Robert G.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 1990

description: In 1973 North Carolina enacted what has become one of the most stringent erosion and sedimentation control programs in the nation. This article discusses how a survey of 128 construction sites in North Carolina turned up evidence that practice falls short of state goals to curb urban erosion and sedimentation. The authors then discuss policy options to remedy these shortcomings.
Functional PCA with Covariate Dependent Mean and Covariance Structure
Creators: name: Ding, Fei
name: He, Shiyuan
name: Jones, David E.
name: Huang, Jianhua Z.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Methodology (stat.ME)
subject: Applications (stat.AP)
subject: Computation (stat.CO)
subject: FOS: Computer and information sciences

description: Incorporating covariates into functional principal component analysis (PCA) can substantially improve the representation efficiency of the principal components and predictive performance. However, many existing functional PCA methods do not make use of covariates, and those that do often have high computational cost or make overly simplistic assumptions that are violated in practice. In this article, we propose a new framework, called Covariate Dependent Functional Principal Component Analysis (CD-FPCA), in which both the mean and covariance structure depend on covariates. We propose a corresponding estimation algorithm, which makes use of spline basis representations and roughness penalties, and is substantially more computationally efficient than competing approaches of adequate estimation and prediction accuracy. A key aspect of our work is our novel approach for modeling the covariance function and ensuring that it is symmetric positive semi-definite. We demonstrate the advantages of our methodology through a simulation study and an astronomical data analysis.
description: 28 pages, 3 figures
Higher dimensional essential minima and equidistribution of cycles
Creators: name: Gualdi, Roberto
name: Martínez, César
Publisher: name: arXiv
Year: 2020
Subjects: subject: Number Theory (math.NT)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14G40, 11G35, 14C25

description: The essential minimum and equidistribution of small points are two well-established interrelated subjects in arithmetic geometry. However, there is lack of an analogue of essential minimum dealing with higher dimensional subvarieties, and the equidistribution of these is a far less explored topic. In this paper, we introduce a new notion of higher dimensional essential minimum and use it to prove equidistribution of generic and small effective cycles. The latter generalizes the previous higher dimensional equidistribution theorems by considering cycles and by allowing more fexibility on the arithmetic datum.
description: 37 pages. To appear in Annales de l'Institut Fourier
Cash, Condos, and Crisis: What about North Carolina?
Creators: name: Hollifield, M. Shea
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 1981

description: The conversion of rental housing units to single ownership or condominiums has become an increasingly significant component of the American housing market. Between 1970 and 1979, 346,476 rental units were converted to condominiums, and the Department of Housing and Urban Development(HUD) projects that an additional 1.1 million units will be converted between 1979 and 1985 (HUD, I98O, pp. IV-6, ii). A great deal of controversy and speculation has been generated regarding the effect these conversions will have on the housing market. The Southeast, with the exception of resort areas in Florida, has not experienced the same rate of conversions that other sections of the country have. Continued growth and industrialization, accompanied by the continual high cost of new construction, indicate that Southern states can expect to see increased conversion activity in the 1980s. Instead of responding to conversions reactively, North Carolina state and local governments need to take steps to limit the negative impacts that other regions have experienced. A study of national conversion trends, consideration of local situations and needs and analyses of existing and proposed state legislation would enable North Carolina to formulate a framework that is suitable to address conversions both today and in five years.
Property Rights Legislation: North Carolina's Hog Farm Problem and the Forgotten Rights of the Land Owners Downstream
Creators: name: Davis, Jennifer L.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 1996

description: North Carolina has a hog farm problem. As the hog farm industry grows in North Carolina, so do the environmental disasters that accompany it. This paper will examine the environmental dangers that the hog farm industry has posed to North Carolina's rivers and streams and the failure of the state to adequately prevent those harms from occurring. Then, this paper will address general legal protections against regulation by state and federal legislatures, including a discussion of the U.S. Supreme Court's regulatory takings analysis and the increasing popularity of "takings bills" in state and federal legislatures. Specifically, this paper will review a "takings bill" being considered by the North Carolina General Assembly that would compensate a private property owner for any diminution in value of her land caused by a state regulation. At the same time, the Assembly was considering more stringent regulation of hog farms. Finally, this paper will argue that a takings bill in North Carolina would not only detrimentally affect the extent to which the state could regulate hog farms that pollute the state's rivers and streams, but would also be unfair to the landowners who live downstream from those hog farmers and who are denied beneficial use of their land because of the state's failure to regulate.
Hydrogen-substituted superconductors SmFeAsO1-xHx misidentified as oxygen-deficient SmFeAsO1-x
Creators: name: Muraba, Yoshinori
name: Iimura, Soshi
name: Matsuishi, Satoru
name: Hosono, Hideo
Publisher: name: arXiv
Year: 2015
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We investigated the preferred electron dopants at the oxygen sites of 1111-type SmFeAsO by changing the atmospheres around the precursor with the composition of Sm:Fe:As:O = 1:1:1:1-x in high-pressure synthesis. Under H2O and H2 atmospheres, hydrogens derived from H2O or H2 molecules were introduced into the oxygen sites as a hydride ion, and SmFeAsO1-xHx was obtained. However, when the H2O and H2 sources were removed from the synthetic process, nearly stoichiometric SmFeAsO was obtained and the maximum amount of oxygen vacancies introduced remained x = 0.05(4). Density functional theory calculations indicated that substitution of hydrogen in the form of H- is more stable than the formation of an oxygen vacancy at the oxygen site of SmFeAsO. These results strongly imply that oxygen-deficient SmFeAsO1-x reported previously is SmFeAsO1-xHx with hydride ion incorporated unintentionally during high-pressure synthesis.
Convex Combinatorial Auction of Pipeline Network Capacities
Creators: name: Csercsik, Dávid
Publisher: name: arXiv
Year: 2020
Subjects: subject: Theoretical Economics (econ.TH)
subject: FOS: Economics and business

description: In this paper we propose a mechanism for the allocation of pipeline capacities, assuming that the participants bidding for capacities do have subjective evaluation of various network routes. The proposed mechanism is based on the concept of bidding for route-quantity pairs. Each participant defines a limited number of routes and places multiple bids, corresponding to various quantities, on each of these routes. The proposed mechanism assigns a convex combination of the submitted bids to each participant, thus its called convex combinatorial auction. The capacity payments in the proposed model are determined according to the Vickrey-Clarke-Groves principle. We compare the efficiency of the proposed algorithm with a simplified model of the method currently used for pipeline capacity allocation in the EU (simultaneous ascending clock auction of pipeline capacities) via simulation, according to various measures, such as resulting utility of players, utilization of network capacities, total income of the auctioneer and fairness.
Comprehensive Access Management: An Alternative To Highway Construction
Creators: name: Gerstle, George
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 1984

description: Until recently, strip development has been viewed primarily as a land use issue. Such development does, however, have a strong relationship to the transportation system. Methods for dealing with the effects of strip development on roadways have rarely been handled in a consistent manner. Access management is a method for controlling the impacts of strip development on the roadway system which effectively balances the access needs of the roadway.
title: Smooth Pursuit and Antisaccade Eye Movements as Endophenotypes in Schizophrenia Spectrum Research
Creators: name: Ettinger, Ulrich
Publisher: name: Goldsmiths, University of London
Year: 2003

description: Smooth pursuit eye movement (SPEM) and antisaccade deficits have been proposed as schizophrenia spectrum endophenotypes. An endophenotype is a behavioural or biological deficit thought to represent, more closely than the disease phenotype, the effects of an underlying disease gene. Oculomotor endophenotypes possess phenotypic homogeneity, well-understood neural correlates and objective assessment and may thus be used as phenotypes in linkage studies. This thesis investigated a number of issues concerning the reliability and validity of the SPEM and antisaccade tasks as schizophrenia spectrum endophenotypes (and two tasks thought to be unimpaired in the schizophrenia spectrum, visual fixation and prosaccades). The schizophrenia spectrum encompasses not only people with schizophrenia but any population with an increased frequency of schizophrenia-related phenotypes or genotypes, such as schizotypal individuals or first-degree relatives of schizophrenia patients. A valid endophenotype should thus be detected in these populations. Study I investigated reliability, namely internal consistency and temporal stability, of eye movements in healthy individuals. Study II utilised first-episode psychosis patients and healthy controls, aiming to detect behavioural oculomotor deficits in the absence of secondary confounds that may be encountered in chronic schizophrenia. Study III assessed performance in siblings discordant for schizophrenia. Study IV explored the relationship between psychometric schizotypy and oculomotor performance. Study V examined possible state effects of procyclidine, an anticholinergic compound often administered to schizophrenia patients, on performance in a patient group. The results generally confirmed the validity of the SPEM and antisaccade deficits as schizophrenia spectrum endophenotypes: Oculomotor performance was mostly stable both within and between assessments. SPEM and antisaccade impairments were observed in first­episode psychosis patients and schizophrenia patients and their healthy siblings. Antisaccade, but not SPEM, impairments were associated with high levels of schizotypy. State effects of procyclidine on SPEM and antisaccade performance were observed, suggesting the need to consider the influence of pharmacological treatment in future patient studies. These findings suggest that SPEM and antisaccade deficits may be studied profitably as endophenotypes in schizophrenia spectrum research.
Observation of a superradiant Mott insulator in the Dicke-Hubbard model
Creators: name: Klinder, J.
name: Keßler, H.
name: Bakhtiari, M. Reza
name: Thorwart, M.
name: Hemmerich, A.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: It is well known that the bosonic Hubbard model possesses a Mott insulator phase. Likewise, it is known that the Dicke model exhibits a self-organized superradiant phase. By implementing an optical lattice inside of a high finesse optical cavity both models are merged such that an extended Hubbard model with cavity-mediated infinite range interactions arises. In addition to a normal superfluid phase, two superradiant phases are found, one of them coherent and hence superfluid and one incoherent Mott insulating.
description: 5 pages, 3 figures
Model independent constraints on four-lepton operators
Creators: name: Falkowski, Adam
name: Mimouni, Kin
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We obtain constraints on four-lepton interactions in the effective field theory with dimension-6 operators. To this end, we combine the experimental input from Z boson measurements in LEP-1, W boson mass and decays, muon and tau decays, lepton pair production in LEP-2, neutrino scattering on electrons, and parity violating electron scattering. The analysis does not rely on any assumptions about the flavor structure of the dimension-6 operators. Our main results are the confidence intervals for Wilson coefficients of 16 lepton-flavor conserving four-lepton operators, together with the full correlation matrix. Consequences for leptophilic models beyond the Standard Model are discussed.
description: 26 pages; v2: refs added, discussion of Michel parameters extended
Regulatory Costs: Who Pays in the End? Residential Developers' 'Rule of Thumb' and the Incidence of Regulatory Costs
Creators: name: Luger, Michael I.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 1999

description: Since the turn of the century, governments have placed restrictions on the location and characteristics of new buildings, the primary reason being the recognition that new construction created negative side-effects for surrounding residents.' Consequently, it is difficult for most housing analysts to advocate eliminating all government regulations relating to housing production. However, there is disagreement among housing policy observers about what level of regulations is socially desirable. The key task of researchers is to establish the costs of regulation so that the benefits of these regulations, which accrue both to the home buyer and residents of the larger neighborhood, can be compared to the costs incurred by housing consumers. Therefore, proper measurement of regulation costs is an essential element of any policy debate surrounding regulatory reform of the housing development process.
Is North Carolina Ready for Community-Based Corrections?
Creators: name: Sandorf, Marilyn
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 1975

description: The concept of rehabilitation of criminal offenders in prisons seems to be an unrealistic ideal based on simplistic assumptions about causes of crime and a view of crime as a symptom of illness under the medical model that calls for diagnosis and treatment. In summary, there seems little hope for rehabilitation within any prison program because of the influences of the prison environment on the offender. The prospect for rehabilitation may be better outside the prison setting if more careful planning, greater commitment to realistic rehabilitation approaches, and perhaps a greater willingness to take calculated risks on behalf of convicted offenders are part of the rehabilitation effort. The crucial question is who cares about rehabilitating criminals. Traditionally, society's primary concern has been to separate the offender from the community for the protection of ourselves and our property. In general, society does not care about convicted criminals and has been unwilling to invest funds in appropriate facilities or in modern programs.
Parallel faceted imaging in radio interferometry via proximal splitting (Faceted HyperSARA): I. Algorithm and simulations
Creators: name: Thouvenin, Pierre-Antoine
name: Abdulaziz, Abdullah
name: Dabbech, Arwa
name: Repetti, Audrey
name: Wiaux, Yves
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Image and Video Processing (eess.IV)
subject: Signal Processing (eess.SP)
subject: FOS: Physical sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Upcoming radio interferometers are aiming to image the sky at new levels of resolution and sensitivity, with wide-band image cubes reaching close to the Petabyte scale for SKA. Modern proximal optimization algorithms have shown a potential to significantly outperform CLEAN thanks to their ability to inject complex image models to regularize the inverse problem for image formation from visibility data. They were also shown to be parallelizable over large data volumes thanks to a splitting functionality enabling the decomposition of the data into blocks, for parallel processing of block-specific data-fidelity terms involved in the objective function. Focusing on intensity imaging, the splitting functionality is further exploited in this work to decompose the image cube into spatio-spectral facets, and enable parallel processing of facet-specific regularization terms in the objective function, leading to the "Faceted HyperSARA" algorithm. Reliable heuristics enabling an automatic setting of the regularization parameters involved in the objective are also introduced, based on estimates of the noise level, transferred from the visibility domain to the domains where the regularization is applied. Simulation results based on a MATLAB implementation and involving synthetic image cubes and data close to Gigabyte size confirm that faceting can provide a major increase in parallelization capability when compared to the non-faceted approach (HyperSARA).
description: Published in MNRAS
Langevin dynamic for the 2D Yang-Mills measure
Creators: name: Chandra, Ajay
name: Chevyrev, Ilya
name: Hairer, Martin
name: Shen, Hao
Publisher: name: arXiv
Year: 2020
Subjects: subject: Probability (math.PR)
subject: Mathematical Physics (math-ph)
subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We define a natural state space and Markov process associated to the stochastic Yang-Mills heat flow in two dimensions. To accomplish this we first introduce a space of distributional connections for which holonomies along sufficiently regular curves (Wilson loop observables) and the action of an associated group of gauge transformations are both well-defined and satisfy good continuity properties. The desired state space is obtained as the corresponding space of orbits under this group action and is shown to be a Polish space when equipped with a natural Hausdorff metric. To construct the Markov process we show that the stochastic Yang-Mills heat flow takes values in our space of connections and use the "DeTurck trick" of introducing a time dependent gauge transformation to show invariance, in law, of the solution under gauge transformations. Our main tool for solving for the Yang-Mills heat flow is the theory of regularity structures and along the way we also develop a "basis-free" framework for applying the theory of regularity structures in the context of vector-valued noise - this provides a conceptual framework for interpreting several previous constructions and we expect this framework to be of independent interest.
description: 141 pages. Revised according to referee reports. Added figures in Section 3. Accepted for publication in Publ. Math. IH\'ES
1994 Weiss Competition Winner
Creators: name: Cashman, Jason C.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 1995

description: As a submission to this juried event, I presented a painting which I consider to be non-titled, rather than "untitled." This piece, rather than merely reflecting Urban Livability, is a manifestation of"Urban Live-Ability;" it is a conglomeration of accidents, reflections, moods, and syntheses of visual images and auditory disturbances along with secondary perceptions of tastes, touches, and smells, which are experienced and perceived in an urban environment. As these forms breathe, move, act, sing, and dance through and in their environments, they break down the boundaries of Art and Life by means of extending experience rather than existing as mere duplications of Life.
Book Review: The Good Jobs Strategy
Creators: name: Stern, Julianne
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2015

description: Zeynep Ton’s The Good Jobs Strategy is a critical resource for workforce development practitioners and economic developers who are interested in growing the number of “high road” jobs in their communities – jobs that offer a family-sustaining wage and opportunities for advancement, and in which workers are empowered to make decisions with some degree of autonomy. One way to grow the number of high road jobs in your community is to attract new businesses that already offer good jobs. But another critical strategy that economic developers can use to improve the job structure in their communities is to work closely with existing small and medium businesses to help them offer high road jobs.
Does linking responses with items reduce interference in visual working memory?
Creators: name: Daghlian, Marcus
Publisher: name: Open Science Framework
Year: 2022

description: Previous studies on working memory have found that performance in working memory tasks is worse when the number of items to remember increases. This may be partly due to interference effects (i.e. influence of the nontarget item). In this study we are investigating whether interference effects between memorized items are reduced when the items are recalled using different effectors. This could show that working memory may be tied to response preparation more tightly than previously thought, and that this may influence working memory capacity estimates.
Fairness in machine learning: against false positive rate equality as a measure of fairness
Creators: name: Long, Robert
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computers and Society (cs.CY)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: As machine learning informs increasingly consequential decisions, different metrics have been proposed for measuring algorithmic bias or unfairness. Two popular fairness measures are calibration and equality of false positive rate. Each measure seems intuitively important, but notably, it is usually impossible to satisfy both measures. For this reason, a large literature in machine learning speaks of a fairness tradeoff between these two measures. This framing assumes that both measures are, in fact, capturing something important. To date, philosophers have not examined this crucial assumption, and examined to what extent each measure actually tracks a normatively important property. This makes this inevitable statistical conflict, between calibration and false positive rate equality, an important topic for ethics. In this paper, I give an ethical framework for thinking about these measures and argue that, contrary to initial appearances, false positive rate equality does not track anything about fairness, and thus sets an incoherent standard for evaluating the fairness of algorithms.
On the Greedy Algorithm for the Shortest Common Superstring Problem with Reversals
Creators: name: Fici, Gabriele
name: Kociumaka, Tomasz
name: Radoszewski, Jakub
name: Rytter, Wojciech
name: Waleń, Tomasz
Publisher: name: arXiv
Year: 2015
Subjects: subject: Data Structures and Algorithms (cs.DS)
subject: FOS: Computer and information sciences

description: We study a variation of the classical Shortest Common Superstring (SCS) problem in which a shortest superstring of a finite set of strings $S$ is sought containing as a factor every string of $S$ or its reversal. We call this problem Shortest Common Superstring with Reversals (SCS-R). This problem has been introduced by Jiang et al., who designed a greedy-like algorithm with length approximation ratio $4$. In this paper, we show that a natural adaptation of the classical greedy algorithm for SCS has (optimal) compression ratio $\frac12$, i.e., the sum of the overlaps in the output string is at least half the sum of the overlaps in an optimal solution. We also provide a linear-time implementation of our algorithm.
description: Published in Information Processing Letters
Lophiotoma vezzaroi Cossignani 2015
Creators: name: Puillandre, Nicolas
name: Fedosov, Alexander E.
name: Zaharias, Paul
name: Aznar-Cormano, Laetitia
name: Kantor, Yuri I.
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Mollusca
Gastropoda
Neogastropoda
Turridae
Lophiotoma
Lophiotoma vezzaroi

description: LOPHIOTOMA VEZZAROI COSSIGNANI, 2015
(FIG. 9F–G)
Lophiotoma abbreviata. – Okutani, 2000: pl. 313, fig. 54 (not of Reeve, 1843).
Lophiotoma cf. ruthveniana Melvill, 1923. – Poppe, 2008: pl. 683, fig. 4.
Lophiotoma vezzaroi Cossignani, 2015: 30–31, text figs.
Type material: Holotype MMM – Cupra Marittima.
Type locality: New Place Birat Samal Island, Philippines. Tangle net at 100–200 m.
Material examined: Three specimens sequenced (Table S1), one specimen Tinina Balut Island, Philippines, tangle net at 100– 200 m.
Diagnosis: Shell medium sized (up to 39 mm), turriform, with prominent spiral sculpture; shell coloured with dense irregularly shaped brown to dark brown spots, siphonal canal off-white to tan. Whorl outline moderately convex, angulated at sinus. Sinus cords paired, subequal in size, with narrow interspace. Subsutural ramp and shell base sculptured with varying in width and prominence cords and finer riblets. Shell base convex, strongly constricted to rather slender siphonal canal, sculptured with dense spiral to oblique cords. Aperture elongate, anal sinus moderately deep, wide, angulated at tip. Aperture distinctly lirate inside. Radula examined in one poorly preserved specimen from Tinina, Balut Island (Fig. 9G), in all respects similar to other studied herein species of Lophiotoma.
Remarks: The species was confused previously with Lophiotoma ruthveniana. Okutani (2000) illustrated a specimen very similar to Lophiotoma abbreviata. Although described from the Philippines, our material and the record of Okutani suggest that its distribution extends from Japan to Papua New Guinea and Vanuatu from 10 to 15 to more than 100 m depth.
Distribution: Vanuatu (sequenced specimens), Japan, Philippines and Papua New Guinea.
description: Published as part of Puillandre, Nicolas, Fedosov, Alexander E., Zaharias, Paul, Aznar-Cormano, Laetitia & Kantor, Yuri I., 2017, A quest for the lost types of Lophiotoma (Gastropoda: Conoidea: Turridae): integrative taxonomy in a nomenclatural mess, pp. 243-271 in Zoological Journal of the Linnean Society 181 on page 267
2005 DCRP Best Master's Project: Challenges and Feasibility of Rural Arts-Based Economic Development: A Case Study of Chatham County, North Carolina
Creators: name: Fleming, Rachel C.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2006

description: The following is an adapted excerpt from a longer paper by Rachel Fleming. The complete essay was winner of the 2005 DCRP Best Master’s Project. In recent years, economic development practitioners and planners have begun to recognize the role of the arts in regional economies and their use in downtown revitalization and other aspects of economic sustainability, particularly for rural areas and small towns. However, challenges in facilitating arts-based economic development strategies are not well documented or understood. This report examines Chatham County, North Carolina, and its residents’ attempts to create and envision arts-based economic development strategies. Challenges were identified, including unclear roles for arts support organizations, disagreements about government subsidies, difficulties in weighing the costs and benefits of an arts-based strategy versus other methods of economic or community development, obstacles (perceived and real) for local government and organizations in working with artists, and historic divisions based on race, class, and politics. Strategies to mediate these challenges are suggested.
Dynamic mmWave Channel Emulation in a Cost-Effective MPAC with Dominant-Cluster Concept
Creators: name: Cai, Xuesong
name: Miao, Yang
name: Li, Jinxing
name: Tufvesson, Fredrik
name: Pedersen, Gert Frølund
name: Fan, Wei
Publisher: name: arXiv
Year: 2020
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Millimeter-Wave (mmWave) massive multiple-input multiple-output (MIMO) has been considered as a key enabler for the fifth-generation (5G) communications. It is essential to design and test mmWave 5G devices under various realistic scenarios, since the radio propagation channels pose intrinsic limitations on the performance. This requires emulating realistic dynamic mmWave channels in a reproducible manner in laboratories, which is the goal of this paper. In this contribution, we firstly illustrate the dominant-cluster(s) concept, where the non-dominant clusters in the mmWave channels are pruned, for mmWave 5G devices applying massive MIMO beamforming. This demonstrates the importance and necessity to accurately emulate the mmWave channels at a cluster level rather than the composite-channel level. Thus, an over-the-air (OTA) emulation strategy for dynamic mmWave channels is proposed based on the concept of dominant-cluster(s) in a sectored multiprobe anechoic chamber (SMPAC). The key design parameters including the probe number and the angular spacing of probes are investigated through comprehensive simulations. A cost-effective switchcircuit is also designed for this purpose and validated in the simulation. Furthermore, a dynamic mmWave channel measured in an indoor scenario at 28-30 GHz is presented, where the proposed emulation strategy is also validated by reproducing the measured reality.
description: Accepted by IEEE Transactions on Antennas and Propagation
Relativistic baryonic jets from an ultraluminous supersoft X-ray source
Creators: name: Liu, Ji-Feng
name: Bai, Yu
name: Wang, Song
name: Justham, Stephen
name: Lu, You-Jun
name: Gu, Wei-Min
name: Liu, Qing-Zhong
name: Di Stefano, Rosanne
name: Guo, Jin-Cheng
name: Cabrera-Lavers, Antonio
name: Alvarez, Pedro
name: Cao, Yi
name: Kulkarni, Shri
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The formation of relativistic jets by an accreting compact object is one of the fundamental mysteries of astrophysics. While the theory is poorly understood, observations of relativistic jets from systems known as microquasars have led to a well-established phenomenology. Relativistic jets are not expected from sources with soft or supersoft X-ray spectra, although two such systems are known to produce relatively low-velocity bipolar outflows. Here we report optical spectra of an ultraluminous supersoft X-ray source (ULS) in the nearby galaxy M81 (M81 ULS-1) showing blueshifted broad Hα emission lines, characteristic of baryonic jets with relativistic speeds. The time variable jets have projected velocities ~17 per cent of the speed of light, and seem similar to those in the prototype microquasar SS 433. Such relativistic jets are not expected to be launched from white dwarfs, but an origin from a black hole or neutron star in M81 ULS-1 is hard to reconcile with its constant soft X-rays. The completely unexpected presence of relativistic jets in a ULS challenges the canonical theories for jet formation, but may possibly be explained by a long speculated super-critically accreting black hole with optically thick outflows
description: Nature 528, 108-110 (03 December 2015)
On dRGT massive gravity with degenerate reference metrics
Creators: name: Cao, Li-Ming
name: Peng, Yuxuan
name: Zhang, Yun-Long
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In dRGT massive gravity, to get the equations of motion, the square root tensor is assumed to be invertible in the variation of the action. However, this condition can not be fulfilled when the reference metric is degenerate. This implies that the resulting equations of motion might be different from the case where the reference metric has full rank. In this paper, by generalizing the Moore-Penrose inverse to the symmetric tensor on Lorentz manifolds, we get the equations of motion of the theory with degenerate reference metric. It is found that the equations of motion are a little bit different from those in the non-degenerate cases. Based on the result of the equations of motion, for the $(2+n)$-dimensional solutions with the symmetry of $n$-dimensional maximally symmetric space, we prove a generalized Birkhoff theorem in the case where the degenerate reference metric has rank $n$, i.e., we show that the solutions must be Schwarzschild-type or Nariai-Bertotti-Robinson-type under the assumptions.
description: v1, Latex, 29 pages, no figures; v2, references added, typos corrected, 30 pages
Preservation Planning for Archaeological Resources at the University of North Carolina
Creators: name: Samford, Patricia M.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 1993

description: In a recent article on campus planning, the journal Architecture summarized some of the current issues facing academic institutions, forecasting that indicators of declining enrollment in the 1990s have made college administrators eager to improve their facilities as a means of attracting students (Anonymous 1991:37). This improvement often entails the construction of new buildings, particularly science and technology centers. While monographs and articles on university planning generally stress the need for master plans which take into account factors such as projected growth, costs, effective land management, visual uniqueness, and transportation (Dober 1992, Freeman et al., 1992, Junker 1990), preservation planning often receives little more than lip service. Pointing out this obvious oversight, Stephen Chambers (1990) has addressed the need for preserving structures, green spaces and archaeological resources of historical significance in his recent article on university preservation planning. While structures deemed to be of historic significance to academic institutions are more likely to receive consideration by university planners, archaeological resources are rarely given any attention. Preservation planning became an important concept in the early 1980s, under encouragement by federal agencies concerned with cultural resource planning at the state level (Heritage Conservation and Recreation Service, 1980). The model outlined by the Heritage Conservation and Recreation Service called for the creation of state resource protection plans which identify important cultural resources, formulate research objectives, and create operating plans which make specific recommendations for managing these resources. Although intended for a broader level of planning, the same model could be applied to preservation planning at a university level. This paper will demonstrate how this approach could be applied at the University of North Carolina at Chapel Hill, by showing how a project currently underway there could be expanded into a preservation plan for archaeological resources on University- owned land.
Code of burst-and-coast gait assembly numerical approach
Creators: name: Gen Li
name: Thiria, Benjamin
name: Lechenault, Frederic
name: François, Bill
name: Kolomenskiy, Dmitry
name: Godoy-Diana, Ramiro
name: Ashraf, Intesaaf
Publisher: name: Open Science Framework
Year: 2022

description: This is an example code of burst-and-coast assembly by Li et al,2020. "Burst-and-coast swimmers optimize gait by adapting unique intrinsic cycle" We developed this code to generate an arbitrary burst-and-coast swimming gait in a four-dimensional parameter space based on CFD simulation results. The parameters are: 1) the frequency of the burst phase fb, 2) the amplitude of the burst phase Ab, 3) the upper speed bound UU (the speed at which the fish stops bursting and starts coasting) and 4) and lower speed bound UL (the speed at which fish stops coasting and starts bursting, UL < UU). The code searches across this parameter space for an optimal burst-and-coast swimming gait that guarantees sustained swimming with some specified speed U at the lowest cost of transport CoT . Note that, this example code provides only demonstration of code structure, rather than result with accuracy. The resolutions in the example database and 4-dimensional scans are much reduced for efficient demonstration. The code cannot be run solely without CFD data input.
ESiWACE Newsletter 12/2017
Creators: name: Neumann, Philipp
name: Guglielmo, Francesca
Publisher: name: Zenodo
Year: 2017
Subjects: Earth system model
exa-scale
climate
weather
hpc
ESiWACE

description: To subscribe to/unsubscribe from this newsletter, please visit: https://lists.dkrz.de/mailman/listinfo/esiwace-external
 You find further details on ESiWACE at www.esiwace.eu All newsletters are also available at www.esiwace.eu/newsletter
 ESiWACE focuses on preparing Earth system models and tools for the exa-scale, and on supporting the weather and climate modelling communities to operate these models efficiently on a variety of HPC systems. The key target is to prepare global cloud and ocean eddy resolving simulations at 1km scale and at a rate of 1 simulated year per calendar day. This will allow breaking down some of the greatest scientific challenges thanks to better predictions of climate trend, and it will result in much more fidelity in the representation of high-impact regional weather and climate events.
description: The ESiWACE project has received funding from the European Union's Horizon 2020 Research and Innovation Programme under Grant Agreement No 675191
A Bound Violation on the Galaxy Group Scale: The Turn-Around Radius of NGC 5353/4
Creators: name: Lee, Jounghun
name: Kim, Suk
name: Rey, Soo-Chang
Publisher: name: arXiv
Year: 2015
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The first observational evidence for the violation of the maximum turn-around radius on the galaxy group scale is presented. The NGC 5353/4 group is chosen as an ideal target for our investigation of the bound-violation because of its proximity, low-density environment, optimal mass scale, and existence of a nearby thin straight filament. Using the observational data on the line-of-sight velocities and three-dimensional distances of the filament galaxies located in the bound zone of the NGC 5353/4 group, we construct their radial velocity profile as a function of separation distance from the group center and then compare it to the analytic formula obtained empirically by Falco et al. (2014) to find the best-fit value of an adjustable parameter with the help of the maximum likelihood method. The turn-around radius of NGC 5353/4 is determined to be the separation distance where the adjusted analytic formula for the radial velocity profile yields zero. The estimated turn-around radius of NGC 5353/4 turns out to substantially exceed the upper limit predicted by the spherical model based on the LambdaCDM cosmology. Even when the restrictive condition of spherical symmetry is released, the estimated value is found to be only marginally consistent with the LambdaCDM expectation.
description: Published in ApJ, matched to the published version, 6 figures, 1 table
Putting Visual Impact Assessment to Work
Creators: name: Fischman, Gail
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 1986

description: Coastal communities, especially those under substantial development pressure, are becoming increasingly aware of the need to preserve unique visual resources. The purpose of this article is twofold. First, it reviews key studies which advance methodologies for incorporating visual impact techniques into an area's land use planning guidance system. Second, it evaluates these studies in terms of their ability to effectively and efficiently define, quantify, analyze and utilize visual resource information.