cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Ising Machines' Dynamics and Regularization for Near-Optimal Large and Massive MIMO Detection
Creators: name: Singh, Abhishek Kumar
name: Jamieson, Kyle
name: Venturelli, Davide
name: McMahon, Peter
Publisher: name: arXiv
Year: 2021
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: Optimal MIMO detection has been one of the most challenging and computationally inefficient tasks in wireless systems. We show that the new analog computing techniques like Coherent Ising Machines (CIM) are promising candidates for performing near-optimal MIMO detection. We propose a novel regularized Ising formulation for MIMO detection that mitigates a common error floor problem and further evolves it into an algorithm that achieves near-optimal MIMO detection. Massive MIMO systems, that have a large number of antennas at the Access point (AP), allow linear detectors to be near-optimal. However, the simplified detection in these systems comes at the cost of overall throughput, which could be improved by supporting more users. By means of numerical simulations, we show that in principle a MIMO detector based on a hybrid use of a CIM would allow us to add more transmitter antennas/users and increase the overall throughput of the cell by a significant factor. This would open up the opportunity to operate using more aggressive modulation and coding schemes and hence achieve high throughput: for a $16\times16$ large MIMO system, we estimate around 2.5$\times$ more throughput in mid-SNR regime ($\approx 12 dB$) and 2$\times$ more throughput in high-SNR regime( $>$ 20dB) than the industry standard, Minimum-Mean Square Error decoding (MMSE).
description: Accepted for IEEE Transactions on Wireless Communication
Integrability of Smooth Wilson Loops in N=4 Superspace
Creators: name: Beisert, Niklas
name: Muller, Dennis
name: Plefka, Jan
name: Vergu, Cristian
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We perform a detailed study of the Yangian symmetry of smooth supersymmetric Maldacena-Wilson loops in planar N=4 super Yang-Mills theory. This hidden symmetry extends the global superconformal symmetry present for these observables. A gauge-covariant action of the Yangian generators on the Wilson line is established that generalizes previous constructions built upon path variations. Employing these generators the Yangian symmetry is proven for general paths in non-chiral N=4 superspace at the first perturbative order. The bi-local piece of the level-one generators requires the use of a regulator due to divergences in the coincidence limit. We perform regularization by point splitting in detail, thereby constructing additional local and boundary contributions as regularization for all level-one Yangian generators. Moreover, the Yangian algebra at level one is checked and compatibility with local kappa-symmetry is established. Finally, the consistency of the Yangian symmetry is shown to depend on two properties: The vanishing of the dual Coxeter number of the underlying superconformal algebra and the existence of a novel superspace "G-identity" for the gauge field theory. This tightly constrains the conformal gauge theories to which integrability can possibly apply.
description: 44 pages, 2 figures. v2: small comments added, version to be published in JHEP
Correlation detection in trees for planted graph alignment
Creators: name: Ganassali, Luca
name: Massoulié, Laurent
name: Lelarge, Marc
Publisher: name: arXiv
Year: 2021
Subjects: subject: Data Structures and Algorithms (cs.DS)
subject: Machine Learning (cs.LG)
subject: Probability (math.PR)
subject: Statistics Theory (math.ST)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: Motivated by alignment of correlated sparse random graphs, we introduce a hypothesis testing problem of deciding whether or not two random trees are correlated. We obtain sufficient conditions under which this testing is impossible or feasible. We propose MPAlign, a message-passing algorithm for graph alignment inspired by the tree correlation detection problem. We prove MPAlign to succeed in polynomial time at partial alignment whenever tree detection is feasible. As a result our analysis of tree detection reveals new ranges of parameters for which partial alignment of sparse random graphs is feasible in polynomial time. We then conjecture that graph alignment is not feasible in polynomial time when the associated tree detection problem is impossible. If true, this conjecture together with our sufficient conditions on tree detection impossibility would imply the existence of a hard phase for graph alignment, i.e. a parameter range where alignment cannot be done in polynomial time even though it is known to be feasible in non-polynomial time.
description: 38 pages, 9 figures
Into a box interiors: clutch size variation and resource allocation in the European pond turtle
Creators: name: Zuffi, Marco A.L.
name: Citi, Simona
name: Foschi, Elena
name: Marsiglia, Francesca
name: Martelli, Eva
Publisher: name: Acta Herpetologica
Year: 2015

description: In order to highlight the temporal dynamics of different stages of follicula distribution on reproductive output, we analysed the female size and the reproductive frequency of the European pond turtle, Emys orbicularis, using 191 ultrasonographic and 67 x-ray images (collected from 2000 to 2011 in two different localities of a coastal plain area of NorthWestern Italy). To compare digital image results we also used anatomical topography of autopsied females. Although reproductive females were significantly longer in one locality and larger in the second one, clutch size did not differ between localities. Two main clutches were produced during a year, with occasionally a third one. Shelled eggs were frequent in May, June and July, while follicula were present till August, with a decrease in follicular size especially in July and August. Despite the presence of a number of follicles in late summer and in autumn, a third expected clutch was only an exceptional event, differently from what happens in other sites of the species’ distribution range. The permanence of follicles after the last deposition is interpreted as a possible extra energy source during the very hot and dry summers of coastal central Italy and for the hibernating phase.
description: Acta Herpetologica, Vol 10 No 1 (2015)
title: Geoscience and Society
Creators: name:  Bücker, Christian
name:  Hilgers, Christoph
name:  Schilling, Frank
Publisher: name: Deutsche Geologische Gesellschaft - Geologische Vereinigung e.V. (DGGV)
Year: 2021

description: Climate, energy transition, raw material supply, underground storage are socially relevant topics that require geoscientific expertise but are not associated with the geosciences. How do you bring topics from the geosciences into society? Geohazards such as earthquakes, landslides, tsunamis, floods and volcanic eruptions are high-profile issues that geoscience experts contribute to in the media. Geoscientists in geoparks also develop active communication strategies to present geoscientific phenomena to society. The session will highlight ways in which the topics of climate, energy transition, raw material supply and underground storage can be linked to the geosciences in society.
Collective smart innovations and corporate governance models in Italian wine cooperatives: the opportunities of the farm-to-fork strategy
Creators: name: Nazzaro, Concetta
name: Stanco, Marcello
name: Uliano, Anna
name: Lerro, Marco
name: Marotta, Giuseppe
name: Nazzaro, Concetta
name: Stanco, Marcello
name: Uliano, Anna
name: Lerro, Marco
name: Marotta, Giuseppe
Publisher: name: Unknown
Year: 2022
Subjects: subject: Agricultural and Food Policy
subject: Research and Development/Tech Change/Emerging Technologies
subject: innovation
subject: sustainability
subject: cooperatives
subject: governance
subject: value creation

description: European policies, especially the ‘farm-to-fork strategy’, address the challenge posed by the ecological transition in agriculture setting up a new technological paradigm. In this context, collective smart innovations may play a crucial role, enabling to meet current citizen-consumers’ needs as well as producing positive environmental and social externalities. Lately, wineries, in the attempt to improve the sustainability of production process and the creation of competitive advantages, reoriented their investments in research and development embracing smart innovations. The latter, when supported by appropriate models of corporate governance, can facilitate business decisions and create shared value. Despite its relevance, literature on the topic is still scarce. This study aims to investigate the role played by collective smart innovations and corporate governance in the sustainable and ecological transition of wineries and, specifically, wine cooperatives. The case study methodology was adopted investigating the collective innovation ‘I mille per l’Aglianico’ implemented by the Italian wine cooperative ‘La Guardiense’. Results show that the collective smart innovation experienced by ‘La Guardiense’ had impacts in terms of internal economies, such as increase in sales and costs reduction; and in terms of external social economies, such as local development and environmental protection.
Hoffmannia viridis Rusby
Creators: name: MONRO, A. K.
name: SANTAMARÍA-AGUILAR, D.
name: GONZÁLEZ, F.
name: CHACÓN, O.
name: SOLANO, D.
name: RODRÍGUEZ, A.
name: ZAMORA, N.
name: FEDELE, E.
name: CORREA, M.
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Gentianales
Rubiaceae
Hoffmannia
Hoffmannia viridis

description: Hoffmannia viridis Rusby
Terrestrial herbs to shrubs. Distribution in PILA 100–1500
 m, low elevation mixed forest, mixed forest in transition to low elevation forest, mixed forest in transition to cloud forest. Global distribution: Nicaragua to Peru. Records: A.K. Monro 4750 (BM, INB, MO), A. De Sedas 677 (INB, PMA), D. Santamaría 7439 (INB, PMA).
description: Published as part of MONRO, A. K., SANTAMARÍA-AGUILAR, D., GONZÁLEZ, F., CHACÓN, O., SOLANO, D., RODRÍGUEZ, A., ZAMORA, N., FEDELE, E. & CORREA, M., 2017, A first checklist to the vascular plants of La Amistad International Park (PILA), Costa Rica-Panama, pp. 448-450 in Phytotaxa 322 (1) on pages 448-450, DOI: 10.11646/phytotaxa.322.1.1, http://zenodo.org/record/13698397
A cost-effectiveness study the Latin American and Iberian Serial Exchange Program at the University of North Carolina at Chapel Hill
Creators: name: Marsicek, Catherine
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 1999
Subjects: Serial publications-Subscriptions
University of North Carolina at Chapel Hill--Libraries
Exchange of books, periodicals, etc.-Time and cost studies
College and university libraries--Serial publications

description: This study determines the cost-effectiveness of acquiring Latin American and Iberian serials through exchange programs at the University of North Carolina at Chapel Hill. By weighing the cost of the serials and personnel needed to maintain the program against the financial value of the items received, the Latin American and Iberian serial exchange program was found to require more resources than it provides. The overall results of the data indicate a skewed financial advantage favoring the foreign universities, institutions and organizations. Recommendations are made to eliminate the ineffective parts of the program or to dedicate staff and resources to streamline the program.
Temperature-dependent cross sections for charmonium dissociation in collisions with kaons and eta mesons in hadronic matter
Creators: name: Ji, Shi-Tao
name: Shen, Zhen-Yu
name: Xu, Xiao-Ming
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We study kaon-charmonium and eta-charmonium dissociation reactions. The K-charmonium dissociation and the eta-charmonium dissociation include 27 reactions. Cross sections for the reactions are calculated in the Born approximation, in the quark-interchange mechanism and with a temperature-dependent quark potential. The temperature dependence of peak cross sections of endothermic reactions is linked to the temperature dependence of quark-antiquark relative-motion wave functions, meson masses and the quark potential. Although the eta meson and kaon have similar masses, the energy and temperature dependence of the eta-charmonium dissociation cross sections are quite different from those of the K-charmonium dissociation cross sections. Using the eta-charmonium and pion-charmonium dissociation cross sections, we calculate the ratio of the corresponding dissociation rates in hadronic matter and we find that such rates are comparable at low J/psi momenta.
description: 54 pages, 29 figures, 6 tables
Extraction of Natural-Language Dates and Comparison of Dates in Hypothesis and Text to Identify Negative Textual Entailment
Creators: name: Orphanides, Andreas K.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2008
Subjects: Text mining--Temporal information
Natural language processing
Text mining--Textual entailment

description: We present a system to determine entailment, when a sentence (the text) implies a second sentence (the hypothesis). While some systems use temporal information to decide entailment, no study has measured the effectiveness of temporal features alone in entailment resolution. The system identifies natural-language dates, and precludes entailment solely by comparing dates in the hypothesis and text. Evaluation of date detection on three 800-pair corpora from the Recognising Textual Entailment (RTE) Challenges provided precision of 98.0% (RTE3devmt, 338/345), 96.6% (RTE3test, 198/205), and 99.7% (RTE1test, 336/337), and recall of 97.7% (RTE3devmt, 338/346), 99.0% (RTE3test, 198/200), and 99.1% (RTE1devmt 336/339). For sentence pairs with years, the proposed method improved entailment accuracy from 33 to 42/72 (RTE3devmt) and from 42 to 44/63 (RTE3test,) which corresponds to an overall improvement of 1.1% (RTE3devmt) and 0.1% (RTE3test). Our analysis suggests that matching temporal information with an event would further increase the entailment accuracy.
Haplotype variation in founders of the Mauremys annamensis population kept in European Zoos
Creators: name: Somerova, Barbora
name: Rehák, Ivan
name: Velenský, Petr
name: Palupčíková, Klára
name: Protiva, Tomáš
name: Frynta, Daniel
Publisher: name: Acta Herpetologica
Year: 2015

description: The critically endangered Annam leaf turtle Mauremys annamensis faces extinction in nature. Because of that, the conservation value of the population kept in European zoos becomes substantial for reintroduction programmes. We sampled 39 specimens of M. annamensis from European zoos and other collections (mainly founders, imports and putatively unrelated individuals), and also four specimens of Mauremys mutica for comparison. In each animal, we sequenced 817 bp of the mitochondrial ND4 gene and 940 bp of the nuclear R35 intron that were used as phylogenetic markers for Mauremys mutica-annamensis group by previous authors. The sequences of the R35 intron, which are characteristic for M. annamensis and which clearly differ from those characteristic for M. mutica and/or other Mauremys species, were mutually shared by all of the examined M. annamensis. They also possessed mitochondrial haplotypes belonging to the annamensis subclades I and II, distinctness of which was clearly confirmed by phylogenetic analyses. Thus, both nuclear and mitochondrial markers agreed in the unequivocal assignment of the examined individuals to M. annamensis. Although no obvious hybrids were detected within the founders of the captive population, further careful genetic evaluation using genom-wide markers is required to unequivocally confirm this result.
description: Acta Herpetologica, Vol 10 No 1 (2015)
Final State Gluon Emission in Deep-Inelastic Scattering at Next-to-Leading Twist
Creators: name: Sirimanna, Chathuranga
name: Cao, Shanshan
name: Majumder, Abhijit
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: A detailed reanalysis of the single gluon emission rate at next-to-leading twist is carried out. As was the case in prior efforts, the problem is cast in the framework of deep-inelastic scattering (DIS) of an electron off a large nucleus. The quark produced in the interaction propagates through the remaining nucleus and engenders scattering and gluon radiation, which is calculated in the limit of one re-scattering. This medium induced single gluon emission rate forms the basis of several energy loss calculations in both DIS and heavy-ion collisions. Unlike prior efforts, a complete transverse momentum gradient expansion of the hadronic tensor, including $N_c$ suppressed terms, phase terms and finite gluon momentum fraction terms, ignored previously, is carried out. These terms turn out to be surprisingly large. In contrast to prior efforts, the full next-to-leading twist gluon emission kernel is found to be positive definite and slowly increasing with the exchanged transverse momentum. Phenomenological consequences of these new contributions are discussed.
description: 24 pages, 26 figures
Sherds catalogue for the Għar Dalam and Skorba phases: The MaltaPot project (MPotCatalogueGDS2023v1)
Creators: name: Richard-Trémeau, Emma
name: Brogan, Catriona
name: Betts, John Charles
Publisher: name: Zenodo
Year: 2023
Subjects: Pottery
Neolithic
Catalogue
Archaeology
Maltese Islands

description: This catalogue was compiled as part of the MaltaPot project at the University of Malta. This project aims to understand better the nature of the materials used in Neolithic Malta, mainly dating to the Għar Dalam, Skorba (Early Neolithic), and Zebbuġ (Late Neolithic) phases. This catalogue presents sherds from the Għar Dalam and Skorba phases, photographs, microphotographs, and descriptions of sherds and their archaeological contexts. This catalogue was prepared thanks to the information from the National Museum of Archaeology (NMA), Malta, and the FRAGSUS project. The project used multiple techniques to characterise the pottery sherds, such as microscopy, polarised light microscope, X-Ray Fluorescence or X-Ray Diffraction. Although the results of these analyses await publication, this catalogue presents the sherds which were analysed using these destructive techniques to provide comparative material whilst safeguarding information about the characteristics of these sherds which have been partially destroyed. This catalogue was compiled in 2023. Data collection was carried out between 2018-2020 and 2023. This catalogue was compiled in 2023. Data collection was carried out between 2018-2020 and 2023. This document is a PDF document; to access the original photographs and data, please email the authors.
Exciton condensation in an extended spinless Falicov Kimball model in the presence of orbital magnetic fields
Creators: name: Pradhan, S.
name: Taraphder, A.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences
subject: 00A79

description: An extended, spinless Falicov-Kimball model in the presence of perpendicular magnetic field is investigated employing Hartree-Fock self-consistent mean-field theory in two dimensions. In the presence of an orbital field the hybridization-dependence of the excitonic average ${ Δ=}$ is modified. The exciton responses in subtle different ways for different chosen values of the magnetic flux consistent with Hofstadter's well-known spectrum. The excitonic average is suppressed by the application of magnetic field. We further examine the effect of Coulomb interaction and $f$-electron hopping on the condensation of exciton for some rational values of the applied magnetic field. The interband Coulomb interaction enhances the $Δ$ exponentially, while a non-zero $f$-electron hopping reduces it. A strong commensurability effect of the magnetic flux on the behaviour of the excitons is observed.
description: 6 pages, 5 figures
Where to “Rock”? Choice of retreat sites by a gecko in a semi-arid habitat
Creators: name: Penado, Andreia
name: Rocha, Ricardo
name: Sampaio, Marta
name: Gil, Vanessa
name: Carreira, Bruno
name: Rebelo, Rui
Publisher: name: Acta Herpetologica
Year: 2015

description: The Selvagens gecko (Tarentola boettgeri bischoffi Joger, 1984) is a medium sized gecko endemic to the Selvagens archipelago, Madeira, Portugal. The biology of this gecko is poorly known and in this study we present the first evidence regarding its habitat use. In 2010 (spring and autumn) and 2011 (spring), we collected data on the characteristics of the habitat surrounding 168 rocks used by these geckos as retreat sites, as well as on 75 randomly selected rocks. We also recorded body measurements of the individuals caught under each rock. In both seasons retreat site occupancy was found to be related to rock area, with geckos being found mainly under large rocks. Interestingly, we found that in spring heavier males, in better body condition, occupied the largest rocks and larger geckos occupied rocks closer to creek beds. Our results shed some light upon the behavioural ecology of this nocturnally active ectotherm, that spends the day under a retreat site: i) intraspecific competition may be an ecological factor prevalent in this species, since larger individuals occupy larger rocks, located in a presumably high quality micro-habitat; ii) the possibility of spring territoriality in males, that compete for good quality shelters.
description: Acta Herpetologica, Vol 10 No 1 (2015)
An analysis of IP Telephony Signaling using the Session Initiation Protocol (SIP)
Creators: name: Alumbaugh, James R.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2000
Subjects: Information networks
Packet switching
Client server computing
Telecommunications

description: This paper examines both the emergence of IP telephony in the telecommunications industry and the Session Initiation Protocol (SIP) as a method for providing signaling services for IP telephony networks.  The technical as well as cost advantages of IP telephony are addressed and the various SIP components, addressing mechanisms, protocol messages, and protocol functionality are discussed.  The technical benefits of SIP are examined and a brief comparison is made between SIP and H.323, an ITU umbrella specification and a leading alternative to SIP.  SIP and the latest version of H.323 are found to be relatively comparable, although due to the inherent simplicity in developing SIP implementations and applications, SIP has the potential to challenge H.323's dominance in the IP telephony signaling market space.
Multi-party Semi-quantum Secret Sharing Protocol based on Measure-flip and Reflect Operations
Creators: name: Jian, Li
name: Ye, Chong-Qiang
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Semi-quantum secret sharing (SQSS) protocols serve as fundamental frameworks in quantum secure multi-party computations, offering the advantage of not requiring all users to possess intricate quantum devices. However, the current landscape of SQSS protocols predominantly caters to bipartite scenarios, rendering them inadequate for practical multi-party secret sharing requirements. Addressing this gap, this paper proposes a novel SQSS protocol based on multi-particle GHZ states. In this protocol, the quantum user distributes predetermined secret information to multiple classical users with limited quantum capabilities, necessitating collaborative efforts among all classical users to reconstruct the correct secret information. By utilizing measure-flip and reflect operations, the transmitted multi-particle GHZ states can all contribute keys, thereby improving the utilization of transmitted particles. Security analysis shows that the protocol's resilience against prevalent external and internal threats. Additionally, employing IBM Qiskit, we conduct quantum circuit simulations to validate the protocol's accuracy and feasibility. Compared with similar studies, the proposed protocol has advantages in terms of protocol scalability, qubit efficiency, and shared message types.
description: 14 pages
Antonio Romano. Atlante degli anfibi del Parco Nazionale del Cilento Vallo di Diano e Alburni - Distribuzione, biologia, ecologia e conservazione
Creators: name: Salvidio, Sebastiano
Publisher: name: Acta Herpetologica
Year: 2015

description: Acta Herpetologica, Vol 10 No 1 (2015)
Two-complete stable motivic stems over finite fields
Creators: name: Wilson, Glen M.
name: Østvær, Paul Arne
Publisher: name: arXiv
Year: 2016
Subjects: subject: Algebraic Topology (math.AT)
subject: FOS: Mathematics

description: Let $\ell$ be a prime and $q = p^ν$ where $p$ is a prime different from $\ell$. We show that the $\ell$-completion of the $n$th stable homotopy group of spheres is a summand of the $\ell$-completion of the $(n, 0)$ motivic stable homotopy group of spheres over the finite field with $q$ elements $F_q$. With this, and assisted by computer calculations, we are able to explicitly compute the two-complete stable motivic stems $π_{n, 0}(F_q)^{\wedge}_2$ for $0\leq n\leq 18$. Additionally, we compute $π_{19, 0}(F_q)^{\wedge}_2$ and $π_{20, 0}(F_q)^{\wedge}_2$ when $q \equiv 1 \bmod 4$ assuming Morel's connectivity theorem for $F_q$ holds.
description: 4 figures, 2 tables. Published version now available
The influence of the media center on the development of information skills at the high school level
Creators: name: Mitchell, Amelia
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 1999
Subjects: Secondary school--Media center--North Carolina
High school--Media center--North Carolina
Information skills--evaluation
Information skills--assessment
Media center--evaluation

description: This study assesses the media centers at three high schools of varied size in North Carolina.  School media centers were evaluated by students and staff to determine the quality of their media center and program.  Ninth and eleventh grade student skills knowledge was compared to eleventh grade skills knowledge and then contrasted with the perceived quality of the school's media center.  Media centers' strengths and weaknesses were identified that most likely influenced scores on the assessment.  Results of the study suggest that the degree of collaboration between teachers and media specialists affects the skills gained by students.
Towards a formulation of $f(R)$ supergravity
Creators: name: Diamandis, G. A.
name: Lahanas, A. B.
name: Tamvakis, K.
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: The supersymmetric completion of $R+R^2$ gravity is known to be equivalent to standard supergravity coupled to two chiral supermultiples with a Kähler potential of the no-scale type. The generalization of this programme to $f(R)$ gravity can be carried out in an analogous framework in terms of four chiral multiplets with appropriately chosen superpotential and Kähler potential. Although the construction strategy has been known for sometime, we carry out this programme further by setting these theories in a closed form. The general framework considered can accommodate supergravity actions local in the scalar curvature, dual to ordinary $N = 1$ supergravities. Although these are in general plagued by ghosts, the framework studied in this work offers a possibility that these can decouple as can be seen in specific examples.
description: 21 pages, references added, typos corrected
title: Palaeogeothermal history reconstruction as background for geothermal projects via clay minerals and organic matters
Creators: name:  Nguyen, Thanh Lan
name:  Ferreiro Mählmann, Rafael
Publisher: name: Deutsche Geologische Gesellschaft - Geologische Vereinigung e.V. (DGGV)
Year: 2021

description: Nowadays, geothermal energy could play an important role and source of renewable energy in replacing fossil fuels. In order to exploit effectively this potential, the suitable applied methods, and objectives need to have precise measurements to reconstruct the paleogeothermal history and evaluate the potential and stability (lifetime) of the geothermal system. Clay minerals provide the most important keys to solve the problems because clay minerals are the most abundant minerals group in geothermal systems. They can be used largely to interpret the physical-chemical conditions, isotope tracing, age, and evolution of a geothermal field. Especially changes in the interstratified clay structures (illitization, chloritization) present sensitive indicators to reconstruct evolution in either temperature and/or chemical environment. Moreover, the irreversible organic matter maturity supports the evolution of the sedimentary basin (maximum rate of sedimentation, burial, tectonic diagenesis, compaction, migration of fluids, thermal anomalies). Due to the different kinetics of organic matter and clay mineral reaction progress, different steps of the thermal history of sedimentary rocks can be distinguished. Thus, the combination of the methods allows the reconstruction of geothermal gradients and reciprocal heat flow conditions. Finally, clay minerals and organic matter studies therefore can help to better understand the paleogeothermal history of geothermal systems as well as give basic data for numerical models.
Non-equilibrium steady state in the hydro regime
Creators: name: Pourhasan, Razieh
Publisher: name: arXiv
Year: 2015
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the existence and properties of the non-equilibrium steady state which arises by putting two copies of systems at different temperatures into a thermal contact. We solve the problem for the relativistic systems that are described by the energy-momentum of a perfect hydro with general equation of state (EOS). In particular, we examine several simple examples: a hydro with a linear EOS, a holographic CFT perturbed by a relevant operator and a barotropic fluid, i.e., P = P(E). Our studies suggest that the formation of steady state is a universal result of the hydro regime regardless of the kind of fluid.
description: 1+17 pages
Large Enforced Sparse Non-Negative Matrix Factorization
Creators: name: Gavin, Brendan
name: Gadepally, Vijay
name: Kepner, Jeremy
Publisher: name: arXiv
Year: 2015
Subjects: subject: Machine Learning (cs.LG)
subject: Numerical Analysis (math.NA)
subject: Social and Information Networks (cs.SI)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: Non-negative matrix factorization (NMF) is a common method for generating topic models from text data. NMF is widely accepted for producing good results despite its relative simplicity of implementation and ease of computation. One challenge with applying NMF to large datasets is that intermediate matrix products often become dense, stressing the memory and compute elements of a system. In this article, we investigate a simple but powerful modification of a common NMF algorithm that enforces the generation of sparse intermediate and output matrices. This method enables the application of NMF to large datasets through improved memory and compute performance. Further, we demonstrate empirically that this method of enforcing sparsity in the NMF either preserves or improves both the accuracy of the resulting topic model and the convergence rate of the underlying algorithm.
description: 9 pages
A SOC-feedback Control Scheme for Fast Frequency Support with Hybrid Battery/Supercapacitor Storage System
Creators: name: Bruno, Sergio
name: De Carne, Giovanni
name: Iurlaro, Cosimo
name: Rodio, Carmine
name: Specchio, Mino
Publisher: name: Institute of Electrical and Electronics Engineers (IEEE)
Year: 2021

description: Providing fast frequency regulation by means of energy storage systems is currently considered as a viable solution to low-inertia issues, caused by power electronics-interfaced generators. In particular, hybrid energy storage systems, composed by more energy storage technologies having different power and energy ratings, can optimally support the frequency regulation. A supercapacitor/battery storage system, for example, can exploit the supercapacitor dynamic active power response for synthetic inertia control, while the battery can provide primary and secondary frequency regulation. However, the optimal energy management of hybrid energy storage systems during transients needs to be addressed further in literature. In this paper, a State of Charge (SOC) feedback control scheme is proposed, that adjusts the active power output reference depending on the state of charge, avoiding excessive stress on the components and limiting the state of charge excursions. Control system parameters are optimally tuned minimizing a weighted multi-objective function in the solution of an optimal control problem. Test results adopting different weights are presented and discussed.
Finding a Common Method of Presenting Electronic Journals on Academic Law Library Web Sites: Or, I'd Rather Be Herding Cats
Creators: name: Mize, Robin M.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2004
Subjects: Library Web Sites Design
Libraries United States Special Collections Electronic Journals

description: This study examines the manner in which e-journals are made accessible to users on 75 academic law library web sites. Information recorded included the utilization of MARC tags, the types of search functions provided, and the accessibility of links to both the database, GPO Access and the e-journal Issues in Legal Scholarship. The resulting data was then used to evaluate how effective library web sites were in presenting electronic periodicals to users. Conclusions drawn from these observations were used in conjunction with research regarding the information retrieval skills of library users conducted by other authors in order to formulate a suggested set of best practices for law library web site design.
Online Collections for Natural History Museums: A Heuristic Analysis
Creators: name: Weston, Eleanor
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2016
Subjects: Collection management (Museums)
Museum collection catalogs
Digitization of museum collections

description: This study analyzes the websites of fifty-nine natural history museums accredited by the American Alliance of Museums in order to determine current practices in online collection information for natural history museums and its relationship to institutional qualities.
Using a heuristic content analysis, this study looks at what collection information museums put on their own websites and external websites, search and browsing features for collection information, and whether they include written policies about loans and research visits using collection materials. Using a chi-square test, this information was analyzed in relation to demographic information, such as whether the museum is a non- profit, affiliated with a college or university, government operated, or charges for admission. The findings of this study indicate no significant relationship between these demographic factors, but strong relationships between a museum's likelihood to put collection information online and information about lending and research policies.
Infrared-Transparent Visible-Opaque Fabrics for Wearable Personal Thermal Management
Creators: name: Tong, Jonathan K.
name: Huang, Xiaopeng
name: Boriskina, Svetlana V.
name: Loomis, James
name: Xu, Yanfei
name: Chen, Gang
Publisher: name: arXiv
Year: 2015
Subjects: subject: Optics (physics.optics)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: Personal cooling technologies locally control the temperature of an individual rather than a large space, thus providing personal thermal comfort while supplementing cooling loads in thermally regulated environments. This can lead to significant energy and cost savings. In this study, a new approach to personal cooling was developed using an infrared-transparent visible-opaque fabric (ITVOF), which provides passive cooling via the transmission of thermal radiation emitted by the human body directly to the environment. Here, we present a conceptual framework to thermally and optically design an ITVOF. Using a heat transfer model, the fabric was found to require a minimum infrared (IR) transmittance of 0.644 and a maximum IR reflectance of 0.2 to ensure thermal comfort at ambient temperatures as high as 26.1oC (79oF). To meet these requirements, an ITVOF design was developed using synthetic polymer fibers with an intrinsically low IR absorptance. These fibers were then structured to minimize IR reflection via weak Rayleigh scattering while maintaining visible opaqueness via strong Mie scattering. For a fabric composed of parallel-aligned polyethylene fibers, numerical finite element simulations predict 1 μm diameter fibers bundled into 30 μm yarns can achieve a total hemispherical IR transmittance of 0.972, which is nearly perfectly transparent to mid- and far-IR radiation. The visible wavelength properties of the ITVOF are comparable to conventional textiles ensuring opaqueness to the human eye. By providing personal cooling in a form amenable to everyday use, ITVOF-based clothing offers a simple, low-cost solution to reduce energy consumption in HVAC systems.
description: 21 page; 8 figures
Creating Tuneable Microwave Media from a Two-Dimensional Lattice of Re-entrant Posts
Creators: name: Goryachev, Maxim
name: Tobar, Michael E.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The potential capabilities of resonators based on two dimensional arrays of re-entrant posts is demonstrated. Such posts may be regarded as magnetically-coupled lumped element microwave harmonic oscillators, arranged in a 2D lattices structure, which is enclosed in a 3D cavity. By arranging these elements in certain 2D patterns, we demonstrate how to achieve certain requirements with respect to field localisation and device spectra. Special attention is paid to symmetries of the lattices, mechanical tuning, design of areas of high localisation of magnetic energy, which in turn creates unique discrete mode spectra. We demonstrate analogies between systems designed on the proposed platform and well known physical phenomena such as polarisation, frustration and Whispering Gallery Modes. The mechanical tunability of the cavity with multiple posts is analysed and its consequences to optomechanical applications is calculated. One particular application to quantum memory is demonstrated with a cavity design consisting of separate resonators analogous to discrete Fabry-Pérot resonators. Finally, we propose a generalised approach to a microwave system design based on the concept of Programmable Cavity Arrays.
Noncompact self-shrinkers for mean curvature flow with arbitrary genus
Creators: name: Buzano, Reto
name: Nguyen, Huy The
name: Schulz, Mario B.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: In his lecture notes on mean curvature flow, Ilmanen conjectured the existence of noncompact self-shrinkers with arbitrary genus. Here, we employ min-max techniques to give a rigorous existence proof for these surfaces. Conjecturally, the self-shrinkers that we obtain have precisely one (asymptotically conical) end. We confirm this for large genus via a precise analysis of the limiting object of sequences of such self-shrinkers for which the genus tends to infinity. Finally, we provide numerical evidence for a further family of noncompact self-shrinkers with odd genus and two asymptotically conical ends.
description: Final version with minor modifications, to appear in Crelle
Age structure, growth and longevity in the common toad, Rhinella arenarum, from Argentina
Creators: name: Bionda, Clarisa
name: Kost, Silvia
name: Salas, Nancy
name: Lajmanovich, Rafael
name: Sinsch, Ulrich
name: Martino, Adolfo
Publisher: name: Acta Herpetologica
Year: 2015

description: Age structure, growth and longevity was determined in the common toad, Rhinella arenarum, from a suburban pond located in the Pampa plains, central Argentina during two breeding seasons, in 2000 and 2008 by using skeletochronology, which relies on the analysis of the annual lines of arrested growth (LAGs) in bones. Both females and males were captured in 2008, while only males were recorded in 2000. Females were significantly larger than males. Mean population age was 2.4 ± 0.9 years in 2000. In 2008, the difference in age was not significant between the sexes (Males: 3.0 ± 0.7, n = 21; Females: 2.6 ± 0.9, n = 12), neither between males in 2000 and 2008. The longevity in males of 2000 was 6 LAGs and exceeded that of males (5 LAGs) and females (4 LAGs) in 2008. Von Bertalanffy curves showed that the growth coefficient in the males of 2000 (K = 2.97 ± 0.47) was almost double that of females (K = 1.21 ± 0.10) and males (K = 1.01 ± 0.14) of 2008. Males and females Rhinella arenarum show different morphological and life history traits and the year of sampling can significantly influence the estimation of the studied parameters such as age at maturity and growth rates.
description: Acta Herpetologica, Vol 10 No 1 (2015)
Psychology and a Full Moon: A Correlational Study of Police Records and the Full Moon
Creators: name: Dean, Anthony
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Social and Behavioral Sciences

description: A correlational study of the phases of the moon and the number of police reports. I will be hoping to find out if the full moon makes people behave irrationally like the popular myth claims or if there are no more than average reports on a full moon.
Why Can't It All Be On the Web?: The Information Needs of Biomedical Informatics Scientists
Creators: name: Vaidhyanathan, Vedana
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2008
Subjects: subject: Bioinformatics
subject: FOS: Computer and information sciences
subject: Bioinformationist
subject: Library Assessment
subject: Information needs
subject: Information Assessment
subject: Biomedical Informatics

description: Bioinformatics researchers are a relatively new breed of scientist, emerging from many disciplines. In order for libraries to meet the needs of these researchers, a clear assessment of how they use the library and how they would like to use it is essential. Through in-person interviews with graduate students, post-doctoral students, researchers and medical doctors, this study examines bioinformatics researchers' use of the library and what would constitute their ideal library. It asks them how they currently use the library, and how they would change the library to better serve their research needs. The findings reveal that most of the researchers want more access to online sources and they want an easier way to access these sources than is currently provided. It is recommended that further studies concentrate on how libraries can publicize their current resources to target the bioinformatics research population.
Resilient expansion planning of virtual energy plant with an integrated energy system -- reliability criteria of lines and towers
Creators: name: Mishra, Sambeet
name: Manninen, Henri
name: Wu, Qiuwei
name: Bordin, Chiara
Publisher: name: arXiv
Year: 2021
Subjects: subject: Systems and Control (eess.SY)
subject: Optimization and Control (math.OC)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Mathematics

description: Virtual power plants, while being virtual, rely on a physical network for operations. The portfolio of the virtual power plants is flexible in facilitating a wide range of resources including the local heat pumps. The power transmission network has the responsibility to ensure the security of supply, reliability of operation, planning, and expansion. The power transmission network and apparatus including lines and towers are also aging with time. Furthermore, the transmission network covers a large geographical area which is expensive to maintain. The objective of this paper is to investigate the effect of power network conditions on power network expansion planning. The condition of the power network is determined by the maintenance cost of lines and a health index and a risk factor associated with the tower. The investigation begins with answering how the inclusion of heat pump impacts the decisions on network interventions. Thereafter, the condition network is factored into the decision-making by better understanding the impact of the network condition on the overall expansion planning. Furthermore, many sensitivity analyses are conducted to evaluate the trade-offs between decision variables such as cost of heat pump, coefficient of performance of heat pump, risk factors, and line and tower costs.
description: 40 pages, 14 figures
On a putative type specimen of Pleurodema bibroni Tschudi, 1838 from Chile (Anura: Leptodactylidae)
Creators: name: Ferraro, Daiana
Publisher: name: Acta Herpetologica
Year: 2015

description: The original description of the Neotropical frog Pleurodema bibroni was based on material collected at “Monte-Video” [Montevideo, Uruguay], but no type specimen was originally designated. In several publications, a specimen deposited at the National Museum of Natural History of Leiden (The Netherlands, RMNH 2277) and collected at Valparaíso, Chile, has been referred as type specimen of P. bibroni. Herein, it is argued that RMNH 2277 is not a type specimen of P. bibroni; nor can it be assigned to P. bibroni, but probably to Pleurodema thaul, a species with which P. bibroni was long confused.
description: Acta Herpetologica, Vol 10 No 1 (2015)
Accessing Information Based on a Combination of Document Structure and Content: Exploiting XML tags in indexing and searching to enhance content retrieval of online document-centric XML encoded texts
Creators: name: Teague Rector, Susan E.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2004
Subjects: Information retrieval
Full Text Searching--Deans Achievement Award
Semistructured Data Indexing
Best Masters Papers Awarded 2005
XML Search & Retrieval

description: This study explores the challenges of using traditional information retrieval methods to retrieve document-centric XML encoded text. It demonstrates how coupling structure and content in query and index formulation improves retrieval performance. Native XML database (NXD) and search engine technologies were evaluated in a baseline experiment, and in a second test after alterations were made to their respective indexes. Documents were retrieved for simple and complex forms of 30 XPath and keyword queries from a corpus of 95 XML/TEI encoded texts. Overall results indicated that query augmentation using document structure improves retrieval performance. Complex queries submitted to the NXD produced the most satisfying results, with an average precision of 93.3% and an average recall of 86.3%. Performance improvements were also achieved using complex, structured queries and indexes in the search engine. Study findings suggest that effective XML retrieval models might result from a combination of unstructures and structured retrieval techniques.