cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
PETALO read-out: A novel approach for data acquisition systems in PET applications
Creators: name: Herrero-Bosch, V.
name: Gadea, R.
name: Aliaga, R. J.
name: Rodríguez, J.
name: Toledo, J. F.
name: Torres-Curado, R.
name: Ballester, F.
name: Esteve, R.
name: Gómez-Cadenas, J. J.
name: Ferrario, P.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: PETALO (a Positron Emission Tof Apparatus based on Liquid xenOn) is a new approach for Positron Emission Tomography scanners, based on liquid xenon. The PETALO detector aims at capturing the light produced by the scintillation in LXe taking advantage of its uniform response and continuity. This strategy will lead to a geometrical distortion free behavior compared to other PET detectors. To this end, the sensors chosen for the light readout are SiPMs, which provide large area, high gain and very low noise. In order to take advantage of the unique PETALO detector characteristics a read-out architecture must be designed to meet the following specifications: Electronics associated to detector (front-end and read-out itself) must be fully expandable in terms of detector size. Read-out scheme must be compatible with the non-segmented structure of the detector. Time of Flight (TOF) capabilities must be assured at the scanner level, that is to say front-end and read-out electronics should not degrade LXe time performance. In these proceedings, a new readout concept is introduced which is compatible with a fully continuous medium detector such as PETALO. Results show that the system is feasible, with the introduction of a fast compression technique to further reduce the data bandwidth requirements.
Ergodic coactions with large multiplicity and monoidal equivalence of quantum groups
Creators: name: Bichon, Julien
name: De Rijdt, An
name: Vaes, Stefaan
Publisher: name: arXiv
Year: 2005
Subjects: subject: Operator Algebras (math.OA)
subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics

description: We construct new examples of ergodic coactions of compact quantum groups, in which the multiplicity of an irreducible corepresentation can be strictly larger than the dimension of the latter. These examples are obtained using a bijective correspondence between certain ergodic coactions on C*-algebras and unitary fiber functors on the representation category of a compact quantum group. We classify these unitary fiber functors on the universal orthogonal and unitary quantum groups. The associated C*-algebras and von Neumann algebras can be defined by generators and relations, but are not yet well understood.
description: After completion of a first version of this paper, signed by the last two authors, the first author joined the project and his preprint [6] was taken into account, yielding the current paper as a final result
Detecting Attacks in Network Traffic Using Normality Models: The Cellwise Estimator.
Creators: name: Heine, Felix
name: Kleiner, Carsten
name: Klostermeyer, Philip
name: Ahlers, Volker
name: Laue, Tim
name: Wellermann, Nils
Publisher: name: CISPA
Year: 2024

description: Although machine learning (ML) for intrusion detection is attracting research, its deployment in practice has proven difficult. Major hindrances are that training a classifier requires training data with attack samples, and that trained models are bound to a specific network.

To overcome these problems, we propose two new methods for anomaly-based intrusion detection. Both are trained on normal-only data, making deployment much easier. The first approach is based on One-class SVMs, while the second leverages our novel Cellwise Estimator algorithm, which is based on multidimensional OLAP cubes. The latter has the additional benefit of explainable output, in contrast to many ML methods like neural networks. The created models capture the normal behavior of a network and are used to find anomalies that point to attacks. We present a thorough evaluation using benchmark data and a comparison to related approaches showing that our approach is competitive.
Collisionless Damping of Fast MHD Waves in Magneto-rotational Winds
Creators: name: Suzuki, T. K.
name: Yan, H.
name: Lazarian, A.
name: Cassinelli, J. P.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We propose collisionless damping of fast MHD waves as an important mechanism for the heating and acceleration of winds from rotating stars. Stellar rotation causes magnetic field lines anchored at the surface to form a spiral pattern and magneto-rotational winds can be driven. If the structure is a magnetically dominated, fast MHD waves generated at the surface can propagate almost radially outward and cross the field lines. The propagating waves undergo collisionless damping owing to interactions with particles surfing on magnetic mirrors that are formed by the waves themselves. The damping is especially effective where the angle between the wave propagation and the field lines becomes moderately large ($\sim 20$ to $80^{\circ}$). The angle tends naturally to increase into this range because the field in magneto-rotational winds develops an increasingly large azimuthal component. The dissipation of the wave energy produces heating and acceleration of the outflow. We show using specified wind structures that this damping process can be important in both solar-type stars and massive stars that have moderately large rotation rates. This mechanism can play a role in coronae of young solar-type stars which are rapidly rotating and show X-ray luminosities much larger than the sun. The mechanism could also be important for producing the extended X-ray emitting regions inferred to exist in massive stars of spectral type middle B and later.
description: 12 pages, including 7 figures, accepted for publication in ApJ
NEW BIOSTRATIGRAPHIC DATA FROM THE LADINIAN PELAGIC LIMESTONES OF PIZZO DI SANT’OTIERO - MADONIE MOUNTAINS, SICILY.
Creators: name: DI STEFANO, PIETRO
name: RIGO, MANUEL
name: TRIPODO, ANGELO
name: TODARO, SIMONA
name: ZARCONE, GIUSEPPE
Publisher: name: Università degli Studi di Milano
Year: 2014

description: New biostratigraphic data, based on conodont investigations, were collected from the Ladinian limestones recently described at Sant’Otiero, a locality near the Village of Petralia Sottana in the Madonie Mountains (Central-Northern Sicily). At this locality a new calcareous succession lying at the base of a major tectonic unit of the Maghrebian chain is described. This succession consists of a lower massive part formed by a carbonate megabreccia, the elements of which are shallow water extraclasts with dasycladalean algae (Diplopora annulatissima Pia), benthic foraminifers, “Tubiphytes” and problematic organisms commonly described from Anisian carbonate platforms. Upward a well-bedded succession of dark-gray Daonella -bearing calcilutites follows. The presence of the bivalve Daonella tyrolensis Mojsisovics in a Lumachella bed from the upper part of the calcilutites can be related to the ammonoid Protrachyceras longobardicum Zone, upper Ladinian in age (lower Longobardian). Upward a sharp contact(decollement?) with the typical sediments of the Mufara Formation can be observed. A re-sampling of the Daonella -bearing calcilutites for conodont investigation has been carried out in order to better constrain the age of this succession. The distribution of conodont species such as Budurovignathus  hungaricus (Kozur & Végh), B.  mungoensis (Diebel) and Paragondolella  trammeri (Kozur) among other conodonts, permits the correlation of the succession to the P. gradleri and P. archelaus ammonoid Zones, extending downwards the age of the calcilutites at Sant’Otiero to the upper Fassanian. This confirms that the Sant’Otiero succession is a key section to document Ladinian pelagic carbonate sedimentation in the westernmost termination of the Ionian Tethys.
description: Rivista italiana di Paleontologia e Stratigrafia, Vol 120, No 1
Rough translation of audio files recorded in 2011
Creators: name: Parker, Verdena
name: Spence, Justin
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: hup

description: Audio file VP-031019-10: Rough translation (minute-by-minute) of files VP-010511-49 through VP-010511-54. No transcription in these sessions, translation only.
Computing and Proving Well-founded Orderings through Finite Abstractions
Creators: name: Sumners, Rob
Publisher: name: arXiv
Year: 2020
Subjects: subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences

description: A common technique for checking properties of complex state machines is to build a finite abstraction then check the property on the abstract system -- where a passing check on the abstract system is only transferred to the original system if the abstraction is proven to be representative. This approach does require the derivation or definition of the finite abstraction, but can avoid the need for complex invariant definition. For our work in checking progress of memory transactions in microprocessors, we need to prove that transactions in complex state machines always make progress to completion. As a part of this effort, we developed a process for computing a finite abstract graph of the target state machine along with annotations on whether certain measures decrease or not on arcs in the abstract graph. We then iteratively divide the abstract graph by splitting into strongly connected components and then building a measure for every node in the abstract graph which is ensured to be reducing on every transition of the original system guaranteeing progress. For finite state target systems (e.g. hardware designs), we present approaches for extracting the abstract graph efficiently using incremental SAT through GL and then the application of our process to check for progress. We present an implementation of the Bakery algorithm as an example application.
description: In Proceedings ACL2 2020, arXiv:2009.12521
FIRST RECORD OF ICHTHYOSAURS IN SICILY(UPPER TRIASSIC OF MONTE SCALPELLO, CATANIA PROVINCE)
Creators: name: DAL SASSO, CRISTIANO
name: INSACCO, GIANNI
name: ALESSANDRO CHIARENZA, ALFIO
name: DI FRANCO, DAVIDE
name: REITANO, AGATINO
Publisher: name: Università degli Studi di Milano
Year: 2014

description: Here we report for the first time on the presence of ichthyosaurs in Sicily, southern Italy. The deposit of origin (Mufara Formation) can be dated to the upper Carnian (Tuvalian substage) based on a typical association of ammonites, one of which (Shastites sp.) is embedded in the sediment still encrusting one of the bone specimens recently found. The latter consist of two isolated vertebral centra that are referred to the Ichthyosauria thanks to their disk-like shape (i.e. they are much taller than long) combined with the amphicelous condition, lack of transverse processes, and presence of rib articulations on the central sides. The largest specimen is more precisely an anterior dorsal vertebra from an adult individual, ascribed to Shastasauridae indet. By the presence of elongated reniform diapophyseal facets, cranially not truncated, and absence of parapophyses. The smaller specimen represents an anterior cervical element from an immature individual of a likely smaller-sized, indeterminate taxon. These finds indicate that the biodiversity of the Monte Scalpello Triassic fauna is higher than previously known, but above all represent the southernmost occurrence of Triassic ichthyosaurs in the western Tethys basin.
description: Rivista italiana di Paleontologia e Stratigrafia, Vol 120, No 1
Estimating Mixed Memberships With Sharp Eigenvector Deviations
Creators: name: Mao, Xueyu
name: Sarkar, Purnamrita
name: Chakrabarti, Deepayan
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Ecology
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Computational Biology

description: We consider the problem of estimating community memberships of nodes in a network, where every node is associated with a vector determining its degree of membership in each community. Existing provably consistent algorithms often require strong assumptions about the population, are computationally expensive, and only provide an overall error bound for the whole community membership matrix. This article provides uniform rates of convergence for the inferred community membership vector of each node in a network generated from the mixed membership stochastic blockmodel (MMSB); to our knowledge, this is the first work to establish per-node rates for overlapping community detection in networks. We achieve this by establishing sharp row-wise eigenvector deviation bounds for MMSB. Based on the simplex structure inherent in the eigen-decomposition of the population matrix, we build on established corner-finding algorithms from the optimization community to infer the community membership vectors. Our results hold over a broad parameter regime where the average degree only grows poly-logarithmically with the number of nodes. Using experiments with simulated and real datasets, we show that our method achieves better error with lower variability over competing methods, and processes real world networks of up to 100,000 nodes within tens of seconds. Supplementary materials for this article are available online.
Magnetic properties of carbon phases synthesized using high pressure-high temperature treatment
Creators: name: Han, K. -H.
name: Talyzin, A.
name: Dzwilewski, A.
name: Makarova, T. L.
name: Hohne, R.
name: Esquinazi, P.
name: Spemann, D.
name: Dubrovinsky, L. S.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Two sets of samples were synthesized at 3.5 GPa near the point of C60 cage collapse at different annealing times. A clear structural transformation from mixture of C60 polymeric phases to graphite-like hard carbon phase was confirmed by X-ray diffraction and Raman spectroscopy. Magnetic force microscopy and superconducting quantum interference device were used to characterize the magnetic properties of the synthesized samples. We found that the sample preparation conditions used in this study are not suitable to produce bulk magnetic carbon.
description: 26 pages, 7 figures
Response of carabid species and assemblages to forest practices of British Columbia in Engelmann spruce-subalpine fir and interior cedar-hemlock forests
Creators: name: McDowell, Jocylyn K.
Publisher: name: University of British Columbia
Year: 2009

description: The global extinction rate is currently accelerating at an alarming pace. Habitat loss through the processes of resource extraction, such as forestry are being blamed for much of the loss of biodiversity. In Canada timber extraction is extremely important economically, but modern silvicultural practices are impinging upon constituant and structural features of forest ecosystems, in particular, arthropods. It is important to characterize both the constituant arthropod species of our forests, and their response to forest practices in British Columbia. In this study the effects of clear and partial cutting and shrub removal, and the role of coarse woody debris were tested in Engelmann Spruce Subalpine Fir (ESSF) and Interior Cedar Hemlock (ICH) forests. Ground beetles (Coleoptera: Carabidae) were collected by pitfall traps, and the diversity of assemblages, and the abundance of individual species were described. Richness was calculated by rarefaction; rank abundance (Whittaker) plots and the log series alpha were calculated to characterize dominance structure; and the Shannon-Weiner and Simpson heterogeneity statistics were calculated. Intraspecific treatment effects were tested with the Kruskal-Wallis single-factor analysis of variance by rank and non-parametric multiple comparison tests. A dendrogram was generated to assess forest type and treatment differences. More than 36,000 carabid beetles consisting of 37 species were collected. A new species, now called Bembidion jocylyn Kavanaugh and Erwin, was collected. ESSF sites had more individuals, but fewer species than ICH sites. Logging had a positive effect on diversity but a negative impact on the total number of individuals. The impact of clear cutting in the ESSF endured longer than that in the ICH. Partial cutting reduced the abundance of individuals, but had little effect on overall diversity. Forest species decreased, but did not disappear in clear cuts; species typical of open habitats increased in clear cuts; habitat generalists were common in most sites. Most carabid species were either unaffected or responded favorably to the removal of shrubs: there was an increase in abundance in the ESSF, and in richness in the ICH. Carabid beetles appeared not to have a relationship to coarse woody debris, but there were problems with this third study.
THE MIDDLE JURASSIC TO LOWER CRETACEOUS SUCCESSION OF THE PONIKVE KLIPPE: THE SOUTHERNMOST OUTCROPS OF THE SLOVENIAN BASIN IN WESTERN SLOVENIA
Creators: name: ROŽIČ, BOŠTJAN
name: GORIČAN, ŠPELA
name: ŠVARA, ASTRID
name: ŠMUC, ANDREJ
Publisher: name: Università degli Studi di Milano
Year: 2014

description: The Slovenian Basin was a Mesozoic deep-water paleogeographic domain located north of the Dinaric Carbonate Platform. Due to a considerable amount of southward-directed thrusting and subsequent erosion, the marginal parts of this basin are only sparsely preserved. The southernmost remains of the Slovenian Basin in western Slovenia are found in the Ponikve Klippe, where we studied a Middle Jurassic (? Aalenian) to Lower Cretaceous (Albian) succession. We dated the succession with radiolarians, calpionellids, and benthic foraminifers. The succession is divided into three formations. The first is the Middle Jurassic to Lower Tithonian Tolmin Formation, composed of radiolarian cherts, siliceous limestone, and calciturbidites. The second formation is the Upper Tithonian–Berriasian Biancone limestone, which consists of pelagic limestone with calpionellids and one interstratified calciturbidite. The third formation, the Lower flyschoid formation, rests upon a prominent, regionally recognized erosional unconformity. The formation begins with calcareous breccia and continues with finer-grained calciturbidites that alternate with marl/shale and chert. Only the lower part of this formation was investigated and dated to the late Aptian to early Albian.
The correlation of the studied section with the previously described successions of the Slovenian Basin shows that the Jurassic part of the section clearly exhibits a more marginal setting, whereas the Cretaceous part of the section correlates well with the central basinal succession. This inversion was related to the late Aptian tectonic event that was also responsible for the considerable submarine erosion and deposition of the basal breccia of the Lower flyschoid formation.
description: Rivista italiana di Paleontologia e Stratigrafia, Vol 120, No 1
Can GPT-4 do L2 analytic assessment?
Creators: name: Bannò, Stefano
name: Vydana, Hari Krishna
name: Knill, Kate M
name: Gales, Mark JF
Publisher: name: ACL
Year: 2024
Subjects: cs.CL

description: Automated essay scoring (AES) to evaluate second language (L2) proficiency has been a firmly established technology used in educational contexts for decades. Although holistic scoring has seen advancements in AES that match or even exceed human performance, analytic scoring still encounters issues as it inherits flaws and shortcomings from the human scoring process. The recent introduction of large language models presents new opportunities for automating the evaluation of specific aspects of L2 writing proficiency. In this paper, we perform a series of experiments using GPT-4 in a zero-shot fashion on a publicly available dataset annotated with holistic scores based on the Common European Framework of Reference and aim to extract detailed information about their underlying analytic components. We observe significant correlations between the automatically predicted analytic scores and multiple features associated with the individual proficiency components.
Efficiency Comparison in Replace Missing Value Using Regression Imputation, Multiple Imputation and Expectation Maximization for Classification in Data Mining
Creators: name: Theeridsara Ngernwilai
Publisher: name: Thammasat University
Year: 2020
Subjects: missing value
regression imputation
multiple imputation
eXpectation maximization
K-nearest neighbor
decision tree
artificial neural network
support vector machine

description: Thai Journal of Science and Technology, 9, 5, 575-588
Re-transcription of texts told by Stella Jarnaghan
Creators: name: Parker, Verdena
name: Spence, Justin
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: hup

description: Audio file VP-031019-08: Re-transcription and translation of texts told by Stella Jarnaghan to Mary Woodward in 1953, archived at the Survey of California and Other Indian Languages (Woodward.002.002), Text 22, pp. 8-9.
Witte, Bernd: Die Schritte des Origenes "Über das Passa"
Creators: name: Bienert, Wolfgang A.
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 44 Nr. 3 (1995): Ökumenische Rundschau, Band 44, Heft 3
NANNOFOSSIL EVENTS AND STRATIGRAPHY OF THE ILAM FORMATION IN ZAGROS (SW IRAN)
Creators: name: SENEMARI, SAEEDEH
name: BAHRAMMANESH TEHRANI, MARYAMNAZ
name: MOHAMMADI, FATEMEH
Publisher: name: Università degli Studi di Milano
Year: 2014

description: Exploration studies of Cretaceous system in the Zagros region are very important due to the presence large hydrocarbon fields like the Ab-Teymur oilfield. The first data on the distribution of calcareous nannofossils in the Ilam Formation, belonging to the Bangestan Group in the Zagros Basin, are presented here. According to the distribution of calcareous nannofossils, the Upper Cretaceous deposits of the section are subdivided into three complete biostratigraphic units, namely: the Micula decussata (CC14-Late Coniacian), Reinhardtites anthophorus (CC15-late Early Santonian), Lucianorhabdus cayeuxii (CC16-Late Santonian) and base of CC17 zones. This record confirms the existence of biozone CC14 to basal CC17 of the zonation of Sissingh (1977), which suggests an age from Late Coniacian to Late Santonian for the studied sediments. Besides biostratigraphy, the presence of abundant calcareous nannofossils typical of warm climate and low latitude conditions in Ab-Teymur oilfield allows paleoenvironmental interpretations.
description: Rivista italiana di Paleontologia e Stratigrafia, Vol 120, No 1
The Museum of Moving Images, Granville Island, Vancouver
Creators: name: Kwong, Maureen
Publisher: name: University of British Columbia
Year: 2009

description: In October 1997 The Emily Carr Institute of Art and Design proposed that a Museum of Moving Images be built at the site adjacent to the intended Granville Island Film Center currently under development permit application at The City of Vancouver. ECIAD intended the museum to show "... the magic in which the film was created by..." In addition, the program would comprise a library of books, videos, and compact discs. The starting point of the thesis was the two key words of the program: "moving" and "image". The museum was dependent not only the phenomenal qualities of site but the recognition of the visceral and of the construction of images through human vision and experience. The thesis explored fundamental constructs of film (the projection of light through an image on transparency onto a surface and further, the way the eye registers that phenomena) as a basic framework for realizing the principles of the moving image. Beginning at the ground both the parking on the site and the adjacent site gradually slopes to the lowest part of the "bar" building which from ground to sky consists of gallery, retail space, library, small theater and administration offices. The bar is intersected by a series of "tubes" containing the museum spaces. The front facade along the retail strip is the point at which all of the program can be read simultaneously. The first tube begins at the point of entry of the museum and gradually rises and switches back and forth through the site up to the third level of the larger bar building where there is a connection to the neighbouring film center, the library, or the roof top. Each tube is punctured with slots that allow glimpses and chance visual connections of other bodies moving through the museum and facilitates the registration of the bodies position within the space of the museum and the site.
Counterfactual Analysis With Artificial Controls: Inference, High Dimensions, and Nonstationarity
Creators: name: Masini, Ricardo
name: Medeiros, Marcelo C.
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Biotechnology
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Developmental Biology
subject: Science Policy
subject: Plant Biology

description: Recently, there has been growing interest in developing statistical tools to conduct counterfactual analysis with aggregate data when a single “treated” unit suffers an intervention, such as a policy change, and there is no obvious control group. Usually, the proposed methods are based on the construction of an artificial counterfactual from a pool of “untre ated” peers, organized in a panel data structure. In this article, we consider a general framework for counterfactual analysis for high-dimensional, nonstationary data with either deterministic and/or stochastic trends, which nests well-established methods, such as the synthetic control. We propose a resampling procedure to test intervention effects that does not rely on postintervention asymptotics and that can be used even if there is only a single observation after the intervention. A simulation study is provided as well as an empirical application. Supplementary materials for this article are available online.
Dynamics of galaxy cores and supermassive black holes
Creators: name: Merritt, David
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Recent work on the dynamical evolution of galactic nuclei containing supermassive black holes is reviewed. Topics include galaxy structural properties; collisionless and collisional equilibria; loss-cone dynamics; and dynamics of binary and multiple supermassive black holes.
description: 75 pages, 28 figures. To appear in Reports on Progress in Physics
BODY SIZE REDUCTION AND TOOTH AGENESIS IN LATE PLEISTOCENE  MELES MELES  (CARNIVORA, MAMMALIA) FROM INGARANO (SOUTHERN ITALY)
Creators: name: ADAM IURINO, DAWID
Publisher: name: Università degli Studi di Milano
Year: 2014

description: In mammals combined factors such as body size reduction and loss of peripheral teeth are often associated with endemism phenomena. This condition is particularly evident in insular contexts where is a complete geographic isolation. During the Pleistocene there have been several glacial stages, which changed the physiognomy of the Italian peninsula strongly influencing the distribution and morphology of mammalian faunas. Several genetic studies have shown that some Southern Italian areas have particular endemic species of small and medium size mammals. During Pleistocene these areas have been characterized by particular climatic/environmental conditions, and are generally called "glacial refugia". They represent geographically isolated areas over time, where the origin of faunas with peculiar features is favoured. In this study, the occurrence of Meles meles from the Late Pleistocene site of Ingarano (Apulia, Southern Italy) is documented for the first time. This taxon is represented only by a partial skull (splancnocranum) that, despite the relative completeness, includes peculiar and well-preserved dental features that could be related to a partial endemic condition. The fossil shows a reduced body size and the agenesis of peripheral teeth, both conditions that are typical of the extant badgers from Crete, Rhodes and Japan. To test this hypothesis, tomographic analysis have been provided to establish the dental agenesis, and, in order to understand the magnitude of the body size reduction, biometric analyses have been carried on. The obtained data have been compared to measures of the extant Eurasian badgers.
SHORT NOTE
description: Rivista italiana di Paleontologia e Stratigrafia, Vol 120, No 1
Charge carrier correlation in the electron-doped t-J model
Creators: name: Leung, P. W.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We study the t-t'-t''-J model with parameters chosen to model an electron-doped high temperature superconductor. The model with one, two and four charge carriers is solved on a 32-site lattice using exact diagonalization. Our results demonstrate that at doping levels up to x=0.125 the model possesses robust antiferromagnetic correlation. When doped with one charge carrier, the ground state has momenta (\pmπ,0) and (0,\pmπ). On further doping, charge carriers are unbound and the momentum distribution function can be constructed from that of the single-carrier ground state. The Fermi surface resembles that of small pockets at single charge carrier ground state momenta, which is the expected result in a lightly doped antiferromagnet. This feature persists upon doping up to the largest doping level we achieved. We therefore do not observe the Fermi surface changing shape at doping levels up to 0.125.
New results related to a conjecture of Manickam and Singhi
Creators: name: Chiaselotti, G.
name: Infante, G.
name: Marino, G.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05D05, 05A15

description: In 1998 Manickam and Singhi conjectured that for every positive integer $d$ and every $n \ge 4d$, every set of $n$ real numbers whose sum is nonnegative contains at least $\binom {n-1}{d-1}$ subsets of size $d$ whose sums are nonnegative. In this paper we establish new results related to this conjecture. We also prove that the conjecture of Manickam and Singhi does not hold for $n=2d+2$.
The Augmented Synthetic Control Method
Creators: name: Ben-Michael, Eli
name: Feller, Avi
name: Rothstein, Jesse
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Physiology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Cancer
subject: Plant Biology

description: The synthetic control method (SCM) is a popular approach for estimating the impact of a treatment on a single unit in panel data settings. The “synthetic control” is a weighted average of control units that balances the treated unit’s pretreatment outcomes and other covariates as closely as possible. A critical feature of the original proposal is to use SCM only when the fit on pretreatment outcomes is excellent. We propose Augmented SCM as an extension of SCM to settings where such pretreatment fit is infeasible. Analogous to bias correction for inexact matching, augmented SCM uses an outcome model to estimate the bias due to imperfect pretreatment fit and then de-biases the original SCM estimate. Our main proposal, which uses ridge regression as the outcome model, directly controls pretreatment fit while minimizing extrapolation from the convex hull. This estimator can also be expressed as a solution to a modified synthetic controls problem that allows negative weights on some donor units. We bound the estimation error of this approach under different data-generating processes, including a linear factor model, and show how regularization helps to avoid over-fitting to noise. We demonstrate gains from Augmented SCM with extensive simulation studies and apply this framework to estimate the impact of the 2012 Kansas tax cuts on economic growth. We implement the proposed method in the new augsynth R package.
Nucleosynthesis imprints from different Type Ia Supernova explosion scenarios and implications for galactic chemical evolution
Creators: name: Lach, F.
name: Roepke, F. K.
name: Seitenzahl, I. R.
name: Coté, B.
name: Gronow, S.
name: Ruiter, A. J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We analyze the nucleosynthesis yields of various Type Ia supernova explosion simulations including pure detonations in sub- Chandrasekhar mass white dwarfs, double detonations and pure helium detonations of sub-Chandrasekhar mass white dwarfs with an accreted helium envelope, a violent merger model of two white dwarfs and deflagrations as well as delayed detonations in Chandrasekhar mass white dwarfs. We focus on the iron peak elements Mn, Zn and Cu. To this end, we also briefly review the different burning regimes and production sites of these elements as well as the results of abundance measurements and several galactic chemical evolution studies. We find that super-solar values of [Mn/Fe] are not restricted to Chandrasekhar mass explosion models. Scenarios including a helium detonation can significantly contribute to the production of Mn, in particular the models proposed for calcium-rich transients. Although Type Ia supernovae are often not accounted for as production sites of Zn and Cu, our models involving helium shell detonations can produce these elements in super-solar ratios relative to Fe. Our results suggest a re-consideration of Type Ia supernova yields in galactic chemical evolution models. A detailed comparison with observations can provide new insight into the progenitor and explosion channels of these events.
description: 15 paged, 8 figures, accepted for publication in A&A
ADDITIONAL BRACHIOPOD FINDINGS FROM THE LOPINGIAN SUCCESSION OF THE ALI BASHI MOUNTAINS, NW IRAN
Creators: name: GARBELLI, CLAUDIO
name: ANGIOLINI, LUCIA
name: SHEN, SHUZHONG
name: CRIPPA, GAIA
name: YUAN, DONGXUN
name: BAHRAMMANESH, MARYAMNAZ
name: ABBASI, SYRIUS
name: BIRJANDI, MINA
Publisher: name: Università degli Studi di Milano
Year: 2014

description: Aim of this note is to describe additional findings of Lopingian brachiopods along the Main Valley section and at Localities 1, 3, and 4 of the Ali Bashi Mountains, N Iran. Here we provide:
1) taxonomic descriptions of two newly recorded taxa, one of which is a new species, Meekella julfensis n. sp.;
2) more information on the stratigraphic range of brachiopods from the Ali Bashi Mountains, which show a greater abundance and diversity in the upper part of the Julfa Formation, in the Ali Bashi Formation, and in the Boundary Clay. The newly collected faunas are characterized by miniaturization which is considered to be a response to deep water conditions in well oxygenated, but trophic resource-limited settings, and not a Lilliput-effect related to the end-Permian crisis;
3) a discussion on the phylogenetic relationships between Araxathyris and Transcaucasathyris , proposing that the former may have evolved from the latter by the convergence of the dental plates to form a spondylium, that was probably a structure that functioned to optimize the muscle length in response to greater shell volumes.
description: Rivista italiana di Paleontologia e Stratigrafia, Vol 120, No 1
Keeping Up with the KEMs: Stronger Security Notions for KEMs and Automated Analysis of KEM-based Protocols
Creators: name: Dax, Alexander
name: Cremers, Cas
name: Medinger, Niklas
Publisher: name: CISPA
Year: 2024

description: Key Encapsulation Mechanisms (KEMs) are a critical building block for hybrid encryption and modern security protocols, notably in the post-quantum setting. Given the asymmetric public key of a recipient, the primitive establishes a shared secret key between sender and recipient. In recent years, a large number of abstract designs and concrete implementations of KEMs have been proposed, e.g., in the context of the NIST process for post-quantum primitives.

In this work, we (i) establish stronger security notions for KEMs, and (ii) develop a symbolic analysis method to analyze security protocols that use KEMs. First, we generalize existing security notions for KEMs in the computational setting, introduce several stronger security notions and prove their relations. Our new properties formalize in which sense outputs of the KEM uniquely determine, i.e., bind, other values. Our new binding properties can be used, e.g.,
to prove the absence of attacks that were not captured by prior security notions. Among these, we identify a new class of attacks that we coin re-encapsulation attacks.

Second, we develop a family of fine-grained symbolic models
that correspond to our hierarchy of computational security notions, and are suitable for the automated analysis of KEM-based security protocols. We encode our models as a library in the framework of the Tamarin prover. Given a KEM-based protocol, our approach can automatically derive the minimal binding properties required from the KEM; or, if also given a concrete KEM, can analyze if the protocol meets its security goals. In case studies, Tamarin automatically discovers, e.g., that the key exchange protocol proposed in the original Kyber paper [12] requires stronger properties from the KEM than were proven in [12].
title: Optimisation of Linux System Settings for Access to the JASMIN/CEMS Panasas Storage
Creators: name: Del Cano Novales, C
Publisher: name: Science and Technology Facilities Council
Year: 2013

description: The JASMIN/CEMS super-data-cluster provides fast, parallel storage and a computing environment for UK and European climate and earth observation communities. Deployed at the Rutherford Appleton Laboratory as a joint project between RAL Space and the Scientific Computing Department, the system comprises a 4.6PB usable parallel storage, collocated with the Lotus HPC compute facility and a virtualisation infrastructure. The JASMIN/CEMS cluster provides the infrastructure for data storage and services for the Centre for Environmental Data Archival, as well as data processing and scientific computation for the climate, earth system science and earth observation communities, including the ISIC/Satellite Applications Catapult funded by the UK Space Agency. Panasas is a very high-performance system which requires a high quality network for optimal performance. Network components and brands behave differently so Panasas recommends spending some time finding the optimal settings for best performance. This report describes the investigation into the optimal system settings for increasing the storage access performance, both from physical hosts and from virtual machines.
Randomization Tests for Weak Null Hypotheses in Randomized Experiments
Creators: name: Wu, Jason
name: Ding, Peng
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Neuroscience
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Cancer
subject: Science Policy

description: The Fisher randomization test (FRT) is appropriate for any test statistic, under a sharp null hypothesis that can recover all missing potential outcomes. However, it is often sought after to test a weak null hypothesis that the treatment does not affect the units on average. To use the FRT for a weak null hypothesis, we must address two issues. First, we need to impute the missing potential outcomes although the weak null hypothesis cannot determine all of them. Second, we need to choose a proper test statistic. For a general weak null hypothesis, we propose an approach to imputing missing potential outcomes under a compatible sharp null hypothesis. Building on this imputation scheme, we advocate a studentized statistic. The resulting FRT has multiple desirable features. First, it is model-free. Second, it is finite-sample exact under the sharp null hypothesis that we use to impute the potential outcomes. Third, it conservatively controls large-sample Type I error under the weak null hypothesis of interest. Therefore, our FRT is agnostic to the treatment effect heterogeneity. We establish a unified theory for general factorial experiments and extend it to stratified and clustered experiments. Supplementary materials for this article are available online.
title: Tensor product of random orthogonal matrices
Creators: name: Arioli, Mario
Publisher: name: Science and Technology Facilities Council
Year: 2013
Subjects: Random orthogonal matrices
SCI COM 2013-2014
Gaussian factorization
Engineering

description: In this short note, we introduce a class of orthogonal matrices of order n for which the matrix by vector product can be be computed in O(nlogn) instead of O(n^2). The matrices in this class form a proper Lie subgroup of the set of the orthogonal matrices random generated following the Haar's measure distribution. Given a vector that has the absolute values of its entries presenting large variations of magnitude, the product of a matrix in the subgroup by this vector will produce a new vector where the magnitude of the absolute values of the entries does not vary by a very large amount.
The Spin-Resolved Atomic Velocity Distribution and 21-cm Line Profile of Dark-Age Gas
Creators: name: Hirata, Christopher M.
name: Sigurdson, Kris
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The 21-cm hyperfine line of atomic hydrogen (HI) is a promising probe of the cosmic dark ages. In past treatments of 21-cm radiation it was assumed the hyperfine level populations of HI could be characterized by a velocity-independent ``spin temperature'' T_s determined by a competition between 21-cm radiative transitions, spin-changing collisions, and (at lower redshifts) Lyman-alpha scattering. However we show here that, if the collisional time is comparable to the radiative time, the spin temperature will depend on atomic velocity, T_s=T_s(v), and one must replace the usual hyperfine level rate equations with a Boltzmann equation describing the spin and velocity dependence of the HI distribution function. We construct here the Boltzmann equation relevant to the cosmic dark ages and solve it using a basis-function method. Accounting for the actual spin-resolved atomic velocity distribution results in up to a 2 per cent suppression of the 21-cm emissivity, and a redshift and angular-projection dependent suppression or enhancement of the linear power spectrum of 21-cm fluctuations of up to 5 per cent. The effect on the 21-cm line profile is more dramatic -- its full-width at half maximum (FWHM) can be enhanced by up to 60 per cent relative to the velocity-independent calculation. We discuss the implications for 21-cm tomography of the dark ages.
description: 25 pages, 6 figures, submitted to Mon. Not. Roy. Astron. Soc
Online Extrinsic Calibration based on Per-Sensor Ego-Motion Using Dual Quaternions
Creators: name: Horn, Markus
name: Wodtko, Thomas
name: Buchholz, Michael
name: Dietmayer, Klaus
Publisher: name: arXiv
Year: 2021
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: In this work, we propose an approach for extrinsic sensor calibration from per-sensor ego-motion estimates. Our problem formulation is based on dual quaternions, enabling two different online capable solving approaches. We provide a certifiable globally optimal and a fast local approach along with a method to verify the globality of the local approach. Additionally, means for integrating previous knowledge, for example, a common ground plane for planar sensor motion, are described. Our algorithms are evaluated on simulated data and on a publicly available dataset containing RGB-D camera images. Further, our online calibration approach is tested on the KITTI odometry dataset, which provides data of a lidar and two stereo camera systems mounted on a vehicle. Our evaluation confirms the short run time, state-of-the-art accuracy, as well as online capability of our approach while retaining the global optimality of the solution at any time.
description: 8 pages, 6 figures, 2 tables, published in RA-L
THE PROBLEM OF SMALL FOOTPRINTS IN PALEOICHNOLOGY: REMARKS ON THE EARLY PERMIAN ICHNOTAXON  ERPETOPUS CASSINISI, A LOCAL SPECIES FROM SOUTHERN ALPS (NORTHERN ITALY)
Creators: name: MARCHETTI, LORENZO
name: SANTI, GIUSEPPE
name: AVANZINI, MARCO
Publisher: name: Università degli Studi di Milano
Year: 2014

description: Based on well-preserved specimens, and strictly considering the influence of extramorphological (substrate-related) factors, the use of modern techniques (computer drawings, 3D acquisitions), permitted a reliable study on footprints smaller than 20 mm. Footprints of this size were mostly considered as too small and being affected by a lot of deformation, thus preventing a substantiated analysis. Our case study focuses on the Erpetopus/Camunipes dualism. Ichnologists disagree on the value of a separation of these ichnogenera, and their discussion appears rather "philosophical" than being conducted by an accurate analysis and objective data. We restudied the holotype of Camunipes cassinisi (sp. MBS 319), together with a new specimen from Southern Alps (sp. MBG 12465) that shows five well-preserved long trackways, and compared them to selected material, including the Erpetopus willistoni holotype (sp. UGKU C-8). Results suggest a synonymy of Camunipes with Erpetopus and the new combination Erpetopus cassinisi which is distinct from E. willistoni by the following anatomical features: the pes of E. cassinisi shows higher divarication angles between digits IV-V (>50°) and I-V (>130°) and a longer and variably oriented digit V, which is long about as digit II. This has interesting paleobiogeographical consequences: E. cassinisi was probably a local ichnospecies of Erpetopus in the Southern Alps.
description: Rivista italiana di Paleontologia e Stratigrafia, Vol 120, No 2
Magnetic field dependence of hole levels in self-assembled InAs quantum dots
Creators: name: Climente, J. I.
name: Planelles, J.
name: Pi, M.
name: Malet, F.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Recent magneto-transport experiments of holes in InGaAs quantum dots [D. Reuter, P. Kailuweit, A.D. Wieck, U. Zeitler, O. Wibbelhoff, C. Meier, A. Lorke, and J.C. Maan, Phys. Rev. Lett. 94, 026808 (2005)] are interpreted by employing a multi-band kp Hamiltonian, which considers the interaction between heavy hole and light hole subbands explicitely. No need of invoking an incomplete energy shell filling is required within this model. The crucial role we ascribe to the heavy hole-light hole interaction is further supported by one-band local-spin-density functional calculations, which show that Coulomb interactions do not induce any incomplete hole shell filling and therefore cannot account for the experimental magnetic field dispersion.
description: 5 pages with 3 figures and one table. The paper has been submitted to Phys.Rev.B