cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
On the convergence of the regularized entropy-based moment method for kinetic equations
Creators: name: Alldredge, Graham W.
name: Frank, Martin
name: Giesselmann, Jan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Numerical Analysis (math.NA)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: The entropy-based moment method is a well-known discretization for the velocity variable in kinetic equations which has many desirable theoretical properties but is difficult to implement with high-order numerical methods. The regularized entropy-based moment method was recently introduced to remove one of the main challenges in the implementation of the entropy-based moment method, namely the requirement of the realizability of the numerical solution. In this work we use the method of relative entropy to prove the convergence of the regularized method to the original method as the regularization parameter goes to zero and give convergence rates. Our main assumptions are the boundedness of the velocity domain and that the original moment solution is Lipschitz continuous in space and bounded away from the boundary of realizability. We provide results from numerical simulations showing that the convergence rates we prove are optimal.
Thermodynamics and Structure of Lanthanide and Actinide Silicates and Phosphates Under Extreme Conditions
Creators: name: Strzelecki, Andrew Charles
Publisher: name: Washington State University
Year: 2024
Subjects: subject: Ceramic Waste Forms
subject: Environmental Barrier Coatings
subject: Rare Earth Minerals
subject: Chemistry
subject: Crystallography
subject: Geochemistry
subject: FOS: Earth and related environmental sciences
subject: Thermodynamics

description: Lanthanide and actinide silicates and phosphates possessing the zircon structure were of primary interest to this dissertation because of their diverse chemical and physical properties, including compositional flexibility, low chemical reactivity, and high thermal stability. This lends zircon structure-type materials to be of interest to a wide variety of applications/fields, including ceramic nuclear waste forms, environmental barrier coating, and sourcing of rare earth elements. Lanthanide silicate materials possessing the apatite structure materials were also investigated in detail as they are found to be a common degradation product of zircon structured materials, indicating an energetic relationship. The materials investigated included CeSiO4, A-Ce2Si2O7, Ce4.67(SiO4)3O, USiO4, Ca2Pr8(SiO4)6O2, Ca2Tb8(SiO4)6O2, Ca2Ho8(SiO4)6O2, Ca2Tm8(SiO4)6O2, and Er(x)Yb(1-x)PO4. The methods used were oxide melt drop solution calorimetry, differential scanning calorimetry coupled with thermogravimetric analysis (TG-DSC), X-ray diffraction, and vibrational spectroscopic techniques. This allowed for the thermodynamics and structures of these materials at high temperature (T > 100°C) and pressure (P > 1 GPa) conditions to be assessed.
description: The major findings of this dissertation have been determining the standard enthalpies of formation, ΔHf (kJ/mol), of CeSiO4 (-1971.9 ± 3.6 kJ/mol), A-Ce2Si2O7 (-3825.1 ± 6.0 kJ/mol), Ce4.67(SiO4)3O (-7391.3 ± 9.5 kJ/mol), Ca2Pr8(SiO4)6O2 (-14739.1 ± 23.7 kJ/mol), Ca2Tb8(SiO4)6O2 (-14834.1± 23.9 kJ/mol), Ca2Ho8(SiO4)6O2 (-14909.7 ± 19.6 kJ/mol), Ca2Tm8(SiO4)6O2 (-14694.3 ± 12.8 kJ/mol). This information was valuable in assessing the energetic landscapes of zircon and apatite structured materials. The enthalpy of mixing, ΔHmix (kJ/mol), and interaction parameter, Wx = 20.3 ± 0.8 kJ/mol, for Er(x)Yb(1-x)PO4 was determined to be weakly endothermic. Such implies that entropy of mixing, ΔSmix (kJ/mol), is the dominating factor which controls the thermodynamic stability of ErPO4-YbPO4. Next, a combination of TG-DSC, X-ray diffraction, and vibrational spectroscopy found that the zircon structured (CeSiO4, USiO4, Er(x)Yb(1-x)PO4) materials can host occluded molecular water in it (001) channel. This occluded molecular water was found to have profound effects on the lattice at high temperatures. Lastly, zircon structured CeSiO4 at high-pressure was found to exhibit the high pressure low-symmetry (HPLS) phase transition before converting to the scheelite structure. This offers one of the first experimental examples of this phase transition occurring outside of ZrSiO4.
Torsional Deformation of Nonrelativistic String Theory
Creators: name: Yan, Ziqi
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Nonrelativistic string theory is a self-contained corner of string theory, with its string spectrum enjoying a Galilean-invariant dispersion relation. This theory is unitary and ultraviolet complete, and can be studied from first principles. In these notes, we focus on the bosonic closed string sector. In curved spacetime, nonrelativistic string theory is defined by a renormalizable quantum nonlinear sigma model in background fields, following certain symmetry principles that disallow any deformation towards relativistic string theory. We review previous proposals of such symmetry principles and propose a modified version that might be useful for supersymmetrizations. The appropriate target-space geometry determined by these local spacetime symmetries is string Newton-Cartan geometry. This geometry is equipped with a two-dimensional foliation structure that is restricted by torsional constraints. Breaking the symmetries that give rise to such torsional constraints in the target space will in general generate quantum corrections to a marginal deformation in the worldsheet quantum field theory. Such a deformation induces a renormalization group flow towards sigma models that describe relativistic strings.
description: 37 pages; v2: published version
Strategic directions for use of agricultural lands
Creators: name: S. N. Volkov
name: E. V. Cherkashina
name: K. T. Vasilchenko
Publisher: name: International   Agricultural   Journal
Year: 2018
Subjects: agricultural lands
efficient use
agro-industrial complex
stability
efficiency
competitiveness

description: The rational use and protection of agricultural lands is one of the key conditions for the accelerated growth of agro-industrial complex of the Russian Federation, increase of its stability, efficiency, competitiveness and ecological safety at the modern stage of innovative direction of development of the country’s economy. Lands use and condition analysis proved that as of 01.01.2018 more then 50 million ha of agricultural lands were not used, areas of irrigated and drained lands are reduced, out of 11.3 million ha of reclaimed areas 33.3% are in an unsatisfactory condition, 13130.1 thousand ha of unclaimed land shares are abandoned and unrecorded, 1062.5 thousand ha of lands are disturbed, crop rotation on area of 70.65 million ha (89 % of arable lands) is disturbed, agricultural lands continue to be degraded, bushed and overgrown with low forest cover, desertification processes are developed, 60% of agricultural lands are eroded, waterlogged, salt-affected and etc. The urgent necessity arises to define the list of priority strategic challenges, economical, organizational and administrative, legal and other kind of mechanisms, as well as the state activities and instruments ensuring the potentially productive use of agricultural lands. The land administration of the efficient use and protection of agricultural lands is one of the most important mechanisms.
Deep Learning-Based Active User Detection for Grant-free SCMA Systems
Creators: name: Sivalingam, Thushan
name: Ali, Samad
name: Mahmood, Nurul Huda
name: Rajatheva, Nandana
name: Latva-Aho, Matti
Publisher: name: arXiv
Year: 2021
Subjects: subject: Information Theory (cs.IT)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Grant-free random access and uplink non-orthogonal multiple access (NOMA) have been introduced to reduce transmission latency and signaling overhead in massive machine-type communication (mMTC). In this paper, we propose two novel group-based deep neural network active user detection (AUD) schemes for the grant-free sparse code multiple access (SCMA) system in mMTC uplink framework. The proposed AUD schemes learn the nonlinear mapping, i.e., multi-dimensional codebook structure and the channel characteristic. This is accomplished through the received signal which incorporates the sparse structure of device activity with the training dataset. Moreover, the offline pre-trained model is able to detect the active devices without any channel state information and prior knowledge of the device sparsity level. Simulation results show that with several active devices, the proposed schemes obtain more than twice the probability of detection compared to the conventional AUD schemes over the signal to noise ratio range of interest.
description: Accepted for 2021 IEEE 32nd Annual International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC)
Information support of inventory development of the mining territories
Creators: name: A. A. Murasheva
name: V. E. Konovalov
name: D. A. Shapovalov
name: P. P. Lepekhin
name: A. О. Khutorova
Publisher: name: International   Agricultural   Journal
Year: 2018
Subjects: information support
landscapes
mining areas
sustainable development
cadaster

description: Ensuring the safety and well-being of the population when using the territories, especially in the interests of future generations, is a priority aspect of sustainable development of the territory. Mineral extraction is accompanied by a rapid transformation of the lithosphere and changes in the earth's surface and the seabed, water bodies and watercourses on site, subject to the influence of the mining industry, leading to the disruption of natural landscapes and formation of a new, anthropogenic forms of relief, i.e. the formation of specific industrial landscapes mining landscapes, which has a significant impact on the sustainable development of such areas. In this study, the information support of sustainable development of landscapes of mining areas on the basis of the formation of a special inventory is considered.
To freeze or not to: Quantum correlations under local decoherence
Creators: name: Chanda, Titas
name: Pal, Amit Kumar
name: Biswas, Anindya
name: De, Aditi Sen
name: Sen, Ujjwal
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Physics (quant-ph)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We provide necessary and sufficient conditions for freezing of quantum correlations as measured by quantum discord and quantum work deficit in the case of bipartite as well as multipartite states subjected to local noisy channels. We recognize that inhomogeneity of the magnetizations of the shared quantum states plays an important role in the freezing phenomena. We show that the frozen value of the quantum correlation and the time interval for freezing follow a complementarity relation. For states which do not exhibit "exact" freezing, but can be frozen "effectively", by having a very slow decay rate with suitable tuning of the state parameters, we introduce an index -- the freezing index -- to quantify the goodness of freezing. We find that the freezing index can be used to detect quantum phase transitions and discuss the corresponding scaling behavior.
description: 14 pages, 9 figures, close to published version, title changed by Phys. Rev. A. to 'Freezing of quantum correlations under local decoherence'
COVID19 no Alentejo: breves notas sobre territórios de baixa densidade e o seu futuro
Creators: name: Carmo, André
name: Rêgo, Patrícia
Publisher: name: Finisterra
Year: 2020

description: Desde o início da pandemia que, no contexto de Portugal continental, a região do Alentejo se destacou pelo facto de ser aquela que apresenta o menor número de casos confirmados e de óbitos por covid19. Embora existam outros aspetos a considerar, a baixa densidade populacional que caracteriza o Alentejo será sempre um elemento chave para compreender a evolução da pandemia. Tomando este fenómeno eminentemente geográfico como pretexto, este artigo, que se desenrola em três momentos, começa por levar a cabo uma reflexão sobre os territórios de baixa densidade em Portugal continental, para, depois, ensaiar uma aproximação ao modo como o covid19 se tem manifestado na região do Alentejo e, por fim, abordar a problemática do desenvolvimento futuro dos territórios de baixa densidade, tendo em conta o potencial que estes encerram.
description: Finisterra, vol. 55 n.º 115 (AOP) (2020): Número especial: COVID-19
Mobile-Aware Scheduling for Low Latency Backhaul over DOCSIS
Creators: name: Andreoli-Fang, Jennifer
name: Chapman, John T
Publisher: name: arXiv
Year: 2022
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: In this paper, we discuss latency reduction techniques for mobile backhaul over Data Over Cable Service Interface Specifications (DOCSIS) networks. When the latencies from both the wireless and the DOCSIS networks are added together, it can result in noticeable end-to-end system latency, particularly under network congestion. Previously, we proposed a method to improve upstream user-to-mobile core latency by coordinating the LTE and DOCSIS scheduling. The method reduces the impact on system latency from the DOCSIS network's request-grant-data loop, which is the main contributor of backhaul upstream latency. Since the method reduces latency on the DOCSIS data path, it will therefore improve performance of latency sensitive applications, particularly if TCP is used as the transport protocol, especially when the link is congested. In this paper, we investigate the effect of HARQ failure on system performance. Through simulation, we show that despite the uncertainty introduced by the LTE protocol, coordinated scheduling improves overall system latency.
description: IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC), 2017
Recent progress in biomedical and biotechnological applications of lignin-based spherical nano- and microstructures: a comprehensive review
Creators: name: Stanisz, Martin
name: Klapiszewski, L.
name: COLLINS, MAURICE
name: Jesionowski, Teofil
Publisher: name: University of Limerick
Year: 2023
Subjects: Engineering

description: Spherical particles based on materials of natural origin have recently gained increased attention because of their unique properties, including shape, structure, and ability to combine with other materials. Lignin has potential to be applied across multiple sectors, with recent focus on its valorization in high end application routes which favor its renewability, biocompatibility, and non-toxicity. The most promising findings are reported, that spherical lignin particles are a very effective carrier and delivery vehicle for active pharmaceutical ingredients for the treatment of various diseases, including cancers etc. Due to recent developments, lignin can be successfully used for accelerated wound healing and for growth inhibition against a variety of bacterial strains taking advantage of its inherent antimicrobial and anti-oxidant properties. Notably, lignin particles are also finding opportunities in the agrochemical industry, taking advantage of a combination of properties such as high stability, composability, and the possibility of encapsulation of pesticides and fungicides without increased pollution of the environment. The presented review aims to discuss the impact of recent developments related to lignin-based spherical particles on novel biomedical and biotechnological application, which may provide guidance for future possibilities for the valorization of lignin
ABRF PRG STUDY TO EVALUATE DATA-INDEPENDENT ACQUISITION FOR PROTEIN QUANTIFICATION IN CORE FACILITY SETTINGS
Creators: name: Wang, Yan
name: Kirkpatrick, Joanna
name: Neely, Benjamin
name: Martin, LeRoy
name: Chien, Allis
name: Herring, Laura
name: Midha, Mukul
name: Phinney, Brett S.
name: Shan, Baozhen
name: Stemmer, Paul M.
name: Jagtap, Pratik D.
Publisher: name: Zenodo
Year: 2020
Subjects: Proteomics
DIA (Data Inedpendent Acquisition)
multi-lab study

description: The field of proteomics is on the cusp of realizing the promise of Data-Independent Acquisition (DIA), but there is still a need to develop best practices and improve opportunity for adoption. The Proteomics Research Group (PRG) within the Association of Biomolecular Resource Facilities (ABRF) conducted a study to promote adoption of DIA. We developed a study sample set consisting of a HeLa digest spiked with four non-human proteins at different concentrations. These samples were sent to 63 labs from 20 countries around the globe. We provided participants recommended LC gradients and DIA methods for specific instrument platforms, as well as guidelines for method generation on other platforms. Samples were injection-ready, and data was analyzed by PRG members. Of the 63 labs, 40 labs uploaded data as of January 2019, 53 labs filled out survey, and 35 data sets were used for preliminary analysis. Based on survey information, most participants were experienced LCMS users, but few had previously used DIA. Data from most participants reflects expected fold-change of spike-in proteins. Interestingly, accuracy of quantitation was not correlated to previous DIA experience. Overall, by providing a standard sample set and recommended methods for different instrument platforms, and extended trial software licenses for users, the PRG provided an opportunity for labs to evaluate their readiness to carry out DIA analysis. Ongoing work will analyze the complete data set as more labs completed the study after this pilot analysis, providing additional opportunities to evaluate LC and instrument parameters.
Quantum mechanics as a deterministic theory of a continuum of worlds
Creators: name: Boström, Kim Joris
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A non-relativistic quantum mechanical theory is proposed that describes the universe as a continuum of worlds whose mutual interference gives rise to quantum phenomena. A logical framework is introduced to properly deal with propositions about objects in a multiplicity of worlds. In this logical framework, the continuum of worlds is treated in analogy to the continuum of time points, both "time" and "world" are considered as mutually independent modes of existence. The theory combines elements of Bohmian mechanics and of Everett's many-worlds interpretation, it has a clear ontology and a set of precisely defined postulates from where the predictions of standard quantum mechanics can be derived. Probability as given by the Born rule emerges as a consequence of insufficient knowledge of observers about which world it is that they live in. The theory describes a continuum of worlds rather than a single world or a discrete set of worlds, so it is similar in spirit to many-worlds interpretations based on Everett's approach, without being actually reducible to these. In particular, there is no splitting of worlds, which is a typical feature of Everett-type theories. Altogether, the theory explains (1) the subjective occurrence of probabilities, (2) their quantitative value as given by the Born rule, and (3) the apparently random "collapse of the wavefunction" caused by the measurement, while still being an objectively deterministic theory.
description: fourth and final revision, this paper is a thoroughly reworked and enhanced formulation of ideas originally published in 2012 as a preprint in arXiv1208.5632, it has been published as a regular article in 2015 in Quantum Studies: Mathematics and Foundations
NEXUS BETWEEN PERCEIVED SERVICE QUALITY, ELECTRONIC HUMAN RESOURCES MANAGEMENT USAGE, EXTRA- ROLE PERFORMANCE AND CUSTOMER SATISFACTION
Creators: name: FARHANA JESMIN
name: MOHAMMAD SHARIFUL ISLAM
name: A.K.M MONIRUZZAMAN, PHD
Publisher: name: Zenodo
Year: 2023
Subjects: Customer Satisfaction, Perceived Service Quality, Electronic HRM, and Extra-Role Performance, Banks.

description: Abstract
Customer is the key stimuli of agile business environment. Due to cutthroat competition, this has become a compulsion for service-oriented businesses to retain supreme level of satisfaction. While many previous studies unveiled unidimensional service quality and customer satisfaction, the present research has attempted to discover the role of perceived service quality, electronic, Electronic human resources management(Electronic HRM), and extra-role performance in a three-tier association with customer satisfaction under the lens of satisfaction-motivation theories. In order to attain the objective, the judgmental purposive sampling technique was applied to select 350 responses from 25 private commercial banks. The study employed a Likert 5-point scale and adapted measurement drivers from previous studies. The studies found that perceived service quality and extra-role performance significantly impact customer satisfaction and electronic HRM usage has no influence. Theoretical contributions and management applications of the findings are examined further. The study's findings will be a vital tool for industry, managers. After the conclusion, the future directions and implications are articulated.
Coherent presentations of monoids with a right-noetherian Garside family
Creators: name: Curien, Pierre-Louis
name: Ðurić, Alen
name: Guiraud, Yves
Publisher: name: arXiv
Year: 2021
Subjects: subject: Group Theory (math.GR)
subject: Category Theory (math.CT)
subject: FOS: Mathematics
subject: 20M05, 18B40, 18N30, 20F36, 68Q42

description: This paper shows how to construct coherent presentations (presentations by generators, relations and relations among relations) of monoids admitting a right-noetherian Garside family. Thereby, it resolves the question of finding a unifying generalisation of the following two distinct extensions of construction of coherent presentations for spherical Artin-Tits monoids: to general Artin-Tits monoids, and to Garside monoids. The result is applied to some monoids which are neither Artin-Tits nor Garside.
Pricing multi-asset contingent claims in a multi-dimensional binomial market
Creators: name: Kędra, Jarek
name: Libman, Assaf
name: Steblovskaya, Victoria
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mathematical Finance (q-fin.MF)
subject: Optimization and Control (math.OC)
subject: Probability (math.PR)
subject: Pricing of Securities (q-fin.PR)
subject: FOS: Economics and business
subject: FOS: Mathematics

description: We consider an incomplete multi-asset binomial market model. We prove that for a wide class of contingent claims the extremal multi-step martingale measure is a power of the corresponding single-step extremal martingale measure. This allows for closed form formulas for the bounds of a no-arbitrage contingent claim price interval. We construct a feasible algorithm for computing those boundaries as well as for the corresponding hedging strategies. Our results apply, for example, to European basket call and put options and Asian arithmetic average options.
description: 30 pages; title slightly changed
Stylized facts in Brazilian vote distributions
Creators: name: Calvão, Angelo Mondaini
name: Crokidakis, Nuno
name: Anteneodo, Celia
Publisher: name: arXiv
Year: 2014
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Social and Information Networks (cs.SI)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Elections, specially in countries such as Brazil with an electorate of the order of 100 million people, yield large-scale data-sets embodying valuable information on the dynamics through which individuals influence each other and make choices. In this work we perform an extensive analysis of data sets available for Brazilian proportional elections of legislators and city councillors throughout the period 1970-2012, which embraces two distinct political regimes: a military dictatorship and a democratic phase. Through the distribution $P(v)$ of the number of candidates receiving $v$ votes, we perform a comparative analysis of different elections in the same calendar and as a function of time. The distributions $P(v)$ present a scale-free regime with a power-law exponent $α$ which is not universal and appears to be characteristic of the electorate. Moreover, we observe that $α$ typically increases with time. We propose a multi-species model consisting in a system of nonlinear differential equations with stochastic parameters that allows to understand the empirical observations. We conclude that the power-law exponent $α$ constitutes a measure of the degree of feedback of the electorate interactions. To know the interactivity of the population is relevant beyond the context of elections, since a similar feedback may occur in other social contagion processes.
description: 8 pages, 8 figures, a version with some modifications was published in PLoS ONE
SynthSeg: Segmentation of brain MRI scans of any contrast and resolution without retraining
Creators: name: Billot, Benjamin
name: Greve, Douglas N.
name: Puonti, Oula
name: Thielscher, Axel
name: Van Leemput, Koen
name: Fischl, Bruce
name: Dalca, Adrian V.
name: Iglesias, Juan Eugenio
Publisher: name: arXiv
Year: 2021
Subjects: subject: Image and Video Processing (eess.IV)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Despite advances in data augmentation and transfer learning, convolutional neural networks (CNNs) difficultly generalise to unseen domains. When segmenting brain scans, CNNs are highly sensitive to changes in resolution and contrast: even within the same MRI modality, performance can decrease across datasets. Here we introduce SynthSeg, the first segmentation CNN robust against changes in contrast and resolution. SynthSeg is trained with synthetic data sampled from a generative model conditioned on segmentations. Crucially, we adopt a domain randomisation strategy where we fully randomise the contrast and resolution of the synthetic training data. Consequently, SynthSeg can segment real scans from a wide range of target domains without retraining or fine-tuning, which enables straightforward analysis of huge amounts of heterogeneous clinical data. Because SynthSeg only requires segmentations to be trained (no images), it can learn from labels obtained by automated methods on diverse populations (e.g., ageing and diseased), thus achieving robustness to a wide range of morphological variability. We demonstrate SynthSeg on 5,000 scans of six modalities (including CT) and ten resolutions, where it exhibits unparalleled generalisation compared with supervised CNNs, state-of-the-art domain adaptation, and Bayesian segmentation. Finally, we demonstrate the generalisability of SynthSeg by applying it to cardiac MRI and CT scans.
“Short stops” and “footnotes”: end-of-life care and recently qualified doctors
Creators: name: Sweeney, Catherine
name: Bennett, Deirdre
name: O'Brien, Tony
Publisher: name: F1000 Research Limited
Year: 2023

description: Culture influences learning in the healthcare workplace. We interviewed recently qualified doctors (RQDs) about end of life care and used Communities of Practice and Landscapes of Practice theories as a lens to analyse the data. Our findings identify sociocultural factors that lead to tacit learning and provide insights into the concerns of RQDs
Sur la lissité du schéma Quot ponctuel emboîté
Creators: name: Monavari, Sergej
name: Ricolfi, Andrea T.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics

description: In this paper we characterise the smoothness of the nested Quot scheme of points of a smooth variety, namely the moduli space parametrising flags of $0$-dimensional quotients of a fixed locally free sheaf. Our results extend Cheah's classification of smooth nested Hilbert schemes. -- Dans cet article on caractérise la lissité du schéma Quot ponctuel emboîté d'une variété lisse, c'est-à-dire l'espace de modules paramétrant les drapeaux de quotients de dimension $0$ d'un faisceau localement libre fixé. Nos résultats étendent la classification de Cheah concernant les schémas de Hilbert ponctuels emboîtés.
description: 7 pages, in French; comments welcome!
Low Latency Techniques for Mobile Backhaul over DOCSIS
Creators: name: Chapman, John T
name: Andreoli-Fang, Jennifer
name: Chauvin, Michel
name: Reyes, Elias Chavarria
name: Lu, Zheng
name: Liu, Dantong
name: Padden, Joey
name: Bernstein, Alon
Publisher: name: arXiv
Year: 2022
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: The mobile network operators (MNOs) are looking into economically viable backhaul solutions as alternatives to fiber, specifically the hybrid fiber coaxial networks (HFC). When the latencies from both the wireless and the HFC networks are added together, the result is a noticeable end-to-end system latency, particularly under network congestion. In order to decrease total system latency, we proposed a method to improve upstream user- to-mobile core latency by coordinating the LTE and HFC scheduling in previous papers. In this paper, we implement and optimize the proposed method on a custom LTE and DOCSIS end-to-end system testbed. The testbed uses the OpenAirInterface (OAI) platform for the LTE network, along with Cisco's broadband router cBR-8 that is currently deployed in the HFC networks around the world. Our results show a backhaul latency improvement under all traffic load conditions.
description: IEEE Wireless Communications and Networking Conference (WCNC), 2018. arXiv admin note: text overlap with arXiv:2211.08292
On the equivalence between non-factorizable mixed-strategy classical games and quantum games
Creators: name: Iqbal, Azhar
name: Chappell, James M.
name: Abbott, Derek
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A game-theoretic setting provides a mathematical basis for analysis of strategic interaction among competing agents and provides insights into both classical and quantum decision theory and questions of strategic choice. An outstanding mathematical question, is to understand the conditions under which a classical game-theoretic setting can be transformed to a quantum game, and under which conditions there is an equivalence. In this paper, we consider quantum games as those that allow non-factorizable probabilities. We discuss two approaches for obtaining a non-factorizable game and study the outcome of such games. We demonstrate how the standard version of a quantum game can be analyzed as a non-factorizable game and determine the limitations of our approach.
description: Revised, 15 pages
A note on circular wirelength for hypercubes
Creators: name: Liu, Qinghui
name: Tang, Zhiyi
Publisher: name: arXiv
Year: 2021
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05C60, 68R10

description: We study embeddings of the $n$-dimensional hypercube into the circuit with $2^n$ vertices. We prove that the circular wirelength attains minimum by gray coding, which is called the CT conjecture by Chavez and Trapp (Discrete Applied Mathematics, 1998). This problem had claimed to be settled by Ching-Jung Guu in her doctor dissertation "The circular wirelength problem for hypercubes" (University of California, Riverside, 1997). Many people argue there are gaps in her proof. We eliminate gaps in her dissertation.
Subtotal parotidectomy with facial nerve preservation. A case report
Creators: name: Raúl Armando Carpinteyro Espinoza M.D.
name: Oscar Escalera Vargas M.D.
name: Marco Uriel Paniagua Tapia M.D.
name: Carlos Adrián Torrejón Hernández M.D.
name: Mayerlin Calvache Muñoz M.D.
name: Ricardo Valdez Torres M.D.
name: Paulina Denisse Rivera Bernal M.D.
name: Samantha Castro Cortés M.D.
Publisher: name: Zenodo
Year: 2023

description: Background
We present a clinical case of a 60-year-old female patient with a parotid tumor which is scheduled for partial resection and an adequate dissection of the nerve and identification of the 5 branches is observed. In this article we try to present the theory and its adequate application to clinical practice in a surgery as delicate as a superficial parotidectomy. An adequate post-surgical performance of the patient was demonstrated and trans-surgical images and subsequent results are presented.
 
Keywords: Subtotal parotidectomy, Facial nerve, Pleomorphic adenoma.
Quality control and removal of technical variation of NMR metabolic biomarker data in ~120,000 UK Biobank participants.
Creators: name: Ritchie, Scott C
name: Surendran, Praveen
name: Karthikeyan, Savita
name: Lambert, Samuel A
name: Bolton, Thomas
name: Pennells, Lisa
name: Danesh, John
name: Di Angelantonio, Emanuele
name: Butterworth, Adam S
name: Inouye, Michael
Publisher: name: Apollo - University of Cambridge Repository
Year: 2023
Subjects: Humans
Biological Specimen Banks
Magnetic Resonance Imaging
Magnetic Resonance Spectroscopy
Quality Control
United Kingdom

description: Funder: S.C.R was funded by the National Institute for Health and Care Research (NIHR) Cambridge Biomedical Research Centre (BRC) (BRC-1215-20014) and by the British Heart Foundation (BHF) programme grant (RG/18/13/33946).
description: Funder: Praveen Surendran was supported by a Rutherford Fund Fellowship from the Medical Research Council grant MR/S003746/1
description: Funder: Savita Karthikeyan was funded by a British Heart Foundation Programme Grant (RG/18/13/33946)
description: Funder: Samuel A. Lambert was supported by a Canadian Institutes of Health Research postdoctoral fellowship (MFE-171279)
description: Funder: Thomas Bolton was funded by the NIHR Blood and Transplant Research Unit in Donor Health and Genomics (NIHR BTRU-2014-10024)
description: Funder: Lisa Pennells was funded by a British Heart Foundation Programme Grant (RG/18/13/33946)
description: Funder: John Danesh holds a British Heart Foundation Professorship and a NIHR Senior Investigator Award.
description: Funder: Michael Inouye is supported by the Munz Chair of Cardiovascular Prediction and Prevention and the NIHR Cambridge Biomedical Research Centre (BRC-1215-20014), and was also supported by the UK Economic and Social Research 878 Council (ES/T013192/1).
description: Metabolic biomarker data quantified by nuclear magnetic resonance (NMR) spectroscopy in approximately 121,000 UK Biobank participants has recently been released as a community resource, comprising absolute concentrations and ratios of 249 circulating metabolites, lipids, and lipoprotein sub-fractions. Here we identify and characterise additional sources of unwanted technical variation influencing individual biomarkers in the data available to download from UK Biobank. These included sample preparation time, shipping plate well, spectrometer batch effects, drift over time within spectrometer, and outlier shipping plates. We developed a procedure for removing this unwanted technical variation, and demonstrate that it increases signal for genetic and epidemiological studies of the NMR metabolic biomarker data in UK Biobank. We subsequently developed an R package, ukbnmr, which we make available to the wider research community to enhance the utility of the UK Biobank NMR metabolic biomarker data and to facilitate rapid analysis.
An asymptotic-preserving discretization scheme for gas transport in pipe networks
Creators: name: Egger, H.
name: Giesselmann, J.
name: Kunkel, T.
name: Philippi, N.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: We consider the simulation of barotropic flow of gas in long pipes and pipe networks. Based on a Hamiltonian reformulation of the governing system, a fully discrete approximation scheme is proposed using mixed finite elements in space and an implicit Euler method in time. Assuming the existence of a smooth subsonic solution bounded away from vacuum, a full convergence analysis is presented based on relative energy estimates. Particular attention is paid to establishing error bounds that are uniform in the friction parameter. As a consequence, the method and results also cover the parabolic problem arising in the asymptotic large friction limit. The error estimates are derived in detail for a single pipe, but using appropriate coupling conditions and the particular structure of the problem and its discretization, the main results directly generalize to pipe networks. Numerical tests are presented for illustration.
Invariant Solutions to the Strominger System on Complex Lie Groups and Their Quotients
Creators: name: Fei, Teng
name: Yau, Shing-Tung
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Differential Geometry (math.DG)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Using canonical 1-parameter family of Hermitian connections on the tangent bundle, we provide invariant solutions to the Strominger system on complex Lie groups. Both flat and non-flat cases are discussed in detail.
description: 11 pages, comments are welcome. Updates in v2: minor typos are corrected. Updates in v3: small revisions, to be consistent with published version
Verifying the Hilali conjecture up to formal dimension twenty
Creators: name: Cattalani, Spencer
name: Milivojević, Aleksandar
Publisher: name: arXiv
Year: 2022
Subjects: subject: Algebraic Topology (math.AT)
subject: FOS: Mathematics
subject: 55P62

description: We prove that in formal dimension $\leq 20$ the Hilali conjecture holds, i.e. that the total dimension of the rational homology bounds from above the total dimension of the rational homotopy for a simply connected rationally elliptic space.
description: 9 pages. Initiated as part of the Stony Brook Directed Reading Program, 2019. Published in Journal of Homotopy and Related Structures, 2020
Spatially non-uniform condensates emerge from dynamically arrested phase separation.
Creators: name: Erkamp, Nadia A
name: Sneideris, Tomas
name: Ausserwöger, Hannes
name: Qian, Daoyuan
name: Qamar, Seema
name: Nixon-Abell, Jonathon
name: St George-Hyslop, Peter
name: Schmit, Jeremy D
name: Weitz, David A
name: Knowles, Tuomas PJ
Publisher: name: Apollo - University of Cambridge Repository
Year: 2023
Subjects: Proteins
Nucleic Acids
Biopolymers
Thermodynamics

description: Funder: Frances and Augustus Newman Foundation; doi: https://doi.org/10.13039/100007898
description: Funder: EC | EC Seventh Framework Programm | FP7 Ideas: European Research Council (FP7-IDEAS-ERC - Specific Programme: 'Ideas' Implementing the Seventh Framework Programme of the European Community for Research, Technological Development and Demonstration Activities (2007 to 2013)); doi: https://doi.org/10.13039/100011199; Grant(s): FP7/2007-2013
description: The formation of biomolecular condensates through phase separation from proteins and nucleic acids is emerging as a spatial organisational principle used broadly by living cells. Many such biomolecular condensates are not, however, homogeneous fluids, but possess an internal structure consisting of distinct sub-compartments with different compositions. Notably, condensates can contain compartments that are depleted in the biopolymers that make up the condensate. Here, we show that such double-emulsion condensates emerge via dynamically arrested phase transitions. The combination of a change in composition coupled with a slow response to this change can lead to the nucleation of biopolymer-poor droplets within the polymer-rich condensate phase. Our findings demonstrate that condensates with a complex internal architecture can arise from kinetic, rather than purely thermodynamic driving forces, and provide more generally an avenue to understand and control the internal structure of condensates in vitro and in vivo.
Stochastic Discontinuous Galerkin Methods for Robust Deterministic Control of Convection Diffusion Equations with Uncertain Coefficients
Creators: name: Çiloğlu, Pelin
name: Yücel, Hamdullah
Publisher: name: arXiv
Year: 2021
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: We investigate a numerical behaviour of robust deterministic optimal control problem subject to a convection diffusion equation containing uncertain inputs. Stochastic Galerkin approach, turning the original optimization problem containing uncertainties into a large system of deterministic problems, is applied to discretize the stochastic domain, while a discontinuous Galerkin method is preferred for the spatial discretization due to its better convergence behaviour for optimization problems governed by convection dominated PDEs. Error analysis is done for the state and adjoint variables in the energy norm, while the estimates of deterministic control is obtained in the $L^2$--norm. Large matrix system emerging from the stochastic Galerkin method is addressed by the low--rank version of GMRES method, which reduces both the computational complexity and the memory requirements by employing Kronecker--product structure of the obtained linear system. Benchmark examples with and without control constraints are presented to illustrate the efficiency of the proposed methodology.
description: 41 pages, 8 figures, 7 tables
Prospects for joint gravitational wave and short gamma-ray burst observations
Creators: name: Clark, J.
name: Evans, H.
name: Fairhurst, S.
name: Harry, I. W.
name: Macdonald, E.
name: Macleod, D.
name: Sutton, P. J.
name: Williamson, A. R.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We present a detailed evaluation of the expected rate of joint gravitational-wave and short gamma-ray burst (GRB) observations over the coming years. We begin by evaluating the improvement in distance sensitivity of the gravitational wave search that arises from using the GRB observation to restrict the time and sky location of the source. We argue that this gives a 25% increase in sensitivity when compared to an all-sky, all-time search, corresponding to more than doubling the number of detectable gravitational wave signals associated with GRBs. Using this, we present the expected rate of joint observations with the advanced LIGO and Virgo instruments, taking into account the expected evolution of the gravitational wave detector network. We show that in the early advanced gravitational wave detector observing runs, from 2015-2017, there is only a small chance of a joint observation. However, as the detectors approach their design sensitivities, there is a good chance of joint observations provided wide field GRB satellites, such as Fermi and the Interplanetary Network, continue operation. The rate will also depend critically upon the nature of the progenitor, with neutron star--black hole systems observable to greater distances than double neutron star systems. The relative rate of binary mergers and GRBs will depend upon the jet opening angle of GRBs. Consequently, joint observations, as well as accurate measurement of both the GRB rate and binary merger rates, will allow for an improved estimation of the opening angle of GRBs.
description: 10 pages, 6 figures
Lifting differentiable curves from orbit spaces
Creators: name: Parusinski, Adam
name: Rainer, Armin
Publisher: name: arXiv
Year: 2014
Subjects: subject: Differential Geometry (math.DG)
subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: 22E45, 57S15, 14L24, 26A16

description: Let $ρ: G \rightarrow \operatorname{O}(V)$ be a real finite dimensional orthogonal representation of a compact Lie group, let $σ= (σ_1,\ldots,σ_n) : V \to \mathbb R^n$, where $σ_1,\ldots,σ_n$ form a minimal system of homogeneous generators of the $G$-invariant polynomials on $V$, and set $d = \max_i \operatorname{deg} σ_i$. We prove that for each $C^{d-1,1}$-curve $c$ in $σ(V) \subseteq \mathbb R^n$ there exits a locally Lipschitz lift over $σ$, i.e., a locally Lipschitz curve $\overline c$ in $V$ so that $c = σ\circ \overline c$, and we obtain explicit bounds for the Lipschitz constant of $\overline c$ in terms of $c$. Moreover, we show that each $C^d$-curve in $σ(V)$ admits a $C^1$-lift. For finite groups $G$ we deduce a multivariable version and some further results.
description: 25 pages; section on orbit spaces as differentiable spaces added, some typos corrected; accepted for publication in Transformation Groups
Challenging human locomotion
Creators: name: Santuz, Alessandro
name: Ekizos, Antonis
name: Eckardt, Nils
name: Kibele, Armin
name: Arampatzis, Adamantios
Publisher: name: Humboldt-Universität zu Berlin
Year: 2018
Subjects: subject: 570 Biowissenschaften; Biologie

description: The need to move over uneven terrain is a daily challenge. In order to face unexpected perturbations due to changes in the morphology of the terrain, the central nervous system must flexibly modify its control strategies. We analysed the local dynamic stability and the modular organisation of muscle activation (muscle synergies) during walking and running on an even- and an uneven-surface treadmill. We hypothesized a reduced stability during uneven-surface locomotion and a reorganisation of the modular control. We found a decreased stability when switching from even- to uneven-surface locomotion (p
Covariant Lyapunov Vectors of a Quasi-geostrophic Baroclinic Model: Analysis of Instabilities and Feedbacks
Creators: name: Schubert, Sebastian
name: Lucarini, Valerio
Publisher: name: arXiv
Year: 2014
Subjects: subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Chaotic Dynamics (nlin.CD)
subject: Fluid Dynamics (physics.flu-dyn)
subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: The classical approach for studying atmospheric variability is based on defining a background state and studying the linear stability of the small fluctuations around such a state. Weakly non-linear theories can be constructed using higher order expansions terms. While these methods have undoubtedly great value for elucidating the relevant physical processes, they are unable to follow the dynamics of a turbulent atmosphere. We provide a first example of extension of the classical stability analysis to a non-linearly evolving quasi-geostrophic flow. The so-called covariant Lyapunov vectors (CLVs) provide a covariant basis describing the directions of exponential expansion and decay of perturbations to the non-linear trajectory of the flow. We use such a formalism to re-examine the basic barotropic and baroclinic processes of the atmosphere with a quasi-geostrophic beta-plane two-layer model in a periodic channel driven by a forced meridional temperature gradient $ΔT$. We explore three settings of $ΔT$, representative of relatively weak turbulence, well-developed turbulence, and intermediate conditions. We construct the Lorenz energy cycle for each CLV describing the energy exchanges with the background state. A positive baroclinic conversion rate is a necessary but not sufficient condition of instability. Barotropic instability is present only for few very unstable CLVs for large values of $ΔT$. Slowly growing and decaying hydrodynamic Lyapunov modes closely mirror the properties of the background flow. Following classical necessary conditions for barotropic/baroclinic instability, we find a clear relationship between the properties of the eddy fluxes of a CLV and its instability. CLVs with positive baroclinic conversion seem to form a set of modes for constructing a reduced model of the atmosphere dynamics.
description: 50 pages, 10 figures