cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Scattershot multiboson correlation sampling with random photonic inner-mode multiplexing
Creators: name: Tamma, Vincenzo
name: Laibacher, Simon
Publisher: name: arXiv
Year: 2018
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Multiphoton interference is an essential phenomenon at the very heart not only of fundamental quantum optics and applications in quantum information processing and sensing but also of demonstrations of quantum computational supremacy in boson sampling experiments relying only on linear optical interferometers. However, scalable boson sampling experiments with either photon-number states or squeezed states are challenged by the need to generate a large number of photons with fixed temporal and frequency spectra from one experimental run to another. Unfortunately, even the well established standard multiplexing techniques employed to generate photons with fixed spectral properties are affected by the detrimental effects of losses, spectral distorsions and reduction in purity. Here, we employ sampling correlation measurements in the photonic inner modes, time and frequency, at the interferometer input and output to ensure the occurrence of multiphoton interference even with pure states of input photons with random spectral overlap from one sample to another. Indeed, by introducing a random multiplexing technique where photons are generated with random inner-mode parameters, it is possible to substantially enhance the probability to successfully generate samples and overcome the typical drawbacks in standard multiplexing. Remarkably, we demonstrate the classical hardness of the resulting problem of scattershot multiboson correlation sampling based on this technique. Therefore, these results not only shed new light in the computational complexity of multiboson interference but also allow us to enhance the experimental scalability of boson sampling schemes with the potential of future applications in quantum information processing and sensing even beyond boson sampling.
Additional file 4 of A brain cyst load-associated antigen is a Toxoplasma gondii biomarker for serodetection of persistent parasites and chronic infection
Creators: name: Dard, Céline
name: Swale, Christopher
name: Brenier-Pinchart, Marie-Pierre
name: Farhat, Dayana C.
name: Bellini, Valeria
name: Robert, Marie Gladys
name: Cannella, Dominique
name: Pelloux, Hervé
name: Tardieux, Isabelle
name: Hakimi, Mohamed-Ali
Publisher: name: figshare
Year: 2021
Subjects: subject: Immunology
subject: FOS: Clinical medicine

description: Additional file 4: Figure S3. Western blot evidence that rBCLA is reacting with sera of mice infected by cystogenic strains. Single western-blot strips were loaded with 0.5 μg of recombinant rBCLA. The strips were tested on sera collected from mice in acute and chronic phase of toxoplasmosis with various T. gondii strains, route of infection and mice genetic background. (a) Sera were collected from C57BL/6 mice 8 days post orally inoculation of 47 cysts of either type II (76K-GFP-luc)-WT or Δbcla strains. (b) Sera were collected from BALB/c mice 42 days post-intraperitoneal inoculation of 105 tachyzoites of the type II (76K-GFP-luc) strain. Reactivation was induced in chronically infected mice using corticosteroids. The serological status of the infected mice was determined by immunoblot using the LDBio Diagnostics test (lower panels).
Quantum toboggans with two branch points
Creators: name: Znojil, Miloslav
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Wave functions describing quantum toboggans with two branch points (QT2) are defined along complex contours of coordinates which spiral around these branch points. The classification of QT2 is found in terms of certain ``winding descriptors" $\varrho$. A mapping $x^{(\varrho)}(s) \to y^{(0)}(s)$ is then presented which rectifies the contours for a subset of the simplest $\varrho=\varrho_0$.
description: 19pp, 3 figs, presented also as a part of the lecture for QTS-5 conference in Valladolid, Spain, during July 22-28, 2007 (see its webpage http://tristan.fam.cie.uva.es/qts5)
Geometric optics and boundary layers for Nonlinear Schrodinger equations
Creators: name: Chiron, D.
name: Rousset, F.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: We justify supercritical geometric optics in small time for the defocusing semiclassical Nonlinear Schrodinger Equation for a large class of non-necessarily homogeneous nonlinearities. The case of a half-space with Neumann boundary condition is also studied.
description: 44 pages
Additional file 5 of A brain cyst load-associated antigen is a Toxoplasma gondii biomarker for serodetection of persistent parasites and chronic infection
Creators: name: Dard, Céline
name: Swale, Christopher
name: Brenier-Pinchart, Marie-Pierre
name: Farhat, Dayana C.
name: Bellini, Valeria
name: Robert, Marie Gladys
name: Cannella, Dominique
name: Pelloux, Hervé
name: Tardieux, Isabelle
name: Hakimi, Mohamed-Ali
Publisher: name: figshare
Year: 2021
Subjects: subject: Immunology
subject: FOS: Clinical medicine

description: Additional file 5: Figure S4. BCLA reactivity in human sera. (a) rBCLA reactivity detected by western blot. Serological reactivity is assessed by qualifying the presence or absence of the rBCLA band, positively revealed in black by anti-histidine HRP-conjugated Ab (his-rBCLA blot). Positively qualified blots are numbered in blue while negative or ambiguous blots are numbered in black, sample type is detailed by the letter S for serum or AH for aqueous humor. Blots are grouped according to clinical status of the patients. (b) Peptidic dot blots for 5 positive sera and one negative serum with peptide numbering and regions covered. On the right, ELISA titrations for rBCLA and SAG1 (Architect®) are shown for these same sera.
On approximations of Value at Risk and Expected Shortfall involving kurtosis
Creators: name: Barczy, Matyas
name: Dudas, Adam
name: Gall, Jozsef
Publisher: name: arXiv
Year: 2018
Subjects: subject: Risk Management (q-fin.RM)
subject: Probability (math.PR)
subject: Mathematical Finance (q-fin.MF)
subject: FOS: Economics and business
subject: FOS: Mathematics
subject: 91G70, 60E05, 62E17

description: We derive new approximations for the Value at Risk and the Expected Shortfall at high levels of loss distributions with positive skewness and excess kurtosis, and we describe their precisions for notable ones such as for exponential, Pareto type I, lognormal and compound (Poisson) distributions. Our approximations are motivated by that kind of extensions of the so-called Normal Power Approximation, used for approximating the cumulative distribution function of a random variable, which incorporate not only the skewness but the kurtosis of the random variable in question as well. We show the performance of our approximations in numerical examples and we also give comparisons with some known ones in the literature.
description: 30 pages, 11 figures
The nature of sub-millimetre galaxies II: an ALMA comparison of SMG dust heating mechanisms
Creators: name: Ansarinejad, B.
name: Shanks, T.
name: Bielby, R. M.
name: Metcalfe, N.
name: Infante, L.
name: Murphy, D. N. A.
name: Rosario, D. J.
name: Stach, S. M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We compare the contribution of Active Galactic Nuclei (AGN) and star-formation towards dust heating in sub-mm galaxies (SMGs). We have used ALMA at $0."1$ resolution to image a complete flux-limited sample of seven sub-mm sources previously shown to have spectral energy distributions (SEDs) that were as well-fitted by obscured AGN as star-forming galaxy templates. Indeed, two sub-mm sources were known to be quasars from their absorbed X-ray emission. We find the sub-mm sizes of all SMGs to be small ($\approx1-2$kpc) and generally $\sim3$ times smaller than any host detected in the Near-Infra-Red (NIR). In all cases, the five SMGs are comparable in sub-mm size to the two known quasars and four $z\approx6$ quasars, also observed with ALMA. We detect no evidence of diffuse spiral arms in this complete sample. We then convert the Far-Infra-Red (FIR) luminosities to star-formation rate (SFR) surface densities and find that the SMGs occupy the same range as the known quasars in our sample. We conclude that in terms of sub-mm size, extent relative to host and SFR density as well as luminosity and Mid-IR (MIR) colour, there is little distinction between the SMGs and sub-mm bright quasars. Finally, we present preliminary evidence that SMGs with higher MIR luminosities and sub-mm loud quasars tend to have dust components that range to hotter temperatures than their less luminous SMG counterparts. In light of these results, we continue to suggest that luminous SMGs may host dust-absorbed quasars that may simultaneously dominate the FIR and hard X-ray backgrounds.
description: 16 pages, 7 figures. Accepted for publication in MNRAS
Additional file 6 of A brain cyst load-associated antigen is a Toxoplasma gondii biomarker for serodetection of persistent parasites and chronic infection
Creators: name: Dard, Céline
name: Swale, Christopher
name: Brenier-Pinchart, Marie-Pierre
name: Farhat, Dayana C.
name: Bellini, Valeria
name: Robert, Marie Gladys
name: Cannella, Dominique
name: Pelloux, Hervé
name: Tardieux, Isabelle
name: Hakimi, Mohamed-Ali
Publisher: name: figshare
Year: 2021
Subjects: subject: Immunology
subject: FOS: Clinical medicine

description: Additional file 6: Figure S5. Global ELISA reactivity depending on the BCLA antigen composition. Violin plots show the distribution of ELISA reactivities (in UI) of Sag1 negative versus sag1 positive groups. rBCLA titrations are colored in blue while rBCLA combined with peptides ABf and A3b are shown in green. Both titrations were performed on the same sera and are an average of at least two independent measurements. Statistical significance in both cases is measured using a non-parametric Mann-Whitney test. P values and their corresponding significance is shown for the comparison between groups.
Transfer-Meta Framework for Cross-domain Recommendation to Cold-Start Users
Creators: name: Zhu, Yongchun
name: Ge, Kaikai
name: Zhuang, Fuzhen
name: Xie, Ruobing
name: Xi, Dongbo
name: Zhang, Xu
name: Lin, Leyu
name: He, Qing
Publisher: name: arXiv
Year: 2021
Subjects: subject: Information Retrieval (cs.IR)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Cold-start problems are enormous challenges in practical recommender systems. One promising solution for this problem is cross-domain recommendation (CDR) which leverages rich information from an auxiliary (source) domain to improve the performance of recommender system in the target domain. In these CDR approaches, the family of Embedding and Mapping methods for CDR (EMCDR) is very effective, which explicitly learn a mapping function from source embeddings to target embeddings with overlapping users. However, these approaches suffer from one serious problem: the mapping function is only learned on limited overlapping users, and the function would be biased to the limited overlapping users, which leads to unsatisfying generalization ability and degrades the performance on cold-start users in the target domain. With the advantage of meta learning which has good generalization ability to novel tasks, we propose a transfer-meta framework for CDR (TMCDR) which has a transfer stage and a meta stage. In the transfer (pre-training) stage, a source model and a target model are trained on source and target domains, respectively. In the meta stage, a task-oriented meta network is learned to implicitly transform the user embedding in the source domain to the target feature space. In addition, the TMCDR is a general framework that can be applied upon various base models, e.g., MF, BPR, CML. By utilizing data from Amazon and Douban, we conduct extensive experiments on 6 cross-domain tasks to demonstrate the superior performance and compatibility of TMCDR.
description: 5 pages, accepted by SIGIR2021
Exact dimer ground states for a continuous family of quantum spin chains
Creators: name: Asoudeh, M.
name: Karimipour, V.
name: Sadrolashrafi, A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Using the matrix product formalism, we define a multi-parameter family of spin models on one dimensional chains, with nearest and next-nearest neighbor anti-ferromagnetic interaction for which exact analytical expressions can be found for its doubly degenerate ground states. The family of Hamiltonians which we define, depend on 5 continuous parameters and the Majumdar-Ghosh model is a particular point in this parameter space. Like the Majumdar-Ghosh model, the doubly degenerate ground states of our models have a very simple structure, they are the product of entangled states on adjacent sites. In each of these states there is a non-zero staggered magnetization, which vanishes when we take their translation-invariant combination as the new ground states. At the Majumdar-Ghosh point, these entangled states become the spin-singlets pertaining to this model. We will also calculate in closed form the two point correlation functions, both for finite size of the chain and in the thermodynamic limit.
description: 11 pages
A way to hypo-elastic artificial materials without a strain potential and displaying flutter instability
Creators: name: Bordiga, G.
name: Piccolroaz, A.
name: Bigoni, D.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: Cauchy-elastic solids include hyper-elasticity and a subset of elastic materials for which the stress does not follow from a scalar strain potential. More in general, hypo-elastic materials are only defined incrementally and comprise Cauchy-elasticity. Infringement of the hyper-elastic 'dogma' is so far unattempted and normally believed to be impossible, as it apparently violates thermodynamics, because energy may be produced in closed strain cycles. Contrary to this belief, we show that non-hyper-elastic behavior is possible and we indicate the way to a practical realization of this new concept. In particular, a design paradigm is established for artificial materials where follower forces, so far ignored in homogenization schemes, are introduced as loads prestressing an elastic two-dimensional grid made up of linear elastic rods (reacting to elongation, flexure and shear). A rigorous application of Floquet-Bloch wave asymptotics yields an unsymmetric acoustic tensor governing the \textit{incremental} dynamics of the effective material. The latter is therefore the incremental response of a hypo-elastic solid, which does not follow from a strain potential and thus does not belong to hyper-elasticity. Through the externally applied follower forces (which could be originated via interaction with a fluid, or gas, or by application of Coulomb friction, or non-holonomic constraints), the artificial material may adsorb/release energy from/to the environment and therefore produce energy in a closed strain loop, without violating any rule of thermodynamics. The solid is also shown to display flutter, a material instability corresponding to a Hopf bifurcation, which was advocated as possible in plastic solids, but never experimentally found and so far believed to be impossible in elasticity.
description: 27 pages, 13 figures
Supplementary document for Angle measurement method of electronic speckle interferometry based on Michelson interferometer - 7432413.pdf
Creators: name: Zhu, Siyuan
name: Li, Tao
name: Chen, Zhongshan
name: Chen, Yan
name: Li, Xin
name: Chen, Ziping
name: XUDONG, LIN
Publisher: name: Optica Publishing Group
Year: 2025
Subjects: Uncategorized

description: Derivation of Formulas and Supplementary Raw Data
Advancing food and agribusiness management research: IFAMA 2020 best papers
Creators: name: Hasanov, Mustafa
name: Trienekens, Jacques
name: Dolfsma, Wilfred
name: Hasanov, Mustafa
name: Trienekens, Jacques
name: Dolfsma, Wilfred
Publisher: name: Unknown
Year: 2021
Subjects: subject: Agribusiness
subject: agri-food management
subject: agri-business
subject: IFAMA
subject: conference report
subject: best papers

description: This Special Issue presents the seven best papers from the 30th IFAMA 2020 World Congress, reflecting the richness and quality of the agri-food business and management scholarship that IFAMA facilitates and promotes. They reveal the diversity of research topics and current practices related to the most pressing agri-food business and management issues. Whether the papers discuss vegetable producers cooperatives in Cambodia, innovation intermarries and enhancing collaboration in Sweden, or information nudges in ornamental plant labeling in the United States, the papers in this Special Issue illustrate the need for variegated professional and academic skills and expertise represented in IFAMA.
Liberal equality rights : Ronald Dworkin’s jurisprudence
Creators: name: Naylor, Joseph Alan
Publisher: name: University of British Columbia
Year: 2010

description: Ronald Dworkin has achieved prominence in the field of jurisprudence through his book, Taking Rights Seriously, (hereafter TRS) his many articles in the "New York Review of Books," and other publications that pursue a coherent philosophy for liberals. In response to criticism of his earlier work, Dworkin has expanded and clarified his liberal position on equality rights. This thesis will address how Dworkin's later writings attempt to fill in gaps that occur in Dworkin's first arguments for a hierarchical, principled picture of the law. It will be argued here that Dworkin's views require an unusual perspective on the concept of an individual, and this renders his rights-based political morality seriously deficient. The nature of Dworkin's theory is first indicated by an attack on the "ruling theory of law" which he characterizes as positivistic when asked what the law is, and utilitarian when required to decide what the law should be. His central criticism charges that legal arguments are incomplete without principles which refer to or are implications of rights. Dworkin's liberal political morality is founded on rights to equal respect and concern. The elaboration of what these rights mean is sustained throughout Dworkin's publications. He maintains that his liberal rights-thesis is the theoretical articulation of the constitutional right to equality. Applying Dworkin's rights-theory to the Regents of the University of California v. Bakke2 case illuminates many of the more abstract aspects of his views. This thesis will argue against Dworkin by focusing on the too-narrow conception of individuals implied by his theory of rights. The ideal Dworkin employs of a right to 'equality of resources' justifies an aggressive redistributional scheme, unchecked by a fuller conception of what is an individual. Dworkin is only able to hold his ideal of a right to 'equality of resources' together with his notion of individual rights by accepting a diminished concept of the individual. This argument suggests that a fuller conception of an individual recognizes the connection between merit and entitlement. Dworkin's scepticism regarding the feasibility of merit being protected by individual rights is undercut by introducing a distinction between merit and success. Leaving key aspects of an individual, such as merit and its related features, out of official deliberation about rights, conceptually inhibits the extent of individualizability in a rights theory. If we wish to maintain such features, and value their protection and cultivation by a political order, adopting Dworkin's rights-thesis and its consequences is impossible.
Quantitative behavior of unipotent flows and an effective avoidance principle
Creators: name: Lindenstrauss, Elon
name: Mohammadi, Amir
name: Margulis, Gregory
name: Shah, Nimish
Publisher: name: arXiv
Year: 2019
Subjects: subject: Dynamical Systems (math.DS)
subject: Number Theory (math.NT)
subject: FOS: Mathematics

description: We give an effective bound on how much time orbits of a unipotent group $U$ on an arithmetic quotient $G/Γ$ can stay near homogeneous subvarieties of $G /Γ$ corresponding to $\mathbb Q$-subgroups of $G$. In particular, we show that if such a $U$-orbit is moderately near a proper homogeneous subvariety of $G/Γ$ for a long time it is very near a different homogeneous subvariety. Our work builds upon the linearization method of Dani and Margulis.
 Our motivation in developing these bounds is in order to prove quantitative density statements about unipotent orbits, which we plan to pursue in a subsequent paper. New qualitative implications of our effective bounds are also given.
description: 53 pages; Corollary 7.2 added
Additional file 1 of Usability evaluation of an integrated electronic medication management system implemented in an oncology setting using the unified theory of acceptance and use of technology
Creators: name: Dabliz, Racha
name: Poon, Simon K.
name: Ritchie, Angus
name: Burke, Rosemary
name: Penm, Jonathan
Publisher: name: figshare
Year: 2021
Subjects: subject: Information Systems
subject: FOS: Computer and information sciences

description: Additional file 1. Interview guide.
Geometric pumping and dephasing at topological phase transition
Creators: name: Song, B. Q.
name: Smith, J. D. H.
name: Luo, L.
name: Wang, J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: A measure-preserving formalism (MPF) is constructed and applied to spin/band models, which yield observations about pumping. It occurs at topological phase transition (TPT), i.e., a $Z_2$-flip, suggesting that $Z_2$ can imply bulk effects. The model's asymptotic behavior is analytically solved via MPF. The pumping probability is geometric, fractional, and has a ceiling of $\frac{1}{2}$. Intriguingly, theorems are proved about occurrence conditions, which are linked to the system's dimension and the distinction between rational and irrational numbers. Experimental detection is discussed.
description: 9 pages, 4 figures
La fatica dei concetti. Ipermodernità, postmoderno, realismo
Creators: name: Donnarumma, Raffaele
Publisher: name: Università degli Studi di Cagliari
Year: 2014

description: Ho pensato e scritto Ipermodernità in circa dieci anni; il che equivale a dire che mi ci è voluto un bel po’ per accerchiare e nominare il mio oggetto, prima senza neppure prevedere dove stessi andando, poi mentre le discussioni e i dibattiti, come si sarebbe detto una volta, fervevano (o forse, imperversavano). Se è un libro militante, lo è controvoglia e nel rifiuto di una pratica settaria della militanza; ma lo è soprattutto perché conserva, ben visibili, le tracce di quelle discussioni; e perché ha senso solo se il suo lavoro è l’inizio di un lavoro molto più grande, e che – almeno spero – non tocca unicamente a me compiere. Interventi come quelli che Between accoglie qui mi fanno pensare che la speranza non è a vuoto. Non posso che ringraziarne gli autori, la redazione della rivista, Niccolò Scaffai che ha curato la sezione.
description: Between, Vol 4, N° 8 (2014): Tecnologia, immaginazione e forme del narrare
Scaling of entanglement entropy at deconfined quantum criticality
Creators: name: Zhao, Jiarui
name: Wang, Yan-Cheng
name: Yan, Zheng
name: Cheng, Meng
name: Meng, Zi Yang
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We develop a nonequilibrium increment method to compute the Rényi entanglement entropy and investigate its scaling behavior at the deconfined critical (DQC) point via large-scale quantum Monte Carlo simulations. To benchmark the method, we first show that at an conformally-invariant critical point of O(3) transition, the entanglement entropy exhibits universal scaling behavior of area law with logarithmic corner corrections and the obtained correction exponent represents the current central charge of the critical theory. Then we move on to the deconfined quantum critical point, where although we still observe similar scaling behavior but with a very different exponent. Namely, the corner correction exponent is found to be negative. Such a negative exponent is in sharp contrast with positivity condition of the Rényi entanglement entropy, which holds for unitary conformal field theories(CFT). Our results unambiguously reveal fundamental differences between DQC and quantum critical points(QCPs) described by unitary CFTs.
description: published version
Floer homology in disc bundles and symplectically twisted geodesic flows
Creators: name: Usher, Michael
Publisher: name: arXiv
Year: 2008
Subjects: subject: Symplectic Geometry (math.SG)
subject: Differential Geometry (math.DG)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: We show that if K: P \to R is an autonomous Hamiltonian on a symplectic manifold (P,Ω) which attains 0 as a Morse-Bott nondegenerate minimum along a symplectic submanifold M, and if c_1(TP)|_M vanishes in real cohomology, then the Hamiltonian flow of K has contractible periodic orbits with bounded period on all sufficiently small energy levels. As a special case, if the geodesic flow on the cotangent bundle of M is twisted by a symplectic magnetic field form, then the resulting flow has contractible periodic orbits on all low energy levels. These results were proven by Ginzburg and Gürel when Ω|_M is spherically rational, and our proof builds on their work; the argument involves constructing and carefully analyzing at the chain level a version of filtered Floer homology in the symplectic normal disc bundle to M.
description: 37 pages, one figure
Magneto-gyrotropic photogalvanic effects due to inter-subband absorption in quantum wells
Creators: name: Diehl, H.
name: Shalygin, V. A.
name: Danilov, S. N.
name: Tarasenko, S. A.
name: Bel'kov, V. V.
name: Schuh, D.
name: Wegscheider, W.
name: Prettl, W.
name: Ganichev, S. D.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We report on the observation of the magneto-photogalvanic effect (MPGE) due to inter-subband transitions in (001)-oriented GaAs quantum wells. This effect is related to the gyrotropic properties of the structures. It is shown that inter-subband absorption of linearly polarized radiation may lead to spin-related as well as spin independent photocurrents if an external magnetic field is applied in the plane of the quantum well. The experimental results are analyzed in terms of the phenomenological theory and microscopic models of MPGE based on either asymmetric optical excitation or asymmetric relaxation of carriers in k-space. We observed resonant photocurrents not only at oblique incidence of radiation but also at normal incidence demonstrating that conventionally applied selection rules for the inter-subband optical transitions are not rigorous.
Additional file 1 of Usability evaluation of an integrated electronic medication management system implemented in an oncology setting using the unified theory of the acceptance and use of technology
Creators: name: Dabliz, Racha
name: Poon, Simon K.
name: Ritchie, Angus
name: Burke, Rosemary
name: Penm, Jonathan
Publisher: name: figshare
Year: 2021
Subjects: subject: Information Systems
subject: FOS: Computer and information sciences

description: Additional file 1. Interview guide.
title: Krisenbearbeitung durch digitale Plattformen
title: Rezension zu Moritz Altenried / Julia Dück / Mira Wallis (Hg.) (2021): Plattformkapitalismus und die Krise der sozialen Reproduktion. Münster: Westfälisches Dampfboot.
titleType: Subtitle
Creators: name: Orth, Barbara
Publisher: name: Freie Universität Berlin
Year: 2021
Subjects: subject: Plattformkapitalismus
subject: Plattformökonomie
subject: Rezension
subject: Gig Economy
subject: Soziale Reproduktion
subject: Plattform-Urbanismus
subject: Plattform-Forschung
subject: 900 Geschichte und Geografie::910 Geografie, Reisen::910 Geografie, Reisen
subject: 300 Sozialwissenschaften::300 Sozialwissenschaften, Soziologie::300 Sozialwissenschaften

description: Der im Verlag Westfälisches Dampfboot erschienene Sammelband Plattformkapitalismus und die Krise der sozialen Reproduktion, herausgegeben von Moritz Altenried, Julia Dück und Mira Wallis, bietet einen aktuellen Überblick zum Forschungsfeld Gig-Economy und soziale Reproduktion in den deutschsprachigen Sozialwissenschaften. Die Rezension greift einzelne Beiträge des Bandes heraus und ordnet diese in das noch neue Feld Plattform-Urbanismus ein.
Learning to Warm Up Cold Item Embeddings for Cold-start Recommendation with Meta Scaling and Shifting Networks
Creators: name: Zhu, Yongchun
name: Xie, Ruobing
name: Zhuang, Fuzhen
name: Ge, Kaikai
name: Sun, Ying
name: Zhang, Xu
name: Lin, Leyu
name: Cao, Juan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Information Retrieval (cs.IR)
subject: FOS: Computer and information sciences

description: Recently, embedding techniques have achieved impressive success in recommender systems. However, the embedding techniques are data demanding and suffer from the cold-start problem. Especially, for the cold-start item which only has limited interactions, it is hard to train a reasonable item ID embedding, called cold ID embedding, which is a major challenge for the embedding techniques. The cold item ID embedding has two main problems: (1) A gap is existing between the cold ID embedding and the deep model. (2) Cold ID embedding would be seriously affected by noisy interaction. However, most existing methods do not consider both two issues in the cold-start problem, simultaneously. To address these problems, we adopt two key ideas: (1) Speed up the model fitting for the cold item ID embedding (fast adaptation). (2) Alleviate the influence of noise. Along this line, we propose Meta Scaling and Shifting Networks to generate scaling and shifting functions for each item, respectively. The scaling function can directly transform cold item ID embeddings into warm feature space which can fit the model better, and the shifting function is able to produce stable embeddings from the noisy embeddings. With the two meta networks, we propose Meta Warm Up Framework (MWUF) which learns to warm up cold ID embeddings. Moreover, MWUF is a general framework that can be applied upon various existing deep recommendation models. The proposed model is evaluated on three popular benchmarks, including both recommendation and advertising datasets. The evaluation results demonstrate its superior performance and compatibility.
description: 10 pages, accepted by SIGIR2021
Accelerated iterative regularization via dual diagonal descent
Creators: name: Calatroni, Luca
name: Garrigos, Guillaume
name: Rosasco, Lorenzo
name: Villa, Silvia
Publisher: name: arXiv
Year: 2019
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics

description: We propose and analyze an accelerated iterative dual diagonal descent algorithm for the solution of linear inverse problems with general regularization and data-fit functions. In particular, we develop an inertial approach of which we analyze both convergence and stability. Using tools from inexact proximal calculus, we prove early stopping results with optimal convergence rates for additive data-fit terms as well as more general cases, such as the Kullback-Leibler divergence, for which different type of proximal point approximations hold.
Canalization and developmental stability of the yellow-necked mouse (Apodemus flavicollis) mandible and cranium related to age and nematode parasitism
Creators: name: Jojić, Vida
name: Čabrilo, Borislav
name: Bjelić-Čabrilo, Olivera
name: Jovanović, Vladimir M.
name: Budinski, Ivana
name: Vujošević, Mladen
name: Blagojević, Jelena
Publisher: name: Freie Universität Berlin
Year: 2021
Subjects: subject: Covariation
subject: Developmental homeostasis
subject: Developmental instability
subject: Fluctuating asymmetry
subject: 2D Geometric morphometrics
subject: Intestinal helminths
subject: Mammals
subject: Skull
subject: 500 Naturwissenschaften und Mathematik::590 Tiere (Zoologie)::590 Tiere (Zoologie)

description: Background Mammalian mandible and cranium are well-established model systems for studying canalization and developmental stability (DS) as two elements of developmental homeostasis. Nematode infections are usually acquired in early life and increase in intensity with age, while canalization and DS of rodent skulls could vary through late postnatal ontogeny. We aimed to estimate magnitudes and describe patterns of mandibular and cranial canalization and DS related to age and parasite intensity (diversity) in adult yellow-necked mice (Apodemus flavicollis). Results We found the absence of age-related changes in the levels of canalization for mandibular and cranial size and DS for mandibular size. However, individual measures of mandibular and cranial shape variance increased, while individual measures of mandibular shape fluctuating asymmetry (FA) decreased with age. We detected mandibular and cranial shape changes during postnatal ontogeny, but revealed no age-related dynamics of their covariance structure among and within individuals. Categories regarding parasitism differed in the level of canalization for cranial size and the level of DS for cranial shape. We observed differences in age-related dynamics of the level of canalization between non-parasitized and parasitized animals, as well as between yellow-necked mice parasitized by different number of nematode species. Likewise, individual measures of mandibular and cranial shape FA decreased with age for the mandible in the less parasitized category and increased for the cranium in the most parasitized category. Conclusions Our age-related results partly agree with previous findings. However, no rodent study so far has explored age-related changes in the magnitude of FA for mandibular size or mandibular and cranial FA covariance structure. This is the first study dealing with the nematode parasitism-related canalization and DS in rodents. We showed that nematode parasitism does not affect mandibular and cranial shape variation and covariance structure among and within individuals. However, parasite intensity (diversity) is related to ontogenetic dynamics of the levels of canalization and DS. Overall, additional studies on animals from natural populations are required before drawing some general conclusions.
Convergent Filaments Contracting Towards an Intermediate-mass Prestellar Core
Creators: name: Ren, Zhiyuan
name: Zhu, Lei
name: Shi, Hui
name: Yue, Nannan
name: Li, Di
name: Zhang, Qizhou
name: Mardones, Diego
name: Wu, Jingwen
name: Jiao, Sihan
name: Liu, Shu
name: Luo, Gan
name: Xie, Jinjin
name: Zhang, Chao
name: Xu, Xuefang
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Filamentary structures are closely associated with star-forming cores, but their detailed physical connections are still not clear. We studied the dense gas in the region of OMC-3 MMS-7 in Orion A molecular cloud using the molecular lines observed with the Atacama Large Millimeter/submillimeter Array (ALMA) and the Submillimeter Array (SMA). The ALMA N$_2$H$^+$ (1-0) emission has revealed three dense filaments intersected at the center, coincident with the central core MMS-7, which has a mass of $3.6\,M_\odot$. The filaments and cores are embedded in a parental clump with total mass of $29\,M_\odot$. The N$_2$H$^+$ velocity field exhibits a noticeable increasing trend along the filaments towards the central core MMS-7 with a scale of $v-v_{\rm lsr} \simeq 1.5$ ${\rm km\, s^{-1}}$ over a spatial range of $\sim$20 arcsec ($8\times 10^3$ AU), corresponding to a gradient of $40\,{\rm km\, s^{-1}}\,{\rm pc}^{-1}$. This feature is most likely to indicate an infall motion towards the center. The derived infall rate ($8\times 10^{-5}\,M_\odot$ year$^{-1}$) and timescale ($3.6\times 10^5$ years) are much lower than that in a spherical free-fall collapse and more consistent with the contraction of filament structures. The filaments also exhibit a possible fragmentation, but it does not seem to largely interrupt the gas structure or the infall motion towards the center. MMS-7 thus provides an example of filamentary infall into an individual prestellar core. The filament contraction could be less intense but more steady than the global spherical collapse, and may help generate an intermediate- or even high-mass star.
description: 12 pages, 5 figures, 1 table, accepted for publication in MNRAS
On Fourier restriction type problems on compact Lie groups
Creators: name: Zhang, Yunfeng
Publisher: name: arXiv
Year: 2020
Subjects: subject: Analysis of PDEs (math.AP)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics

description: In this article, we obtain new results for Fourier restriction type problems on compact Lie groups. We first provide a sharp form of $L^p$ estimates of irreducible characters in terms of their Laplace-Beltrami eigenvalue and as a consequence provide some sharp $L^p$ estimates of joint eigenfunctions for the ring of conjugate-invariant differential operators. Then we improve upon the previous range of exponent for scale-invariant Strichartz estimates for the Schrödinger equation, and provide new $L^p$ bounds of Laplace-Beltrami eigenfunctions in terms of their eigenvalue similar to known bounds on tori. A key ingredient in our proof of these results is a barycentric-semiclassical subdivision of the Weyl alcove in a maximal torus. On each component of this subdivision we carry out the analysis of characters and exponential sums, and the circle method of Hardy--Littlewood and Kloosterman.
description: Referee's comments incorporated, final version to appear in IUMJ
Additional file 1 of 2-Pentadecyl-2-oxazoline ameliorates memory impairment and depression-like behaviour in neuropathic mice: possible role of adrenergic alpha2- and H3 histamine autoreceptors
Creators: name: Boccella, Serena
name: Guida, Francesca
name: Iannotta, Monica
name: Iannotti, Fabio Arturo
name: Rosmara Infantino
name: Ricciardi, Flavia
name: Cristiano, Claudia
name: Vitale, Rosa Maria
name: Amodeo, Pietro
name: Marabese, Ida
name: Belardo, Carmela
name: Novellis, Vito De
name: Paino, Salvatore
name: Palazzo, Enza
name: Calignano, Antonio
name: Marzo, Vincenzo Di
name: Maione, Sabatino
name: Luongo, Livio
Publisher: name: figshare
Year: 2021
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Neuroscience
subject: 69999 Biological Sciences not elsewhere classified
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Additional file 1: Figure S1: Cell viability assay performed in histamine H3 and H4 receptors transfected COS cells treated with PEA-OXA. (A) Bar graph showing the cell viability assay measured in COS H3 (B) and H4 (C) cells using MTT assay. Each data represents the mean ± S.E.M. of four separate determinations.
Radial Velocity Variable sdO/Bs from SPY - Preliminary Orbits of Three New Short Period Binaries
Creators: name: Geier, S.
name: Heber, U.
name: Napiwotzki, R.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present new results from follow-up time-resolved spectroscopy of radial velocity variable hot subdwarfs from the SPY project. Medium resolution spectra were taken at the ESO NTT. Preliminary orbital solutions are presented for three single-lined sdO/B binaries. The orbital periods of all binaries are short and the companions are most likely white dwarfs or late main-sequence stars. Follow-up time-resolved spectroscopy is necessary to measure the orbital parameters with higher accuracy. Light curves should be taken in order to search for reflection effects and or eclipses.
description: 4 pages, 1 figure
A systematic study of silicate absorption features in heavily obscured AGNs observed by Spitzer/IRS
Creators: name: Tsuchikawa, T.
name: Kaneda, H.
name: Oyabu, S.
name: Kokusho, T.
name: Kobayashi, H.
name: Yamagishi, M.
name: Toba, Y.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Heavily obscured active galactic nuclei (AGNs) are known to show deep silicate absorption features in the mid-infrared (IR) wavelength range of 10--20~$μ$m. The detailed profiles of the features reflect the properties of silicate dust, which are likely to include information on AGN activities obscured by large amounts of dust. In order to reveal AGN activities obscured by large amounts of dust, we select 115 mid-IR spectra of heavily obscured AGNs observed by Spitzer/IRS, and systematically analyze the composition of silicate dust by spectral fitting using the 10~$μ$m amorphous and 23~$μ$m crystalline bands. We find that the main component of the silicate dust obscuring AGNs is amorphous olivine, the median mass column density of which is one order of magnitude higher than those of the minor components of amorphous pyroxene and crystalline forsterite. The median mass fraction of the amorphous pyroxene, $\sim$2\%, is significantly lower than that of the diffuse interstellar medium (ISM) dust in our Galaxy, while the median mass fraction of the crystalline forsterite, $\sim$6\%, is higher than that of the diffuse ISM dust. We also find that the mass fractions of the amorphous pyroxene and the crystalline forsterite positively correlate with each other. The low mass fraction of the amorphous pyroxene suggests that the obscuring silicate dust is newly formed, originating from starburst activities. The relatively high mass fraction of crystalline forsterite implies that the silicate dust is processed in the high temperature environment close to the nucleus and transported to outer cooler regions by molecular outflows. The positive correlation between the mass fractions can be naturally explained considering that amorphous pyroxene is transformed from crystalline forsterite by ion bombardments.
description: 22 pages, 6 figures, accepted for publication in A&A
Stochastic geometric analysis of asynchronous multi-carrier wireless networks
Creators: name: Ali, Ahsan
Publisher: name: Macquarie University
Year: 2024
Subjects: classificationCode: 399999
subject: Other education not elsewhere classified

description: This thesis mainly focuses on the modelling and performance analysis of future cellular and asynchronous multicarrier random wireless networks. In particular, the impact of asynchronous interference, and spatial distribution of users on the performance of a system is investigated. Using tools from stochastic geometry, we develop realistic yet tractable and accurate frameworks for the system-level analysis, while incorporating the interference coming from timing misaligned users.To meet the increasing demands of data traffic, deploying more base stations is one of the foremost vital solutions. Depending on the user population, base stations needs to be deployed in an aggressive manner which makes the overall spatial distribution of base stations random. In the first part of the thesis, we model locations of base stations in a cellular network with a β-Ginibre point process (β-GPP). Available results in the literature, for β-GPP, are complex, which makes them hard to give design insights. This shortcoming is addressed in this thesis, and an approximate expression for the coverage probability is derived. We use the horizontal-shift method, proposed in the literature, to compensate for the approximation errors.In the context of asynchronous multicarrier wireless networks, we first study the impact of inter-carrier interference (ICI) in an orthogonal frequency division multiplexing (OFDM) based wireless network. We develop an analytical framework for the performance analysis in a frequency selective wireless channel as a function of maximum timing offset. Moreover, the position of a used subcarrier, within the available spectrum is taken into consideration. To make the analysis more practical, we use the social interaction based connectivity model and its effect on the overall coverage is addressed.For spectrum sharing and mutual interference avoidance, carrier sense multiple access (CSMA) protocols are prevalent in random wireless networks. Recently, there has been an interest in using multi-channel operation of CSMA for short burst transmissions, as in the Internet of Things (IoT) networks. In this thesis, we derive a closed-form expression for estimating the intensity of users transmitting on different subchannels within the available bandwidth. Subsequently, an expression for approximating the coverage of a typical user for a particular subchannel is derived. For the same MC-CSMA based wireless network, we analyze the performance degradation due to asynchronous interference from the adjacent subchannels. To this end, we first provide a detailed link-level analysis for timing-misaligned cyclic-filter bank multicarrier (C-FBMC) waveform, and determine the coverage of a typical receiver in the network. Finally, a system-level comparison of OFDM and C-FBMC is provided.
One-pot gram-scale synthesis of virucidal heparin-mimicking polymers as HSV-1 inhibitors
Creators: name: Ahmadi, Vahid
name: Nie, Chuanxiong
name: Mohammadifar, Ehsan
name: Achazi, Katharina
name: Wedepohl, Stefanie
name: Kerkhoff, Yannic
name: Block, Stephan
name: Osterrieder, Klaus
name: Haag, Rainer
Publisher: name: Freie Universität Berlin
Year: 2021
Subjects: subject: herpes simplex virus type 1
subject: virustatic inhibition
subject: gram-scale synthesis
subject: 500 Naturwissenschaften und Mathematik::540 Chemie::540 Chemie und zugeordnete Wissenschaften

description: A straightforward and gram-scale synthesis method was developed to engineer highly sulfated hyperbranched polyglycerol bearing sulfated alkyl chains. The compounds with shorter alkyl chains showed multivalent virustatic inhibition against herpes simplex virus type 1 (HSV-1), similar to heparin. In contrast, the compound with the longest alkyl chains irreversibly inhibited the virus.
Additional file 2 of 2-Pentadecyl-2-oxazoline ameliorates memory impairment and depression-like behaviour in neuropathic mice: possible role of adrenergic alpha2- and H3 histamine autoreceptors
Creators: name: Boccella, Serena
name: Guida, Francesca
name: Iannotta, Monica
name: Iannotti, Fabio Arturo
name: Rosmara Infantino
name: Ricciardi, Flavia
name: Cristiano, Claudia
name: Vitale, Rosa Maria
name: Amodeo, Pietro
name: Marabese, Ida
name: Belardo, Carmela
name: Novellis, Vito De
name: Paino, Salvatore
name: Palazzo, Enza
name: Calignano, Antonio
name: Marzo, Vincenzo Di
name: Maione, Sabatino
name: Luongo, Livio
Publisher: name: figshare
Year: 2021
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Neuroscience
subject: 69999 Biological Sciences not elsewhere classified
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Additional file 2: Figure S2: Effect of PEA-OXA in COS cells stably expressing human histamine H4 and H1 receptors. (A) Scatter plots showing the effect of PEA-OXA in COS cells expressing histamine H4 receptors on intracellular cAMP levels. (B) Bar graph showing the quantification of [Ca2 +]i measurements performed in histamine H1 receptor transfected COS cells. (C, D) Representative images showing the Ca2+ oscillations in COS H1 cells following the preincubation with PEA-OXA 5 µM and stimulation with histamine 100 µM and/or thapsigargin 5 µM. (D) Data represent the mean ± SEM of ≥ 5 determinations. Data sets were compared by use of one-way ANOVA followed by Bonferroni’s test. The asterisk denotes a p value ≤ 0.05.