cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Novel bioactive compound from the bark of Putranjiva roxburghii Wall
Creators: name: Mishra, Sonali
name: Kumar, Saurabh
name: P. Darokar, Mahendra
name: Shanker, Karuna
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Microbiology
subject: FOS: Biological sciences
subject: Pharmacology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Immunology
subject: FOS: Clinical medicine

description: Putranjivah (Putranjiva roxburghii Wall, family – Putranjivaceae) is an Indian native medicinal plant used to treat many diseases such as treatment of mouth and stomach ulcers, hot swellings, smallpox, burning sensation and ophthalmopathy. The study of chemical constituents in the bark of P. roxburghii resulted in a new triterpene (6) along with five known triterpenoids (1–5). The chemical characterisation was based on 1H, 13C, 2D-NMR experimentation, and ESI-MS data. The anti-plasmodial activity was investigated by measuring parasite-specific lactate dehydrogenase (pLDH) based in vitro assay. The IC50 value results showed that friedlein (2.40 ± 0.70) and roxburghonol (4.10 ± 1.7 μg/ml) possess better anti-plasmodial activity than other isolated triterpenes (2–5) but not as potent as chloroquine (0.023 ± 0.002 μg/ml) against chloroquine-sensitive Plasmodium falciparum (3D7) strain.
Consistency of functional learning methods based on derivatives
Creators: name: Rossi, Fabrice
name: Villa-Vialaneix, Nathalie
Publisher: name: arXiv
Year: 2011
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics

description: In some real world applications, such as spectrometry, functional models achieve better predictive performances if they work on the derivatives of order m of their inputs rather than on the original functions. As a consequence, the use of derivatives is a common practice in Functional Data Analysis, despite a lack of theoretical guarantees on the asymptotically achievable performances of a derivative based model. In this paper, we show that a smoothing spline approach can be used to preprocess multivariate observations obtained by sampling functions on a discrete and finite sampling grid in a way that leads to a consistent scheme on the original infinite dimensional functional problem. This work extends (Mas and Pumo, 2009) to nonparametric approaches and incomplete knowledge. To be more precise, the paper tackles two difficulties in a nonparametric framework: the information loss due to the use of the derivatives instead of the original functions and the information loss due to the fact that the functions are observed through a discrete sampling and are thus also unperfectly known: the use of a smoothing spline based approach solves these two problems. Finally, the proposed approach is tested on two real world datasets and the approach is experimentaly proven to be a good solution in the case of noisy functional predictors.
First detection and energy measurement of recoil ions following beta decay in a Penning trap with the WITCH experiment
Creators: name: Beck, M.
name: Coeck, S.
name: Kozlov, V. Yu.
name: Breitenfeld, M.
name: Delahaye, P.
name: Friedag, P.
name: Herbane, M.
name: Herlert, A.
name: Kraev, I. S.
name: Mader, J.
name: Tandecki, M.
name: Van Gorp, S.
name: Wauters, F.
name: Weinheimer, Ch.
name: Wenander, F.
name: Severijns, N.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The WITCH experiment (Weak Interaction Trap for CHarged particles) will search for exotic interactions by investigating the beta-neutrino angular correlation via the measurement of the recoil energy spectrum after beta decay. As a first step the recoil ions from the beta-minus decay of 124In stored in a Penning trap have been detected. The evidence for the detection of recoil ions is shown and the properties of the ion cloud that forms the radioactive source for the experiment in the Penning trap are presented.
description: 9 pages, 6 figures (9 figure files), submitted to European Physical Journal A
Stochastic growth of quantum fluctuations during inflation
Creators: name: Finelli, F.
name: Marozzi, G.
name: Starobinsky, A. A.
name: Vacca, G. P.
name: Venturi, G.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The standard field-theoretical approach to the slow-roll inflation is introduced. We then show as, in order to calculate the mean square of the canonical gauge invariant quantum fluctuations associated to a generic field, the logarithm of the scale factor has to be used as the time variable in the Fokker-Planck equation in the stochastic approach. Then we compute the growth of different test fields with a small effective mass during slow-roll inflationary models, comparing the results with the one for the gauge invariant canonical fluctuation associated to the inflaton, the Mukhanov variable. We find that in most of the single fields inflationary models such fluctuation grows faster than any test field with a non-negative effective mass, with the exception of hybrid models.
description: 12 pages, 4 figures. Submitted to the proceedings of the 11th annual international meeting "Fundamental Frontiers of Physics", Paris, France, 6-9 July 2010
title: Boomerang Connectivity Table Revisited. Application to SKINNY and AES
Creators: name: Song, Ling
name: Qin, Xianrui
name: Hu, Lei
Publisher: name: Ruhr-Universität Bochum
Year: 2019

description: The boomerang attack is a variant of differential cryptanalysis which regards a block cipher E as the composition of two sub-ciphers, i.e., E = E1 o E0, and which constructs distinguishers for E with probability p2q2 by combining differential trails for E0 and E1 with probability p and q respectively. However, the validity of this attack relies on the dependency between the two differential trails. Murphy has shown cases where probabilities calculated by p2q2 turn out to be zero, while techniques such as boomerang switches proposed by Biryukov and Khovratovich give rise to probabilities greater than p2q2. To formalize such dependency to obtain a more accurate estimation of the probability of the distinguisher, Dunkelman et al. proposed the sandwich framework that regards E as Ẽ1 o Em o Ẽ0, where the dependency between the two differential trails is handled by a careful analysis of the probability of the middle part Em. Recently, Cid et al. proposed the Boomerang Connectivity Table (BCT) which unifies the previous switch techniques and incompatibility together and evaluates the probability of Em theoretically when Em is composed of a single S-box layer. In this paper, we revisit the BCT and propose a generalized framework which is able to identify the actual boundaries of Em which contains dependency of the two differential trails and systematically evaluate the probability of Em with any number of rounds. To demonstrate the power of this new framework, we apply it to two block ciphers SKINNY and AES. In the application to SKINNY, the probabilities of four boomerang distinguishers are re-evaluated. It turns out that Em involves5 or 6 rounds and the probabilities of the full distinguishers are much higher than previously evaluated. In the application to AES, the new framework is used to exclude incompatibility and find high probability distinguishers of AES-128 under the related-subkey setting. As a result, a 6-round distinguisher with probability 2−109.42 is constructed. Lastly, we discuss the relation between the dependency of two differential trails in boomerang distinguishers and the properties of components of the cipher.
description: IACR Transactions on Symmetric Cryptology, Volume 2019, Issue 1
Brownian motion meets Riemann curvature
Creators: name: Castro-Villarreal, Pavel
Publisher: name: arXiv
Year: 2010
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The general covariance of the diffusion equation is exploited in order to explore the curvature effects appearing on brownian motion over a d-dimensional curved manifold. We use the local frame defined by the so called Riemann normal coordinates to derive a general formula for the mean-square geodesic distance (MSD) at the short-time regime. This formula is written in terms of $O(d)$ invariants that depend on the Riemann curvature tensor. We study the n-dimensional sphere case to validate these results. We also show that the diffusion for positive constant curvature is slower than the diffusion in a plane space, while the diffusion for negative constant curvature turns out to be faster. Finally the two-dimensional case is emphasized, as it is relevant for the single particle diffusion on biomembranes.
description: 16 pages and 3 figures
title: libInterMAC: Beyond Confidentiality and Integrity in Practice
Creators: name: Albrecht, Martin R.
name: Brandt Hansen, Torben
name: Paterson, Kenneth G.
Publisher: name: Ruhr-Universität Bochum
Year: 2019

description: Boldyreva et al. (Eurocrypt 2012) defined a fine-grained security model capturing ciphertext fragmentation attacks against symmetric encryption schemes. The model was extended by Albrecht et al. (CCS 2016) to include an integrity notion. The extended security model encompasses important security goals of SSH that go beyond confidentiality and integrity to include length hiding and denial-of-service resistance properties. Boldyreva et al. also defined and analysed the InterMAC scheme, while Albrecht et al. showed that InterMAC satisfies stronger security notions than all currently available SSH encryption schemes. In this work, we take the InterMAC scheme and make it fully ready for use in practice. This involves several steps. First, we modify the InterMAC scheme to support encryption of arbitrary length plaintexts and we replace the use of Encrypt-then-MAC in InterMAC with modern noncebased authenticated encryption. Second, we describe a reference implementation of the modified InterMAC scheme in the form of the library libInterMAC. We give a performance analysis of libInterMAC. Third, to test the practical performance of libInterMAC, we implement several InterMAC-based encryption schemes in OpenSSH and carry out a performance analysis for the use-case of file transfer using SCP. We measure the data throughput and the data overhead of using InterMAC-based schemes compared to existing schemes in OpenSSH. Our analysis shows that, for some network set-ups, using InterMAC-based schemes in OpenSSH only moderately affects performance whilst providing stronger security guarantees compared to existing schemes.
description: IACR Transactions on Symmetric Cryptology, Volume 2019, Issue 1
Significance of Classification Techniques in Prediction of Learning Disabilities
Creators: name: Balakrishnan, Julie M. David And Kannan
Publisher: name: arXiv
Year: 2010
Subjects: subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: The aim of this study is to show the importance of two classification techniques, viz. decision tree and clustering, in prediction of learning disabilities (LD) of school-age children. LDs affect about 10 percent of all children enrolled in schools. The problems of children with specific learning disabilities have been a cause of concern to parents and teachers for some time. Decision trees and clustering are powerful and popular tools used for classification and prediction in Data mining. Different rules extracted from the decision tree are used for prediction of learning disabilities. Clustering is the assignment of a set of observations into subsets, called clusters, which are useful in finding the different signs and symptoms (attributes) present in the LD affected child. In this paper, J48 algorithm is used for constructing the decision tree and K-means algorithm is used for creating the clusters. By applying these classification techniques, LD in any child can be identified.
description: 10 pages, 3 tables and 2 figures
title: CRAFT: Lightweight Tweakable Block Cipher with Efficient Protection Against DFA Attacks
Creators: name: Beierle, Christof
name: Leander, Gregor
name: Moradi, Amir
name: Rasoolzadeh, Shahram
Publisher: name: Ruhr-Universität Bochum
Year: 2019

description: Traditionally, countermeasures against physical attacks are integrated into the implementation of cryptographic primitives after the algorithms have been designed for achieving a certain level of cryptanalytic security. This picture has been changed by the introduction of PICARO, ZORRO, and FIDES, where efficient protection against Side-Channel Analysis (SCA) attacks has been considered in their design. In this work we present the tweakable block cipher CRAFT: the efficient protection of its implementations against Differential Fault Analysis (DFA) attacks has been one of the main design criteria, while we provide strong bounds for its security in the related-tweak model. Considering the area footprint of round-based hardware implementations, CRAFT outperforms the other lightweight ciphers with the same state and key size. This holds not only for unprotected implementations but also when fault-detection facilities, side-channel protection, and their combination are integrated into the implementation. In addition to supporting a 64-bit tweak, CRAFT has the additional property that the circuit realizing the encryption can support the decryption functionality as well with very little area overhead.
description: IACR Transactions on Symmetric Cryptology, Volume 2019, Issue 1
title: Constructing Low-latency Involutory MDS Matrices with Lightweight Circuits
Creators: name: Li, Shun
name: Sun, Siwei
name: Li, Chaoyun
name: Wei, Zihao
name: Hu, Lei
Publisher: name: Ruhr-Universität Bochum
Year: 2019

description: MDS matrices are important building blocks providing diffusion functionality for the design of many symmetric-key primitives. In recent years, continuous efforts are made on the construction of MDS matrices with small area footprints in the context of lightweight cryptography. Just recently, Duval and Leurent (ToSC 2018/FSE 2019) reported some 32 × 32 binary MDS matrices with branch number 5, which can be implemented with only 67 XOR gates, whereas the previously known lightest ones of the same size cost 72 XOR gates.
In this article, we focus on the construction of lightweight involutory MDS matrices, which are even more desirable than ordinary MDS matrices, since the same circuit can be reused when the inverse is required. In particular, we identify some involutory MDS matrices which can be realized with only 78 XOR gates with depth 4, whereas the previously known lightest involutory MDS matrices cost 84 XOR gates with the same depth. Notably, the involutory MDS matrix we find is much smaller than the AES MixColumns operation, which requires 97 XOR gates with depth 8 when implemented as a block of combinatorial logic that can be computed in one clock cycle. However, with respect to latency, the AES MixColumns operation is superior to our 78-XOR involutory matrices, since the AES MixColumns can be implemented with depth 3 by using more XOR gates.
We prove that the depth of a 32 × 32 MDS matrix with branch number 5 (e.g., the AES MixColumns operation) is at least 3. Then, we enhance Boyar’s SLP-heuristic algorithm with circuit depth awareness, such that the depth of its output circuit is limited. Along the way, we give a formula for computing the minimum achievable depth of a circuit implementing the summation of a set of signals with given depths, which is of independent interest. We apply the new SLP heuristic to a large set of lightweight involutory MDS matrices, and we identify a depth 3 involutory MDS matrix whose implementation costs 88 XOR gates, which is superior to the AES MixColumns operation with respect to both lightweightness and latency, and enjoys the extra involution property.
description: IACR Transactions on Symmetric Cryptology, Volume 2019, Issue 1
Ergodic directional switching in mobile insect groups
Creators: name: Escudero, Carlos
name: Yates, Christian A.
name: Buhl, Jerome
name: Couzin, Iain D.
name: Erban, Radek
name: Kevrekidis, Ioannis G.
name: Maini, Philip K.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Quantitative Methods (q-bio.QM)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: We obtain a Fokker-Planck equation describing experimental data on the collective motion of locusts. The noise is of internal origin and due to the discrete character and finite number of constituents of the swarm. The stationary probability distribution shows a rich phenomenology including non-monotonic behavior of several order/disorder transition indicators in noise intensity. This complex behavior arises naturally as a result of the randomness in the system. Its counterintuitive character challenges standard interpretations of noise induced transitions and calls for an extension of this theory in order to capture the behavior of certain classes of biologically motivated models. Our results suggest that the collective switches of the group's direction of motion might be due to a random ergodic effect and, as such, they are inherent to group formation.
description: Physical Review Focus 26, July 2010
Identification of a region in the Pr55gag-polyprotein essential for HIV-1 particle formation
Creators: name: von Poblotzki, A.
name: Wagner, Ralf
name: Niedrig, M.
name: Wanner, G.
name: Wolf, Hans J.
name: Modrow, Susanne
Publisher: name: Universität Regensburg
Year: 1993
Subjects: subject: 610 Medizin
subject: Amino Acid Sequence
subject: Base Sequence
subject: Cell Line
subject: Codon/genetics
subject: Gene Products, gag/metabolism
subject: HIV-1/physiology
subject: HIV-2/physiology
subject: Humans
subject: Molecular Sequence Data
subject: Polymerase Chain Reaction/methods
subject: Protein Precursors/metabolism
subject: Restriction Mapping
subject: Sequence Homology, Amino Acid
subject: Vaccinia virus/genetics

description: The pr55gag polyprotein of HIV-1 plays a critical role in the formation of immature virus particles in the cell and during the budding process. We investigated the influence of amino acid substitutions in the p24CA- region of the gag polyprotein on the viral assembly process. Deletion of the amino acids 341-352 in the carboxy terminal part of the p24CA resulted in a loss of the capacity of the gag polyprotein to form virus-like particles when expressed in eucaryotic cells by recombinant vaccinia virus. In further experiments it turned out that the amino acids 341-346 and 350-352 are important for the ability of the pr55gag to form virus-like particles. Because these stretches are conserved among HIV-1, HIV-2, SIV, and FIV, we conclude that these amino acids form a domain highly important for the assembly of these lentiviruses.
Physiological and environmental factors influencing migration survival and behaviour of hatchery Seymour River steelhead smolts (Oncorhynchus mykiss) in coastal British Columbia
Creators: name: Healy, Stephen James
Publisher: name: University of British Columbia
Year: 2017

description: For anadromous steelhead smolts (Oncorhynchus mykiss), physiological condition and spatiotemporal variability in movement patterns, such as routes, have the potential to influence survival, but these aspects of the migration are poorly understood. To investigate route-specific movements and survival during outmigration, I implanted acoustic tags into 243 hatchery steelhead smolts and tracked their migration through coastal British Columbia for up to ~400 km. Two release groups (marine and freshwater) were used to assess survival through the first marine inlet. To better understand how smolt condition influences migration fate, I combined acoustic telemetry with non-lethal gill biopsies and used high-throughput quantitative polymerase chain reaction to assess how infectious agents and host gene expression profiles influence smolt migration fate. Poorest survival was in the river and marine inlet first encountered by smolts. Survival rates in all other migratory segments did not differ between release groups, suggesting the near-shore marine environment is associated with particularly poor survival for outmigrant steelhead. I present rare evidence of route-specific survival for a migratory species, which was detected though a series of channels ~200 km from release. The westernmost route here was associated with significantly higher survival and was more travelled. A portion of smolts exhibited ‘milling patterns’ including reversals in migration direction or lateral movements along acoustic subarrays. Redundancy analyses of gene expression, infectious agent loads, and body condition highlighted gene expression profiles indicative of migratory fate. Smolts that were never detected in the river clustered together, far from other groups in ordination space. Smolts that did not make it from the river to the estuary had significantly elevated expression of the immune genes Il-17D and RPL6, and lower expression of the osmoregulatory gene NKA α1b relative to other individuals. Two infectious agents were detected in tagged smolts (Flavobacterium psychrophilum and 'Candidatus Branchiomonas cysticola'), neither of which had an influence on survival. My results identify potentially important, yet understudied regions affecting survival of salmonids smolts. I also demonstrate some of the first evidence of gene expression profiles predicting individual migration fate in juvenile salmonids, and highlight potential mechanisms influencing freshwater and early marine survival for steelhead smolts.
Lyman alpha emission from the first galaxies: Signatures of accretion and infall in the presence of line trapping
Creators: name: Latif, M. A.
name: Schleicher, Dominik. R. G.
name: Spaans, M.
name: Zaroubi, S.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The formation of the first galaxies is accompanied by large accretion flows and virialization shocks, during which the gas is shock-heated to temperatures of $\sim10^4$ K, leading to potentially strong fluxes in the Lyman alpha line. Indeed, a number of Lyman alpha blobs has been detected at high redshift. In this letter, we explore the origin of such Lyman alpha emission using cosmological hydrodynamical simulations that include a detailed model of atomic hydrogen as a multi-level atom and the effects of line trapping with the adaptive mesh refinement code FLASH. We see that baryons fall into the center of a halo through cold streams of gas, giving rise to a Lyman alpha luminosity of at least $\rm 10^{44} erg s^{-1}$ at $\rm z=4.7$, similar to observed Lyman alpha blobs. We find that a Lyman alpha flux of $\rm 5.0\times 10^{-17} erg cm^{-2} s^{-1}$ emerges from the envelope of the halo rather than its center, where the photons are efficiently trapped. Such emission can be probed in detail with the upcoming James Webb Space Telescope (JWST) and will constitute an important probe of gas infall and accretion.
description: 5 pages, 3 figures, Accepted for publication in MNRAS LETTERS
Effect of Anadenanthera colubrina protease inhibitors as an antiinflamatory mediator
Creators: name: Guarneire, Gracimério J
name: Junior, Oswaldo Cardoso
name: Lima, Nerilson Marques
name: Santos, Emanuel Aguilar
name: Schulze, Caio Aguiar
name: Silva, Wellington Pereira
name: Batista, João Pedro Oliveira
name: de Paula Carli, Gabriela
name: Castro, Sandra Br
name: Alves, Caio Cesar S
name: Carli, Alessandra P
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Biophysics
subject: Biochemistry
subject: Microbiology
subject: FOS: Biological sciences
subject: Cell Biology
subject: Physiology
subject: Pharmacology
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Immunology
subject: FOS: Clinical medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: Cancer
subject: Hematology

description: This work aimed to obtain and characterize protease inhibitors from A. colubrina leaves and evaluate their potential as inflammatory mediator and cell viability. The protein extract was analyzed and characterized by SDS-PAGE, RP-HPLC-PDA, MALDI-TOF/MS and Zeta potential. Bioassays were conducted in order to evaluate the cell viability in RAW 264.7, in vitro (NO and TNF-α production inhibition) and in vivo anti-inflammatory potential, inhibition rate of trypsin and hemagglutination activity from protein extract. The results revealed the presence of bands at 14, 21 and 30 kDa in SDS-PAGE, the RP-HPLC-PDA analysis showed peaks at 12, 13, 28 and 40 minutes and MALDI-TOF/MS showed peaks with 3.4, 4.7, 5.6, 9.4 and 11.2 kDa. The protein extracts presented enzymatic activity inhibition of trypsin (IC50 59.2 μgmL−1), did not show any cytotoxicity to RAW264.7 cells, hemagglutination 8HU and insignificant reduction in NO and TNF-α production and reduced anti-inflammatory potential in vivo compared to dexamethasone.
Exact solution for quantum dynamics of a periodically-driven two-level-system
Creators: name: Gangopadhyay, Anirban
name: Dzero, Maxim
name: Galitski, Victor
Publisher: name: arXiv
Year: 2010
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present a family of exact analytic solutions for non-linear quantum dynamics of a two-level system (TLS) subject to a periodic-in-time external field. In constructing the exactly solvable models, we use a "reverse engineering" approach where the form of external perturbation is chosen to preserve an integrability constraint, which yields a single non-linear differential equation for the ac-field. A solution to this equation is expressed in terms of Jacobi elliptic functions with three independent parameters that allows one to choose the frequency, average value, and amplitude of the time-dependent field at will. This form of the ac-drive is especially relevant to the problem of dynamics of TLS charge defects that cause dielectric losses in superconducting qubits. We apply our exact results to analyze non-linear dielectric response of such TLSs and show that the position of the resonance peak in the spectrum of the relevant correlation function is determined by the quantum-mechanical phase accumulated by the TLS wave-function over a time evolution cycle. It is shown that in the non-linear regime, this resonance frequency may be shifted strongly from the value predicted by the canonical TLS model. We also analyze the "spin" survival probability in the regime of strong external drive and recover a coherent destruction of tunneling phenomenon within our family of exact solutions, which manifests itself as a strong suppression of "spin-flip" processes and suggests that such non-linear dynamics in LC-resonators may lead to lower losses.
description: 13 pages, 7 EPS figures
A coupled non-orthogonal hypoelastic constitutive model for simulation of woven fabrics
Creators: name: Haghi Kashani, Masoud
Publisher: name: University of British Columbia
Year: 2017

description: Woven fabrics offer a number of advantages compared to their unidirectional counterpart, such as their superior formability and higher out-of-plane stiffness, making this class of materials a decent alternative in leading composite industries such as aerospace and automotive. While their performance merits originate from the interlacing architecture of yarns, this architecture causes some complications toward their reliable analyses; namely the presence of inherent couplings between families of yarns under different deformation modes. Theoretically, the inherent coupling means an arbitrary macro deformation in a given fabric direction can affect the individual effective properties in other directions. This study aims to provide an enhanced understanding of the role of such couplings in the mechanical behavior of woven fabrics. More specifically, the study attempts to identify the underlying multi-scale sources responsible for the coupled mechanical response of woven fabrics. Subsequently, the work introduces a new non-orthogonal hypoelastic constitutive model to reflect the observed coupled deformation mechanisms in woven fabrics. Different modes of coupling are defined and distinguished from the general coupling scheme presented by the Hook’s law. In order to parameterize the model, a comprehensive characterization framework under tension-shear, tension-tension, and shear-tension coupling modes is developed, via a multi-scale analysis. The results show that the first two modes should be closely taken into account in the analyses of fabrics to achieve more accurate predictions of the material response. The attained macro-level characterization results are interpreted at micro and meso levels. Finally, the coupled non-orthogonal model is augmented with a new wrinkling criterion to precisely predict not only the stress-strain response, but also the wrinkling onset of a plain weave in the presence of inherent coupling. The comparison between the experimental and prediction results validates the capabilities of the proposed model. The main practical advantages of including couplings in the analyses of woven fabrics are considered to be (a) more reliable design of the fabric-reinforced composites, (b) better anticipating the shape of deformed fabrics in general, and the wrinkles in particular, and (c) determination of the required tension levels to prevent wrinkling during forming process of fabrics.
Geometry Matching for Multi-Embodiment Grasping
Creators: name: Attarian, Maria
name: Asif, Muhammad Adil
name: Liu, Jingzhou
name: Hari, Ruthrash
name: Garg, Animesh
name: Gilitschenski, Igor
name: Tompson, Jonathan
Publisher: name: arXiv
Year: 2023
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: Many existing learning-based grasping approaches concentrate on a single embodiment, provide limited generalization to higher DoF end-effectors and cannot capture a diverse set of grasp modes. We tackle the problem of grasping using multiple embodiments by learning rich geometric representations for both objects and end-effectors using Graph Neural Networks. Our novel method - GeoMatch - applies supervised learning on grasping data from multiple embodiments, learning end-to-end contact point likelihood maps as well as conditional autoregressive predictions of grasps keypoint-by-keypoint. We compare our method against baselines that support multiple embodiments. Our approach performs better across three end-effectors, while also producing diverse grasps. Examples, including real robot demos, can be found at geo-match.github.io.
Senso della fine e senso del finale nei romanzi di Michel Houellebecq
Creators: name: Sturli, Valentina
Publisher: name: SigMa - Rivista di Letterature comparate, Teatro e Arti dello spettacolo
Year: 2018

description: L’articolo a confronto tra loro i finali dei principali romanzi di Houellebecq per provare a indagare se e come essi svolgano una funzione centrale nell’economia dell’intera opera di questo autore, rivelando consonanze inaspettate e fornendo per essa chiavi di lettura che implicano strettamente la riflessione sul senso della fine. Se con Kermode intendiamo per senso della fine la percezione di vivere nel kairos, il periodo di crisi costituito dagli ultimi tempi che precedono l’avvento di una svolta epocale nelle sorti e nei destini degli uomini, allora poche opere contemporanee sembrano esplorare a livello tematico questo tipo di situazione con maggiore insistenza di quella di Michel Houellebecq. Ripercorrendo i suoi romanzi , in continuazione si riscontrano rappresentazioni, profondamente intrecciate e interconnesse, del senso della fine: da un lato quello che riflette sul tramonto, negli ultimi anni del ’900, di una serie di assetti sociali, produttivi e di costume tipici della modernità occidentale, dall’altro quello che potremmo definire di tipo “futuribile-apocalittico”, che verte sull’estinzione vera e propria del genere umano sulla terra, e dei suoi vari tentativi di trascendimento attraverso la creazione di una nuova razza di esseri “superiori”. Tutti temi in forte risonanza con una serie di teorizzazioni che, dall’inizio degli anni ’80 a oggi, hanno definitivamente consacrato l’ascesa di quel paradigma teorico-sociologico che definiamo ipermodernità.
description: SigMa - Rivista di Letterature comparate, Teatro e Arti dello spettacolo, N. 1 (2017)
A quinoline alkaloid rich Quisqualis indica floral extract enhances the bioactivity
Creators: name: Rout, Prasant Kumar
name: Kumar, Prashant
name: Rao, Y. Ramachandra
name: Kumar, Anant
name: Bawankule, Dnyaneshwar U.
name: Singh, Ruchi
name: Singh, Kijay Bahadur
name: Chanotiya, Chandan Singh
name: Naik, S. N.
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Biochemistry
subject: Genetics
subject: FOS: Biological sciences
subject: Pharmacology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: 69999 Biological Sciences not elsewhere classified

description: A volatile alkaloid quinoline-4-carbonitrile (QCN) was isolated from the floral extract of Quisqualis indica. Major compounds were trans-linalool oxide (1.0, 4.5%), methyl benzoate (1.0, 4.0%), 2,2,6-trimethyl-6-vinyl-tetrahydropyran-3-one (7.4, 17.8%), 2,2,6-trimethyl-6-vinyl-tetrahydropyran-3-ol (1.0, 1.2%), (E,E)-α-farnesene (29.1, 16.1%), QCN (5.7, 1.3%) in live and picked flowers, respectively. Flower compositions were altered due to change in enzymatic reaction at the time of picking. Some rearrangements of oxygenated terpenoids occurred in the process of hydrodistillation to obtain essential oil. Chemical synthesis of QCN and its selectively reduced products derived from QCN were prepared through green reaction process. The catalytic modification of QCN has produced quinoline-4-methylamine; the later compound has shown enhanced bio-activities. QCN and floral extract (absolute) have shown potential anti-inflammatory and antioxidant activities. Besides, floral absolute has shown significant anti-inflammatory and antioxidant activities due to improved QCN (19.7%) content to synergize amongst terpenoids and benzenoids as compared to the essential oil with 1.1% of QCN.
“La historia de cómo ha ido muriendo un hombre”. Tanatografie e autofinzioni nella Spagna del ’900
Creators: name: Schiano, Gennaro
Publisher: name: SigMa - Rivista di Letterature comparate, Teatro e Arti dello spettacolo
Year: 2018

description: Il paradossale fondamento del racconto di vita, tessuto tra due poli ineffabili come la nascita e la morte del narratore-protagonista, impone una modulazione costante di operazioni metonimiche atte a rappresentare in modo attendibile (veritiero, verosimile o referenziale che sia) le esperienze del vissuto tra le pagine del narrato. È nelle caratteristiche e nelle differenti soluzioni di questa modulazione che l’autobiografia discute costantemente la rappresentazione di armonie e distonie tra inizio e fine, fornendo un campo di ricerca privilegiato per sondare l’evoluzione di teleologie codificate, di morti annunciate e di presagiti desideri di estinzione totale. Campo di ricerca che assume caratteri inediti nel Novecento quando reagenti di differente natura modificano in modo sensibile lo statuto del genere, confermando lo stretto rapporto con i codici di rappresentazione della realtà e con gli immaginari del romanzo che negli stessi anni mettono in discussione proprio la possibilità di narrare le vite delle “persone come noi”. L’articolo riflette sulla strutturale tensione narrativa del racconto di vita verso la non narrabile morte e di mettere in luce l’evoluzione di questa tensione nel Novecento, quando sembra disperdere irreversibilmente le teleologie del canone autobiografico ottocentesco, offrendo soluzioni letterarie eterogenee che mostrano meccanismi di serialità inediti. I testi autobiografici di Rafael Alberti, Ramón Gómez de la Serna e Javier Marías presi in considerazione offrono una campionatura rilevante di meccanismi narrativi e nuclei tematici che rimandano a un senso della fine annunciato e sistematicamente fugato.
description: SigMa - Rivista di Letterature comparate, Teatro e Arti dello spettacolo, N. 1 (2017)
La catena multicolore dell’avventura infinita: romanzo e serie TV
Creators: name: Piga Bruni, Emanuela
Publisher: name: SigMa - Rivista di Letterature comparate, Teatro e Arti dello spettacolo
Year: 2018

description: Senza mirare a definire integralmente il rapporto tra le diverse sfere del letterario e del televisivo, lo scopo di questo scritto è di riflettere sulle trasformazioni del romanzo attraverso epoche e media. L’indagine si svolge sul filo del confronto tra due romanzi ottocenteschi considerati tipici del genere popolare (Les Mystères de Paris di Eugène Sue) e realista (Great Expectations, 1860 -1861, di Charles Dickens) e due serie TV contemporanee dal successo globale (Lost, di J.J. Abrams, D. Lindelof, J. Lieber, C. Cuse; Mad Men, AMT, 2007-2015) di Matthew Weiner. Attraverso una critica sintomatica dei finali di puntata, e dei finali conclusivi, interpretati come indizi di altre caratteristiche stilistiche, il focus verte sui temi di lunga durata e sulle forme testuali che caratterizzano il romanzo classico e la moderna serialità televisiva. Nonostante il carattere di ‘testo espanso’ e di ‘infinito intrattenimento’ della lunga serialità televisiva, l’attenzione attribuita al finale da parte dei showrunners, della critica e del pubblico testimonia la centralità di questo elemento narrativo nella composizione e ricezione dell’opera audiovisiva.
description: SigMa - Rivista di Letterature comparate, Teatro e Arti dello spettacolo, N. 1 (2017)
Inter-arrival times of message propagation on directed networks
Creators: name: Mihaljev, Tamara
name: de Arcangelis, Lucilla
name: Herrmann, Hans J.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Networking and Internet Architecture (cs.NI)
subject: Social and Information Networks (cs.SI)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: One of the challenges in fighting cybercrime is to understand the dynamics of message propagation on botnets, networks of infected computers used to send viruses, unsolicited commercial emails (SPAM) or denial of service attacks. We map this problem to the propagation of multiple random walkers on directed networks and we evaluate the inter-arrival time distribution between successive walkers arriving at a target. We show that the temporal organization of this process, which models information propagation on unstructured peer to peer networks, has the same features as SPAM arriving to a single user. We study the behavior of the message inter-arrival time distribution on three different network topologies using two different rules for sending messages. In all networks the propagation is not a pure Poisson process. It shows universal features on Poissonian networks and a more complex behavior on scale free networks. Results open the possibility to indirectly learn about the process of sending messages on networks with unknown topologies, by studying inter-arrival times at any node of the network.
description: 9 pages, 12 figures
Raccontare e governare il tempo: Agnès Varda, Terence Davies, Alina Marazzi
Creators: name: Masecchia, Anna
Publisher: name: SigMa - Rivista di Letterature comparate, Teatro e Arti dello spettacolo
Year: 2018

description: Ritagliare, recuperare, assemblare immagini (in pellicola oppure digitali; fotografie) è un’operazione sempre più frequente e che dà vita, nell’audiovisivo contemporaneo, a testi dalla natura ibrida. Testi sospesi tra la dimensione del documentario e quella della finzione, che si muovono a cavallo tra più generi e i cui finali, per forza di cose, possono tanto confermare quanto disattendere i codici previsti dal genere a cui prioritariamente appartengono. Un’operazione di questo tipo che senso ha? Che senso dà al passato? E al presente? Il montaggio è lavoro sul tempo. Nel caso di immagini preesistenti, riutilizzate per comporre un testo altro, il montaggio e la messa in sequenza narrativa sono entrambe operazioni che appaiono guidate dal desiderio di mettere in ordine frammenti di vita; e a volte di mettere ordine, attraverso il passato, nel proprio presente. Seguendo questa traiettoria, il lavoro di registi di generazioni diverse come Agnès Varda (1928), Terence Davies (1945) e Alina Marazzi (1964) apre spesso la dimensione audiovisiva a un discorso sul tempo che si fa interrogazione del proprio vissuto, ricerca di un’origine che illumini il senso di una fine.
description: SigMa - Rivista di Letterature comparate, Teatro e Arti dello spettacolo, N. 1 (2017)
An FPTAS for Bargaining Networks with Unequal Bargaining Powers
Creators: name: Kanoria, Yashodhan
Publisher: name: arXiv
Year: 2010
Subjects: subject: Computer Science and Game Theory (cs.GT)
subject: Multiagent Systems (cs.MA)
subject: FOS: Computer and information sciences

description: Bargaining networks model social or economic situations in which agents seek to form the most lucrative partnership with another agent from among several alternatives. There has been a flurry of recent research studying Nash bargaining solutions (also called 'balanced outcomes') in bargaining networks, so that we now know when such solutions exist, and also that they can be computed efficiently, even by market agents behaving in a natural manner. In this work we study a generalization of Nash bargaining, that models the possibility of unequal 'bargaining powers'. This generalization was introduced in [KB+10], where it was shown that the corresponding 'unequal division' (UD) solutions exist if and only if Nash bargaining solutions exist, and also that a certain local dynamics converges to UD solutions when they exist. However, the bound on convergence time obtained for that dynamics was exponential in network size for the unequal division case. This bound is tight, in the sense that there exists instances on which the dynamics of [KB+10] converges only after exponential time. Other approaches, such as the one of Kleinberg and Tardos, do not generalize to the unsymmetrical case. Thus, the question of computational tractability of UD solutions has remained open. In this paper, we provide an FPTAS for the computation of UD solutions, when such solutions exist. On a graph G=(V,E) with weights (i.e. pairwise profit opportunities) uniformly bounded above by 1, our FPTAS finds an \eps-UD solution in time poly(|V|,1/\eps). We also provide a fast local algorithm for finding \eps-UD solution, providing further justification that a market can find such a solution.
description: 18 pages; Amin Saberi (Ed.): Internet and Network Economics - 6th International Workshop, WINE 2010, Stanford, CA, USA, December 13-17, 2010. Proceedings.
Giorgio Manganelli tra “opera aperta” e “opera chiusa”
Creators: name: Marelli, Arianna
Publisher: name: SigMa - Rivista di Letterature comparate, Teatro e Arti dello spettacolo
Year: 2018

description: Nel marzo del 1969, all’indomani di un’entusiastica lettura in manoscritto di Nuovo commento, Italo Calvino indirizza a Giorgio Manganelli una lettera che rappresenta non solo la prima, ma anche – per molti aspetti – una già caratterizzante interpretazione dell’opera. Calvino scopre subito le sue carte: assecondando, dice di se stesso, “quel fanatico dell’‘opera chiusa’ e degli schemi lineari che alberga in me”, dichiara di essere andato alla ricerca nel testo di uno o più “sistemi” ordinativi interni. Pur avendo trovato varie “struttur[e] […] pertinent[i]”, e quindi per lui di particolare soddisfazione, Calvino conclude “col consiglio di […] completare l’incastratura di tutto nel tutto per rendere il tutto compatto come un uovo”. Un modo, in omaggiante stile manganelliano, per ribadire la propria ferrea istanza di chiusura. Nuovo commento però – come del resto quasi tutti i testi manganelliani – è tutt’altro che un’“opera chiusa”. Si propone, anzi, per programma come un’“opera aperta”: dove – seguendo la fortunata formula di Umberto Eco (enunciata solo pochi anni prima e implicita, per contrasto, nello stesso discorso di Calvino) – l’apertura non è tanto (o soltanto) nell’atto di fruizione, ma presupposta nello stesso atto narrativo, in una scrittura cioè da un lato (potenzialmente) infinita, dall’altro “scostata e dall’inizio e dalla fine”, sviluppata in uno “spazio mediano” (con tutta la problematicità che hanno in Manganelli, occorre ricordarlo, le categorie di “centro” e “periferia”). Del resto, pur interrompendosi, le sue opere non ‘finiscono’ propriamente; un aspetto, questo, che è evidente pure dal trattamento che proprio l’apocalisse – il modello-archetipo narrativo-cognitivo scelto da Kermode per indagare il Sense of an Ending – ha nei testi manganelliani.
description: SigMa - Rivista di Letterature comparate, Teatro e Arti dello spettacolo, N. 1 (2017)
Proceedings International Workshop on Developments in Implicit Computational complExity
Creators: name: Baillot, Patrick
Publisher: name: arXiv
Year: 2010
Subjects: subject: Logic in Computer Science (cs.LO)
subject: Computational Complexity (cs.CC)
subject: Programming Languages (cs.PL)
subject: FOS: Computer and information sciences
subject: F.3.2; F.3.3; F.4.1

description: This volume contains the proceedings of the International Workshop on Developments in Implicit Computational complExity (DICE 2010), which took place on March 27-28 2010 in Paphos, Cyprus, as a satellite event of the Joint European Conference on Theory and Practice of Software, ETAPS 2010. Implicit Computational Complexity aims at studying computational complexity without referring to external measuring conditions or particular machine models, but instead by considering restrictions on programming languages or logical principles implying complexity properties. The aim of this workshop was to bring together researchers working on implicit computational complexity, from its logical and semantical aspects to those related to the static analysis of programs, so as to foster their interaction and to give newcomers an overview of the current trends in this area.
Sul “Senso della fine” di Frank Kermode
Creators: name: Maffei, Giovanni
Publisher: name: SigMa - Rivista di Letterature comparate, Teatro e Arti dello spettacolo
Year: 2018

description: Un’illustrazione sintetica delle idee centrali del Senso della fine di Frank Kermode, e del loro congegno, offerta al Laboratorio come una base di discussione, un attrezzo maneggevole di lavoro. La proposta emblematica di tre grandi romanzi dell’Ottocento europeo, non nominati da Kermode nel suo libro, a mostrare la versatilità simbolica del “paradigma apocalittico” già in quel secolo, prima ancora cioè dell’esplosiva moltiplicazione dei “sensi della fine” nella letteratura del Modernismo.
description: SigMa - Rivista di Letterature comparate, Teatro e Arti dello spettacolo, N. 1 (2017)
`Interpolating' differential reductions of multidimensional integrable hierarchies
Creators: name: Bogdanov, L. V.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: We transfer the scheme of constructing differential reductions, developed recently for the case of the Manakov-Santini hierarchy, to the general multidimensional case. We consider in more detail the four-dimensional case, connected with the second heavenly equation and its generalization proposed by Dunajski. We give a characterization of differential reductions in terms of the Lax-Sato equations as well as in the framework of the dressing method based on nonlinear Riemann-Hilbert problem.
description: Based on the talk at NLPVI, Gallipoli, 15 pages