cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Effects of measures on phase transitions in two cooperative susceptible-infectious-recovered dynamics
Creators: name: Khazaee, Adib
name: Ghanbarnejad, Fakhteh
Publisher: name: arXiv
Year: 2021
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: In recent studies, it has been shown that a cooperative interaction in a co-infection spread can lead to a discontinuous transition at a decreased threshold. Here, we investigate effects of immunization with a rate proportional to the extent of the infection on phase transitions of a cooperative co-infection. We use the mean-field approximation to illustrate how measures that remove a portion of the susceptible compartment, like vaccination, with high enough rates can change discontinuous transitions in two coupled susceptible-infectious-recovered dynamics into continuous ones while increasing the threshold of transitions. First, we introduce vaccination with a fixed rate into a symmetric spread of two diseases and investigate the numerical results. Second, we set the rate of measures proportional to the size of the infectious compartment and scrutinize the dynamics. We solve the equations numerically and analytically and probe the transitions for a wide range of parameters. We also determine transition points from the analytical solutions. Third, we adopt a heterogeneous mean-field approach to include heterogeneity and asymmetry in the dynamics and see if the results corresponding to homogeneous symmetric case stand.
Predicting hexadecane–air equilibrium partition coefficients (L) using a group contribution approach constructed from high quality data
Creators: name: T.N. Brown
Publisher: name: Taylor & Francis
Year: 2014
Subjects: Uncategorized

description: A group contribution-based quantitative structure–property relationship (QSPR) for the hexadecane–air equilibrium partition coefficients (L) of organic chemicals is developed using the iterative fragment selection (IFS) approach. This new QSPR includes in its training and external validation data sets L values for a large number of structurally complex chemicals measured by the same group using consistent methods. The resulting QSPR has better predictive power than other prediction methods trained primarily using data for chemicals of simpler structures, and measurements of L values from diverse sources. For a subset of chemicals in which the L values have non-additive effects caused by intramolecular hydrogen bonds, the new QSPR gives much better performance in comparison to the most commonly used prediction method.
Enhancing Mobile Banking Service Availability Using Machine Learning
Creators: name: Said, Ahmed Said
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2018

description: One of the main obstacles for adoption of mobile banking is that of security concern. This concern is becoming a reality in the case of mobile core inter-node protocol, Signaling System number 7 (SS7). SS7 was developed with the assumption of trusted network within and among operators. With growing number of value-added service providers and roaming partners connecting to operators, the trusted network is no longer a closed network. Attackers continue to exploit vulnerabilities of SS7 network to conduct attacks that compromise confidentiality, integrity and availability of mobile banking users and mobile network operators. In Ethiopia, Short Message Service (SMS) and Unstructured Supplementary Service Data (USSD) are mainly used for mobile banking. These services are both vulnerable to availability attacks. This thesis is an effort to detect SMS availability attacks on Mobile Application Part (MAP) layer of SS7. To mitigate these attacks, machine learning techniques using real SMS traffic data from ethio telecom is used for adaptive detection of abnormal SMS. A novel approach of using aggregation of Message Origination (MO) error codes is proposed for class feature extraction. A combination of expert judgments, literature reviews and information gain are used for optimal feature selection. As a result, it is recommended to use origination, destination, and mobile switching center address and write time as optimal features. To solve the problem of attack message detection, PART, Random Forest and J48 algorithms are compared. It is found that J48 has a superior performance with an accuracy of 98.6465% and model build time of 3.71 seconds.
Acoustic resonators: symmetry classification and multipolar content of the eigenmodes
Creators: name: Tsimokha, Mariia
name: Igoshin, Vladimir
name: Nikitina, Anastasiya
name: Petrov, Mihail
name: Toftul, Ivan
name: Frizyuk, Kristina
Publisher: name: arXiv
Year: 2021
Subjects: subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: Acoustics recently became a versatile platform for discovering novel physical effects and concepts at a relatively simple technological level. On this way, single resonators and the structure of their resonant modes play a central role and define the properties of complex acoustic systems such as acoustic metamaterials, phononic crystals, and topological structures. In this paper, we present a powerful method allowing a qualitative analysis of eigenmodes of resonators in the linear monochromatic acoustic domain based on multipole classification of eigenmodes. Using the apparatus of group theory, we explain and predict the structure of the scattered field knowing only the symmetry group of the resonator by connecting the multipolar content of incident and scattered fields. Such an approach can be utilized for developing resonators with predesigned properties avoiding time-consuming simulations. We have performed full multipole symmetry classification for a number of resonators geometries, and tightened it with scattering spectra profiles.
description: 14 pages, 14 figures, 1 table
Methodology Appendix for "An Equitable Phase Out of Fossil Fuel Extraction
Creators: name: Holz, Ceecee
name: Kartha, Sivan
name: Muttitt, Greg
name: Athanasiou, Tom
Publisher: name: Extraction Equity Working Group
Year: 2024

description: This document serves to describe the methodology employed in the 2023 report by the Civil Society Equity Review entitled “An Equitable Phase Out of Fossil Fuel Extraction: Towards a Reference Framework for a Fast and Fair Rapid Global Phase Out of Coal, Oil and Gas” (Civil Society Equity Review 2023). Specifically, these methods are used in calculating the equitable phase-out timelines as well as the provision and receipt of financial support to implement these phase-out timelines.

This document provides additional information about the rationale of certain methodological decisions that go beyond the level of detail in the report, provides additional background data on some of the indicators used, details our data sources and describes their limitations, and describes the formulas used for the calculations. While many of these methodological choices were made on purely technical grounds, others are inherently normative. For key normatively salient choices, the underlying ethical issues were explained to and discussed with our civil society partners, and the equity-related choices were clarified, deliberated, and resolved in a manner that the partners agreed were consistent with their ethical positions, and this analysis was implemented in accordance with those choices. In the case of less critical choices that still had some degree of normative relevance, the technical team implemented choices that most consistently reflected the CSO partner's underlying principles. This appendix focuses primarily on technical aspects, with a reminder of normative elements where relevant, which are addressed in greater detail in the main report.
Analytical solution for nonadiabatic quantum annealing to arbitrary Ising spin Hamiltonian
Creators: name: Yan, Bin
name: Sinitsyn, Nikolai A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Ising spin Hamiltonians are often used to encode a computational problem in their ground states. Quantum Annealing (QA) computing searches for such a state by implementing a slow time-dependent evolution from an easy-to-prepare initial state to a low energy state of a target Ising Hamiltonian of quantum spins, $H_I$. Here, we point to the existence of an analytical solution for such a problem for an arbitrary $H_I$ beyond the adiabatic limit for QA. This solution provides insights into the accuracy of nonadiabatic computations. Our QA protocol in the pseudo-adiabatic regime leads to a monotonic power-law suppression of nonadiabatic excitations with time $T$ of QA, without any signature of a transition to a glass phase, which is usually characterized by a logarithmic energy relaxation. This behavior suggests that the energy relaxation can differ in classical and quantum spin glasses strongly, when it is assisted by external time-dependent fields. In specific cases of $H_I$, the solution also shows a considerable quantum speedup in computations.
description: 15 pages, 8 figures
Simplified molecular input line entry system-based optimal descriptors: QSAR modelling for voltage-gated potassium channel subunit Kv7.2
Creators: name: P. Ganga Raju Achary
Publisher: name: Taylor & Francis
Year: 2014
Subjects: Uncategorised

description: CORAL software has been used to build quantitative structure–activity relationships (QSARs) for the prediction of binding affinities (pEC50, i.e., minus decimal logarithm of the 50% effective concentration) of 35 potent inhibitors towards the voltage-gated potassium channel subunit Kv7.2. The pEC50 has been modelled using eight random splits, with the following representations of the molecular structure: (i) hydrogen-suppressed graph (HSG); (ii) simplified molecular input line entry system (SMILES); (iii) graph atomic orbitals (GAOs) and (iv) hybrid representation, which is HSG together with SMILES. These models have been examined using three methods, the classic scheme, balance correlation, and balance correlation with ideal slope. The QSAR model based on single optimal descriptors using SMILES provided the best accuracy for the prediction of the pEC50. The robustness of these models has been checked using parameters such as rm2, r*m2, , and using a randomization technique. The best QSAR model based on single optimal descriptors has been applied to study the in vitro structure–activity relationships of pyrazolo[1,5-a]pyrimidin-7(4H)-one derivatives as Kv7.2 modulators. The pEC50 is found to be significantly increased by the incorporation of –OH, –NO2 or –Br groups in place of one –F, whereas –NH2 has a negative effect on the pEC50 values.
Parallel Feedforward Compensation for Output Synchronization: Fully Distributed Control and Indefinite Laplacian
Creators: name: Li, Mengmou
name: Lestas, Ioannis
name: Qiu, Li
Publisher: name: arXiv
Year: 2021
Subjects: subject: Systems and Control (eess.SY)
subject: Multiagent Systems (cs.MA)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: This work is associated with the use of parallel feedforward compensators (PFCs) for the problem of output synchronization over heterogeneous agents and the benefits this approach can provide. Specifically, it addresses the addition of stable PFCs on agents that interact with each other using diffusive couplings. The value in the application of such PFC is twofold. Firstly, it has been an issue that output synchronization among passivity-short systems requires global information for the design of controllers in the cases when initial conditions need to be taken into account, such as average consensus and distributed optimization. We show that a stable PFC can be designed to passivate a passivity-short system while its output asymptotically vanishes as its input tends to zero. As a result, output synchronization is achieved among these systems by fully distributed controls without altering the original consensus results. Secondly, in the literature of output synchronization over signed weighted graphs, it is generally required that the graph Laplacian be positive semidefinite, i.e., $L \geq 0$ for undirected graphs or $L + L^T \geq 0$ for balanced directed graphs. We show that the PFC serves as output feedback to the communication graph to enhance the robustness against negative weight edges. As a result, output synchronization is achieved over a signed weighted and balanced graph, even if the corresponding Laplacian is not positive semidefinite.
description: 10 pages, 8 figures, Systems & Control Letters
Geometric effects in the infinite-layer nickelates
Creators: name: Bernardini, F.
name: Bosin, A.
name: Cano, A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Geometric effects in the infinite-layer nickelates $R$NiO$_2$ associated with the relative size of the $R$-site atom are investigated via first-principles calculations. We consider, in particular, the prospective YNiO$_2$ material to illustrate the impact of these effects. Compared to LaNiO$_2$, we find that the La $\to$ Y substitution is equivalent to a pressure of 19 GPa and that the presence of topotactic hydrogen can be precluded. However, the electronic structure of YNiO$_2$ departs from the cuprate-like picture due to an increase in both self-doping effect and $e_g$ hybridization. Furthermore, we find that geometric effects introduce a quantum critical point in the $R$NiO$_2$ series. This implies a $P4/mmm \leftrightarrow I4/mcm$ structural transformation associated to a $A_3^+$ normal mode, according to which the oxygen squares undergo an in-plane rotation around Ni that alternates along $c$. We find that such a $A_3^+$-mode instability has a generic character in the infinite-layer nickelates and can be tuned via either the effective $R$-site atom size or epitaxial strain.
description: 6 pages, 4 figures, 4 tables
Simone Carati, Il mondo là fuori. Narrazione, esperienza, scrittura, Milano, Ledizioni, 2023, 210 pp., € 28,00
Creators: name: Muzio, Chiara
Publisher: name: Status Quaestionis
Year: 2024

description: Status Quaestionis, N. 26 (2024): Teoria/Theory. Perspectives on Literary Criticism and Comparative Literature
Topological structural alerts modulations of mammalian cell mutagenicity for halogenated derivatives
Creators: name: A. Pérez-Garrido
name: F. Girón-Rodríguez
name: A. Morales Helguera
name: F. Borges
name: R.D. Combes
Publisher: name: Taylor & Francis
Year: 2014
Subjects: Uncategorised

description: Genotoxicity is a key toxicity endpoint for current regulatory requirements regarding new and existing chemicals. However, genotoxicity testing is time-consuming and costly, and involves the use of laboratory animals. This has motivated the development of computational approaches, designed to predict genotoxicity without the need to conduct laboratory tests. Currently, many existing computational methods, like quantitative structure–activity relationship (QSAR) models, provide limited information about the possible mechanisms involved in mutagenicity or predictions based on structural alerts (SAs) do not take statistical models into account. This paper describes an attempt to address this problem by using the TOPological Substructural MOlecular Design (TOPS-MODE) approach to develop and validate improved QSAR models for predicting the mutagenicity of a range of halogenated derivatives. Our most predictive model has an accuracy of 94.12%, exhibits excellent cross-validation and external set statistics. A reasonable interpretation of the model in term of SAs was achieved by means of bond contributions to activity. The results obtained led to the following conclusions: primary halogenated derivatives are more mutagenic than secondary ones; and substitution of chlorine by bromine increases mutagenicity while polyhalogenation decreases activity. The paper demonstrates the potential of the TOPS-MODE approach in developing QSAR models for identifying structural alerts for mutagenicity, combining high predictivity with relevant mechanistic interpretation.
Predicting hexadecane–air equilibrium partition coefficients (L) using a group contribution approach constructed from high quality data
Creators: name: T.N. Brown
Publisher: name: Taylor & Francis
Year: 2014
Subjects: Uncategorised

description: A group contribution-based quantitative structure–property relationship (QSPR) for the hexadecane–air equilibrium partition coefficients (L) of organic chemicals is developed using the iterative fragment selection (IFS) approach. This new QSPR includes in its training and external validation data sets L values for a large number of structurally complex chemicals measured by the same group using consistent methods. The resulting QSPR has better predictive power than other prediction methods trained primarily using data for chemicals of simpler structures, and measurements of L values from diverse sources. For a subset of chemicals in which the L values have non-additive effects caused by intramolecular hydrogen bonds, the new QSPR gives much better performance in comparison to the most commonly used prediction method.
Additional file 7 of Downregulation of GLYR1 contributes to microsatellite instability colorectal cancer by targeting p21 via the p38MAPK and PI3K/AKT pathways
Creators: name: Zhiyan Hu
name: Long, Ting
name: Yidan Ma
name: Jiaxian Zhu
name: Lingfang Gao
name: Zhong, Yan
name: Wang, Xia
name: Xiaoyan Wang
name: Zuguo Li
Publisher: name: figshare
Year: 2020
Subjects: subject: Biophysics
subject: Biochemistry
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
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: Developmental Biology
subject: Cancer

description: Additional file 7: Table S1. Antibodies used for Western blotting, Coimmunoprecipitation and Immunofluorescence.
SEV – a software toolbox for large scale analysis and visualization of polysomnography data
Creators: name: Hyatt E. Moore IV
name: Mignot, Emmanuel
Publisher: name: Taylor & Francis
Year: 2015
Subjects: subject: Information and Computing Sciences
subject: Biological Sciences
subject: Physiology
subject: FOS: Biological sciences
subject: Engineering

description: SEV is a graphical toolbox designed in MATLAB for displaying polysomnography (PSG) signals recorded during sleep studies, prototyping signal-processing algorithms and automating sleep feature extraction methods across large collections or cohorts of such studies. Format imported are European Data Formats and event/hypnogram files. Time-series analysis can be performed using a suite of classifiers, filters and signal decomposition tools (e.g. wavelets) developed internally or implemented from validated methods published by others. Power spectral analysis can be performed using either periodogram averaging or multiple spectrum independent component analysis. The tool is highly configurable and provides a simple framework for classifier optimization and extensibility. MATLAB's parallel processing toolbox is utilized during batch processing. Output formats include MySQL database entry, tab-delimited text and MATLAB archive (.MAT). The tool is well suited for genetic or epidemiological sleep research questions requiring rigorous, robust and reproducible evaluation of a PSG-based sleep study cohort. Current built-in applications include modules to detect and quantify rapid eye movements and spindle activity (using existing algorithms), inter-channel electroencephalography coherence and a detector developed in house to quantify periodic leg movements during sleep. SEV is open source and freely available under a common creative license.
Effects of molecular architecture of phospholipid polymers on surface modification of segmented polyurethanes
Creators: name: Yamaoka, Tetsuji
name: Ishihara, Kazuhiko
name: Yihua Liu
name: Inoue, Yuuki
name: Sakata, Sho
name: Sachiro Kakinoki
Publisher: name: Taylor & Francis
Year: 2014
Subjects: Uncategorized

description: To modify the surface properties of segmented polyurethane (SPU), effects of the molecular architecture of the 2-methacryloyloxyethyl phosphorylcholine (MPC) polymers on the performance of the SPU/MPC polymer membrane were investigated. We combined the random-type, block-type, and graft-type of the MPC polymers with a typical SPU, Tecoflex® using double solution casting procedure. The graft-type MPC polymers composed of a poly(MPC) main chain and poly(2-ethylhexyl methacrylate (EHMA)) side chains were synthesized through the combination of two different living radical polymerization techniques to regulate the density and chain length of the side chains. The SPU membranes modified with the MPC polymers were characterized using X-ray photoelectron spectroscopy and Fourier transform infrared spectroscopy. The results revealed that the MPC units were located on the SPU surface. Although the breaking strength of the SPU membranes modified with block-type poly(MPC-block-EHMA) and graft-type poly(MPC-graft-EHMA) was lower than that of SPU membranes modified with random-type poly(MPC-random-EHMA), their breaking strengths were adequate for manufacturing medical devices. On the other hand, better stability was observed in the MPC polymer layer on the SPU membrane after immersion in an aqueous medium, wherein the SPU membrane had been modified with the poly(MPC-graft-EHMA). This was because of the intermixing of the hydrophobic poly(EHMA) segments in the domain of the hard segments in the SPU membrane. After this modification, each SPU/MPC polymer membrane showed hydrophilic nature based on the MPC polymers and a dramatic suppression of protein adsorption. From these results, we concluded that the SPU membrane modified with the poly(MPC-graft-EHMA) was one of the promising polymeric biomaterials for making blood-contacting medical devices.
Additional file 8 of Downregulation of GLYR1 contributes to microsatellite instability colorectal cancer by targeting p21 via the p38MAPK and PI3K/AKT pathways
Creators: name: Zhiyan Hu
name: Long, Ting
name: Yidan Ma
name: Jiaxian Zhu
name: Lingfang Gao
name: Zhong, Yan
name: Wang, Xia
name: Xiaoyan Wang
name: Zuguo Li
Publisher: name: figshare
Year: 2020
Subjects: subject: Biophysics
subject: Biochemistry
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
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: Developmental Biology
subject: Cancer

description: Additional file 8: Table S2. GLYR1 Exon13 Mutation in CRC cell lines.
From Affine $A_4$ to Affine $H_2$: Group Theoretical Analysis of Five-fold Tilings
Creators: name: Koca, Nazife Ozdes
name: Koc, Ramazan
name: Koca, Mehmet
name: Al-Reasi, Rehab
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mathematical Physics (math-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences
subject: 52B10, 52B11, 52B15

description: The projections of the lattices, may be used as models of quasicrystals, and the particular affine extension of the $H_2$ symmetry as a subgroup of $A_4$, discussed in the work, presents a different perspective to 5-fold symmetric quasicrystallography. Affine $H_2$ is obtained as the subgroup of the affine $A_4$. The infinite group with local dihedral symmetry of order 10 operates on the Coxeter plane of the root and weight lattices of $A_4$ whose Voronoi cells tessellate the 4D Euclidean space possessing the affine $A_4$ symmetry. It is shown that the projection of the Voronoi cell of the root lattice tiles the Coxeter plane with thick and thin rhombuses with the action of the affine $H_2$ symmetry. Projection of the Voronoi cell of the weight lattice onto the Coxeter plane tessellates the plane with four different tiles: thick and thin rhombuses with different edge lengths obtained from the projection of the square faces and two types of hexagons obtained from the projection of the hexagonal faces of the Voronoi cell. Structure of the local dihedral symmetry $H_2$ fixing a particular point on the Coxeter plane is determined.
description: 18 pages, 9 figures
Additional file 9 of Downregulation of GLYR1 contributes to microsatellite instability colorectal cancer by targeting p21 via the p38MAPK and PI3K/AKT pathways
Creators: name: Zhiyan Hu
name: Long, Ting
name: Yidan Ma
name: Jiaxian Zhu
name: Lingfang Gao
name: Zhong, Yan
name: Wang, Xia
name: Xiaoyan Wang
name: Zuguo Li
Publisher: name: figshare
Year: 2020
Subjects: subject: Biophysics
subject: Biochemistry
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
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: Developmental Biology
subject: Cancer

description: Additional file 9: Table S3. Primer sequences for qRT-PCR (5′ to 3′).
Effects of molecular architecture of phospholipid polymers on surface modification of segmented polyurethanes
Creators: name: Yamaoka, Tetsuji
name: Ishihara, Kazuhiko
name: Yihua Liu
name: Inoue, Yuuki
name: Sakata, Sho
name: Sachiro Kakinoki
Publisher: name: Taylor & Francis
Year: 2014
Subjects: Uncategorised

description: To modify the surface properties of segmented polyurethane (SPU), effects of the molecular architecture of the 2-methacryloyloxyethyl phosphorylcholine (MPC) polymers on the performance of the SPU/MPC polymer membrane were investigated. We combined the random-type, block-type, and graft-type of the MPC polymers with a typical SPU, Tecoflex® using double solution casting procedure. The graft-type MPC polymers composed of a poly(MPC) main chain and poly(2-ethylhexyl methacrylate (EHMA)) side chains were synthesized through the combination of two different living radical polymerization techniques to regulate the density and chain length of the side chains. The SPU membranes modified with the MPC polymers were characterized using X-ray photoelectron spectroscopy and Fourier transform infrared spectroscopy. The results revealed that the MPC units were located on the SPU surface. Although the breaking strength of the SPU membranes modified with block-type poly(MPC-block-EHMA) and graft-type poly(MPC-graft-EHMA) was lower than that of SPU membranes modified with random-type poly(MPC-random-EHMA), their breaking strengths were adequate for manufacturing medical devices. On the other hand, better stability was observed in the MPC polymer layer on the SPU membrane after immersion in an aqueous medium, wherein the SPU membrane had been modified with the poly(MPC-graft-EHMA). This was because of the intermixing of the hydrophobic poly(EHMA) segments in the domain of the hard segments in the SPU membrane. After this modification, each SPU/MPC polymer membrane showed hydrophilic nature based on the MPC polymers and a dramatic suppression of protein adsorption. From these results, we concluded that the SPU membrane modified with the poly(MPC-graft-EHMA) was one of the promising polymeric biomaterials for making blood-contacting medical devices.
Positivity and renormalization of parton densities
Creators: name: Collins, John
name: Rogers, Ted C.
name: Sato, Nobuo
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: There have been recent debates about whether $\overline{\text{MS}}$ parton densities exactly obey positivity bounds (including the Soffer bound), and whether the bounds should be applied as a constraint on global fits to parton densities and on nonperturbative calculations. A recent paper (JHEP ${\bf \text{11}}$ (2020) 129) appears to provide a proof of positivity in contradiction with earlier work by other authors. We examine their derivation and find that its primary failure is in the apparently uncontroversial statement that bare pdfs are always positive. We show that under the conditions used in the derivation, that statement fails. We provide some elementary calculations in a model QFT that show how this situation can generically arise in reality. In addition, we observe that the methods used in the derivation are in common with much, but not all, other work where factorization is derived. Our examination pinpoints considerable difficulties with these methods that render them either wrong or highly problematic. The issue of positivity highlights that these methods can lead to wrong results of phenomenological importance. From our analysis we identify the restricted situations in which positivity can be violated.
description: 24 pages, 3 figures, version published in physical review D
The effects of molecular structure on sol-to-gel transition of biodegradable poly(depsipeptide-co-lactide)-g-PEG copolymers
Creators: name: Takahashi, Akihiro
name: Umezaki, Masaya
name: Yoshida, Yasuyuki
name: Kuzuya, Akinori
name: Ohya, Yuichi
Publisher: name: Taylor & Francis
Year: 2014
Subjects: Uncategorized

description: We report on the effects of number and length of PEG chains in poly(depsipeptide-co-dl-lactide)-g-poly(ethylene glycol) (P(DG-dl-LA)-g-PEG) copolymers on their sol-to-gel transition behavior. The graft-type copolymer is suitable for the systematic study of the effects of molecular structure and hydrophilic/hydrophobic balance on its sol-to-gel transition. We prepared various P(DG-dl-LA)-g-PEG copolymers through coupling reactions between the pendant carboxylic acid groups of P(GD-dl-LA) and the end hydroxyl group of MeO-PEG having various molecular weights. Temperature-responsive sol-to-gel transition of the obtained copolymer solution in phosphate-buffered solution (pH 7.4, ionic strength = 0.14) was investigated by the test tube inverting method and rheological measurements. P(GD-dl-LA)-g-PEG copolymer prepared from higher molecular weight PEG showed higher sol-to-gel transition temperatures compared with the copolymers prepared from lower molecular weight PEG, although these copolymers have similar weight content of PEG (23–24 wt.%). Similar trends were observed for groups of copolymers whose PEG contents were 27 or 30 wt.%. These results are informative for providing strategies on rational design of thermo-gelling polymers.
Customers Segmentation for Profitability Enhancement Using Data Mining Technique: The Case of ethio telecom
Creators: name: Tajudin, Mohammed
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2020

description: Customer segmentation is dividing of customers into groups of individuals that have common characteristics or traits. By segmenting customers based on their usage behavior, telecom companies can better target and classify their customers, provide the services that meet their expectations and increase profitability. On the contrary, companies with improper segmentation or luck of segmentation facing the problem of providing the exact product or service to meet the actual customer needs. Incorrect profit prediction and wastage of resource utilization are the main problems of ethio telecom which results from poor customer segmentation. To mitigate the segmentation problem this study focuses on segmenting telecom customers based on their usage behavior using unsupervised clustering techniques. K-means algorithm was used to cluster the Call Detail Record (CDR) data. Before clustering CDR data were collected, relevant attributes selected and preprocessing techniques such as data cleaning, data aggregation, data integration, and data formatting were performed. In addition, four datasets were formed by summarizing the data on a monthly base. The experimentation results in eight different clusters. These clusters were analyzed using quantile score techniques. The clusters were ranked and mapped with customer segmentation type. Among the clusters, the cluster with 236 subscribers was scored the highest in terms of duration, frequency and money. As a result, this cluster was chosen as a platinum customer type. They are highly profitable customers, vital to affect its revenue and need to serve well by the company.
Reshaping Translation and Theories of Translation in the Digital Age
Creators: name: Sofo, Giuseppe
Publisher: name: Status Quaestionis
Year: 2024

description: This article analyses the reshaping of the practice of translation and of translation theories in the digital age. Focusing on the role of the “cultural turn” and of the “technological turn” of Translation Studies, and of the paradigm shift of the digital age, which value difference and variablity and challenge the concept of the original, the article will investigate the new readings and perceptions of translation as a product, as well as the reshaping of future theories of translation offered by this new paradigm.
description: Status Quaestionis, N. 26 (2024): Teoria/Theory. Perspectives on Literary Criticism and Comparative Literature
Experimental evaluation of sensor attacks and defense mechanisms in feedback systems
Creators: name: Umsonst, David
name: Sandberg, Henrik
Publisher: name: arXiv
Year: 2021
Subjects: subject: Systems and Control (eess.SY)
subject: Optimization and Control (math.OC)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Mathematics

description: In this work, we evaluate theoretical results on the feasibility of, the worst-case impact of, and defense mechanisms against a stealthy sensor attack in an experimental setup. We demonstrate that for a controller with stable dynamics the stealthy sensor attack is possible to conduct and the theoretical worst-case impact is close to the achieved practical one. However, although the attack should theoretically be possible when the controller has integral action, we show that the integral action slows the attacker down and the attacker is not able to remain stealthy if it has not perfect knowledge of the controller state. In addition to that, we investigate the effect of different anomaly detectors on the attack impact and conclude that the impact under detectors with internal dynamics is smaller. Finally, we use noise injection into the controller dynamics to unveil the otherwise stealthy attacks.
description: Accepted in Control Engineering Practice. The paper is published as OpenAccess, so please find the latest version in Volume 124 of Control Engineering Practice
Ultrafast optical excitation of magnetic dynamics in van der Waals magnets: Coherent magnons and BKT dynamics in NiPS$_3$
Creators: name: Seifert, Urban F. P.
name: Ye, Mengxing
name: Balents, Leon
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Optical pump-probe experiments carried out in the time domain reveal both the intrinsic low energy dynamics and its connections to higher energy excitations in correlated electron systems. In this work, we propose two microscopic mechanisms for the optical generation of coherent magnetic modes in van der Waals magnets, and derive the corresponding effective light-spin interactions: either through pumping atomic orbital excitations resonantly or via a light-induced Floquet spin Hamiltonian, the ground state of the system is driven out of equilibrium. The subsequent long-time relaxational dynamics can then be probed using, e.g. the magneto-optical Kerr effect or transient grating spectroscopy. As an example, we apply our framework to NiPS$_3$, which is magnetically ordered in the bulk, and is conjectured to realize the XY model in the monolayer limit. Our theory makes explicit how the material's low-energy response depends sensitively on the microscopic details of the light-spin coupling as well as pump fluence, frequency and polarization. For the case of bulk NiPS$_3$, we find quantitative agreement with recent experiments by Afanasiev et al. [Science Advances 7, abf3096 (2021)]. We further propose pump-probe experiments for monolayer NiPS$_3$ and detail how anomalous relaxational behaviour may reveal excitations of a (proximate) BKT phase in a proposed effective XY model.
description: 15+6 pages, 5 figures; v2 (added Fig. 1, clarifying comments in Sec. II, and additional minor modifications)
Application-Aware Data Center Network Bandwidth Utilization: the case of ethio telecom
Creators: name: Zerihun, Mamo
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2018

description: The existing ethio telecom data center network (DCN) is the traditional model which provides only the Best Effort (BE) traffic delivery service on a layer three links with the same priorities for all applications traffic. A diversity of applications is running on the data centers, the scarcity innetwork bandwidth of data centers become the performance bottleneck for the integration of enterprise systems. The most important point is that the existing network has not a dynamic bandwidth management strategy, which lacks of flexible bandwidth utilization among different types of applications. To guarantee the network performance for system integration, an efficient in-network bandwidth management should be considered. In this thesis work, a QoS model for an aggregated applications traffic in the DCN with a constrained bandwidth and with a consideration of the business criticality of the applications has been designed. The model nearly supports guarantees of QoS to real-time traffic without reserved bandwidth, and it assured forwarding high priority class traffic for business and mission critical applications. The design approach is based on the Internet Engineering Task Force (IETF) Differentiated Service(DS) Per-Hop-Behavior (PHB) group. Different types of Active queue management(AQM) and packet scheduler algorithms have been compared on the proposed design to minimize the packet loss and delay of each aggregated traffic class. In addition, the dynamic Benefit weighted scheduling (DB-WS) algorithm is modified to adapt with our solution, the algorithm dynamically allocated bandwidth based on the average queue length of each service class. Extensive simulation results have shown that our proposed design is capable of improving the bandwidth utilization as well as providing desirable network performance for real-time and business-critical applications on a bottleneck link and also reduce the total packet loss by 1.34 %.
Palinsesti/Paratesti: le teorie transmediali della contemporaneità
Creators: name: Medaglia, Francesca
Publisher: name: Status Quaestionis
Year: 2024

description: The aim of this essay is to investigate the new theories of transmediality in relation to contemporary paratexts, keeping in mind and questioning on the one hand the studies on Genette’s palimpsests and paratexts and on the other the theoretical contribution by Mittell, which defines the three main paratextual typologies of transmediality. From a theoretical. point of view, I will take into account the transmedia storytelling, as characterized by Jenkins and by Sepinwall. In fact, over time, television series, with their acquired complexity, have managed to become the culturally hegemonic form of storytelling, proving to be able to tell very long stories, allowing the characters to evolve over a particularly long period of time. In the current state of media evolution, television seems able to open a greater number of possibilities than other media to those who want to build complex narratives. This essay will discuss modern transmedia theories from a theoretical point of view in relation to the analysis of different types of paratext in relation to television series, in order to verify the ability of transmedia theories to conceptualize the expansions of storytelling.
description: Status Quaestionis, N. 26 (2024): Teoria/Theory. Perspectives on Literary Criticism and Comparative Literature
The binding modes of cationic porphyrin-anthraquinone hybrids to DNA duplexes: in silico study
Creators: name: Arba, Muhammad
name: Daryono H. Tjahjono
Publisher: name: Taylor & Francis
Year: 2014
Subjects: subject: Developmental Biology
subject: Biological Sciences
subject: Chemistry
subject: Pharmacology
subject: Cell Biology
subject: Microbiology
subject: FOS: Biological sciences
subject: Physics
subject: Engineering
subject: Biochemistry
subject: Biophysics
subject: Molecular Biology

description: Cationic porphyrin-anthraquinone hybrids bearing peripheral substituents, either pyridine, imidazole, or pyrazole rings have been investigated for their binding mode to DNA duplexes. The four kinds of DNA duplexes were used, which represent intercalation and groove binding modes. AutoDock 4.2 was used to dock nine hybrid compounds to four DNA duplexes, while monitoring of conformational changes of four best hybrid–DNA complexes during 2 ns was performed by Amber9 molecular dynamics package. The binding energy calculation of best four complexes was then carried out using MMPBSA method. The hybrid compounds interacted to DNA duplexes through intercalation and groove binding modes. The minor groove binding of DNA was energetically preferred by cationic porphyrin hybrids due to favorable electrostatic and van der Waals interactions. Both electrostatic and van der Waals contributions were able to distinguish the binding mode of porphyrin hybrid to DNA duplexes.
An Improved Technique for Enterprise Service Bus Data Transformation: The Case of ethio telecom
Creators: name: Alemtsehay, Kebede
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2018

description: Service Oriented Architecture (SOA) is an integration architecture approach that is based on the concept of a service and addresses, the requirements of loosely coupled, standards-based, and protocol independent distributed computing. SOA used Enterprise Service Bus (ESB) to realize its principle. ESB is architecture to overcome the limitation of traditional architectures. One of its main functions is Data Transformation, which is the conversion process of data structure among heterogeneous systems during integration. Data transformation consists of four data transformation functions which are name and value transformation, attribute aggregation and splitting. Its performance depends on the data exchange format and transformation functions complexity. Most ESB platforms adopt XML-based format as their common data model, which is quite time consuming on data transformation. The performance of XML based format is affecting the real time communication performance, mainly as complexity increases. The objective of this research is to analyze the performance of ESB data transformation functions and propose an improved technique for ESB data transformation data exchange formats. We used various research methods including literature review, informal interview and focus group discussion for gathering and analyzing relevant data. An improved technique for ESB data exchange formats is proposed that uses both XML and JSON formats based on complexity matrix in Complexity Analyses Algorithm (CAA). CAA uses JSON format for high complexity and XML for low complexity level. From the experiment result we have observed that JSON data format requires less time than XML data format while data complexities increases. So by implemented this improved technique we can enhance the performance of ESB data transformation.
Privacy attacks for automatic speech recognition acoustic models in a federated learning framework
Creators: name: Tomashenko, Natalia
name: Mdhaffar, Salima
name: Tommasi, Marc
name: Estève, Yannick
name: Bonastre, Jean-François
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computation and Language (cs.CL)
subject: Cryptography and Security (cs.CR)
subject: Sound (cs.SD)
subject: Audio and Speech Processing (eess.AS)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: This paper investigates methods to effectively retrieve speaker information from the personalized speaker adapted neural network acoustic models (AMs) in automatic speech recognition (ASR). This problem is especially important in the context of federated learning of ASR acoustic models where a global model is learnt on the server based on the updates received from multiple clients. We propose an approach to analyze information in neural network AMs based on a neural network footprint on the so-called Indicator dataset. Using this method, we develop two attack models that aim to infer speaker identity from the updated personalized models without access to the actual users' speech data. Experiments on the TED-LIUM 3 corpus demonstrate that the proposed approaches are very effective and can provide equal error rate (EER) of 1-2%.
description: Submitted to ICASSP 2022
CoCo Games: Graphical Game-Theoretic Swarm Control for Communication-Aware Coverage
Creators: name: Fernando, Malintha
name: Senanayake, Ransalu
name: Swany, Martin
Publisher: name: arXiv
Year: 2021
Subjects: subject: Robotics (cs.RO)
subject: Artificial Intelligence (cs.AI)
subject: Systems and Control (eess.SY)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: We propose a novel framework for real-time communication-aware coverage control in networked robot swarms. Our framework unifies the robot dynamics with network-level message-routing to reach consensus on swarm formations in the presence of communication uncertainties by leveraging local information. Specifically, we formulate the communication-aware coverage as a cooperative graphical game, and use variational inference to reach mixed strategy Nash equilibria of the stage games. We experimentally validate the proposed approach in a mobile ad-hoc wireless network scenario using teams of aerial vehicles and terrestrial user equipment (UE) operating over a large geographic region of interest. We show that our approach can provide wireless coverage to stationary and mobile UEs under realistic network conditions.
description: 8 pages, 7 figures