cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
METHODS FOR ENSURING AND PROVING FUNCTIONAL SAFETY OF AUTOMATIC TRAIN OPERATION SYSTEMS
Creators: name: I.B. Shubinsky
name: E.N. Rozenberg
name: H. Schäbe
Publisher: name: Reliability: Theory & Applications
Year: 2024
Subjects: Functional safety
artificial intelligence
automatic train operation system
machine vision
dependability
safety justification
safety case
statistical and experimental methods
expert methods
simulation methods
heuristic semi-Markov graph methods
process methods of compliance confirmation
safety device
control system
Markov model
standards

description: The paper examines the specificity of artificial intelligence-based automatic train operation systems. Justifying the functional safety (FS) of such systems is quite difficult. The paper proposes a process for proving the functional safety of intelligent systems. A hybrid control system for a shunting locomotive was developed and analysed. It combines machine vision (MV), train protection devices and manual control by a driver. A model is presented that allows examining the functional safety of a locomotive control system layer by layer, i.e., evaluating the time to safety degradation depending on the component failure and subsequent requirement of bringing the locomotive to a complete stop. This allows to improve the FS of the shunting locomotive control system with machine vision from SIL 2 to SIL 3 and maintaining it during sufficiently long periods of time (over a quarter of the mean time to system failure). The mean time of faultless operation of a locomotive control system until it has to be brought to a complete stop for safety reasons can be increased three times. A general approach is proposed to design the functional safety of automatic train operation systems. It is based on the division of the information processing process into two subprocesses, i.e., internal intelligent information processing onboard the locomotive for the purpose of decision-making regarding track vacancy and communication of initial visual information to the operating driver for decision-making. The division of this process must be combined with redundant machine vision facilities, regular comparison of the outputs of the onboard and fixed machine vision facilities, redundant comparison outputs, smoothing of the outputs in the process of locomotive movement.
Vortex lattice in spin-imbalanced unitary Fermi gas
Creators: name: Kopyciński, Jakub
name: Pudełko, Wojciech R.
name: Wlazłowski, Gabriel
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We investigate the properties of a spin-imbalanced and rotating unitary Fermi gas. Using a density functional theory (DFT), we provide insight into states that emerge as a result of a competition between Abrikosov lattice formation, spatial phase separation and the emergence of Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state. A confrontation of the experimental data [M. Zwierlein et al., Science 311, 492 (2006)] with theoretical predictions provides a remarkable qualitative agreement. In case of gas confined in a harmonic trap, the phase separation into a superfluid core populated by the Abrikosov lattice and a spin-polarized corona is the dominant process. Changing confinement to a box-like trap, reverts the spatial location of the component: gas being in the normal state is surrounded by superfluid threaded by quantum vortices. The vortex lattice no longer exhibits the triangular symmetry, and emergence of exotic geometries may be an indirect signature of the FFLO-like state formation in the system.
description: 10 pages, 7 figures
MI-K-MEAN ALGORITHM: A NEW APPROACH FOR FINANCIAL RISK ANALYSIS WITH MISSING DATA IMPUTATION IN BIG DATA
Creators: name: Ravindra Kumar
name: Diwakar Shukla
name: Pandey, Kamlesh Kumar
Publisher: name: Reliability: Theory & Applications
Year: 2024
Subjects: Missing Data
Mean Imputation (MI)
Credit card risk
K-mean clustering
Big data

description: The data mining is a tool of searching information from the data warehouse. Several mining algorithms exist in literature, one of the most common is the usual K-mean procedure. This generates centroids after every round of iteration. It is assumed that sample data is completely cleaned and noise free before the start of execution of the usual K-mean algorithm. If α% values are missing in sample data then after cleaning only (100-α)% values are available for the execution of the usual K-mean algorithm. Such bears a loss of information that affects the decision. This paper considers this problem and resolves such issue by replacing the missing data through imputed values calculated by the available values, called Mean Imputation (MI). It helps in financial risk analysis quite a lot because of risk prediction being taken on a larger sample (cleaned and imputed both). Several imputation procedures are available in literature. This paper considers the financial risk data as sample where the missing values of sample are imputed by the usual MeanImputation (MI) method and then on complete sample. Proposed MI-K-mean strategy is compared with no imputation usual procedure and found more efficient over the four-evaluation criterion of cluster formation while applying on risk data analysis.
Vibration damping platform for cavity quantum-electrodynamics experiments
Creators: name: Sauerwein, N.
name: Cantat-Moltrecht, T.
name: Grigoras, I. T.
name: Brantut, J. -P.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Instrumentation and Detectors (physics.ins-det)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We present a mechanical platform with enhanced vibration damping properties for cavity quantum-electrodynamics experiments. It is based on a composite design that combines a soft, vibration-damping core with a rigid shell maintaining optical alignment. It passively damps the vibrations generated by piezoelectric actuators controlling the mirror positions. The mechanical resonances of the platform, which lead to a length change of the cavity are efficiently suppressed up to 100 kHz. Our platform is ultra-high vacuum compatible and can be used in most applications, in particular where long cavities and optical access to the cavity center are required.
Etude du comportement thermique de pièces en acier protégées par peinture intumescente
Creators: name: Saulnier, Véronique
name: Durif, Sébastien
name: Bouchaïr, Abdelhamid
name: Audebert, Philippe
Publisher: name: Academic Journal of Civil Engineering
Year: 2020

description: L’étude présente porte sur la protection thermique de l’acier. De premiers essais au feu ont été réalisés sur des plaques d’acier protégées par peinture intumescente. Le but était d’évaluer l’influence de différents paramètres géométriques sur le développement de la protection (forme, taille). Un test a également été effectué sur une cornière afin d’observer l’expansion de la peinture sur une surface verticale et la jonction de deux plaques. Les essais suivants ont porté sur une seule taille de plaque avec différentes épaisseurs de peinture. Les résultats de ces essais ont ensuite servi de base afin de proposer une approche analytique simple susceptible de prédire l’échauffement de l’acier protégé par peinture intumescente.
description: Academic Journal of Civil Engineering, Vol 34 No 1 (2016): Special Issue - RUGC 2016 Liège
Active Inference and Epistemic Value in Graphical Models
Creators: name: van de Laar, Thijs
name: Koudahl, Magnus
name: van Erp, Bart
name: de Vries, Bert
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (stat.ML)
subject: Machine Learning (cs.LG)
subject: Neural and Evolutionary Computing (cs.NE)
subject: FOS: Computer and information sciences

description: The Free Energy Principle (FEP) postulates that biological agents perceive and interact with their environment in order to minimize a Variational Free Energy (VFE) with respect to a generative model of their environment. The inference of a policy (future control sequence) according to the FEP is known as Active Inference (AIF). The AIF literature describes multiple VFE objectives for policy planning that lead to epistemic (information-seeking) behavior. However, most objectives have limited modeling flexibility. This paper approaches epistemic behavior from a constrained Bethe Free Energy (CBFE) perspective. Crucially, variational optimization of the CBFE can be expressed in terms of message passing on free-form generative models. The key intuition behind the CBFE is that we impose a point-mass constraint on predicted outcomes, which explicitly encodes the assumption that the agent will make observations in the future. We interpret the CBFE objective in terms of its constituent behavioral drives. We then illustrate resulting behavior of the CBFE by planning and interacting with a simulated T-maze environment. Simulations for the T-maze task illustrate how the CBFE agent exhibits an epistemic drive, and actively plans ahead to account for the impact of predicted outcomes. Compared to an EFE agent, the CBFE agent incurs expected reward in significantly more environmental scenarios. We conclude that CBFE optimization by message passing suggests a general mechanism for epistemic-aware AIF in free-form generative models.
M/M/∞ QUEUE WITH IMPATIENT CUSTOMERS
Creators: name: Bura, Gulab Singh
Publisher: name: Reliability: Theory & Applications
Year: 2024
Subjects: M/M/∞ Queue
Transient Solution
Impatient Customers
Laplace Transform

description: In this paper we proposed an M/M/∞ queue with impatient customers. Generally, customers are impatient due to long waits in queue but in this work, we consider the case when customers are not impatient due to long waits but they are impatient due to the poor quality of service. We model and analyze this queueing system by using continued fraction technique and obtained the probability mass function of the customers present in the system in time dependent form. Also, we calculate the average queue size. Finally, some graphical representations are given to illustrate the model.
Additional file 3 of When the messenger is more important than the message: an experimental study of evidence use in francophone Africa
Creators: name: Fillol, Amandine
name: McSween-Cadieux, Esther
name: Ventelou, Bruno
name: Larose, Marie-Pier
name: Kanguem, Ulrich Boris Nguemdjo
name: Kadio, Kadidiatou
name: Dagenais, Christian
name: Ridde, Valéry
Publisher: name: figshare
Year: 2022
Subjects: subject: Medicine
subject: Sociology
subject: FOS: Sociology
subject: Science Policy
subject: Infectious Diseases
subject: FOS: Health sciences

description: Additional file 3: Survey.
There are no equal opportunity infectors: Epidemiological modelers must rethink our approach to inequality in infection risk
Creators: name: Zelner, Jon
name: Masters, Nina B.
name: Naraharisetti, Ramya
name: Mojola, Sanyu
name: Chowkwanyun, Merlin
Publisher: name: arXiv
Year: 2021
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: FOS: Biological sciences

description: Mathematical models have come to play a key role in global pandemic preparedness and outbreak response: helping to plan for disease burden, hospital capacity, and inform non-pharmaceutical interventions. Such models have played a pivotal role in the COVID-19 pandemic, with transmission models and, by consequence, modelers guiding global, national, and local responses to SARS-CoV-2. However, these models have systematically failed to account for the social and structural factors which lead to socioeconomic, racial, and geographic health disparities. Why do epidemiologic models of emerging infections ignore known structural drivers of disparate health outcomes? What have been the consequences of this limited framework? What should be done to develop a more holistic approach to modeling-based decision-making during pandemics? In this Perspective, we evaluate potential historical and political explanations for the exclusion of drivers of disparity in infectious disease models for emerging infections, which have often been characterized as "equal opportunity infectors" despite ample evidence to the contrary. We look to examples from other disease systems (HIV, STIs) as a potential blueprint for how social connections, environmental, and structural factors can be integrated into a coherent, rigorous, and interpretable modeling framework. We conclude by outlining principles to guide modeling of emerging infections in ways that represent the causes of inequity in infection as central rather than peripheral mechanisms.
description: 10 pages, 1 figure
M/M/C QUEUE WITH MULTIPLE WORKING VACATIONS AND SINGLE WORKING VACATION UNDER ENCOURAGED ARRIVAL WITH IMPATIENT CUSTOMERS
Creators: name: Prakati P.
name: Julia Rose Mary, K.
Publisher: name: Reliability: Theory & Applications
Year: 2024
Subjects: Multiple Working Vacations(MWV)
Single Working Vacation (SWV)
Encouraged Arrival
Impatient behaviour
Performance Measures

description: This paper demonstrates an M/M/C queuing model with Multiple working vacations and also single working vacation under encouraged arrival with impatient customers. The queuing model with the servers adopting multiple working vacation policy and single working vacation are determined separately and it is observed that the servers during working vacation(s) will be serving the customers at a slower service rate when compared during regular busy period. In addition to the above conditions, if there is a rapid increase in the customers’ arrival i.e, if encouraged arrival occurs and due to this sudden growth of the queue, there may be a impatience in the behaviour of the customer. With these considerations, an M/M/C Queuing model is analysed with two vacation policies separately by applying PGF method and thus the performance measures for an M/M/C Queue with Multiple Working Vacations and Single Working Vacation under Encouraged arrival with impatient customers are evaluated.
When populists become popular: comparing Facebook use by the right-wing movement Pegida and German political parties
Creators: name: Stier, Sebastian
name: Posch, Lisa
name: Bleier, Arnim
name: Strohmaier, Markus
Publisher: name: Taylor & Francis
Year: 2017
Subjects: subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: Ecology
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: Science Policy

description: Previous research has acknowledged the use of social media in political communication by right-wing populist parties and politicians. Less is known, however, about its pivotal role for right-wing social movements which rely on personalized messages to mobilize supporters and challenge the mainstream party system. This paper analyzes online political communication by the right-wing populist movement Pegida and German political parties. We investigate to which extent parties attract supporters of Pegida, to which extent they address topics similar to Pegida and whether their topic use has become more similar over a period of almost two years. The empirical analysis is based on Facebook posts by main accounts and individual representatives of these political groups. We first show that there are considerable overlaps in the audiences of Pegida and the new challenger in the party system, AfD. Then we use topic models to characterize topic use by party and surveyed crowdworkers to which extent they perceive the identified topics as populist communication. The results show that while Pegida and AfD talk about rather unique topics and smaller parties engage to varying degrees with the topics populists emphasize, the two governing parties CDU and SPD clearly deemphasize those. Overall, the findings indicate that the considerable attention devoted to populist actors and shifts in public opinion due to the refugee crisis have left only moderate marks in political communication within the mainstream party system.
On retract rationality for finite connected group schemes
Creators: name: Otabe, Shusuke
Publisher: name: arXiv
Year: 2024
Subjects: subject: Algebraic Geometry (math.AG)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics

description: In the present paper, we prove the retract rationality of the classifying spaces $BG$ for several types of finite connected group schemes $G$ over algebraically closed fields of positive characteristic $p>0$. In particular, we prove the retract rationality for the finite simple group schemes $G$ associated with the generalized Witt algebras in specific cases. To this end, we study the automorphism group schemes of the generalized Witt algebras and establish triangulations for them. Moreover, we extend the notion of Witt--Ree algebra to general base rings and discuss their properties.
description: Revised based on the reviewers' comments
MODELING AND ANALYSIS OF SINE POWER RAYLEIGH DISTRIBUTION : PROPERTIES AND APPLICATIONS
Creators: name: Aadil Ahmad Mir
name: S.P. Ahmad
Publisher: name: Reliability: Theory & Applications
Year: 2024
Subjects: Sine G family
Rayleigh distribution
Sine Rayleigh distribution
Reliability Analysis
Entropy
Order Statistics
Maximum Likelihood Estimation

description: In this manuscript, a new probability model named as Sine Power Rayleigh distribution (SPRD) is proposed using a Sine-G function as generator. Various statistical properties of this new distribution were investigated, including the survival function, hazard function, reverse hazard rate, cumulative hazard function, mills ratio , quantile function, moments, moment generating function, conditional moments , entropy, and order statistics. The parameters of the proposed distribution were estimated using the method of maximum likelihood estimation. To assess the model’s versatility and applicability, we conduct analyses on two real life data sets. The outcomes affirm the superior performance of the newly proposed model SPRD as compared to existing models.
Implementation of field two-way quantum synchronization of distant clocks across a 7 km deployed fiber link
Creators: name: Quan, Runai
name: Hong, Huibo
name: Xue, Wenxiang
name: Quan, Honglei
name: Zhao, Wenyu
name: Xiang, Xiao
name: Liu, Yuting
name: Cao, Mingtao
name: Liu, Tao
name: Zhang, Shougang
name: Dong, Ruifang
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The two-way quantum clock synchronization has been shown not only providing femtosecond-level synchronization capability but also security against symmetric delay attacks, thus becoming a prospective method to compare and synchronize distant clocks with both enhanced precision and security. In this letter, a field test of two-way quantum synchronization between a H-maser and a Rb clock linked by a 7 km-long deployed fiber was implemented. Limited by the frequency stability of the Rb clock, the achieved time stability at 30 s was measured as 32 ps. By applying a fiber-optic microwave frequency transfer technology, the stability was improved by more than one-magnitude to 1.9 ps, even though the number of acquired photon pairs was only 1440 in 30 s due to the low sampling rate of the utilized coincidence measurement system. Such implementation demonstrates the high practicability of two-way quantum clock synchronization method for promoting the field applications.
The Ancient Egyptian Cosmological Vignette: First Visual Evidence of the Milky Way and Trends in Coffin Depictions of the Sky Goddess Nut
Creators: name: Graur, Or
Publisher: name: arXiv
Year: 2024
Subjects: subject: History and Philosophy of Physics (physics.hist-ph)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Popular Physics (physics.pop-ph)
subject: FOS: Physical sciences

description: Here, I test the long-held assumption that the ancient Egyptian sky goddess Nut represented the Milky Way by examining Nut's visual depictions on ancient Egyptian coffins. I assemble a catalog of 555 coffin elements, including 118 cosmological vignettes from the 21st/22nd Dynasties, and report several observations. First, the cosmological vignette on the outer coffin of Nesitaudjatakhet bears a unique feature: a thick, undulating black curve that bisects Nut's star-studded body and recalls the Great Rift that cleaves the Milky Way in two. Similar undulating curves bisect the astronomical ceiling in the tomb of Seti I and appear as part of depictions of Nut in the tombs of Ramesses IV, VI, and IX. Moreover, the undulating curve resembles similar features identified as the Milky Way on the bodies of Navajo, Hopi, and Zuni spiritual beings. Hence, I argue that the undulating curve is a visual representation of the Milky Way and that it supports a previously suggested identification of the Winding Waterway as the Galaxy's Egyptian name. However, the rarity of this feature strengthens the conclusion reached by Graur (2024a): Though Nut and the Milky Way are linked, they are not synonymous. Instead of acting as a representation of Nut, the Milky Way is one more celestial phenomenon that, like the Sun and the stars, is associated with Nut in her role as the sky. Second, Nut's body is decorated with stars in only a quarter of the cosmological vignettes, suggesting that the Egyptians of the 21st/22nd Dynasties may have had a marked preference for the day sky over the night sky. Finally, I discuss the interplay between Nut's cosmological vignette and full-length portraits inside coffins from the New Kingdom to the Roman Period in the context of Nut's combined cosmological and eschatological roles as an embodiment of the coffin.
description: 28 pages, 10 figures, 3 tables. Accepted for publication by JAHH
Extreme parties and populism: an analysis of Facebook and Twitter across six countries
Creators: name: Ernst, Nicole
name: Engesser, Sven
name: Büchel, Florin
name: Blassnig, Sina
name: Esser, Frank
Publisher: name: Taylor & Francis
Year: 2017
Subjects: subject: Ecology
subject: FOS: Biological sciences
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified

description: Parties are adapting to the new digital environment in many ways; however, the precise relations between populist communication and social media are still hardly considered. This study compares populist communication strategies on Twitter and Facebook employed by a broad spectrum of left-wing, center, and right-wing political actors in six Western democracies. We conduct a semi-automated content analysis of politicians’ social media statements (N = 1400) and find that populism manifests itself in a fragmented form and is mostly used by political actors at the extremes of the political spectrum (both right-wing and left-wing), by opposition parties, and on Facebook.
Viscosity of multimodal concentrated suspensions in a Newtonian fluid
Creators: name: Roquier, G.
Publisher: name: Academic Journal of Civil Engineering
Year: 2020

description: Une nouvelle formulation théorique concernant une suspension concentrée multimodale de particules sphériques rigides non-colloïdales dans un fluide Newtonien est présentée: la viscosité relative peut être reliée à la fois à la fraction volumique des particules suspendues dans un volume total unité et à la compacité du mélange sec. Elle tient compte des interactions hydrodynamiques et des interactions géométriques entre particules. Concernant les premières, elle fait appel à une approche itérative de type changement d'échelle conformément au concept de Farris. Concernant les secondes, lorsque la fraction volumique des particules suspendues atteint sa valeur critique, la suspension devient empilement et le mélange atteint la compacité du squelette solide prédite par le Modèle d'Empilement Compressible (MEC). Celui-ci tient compte à la fois de l'effet de desserrement provoqué par les fines particules sur les grosses et de l'effet de paroi provoqué par ces dernières sur les plus petites. Nos viscosités calculées sont en bonne adéquation avec les viscosités relatives expérimentales obtenues sur des mélanges binaires avec 3 rapports de tailles différents, pour des billes de verre dans une huile de silicone.
description: Academic Journal of Civil Engineering, Vol 34 No 1 (2016): Special Issue - RUGC 2016 Liège
$λ$-Navier-Stokes turbulence
Creators: name: Alexakis, Alexandros
name: Biferale, Luca
Publisher: name: arXiv
Year: 2021
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We investigate numerically the model proposed in Sahoo et al [Phys. Rev. Lett. 118, 164501, (2017)] where a parameter $λ$ is introduced in the Navier-Stokes equations such that the weight of homochiral to heterochiral interactions is varied while preserving all original scaling symmetries and inviscid invariants. Decreasing the value of $λ$ leads to a change in the direction of the energy cascade at a critical value $λ_c \sim 0.3$. In this work, we perform numerical simulations at varying $λ$ in the forward energy cascade range and at changing the Reynolds number $\mathrm{Re}$. We show that for a fixed injection rate, as $λ\to λ_c$, the kinetic energy diverges with a scaling law $\mathcal{E} \propto (λ-λ_c)^{-2/3}$. The energy spectrum is shown to display a larger bottleneck as $λ$ is decreased. The forward heterochiral flux and the inverse homochiral flux both increase in amplitude as $λ_c$ is approached while keeping their difference fixed and equal to the injection rate. As a result, very close to $λ_c$ a stationary state is reached where the two opposite fluxes are of much higher amplitude than the mean flux and large fluctuations are observed. Furthermore, we show that intermittency as $λ_c$ is approached is reduced. The possibility of obtaining a statistical description of regular Navier-Stokes turbulence as an expansion around this newly found critical point is discussed.
NEW DISCRETE DISTRIBUTON FOR ZERO-INFLATED COUNT DATA
Creators: name: Ahmad, Peer Bilal
name: Wani, Mohammad Kafeel
Publisher: name: Reliability: Theory & Applications
Year: 2024
Subjects: Over-dispersion
Zero-inflation
Discrete distribution
Simulation
Goodness-of-fit
Testing of hypothesis

description: Over-dispersed models are commonly utilized when the variation is more than what the model actually predicts. Since one of the reasons for over-dispersion is the large number of zeros, we employ zero-inflated models instead of more traditional ones to handle this observed occurrence. We present a zero-inflated version of a discrete distribution that was developed in 2021 in our research. Significant statistical characteristics of the suggested model have been identified, such as moments, the over-dispersion feature, generating functions, and related measures, among others. We have carried the parametric estimation using the maximum likelihood estimate. Maximum likelihood estimates are checked for usefulness in a simulation exercise. We evaluated the applicability of our developed model using three real-world data sets,
Caractérisation mécanique d'un composite Bois-Polymère moulé par injection
Creators: name: Lahmar, Mohamed Ali
name: Ferrier, Emmanuel
name: Si Larbi, Amir
Publisher: name: Academic Journal of Civil Engineering
Year: 2020

description: Le but de cette étude est de développer un nouveau matériau composite à base d'une matrice polypropylène renforcée par des microfibres de bois pour un usage en isolation par l’extérieur sous forme de panneaux de bardage. Plusieurs mélanges ont été préparés avec différents taux de renfort en utilisant deux types de granulométrie de farine de bois (1 mm et 200 μm) et deux types de Polypropylène. Des essais de Traction, Flexion et de dilatation thermique ont été effectués sur chaque mélange. Nous avons constaté une augmentation de la rigidité du composite avec l'augmentation du taux de renfort en fibres de bois. On a remarqué que les mélanges à 30% de renfort en fibre de bois ont des propriétés mécaniques similaire quelle que soit la granulométrie de la farine utilisée et le type du polypropylène. Une diminution de la dilatation thermique a été observée avec l’augmentation du taux de bois. Nous avons également utilisé la technique de tomographie à rayons X pour déterminer le pourcentage volumique de vides et de fibres dans le composite. Ces données nous ont permis de comparer les différents modèles de prédiction du module d'élasticité du composite.
description: Academic Journal of Civil Engineering, Vol 34 No 1 (2016): Special Issue - RUGC 2016 Liège
NUMERICAL INVESTIGATION OF RETRIAL QUEUEING INVENTORY SYSTEM WITH A CONSTANT RETRIAL RATE, WORKING VACATION, FLUSH OUT, COLLISION AND IMPATIENT CUSTOMERS
Creators: name: G. Ayyappan
name: N. Arulmozhi
Publisher: name: Reliability: Theory & Applications
Year: 2024
Subjects: Marko vian arriv al process
PH-distribution
working vacation
collision of orbital customers
flusout

description: The retrial queueing inventory system with working vacation, flush out, balking, breakdown, and repair, as well as a constant retrial rate and orbital client collision are all examined in this study. We made the assumption that customers arrive through a Markovian arrival process and that they would get phase-type services from the server. The inventory is replenished using a (s, S) and (s, Q) strategy, and it is expected that the replenishment time will follow an exponential distribution. If there are zero inventory items, no customers in the orbit, or both, the server will go into working vacation mode. When a customer retries an orbit while the server is serving arriving customers, the orbital customer may collide with the arriving customer during that retry, in which case both of them will be shifted back into orbit; otherwise, the orbital customer may avoid colliding with the arriving customer and may rejoin the orbit for another retry. The number of customers in the orbit and the inventory level may be found in the steady state. A cost analysis is produced along with the establishment of various important performance measures. Moreover, some numerical examples are provided to clarify our mathematical notion.
Inhalation of Environmental Stressors & Chronic Inflammation: Autoimmunity and Neurodegeneration
Creators: name: Akram, Hammad
Publisher: name: figshare
Year: 2017
Subjects: Biological Techniques

description: Human life expectancy and welfare has decreased because of the increase in environmental stressors in the air. An environmental stressor is a natural or human-made component present in our environment that upon reaching an organic system produces a coordinated response. This response usually involves a modification of the metabolism and physiology of the system. Inhaled environmental stressors damage the airways and lung parenchyma, producing irritation, recruitment of inflammatory cells, and oxidative modification of biomolecules. Oxidatively modified biomolecules, their degradation products, and adducts with other biomolecules can reach the systemic circulation, and when found in higher concentrations than normal they are considered to be biomarkers of systemic oxidative stress and inflammation. We classify them as metabolic stressors because they are not inert compounds; indeed, they amplify the inflammatory response by inducing inflammation in the lung and other organs. Thus the lung is not only the target for environmental stressors, but it is also the source of a number of metabolic stressors that can induce and worsen pre-existing chronic inflammation. Metabolic stressors produced in the lung have a number of effects in tissues other than the lung, such as the brain, and they can also abrogate the mechanisms of immunotolerance. In this review, we discuss recent published evidence that suggests that inflammation in the lung is an important connection between air pollution and chronic inflammatory diseases such as autoimmunity and neurodegeneration, and we highlight the critical role of metabolic stressors produced in the lung. The understanding of this relationship between inhaled environmental pollutants and systemic inflammation will help us to: 1) understand the molecular mechanism of environment-associated diseases, and 2) find new biomarkers that will help us prevent the exposure of susceptible individuals and/or design novel therapies.
Teaching in superdiverse multicultural classrooms: Ideas from New Zealand secondary school teachers
Creators: name: Wood, Bronwyn
name: McRae, Shona
name: Raukura, Meredith
Publisher: name: Open Access Te Herenga Waka-Victoria University of Wellington
Year: 2022

description: Increased migration in recent years means that New Zealand classrooms are growing in cultural diversity—and in some communities, the extent and complexity of this has reached levels of “superdiversity”. This article reports on how teachers (n = 23) in four superdiverse secondary schools in New Zealand were responding to the growing cultural diversity in their classrooms. Four key approaches that were used by teachers in all schools to develop supportive relationships and foster greater inclusion are outlined. In addition, several teaching strategies are provided to help support teachers to face the growing complexity of mixed, hybrid, and evolving identities of multi-ethnic students in their classrooms.
Growth and characterization of high-quality single-crystalline SnTe retaining cubic symmetry down to the lowest temperature studied
Creators: name: Maiti, Ayanesh
name: Singh, Ankita
name: Iyer, Kartik K.
name: Thamizhavel, Arumugam
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: SnTe, an archetypical topological crystalline insulator, often shows a transition from a highly symmetric cubic phase to a rhombohedral structure at low temperatures. In order to achieve the highly symmetric cubic phase at low temperatures suitable for quantum behaviour, we have employed the modified Bridgman method to grow a high-quality single-crystalline sample of SnTe. Analysis of the crystal structure using Laue diffraction and rocking curve measurements show a very high degree of single crystallinity of the sample. Resistivity and the specific heat data do not show the signature of structural transition down to the lowest temperature studied. The magnetic susceptibility shows diamagnetic behaviour. All these properties manifest the behaviour of a typical bulk semiconductor with conducting surface states as expected in a topological material. Detailed powder x-ray diffraction measurements show cubic structure in the whole temperature range studied.
description: 5 pages, 4 figures
Additional file 4 of When the messenger is more important than the message: an experimental study of evidence use in francophone Africa
Creators: name: Fillol, Amandine
name: McSween-Cadieux, Esther
name: Ventelou, Bruno
name: Larose, Marie-Pier
name: Kanguem, Ulrich Boris Nguemdjo
name: Kadio, Kadidiatou
name: Dagenais, Christian
name: Ridde, Valéry
Publisher: name: figshare
Year: 2022
Subjects: subject: Medicine
subject: Sociology
subject: FOS: Sociology
subject: Science Policy
subject: Infectious Diseases
subject: FOS: Health sciences

description: Additional file 4: Description of the participants.
Immuno-spin trapping of protein and DNA radicals: “tagging” free radicals to locate and understand the redox process
Creators: name: Gomez-Mejiba, Sandra E.
name: Zili Zhai
name: Hammad Akram
name: Deterding, Leesa J.
name: Hensley, Kenneth
name: Smith, Nataliya
name: Rheal A. Towner
name: Tomer, Kenneth B.
name: Mason, Ronald P.
name: Ramirez, Dario C.
Publisher: name: figshare
Year: 2017
Subjects: subject: 110302 Clinical Chemistry (diagnostics)
subject: FOS: Clinical medicine
subject: 110399 Clinical Sciences not elsewhere classified
subject: Diseases
subject: 110799 Immunology not elsewhere classified

description: Biomolecule-centered radicals are intermediate species produced during both reversible (redox modulation) and irreversible (oxidative stress) oxidative modification of biomolecules. These oxidative processes must be studied in situ and in real time in order to understand the molecular mechanism of cell adaptation or death in response to changes in the extracellular environment. In this regard, we have developed and validated immuno-spin trapping to tag the redox process, tracing the oxidatively-generated modification of biomolecules, in situ and in real time, by detecting protein- and DNA-centered radicals. The purpose of this method article is to introduce and update the basic methods and applications of immuno-spin trapping for the study of redox biochemistry in oxidative stress and redox regulation. We describe in detail the production, detection and location of protein and DNA radicals in biochemical systems, cells, and tissues, and in the whole animal as well, by using immuno-spin trapping with the nitrone spin trap 5,5-dimethyl-1-pyrroline N-oxide (DMPO).
Detecting Subsolar-Mass Primordial Black Holes in Extreme Mass-Ratio Inspirals with LISA and Einstein Telescope
Creators: name: Barsanti, Susanna
name: De Luca, Valerio
name: Maselli, Andrea
name: Pani, Paolo
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Primordial black holes possibly formed in the early universe could provide a significant fraction of the dark matter and would be unique probes of inflation. A smoking gun for their discovery would be the detection of a subsolar mass compact object. We argue that extreme mass-ratio inspirals will be ideal to search for subsolar-mass black holes not only with LISA but also with third-generation ground-based detectors such as Cosmic Explorer and the Einstein Telescope. These sources can provide unparalleled measurements of the mass of the secondary object at subpercent level for primordial black holes as light as ${\cal O}(0.01)M_\odot$ up to luminosity distances around hundred megaparsec and few gigaparsec for LISA and Einstein Telescope, respectively, in a complementary frequency range. This would allow claiming, with very high statistical confidence, the detection of a subsolar-mass black hole, which would also provide a novel (and currently undetectable) family of sources for third-generation detectors.
description: 7 pages, 2 figures. v2: matching version to appear in PRL
Experimental violations of Leggett-Garg's inequalities on a quantum computer
Creators: name: Santini, Alessandro
name: Vitale, Vittorio
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Leggett-Garg's inequalities predict sharp bounds for some classical correlation functions that address the quantum or classical nature of real-time evolutions. We experimentally observe the violations of these bounds on single- and multi-qubit systems, in different settings, exploiting the IBM Quantum platform. In the multi-qubit case we introduce the Leggett-Garg-Bell's inequalities as an alternative to the previous ones. Measuring these correlation functions, we find quantum error mitigation to be essential to spot inequalities violations. Accessing only two qubit readouts, we assess Leggett-Garg-Bell's inequalities to emerge as the most efficient quantum coherence witnesses to be used for investigating quantum hardware, as the complexity of their calculation does not scale with the number of constituents of the system. Our analysis highlights the limits of nowadays quantum platforms, showing that the above-mentioned correlation functions deviate from theoretical prediction as the number of qubits and the depth of the circuit grow.
ON SOME PROPERTIES AND APPLICATIONS OF THE TYPE II HALF -LOGISTIC EXPONENTIATED FRECHET DISTRIBUTION
Creators: name: Olalekan Akanji Bello
name: Sani Ibrahim Doguwa
name: Abukakar Yahaya
name: Jibril, Haruna Mohammed
Publisher: name: Reliability: Theory & Applications
Year: 2024
Subjects: Type II Half-Logistic Exponentiated-G
Frechet distribution
Moments function
Reliability function
Maximum likelihood
Order Statistics

description: As the dimensions of available data for analysis continues to grow rapidly, it becomes imperative to develop new probability distributions that can more accurately represent various phenomena. In this research paper, we introduce a novel continuous probability distribution known as the Type II Half-Logistic Exponentiated Frechet Distribution, characterized by four positive parameters. This distribution expands upon the traditional Frechet distribution by introducing two additional parameters. We derive a significant density representation for this distribution. Furthermore, we delve into several statistical and mathematical properties associated with the Type II Half-Logistic Exponentiated Frechet distribution. This includes explicit expressions for key metrics such as the quantile function, probability weighted moments, moments, moments generating function, reliability function, hazard function, and order statistics. To estimate the model parameters effectively, we employ a maximum likelihood estimation technique and present the results of a simulation study. Our research underscores the superiority of this new distribution by applying it to two real-world datasets. Notably, the findings demonstrate that the Type II Half-Logistic Exponentiated Frechet distribution outperforms other considered distributions in fitting the two real datasets.
Working with each other, our families and our communities: A guideline for partnered research initiatives that support immigrant and refugee families of children who are neurodivergent
Creators: Inclusive Futures Initiative
Zulla, Rosslynn
MacLeod, Andrea A.N.
Chiu, Yvonne
Araya, Robel
Aregawi, Tsedale
Ahmed, Abdula
Biabeyin, Wubetu
Johnson, Leah
Mayer, Kim
Sana, Samina
Smith, Danielle
Syeda, Atiya
Tremblay, Rispay
Vargas, Lucero
Zhu, Julie
Publisher: name: University of Alberta Library
Year: 2024

The purpose of this guideline is to support those who are conducting research to support the needs of immigrant and refugee families with neurodivergent children. While this guide is targeted towards researchers, we recognize that there are others who also support the needs of migrant families with neurodivergent children including formal service providers and community leaders.
ON DIFFERENT CLASSICAL ESTIMATION APPROACHES FOR TYPE I HALF LOGISTIC-TOPPLEONEEXPONENTIAL DISTRIBUTION
Creators: name: Adepoju, Akeem Ajibola
name: Sauta S. Abdulkadir
name: Danjuma Jibasen
Publisher: name: Reliability: Theory & Applications
Year: 2024
Subjects: Type I Half Logistic Topp-leone Exponential distribution
maximum likelihood
Anderson_Darling
least squares and weighted least squares Methods
Cramer_von_Mises
Maximum Product of Spacing

description: This paper aims to propose six methods of parameter estimation in order to examine the behavior of the new Type I Half Logistic Topp-leone Exponential distribution. The methods taking into consideration are Maximum Likelihood, Anderson_Darling, Least Squares, Cramer_von_Mises, Maximum Product of Spacing, and Weighted Least Squares Methods. The results show that all the methods are consistent, since the estimates approach the true value of the parameters for all the methods. The bias, mean square error and mean relative estimates decay as the sample size is raised. The estimates of the six methods obtained for the model, indicated that MPS estimates is the closest to the true value of the parameters across the low, moderate and high sample sizes, invariable, the MPS produces the least biasness. Buttress more, the MPS produces the least MSE all through and remain the best estimator for low, moderate and high sample size of the model. Conclusively, MPS is the most consistent among the estimators for the model.
Decadal Mission for the New Physics Higgs/Flavor Era
Creators: name: Hou, Wei-Shu
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The LHC has not discovered any New Physics beyond the anticipated $h(125)$ boson, and new ideas abound for out-of-the-box searches, or Effective Field Theories with multi-TeV cutoff. But, have we exhausted dimension-4 operators involving sub-TeV particles that are {\it not} exotic (non-XLP)? We advocate the existence of an extra Higgs doublet that carry extra Weinberg couplings, where {\it emergent} mass-mixing hierarchies {\it and} alignment have hidden their effects very well so far. ${\cal O}(1)$ Higgs quartics can induce first order electroweak phase transition and imply sub-TeV $H, A, H^\pm$ spectrum. The extra Weinberg couplings, led by $ρ_{tt}$ and $ρ_{tc}$ at ${\cal O}(1)$, can drive electroweak baryogenesis, while $|ρ_{ee}/ρ_{tt}| \propto λ_e/λ_t$, the ratio of usual electron and top Weinberg couplings, can tame electron EDM. Finding these extra Higgs bosons via $cg \to tH/A \to tt\bar c$, $tt\bar t$ and $cg \to bH^+ \to bt\bar b$ processes (and those allowed by Higgs boson splittings) at the LHC, and pushing the flavor frontier to break the flavor code, would usher in a new Higgs/flavor era. A new scale at 10--20 TeV, possibly related to the Landau pole of the scalar sector, may emerge.
description: 18 pages, 9 figures, invited review to be submitted to Chinese Journal of Physics
ON THE CHARACTERIZATION AND APPLICATIONS OF A THREE-PARAMETER IMPROVED WEIBULL-WEIBULL DISTRIBUTION
Creators: name: A.S. Mohammed
name: B. Abba
name: I. Abdullahi
name: Y. Zakari
name: A.I. Ishaq
Publisher: name: Reliability: Theory & Applications
Year: 2024
Subjects: Impr oved Weibull-Weibull distribution
non-monotone failure rate
characterization
maximum likelihood method
failure time data

description: Parametric modeling of complex lifetime data characterized with non-monotone hazard rate (NMHR) has in recent years attract the interest of many researchers and practitioners. The three-parameter improved Weibull-Weibull distribution introduced in 2022 has demonstrated a better NMHR modeling potential in the analysis of several failure times identified with bathtub hazard rate (BHR). In this study, we present the characterization, properties and two data sets’ applications of the distribution. Various properties of the distribution obtained, include moment generating function, moments, skewness, kurtosis, and some types of entropy. Numerical results for mean, variance, skewness, and kurtosis are computed using simulation studies. Estimation of the distribution parameters is performed using the method of maximum likelihood, and the estimation method is assessed by Monte Carlo simulation experiments. The two illustrations further ascertain the capability of the model for modeling lifetime data from different scientific investigation areas.
ON THE Q-RAYLEIGH DISTRIBUTION AND ITS APPLICATIONS
Creators: name: Sadok, Ibrahim
Publisher: name: Reliability: Theory & Applications
Year: 2024
Subjects: q-Rayleigh distribution
Statistical properties
Parameter estimation
Modelling data

description: This paper introduces the two-parameter q-Rayleigh distribution, a powerful extension of the classical Rayleigh model for analysing real-world data. Compared to the Rayleigh, the q-Rayleigh incorporates a novel pathway parameter q, offering greater flexibility in capturing diverse data patterns. We delve into the mathematical properties of the q-Rayleigh, including its hazard rate function and quantile function, and explore parameter estimation through maximum likelihood methods. We demonstrate its superior fit compared to the widely-used Rayleigh distribution for real-world data. Moreover, we explore its application in reliability analysis. This comprehensive study makes the q-Rayleigh a compelling choice for modelling data exhibiting gradual transitions and enhanced flexibility.