cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Reconstruction of Domain Wall Universe and Localization of Gravity
Creators: name: Higuchi, Masafumi
name: Nojiri, Shin'ichi
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We construct a four-dimensional domain wall universe by using the Brans-Dicke type gravity with two scalar field. We give a formulation where for arbitrarily given warp factor and scale factor, we construct an action which reproduces both of the warp and scale factors as a solution of the Einstein equation and the field equations given by the action. This formulation could be called as reconstruction. We show that the model does not contain ghost with negative kinetic term and there occur the localization of gravity as in the Randall-Sundrum model. It should be noted that in the equation of the graviton, there appear extra terms related with the extra dimension, which might affect the tensor mode in the fluctuations
description: LaTeX, 8 pages, no figure
Kinematic study of the parsec-scale jet of the quasar PKS 1741--03
Creators: name: Caproni, Anderson
name: Melo, Iara Tosta e
name: Abraham, Zulema
name: Monteiro, Hektor
name: Roland, Jacques
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present 23 interferometric images of parsec-scale jet of the quasar PKS 1741--03 at 15, 24 and 43 GHz spanning about 13 yr. We model the images as a superposition of discrete two--dimensional elliptical Gaussian components, with parameters determined by the cross--entropy technique. All the images present a spatially unresolved component (core) and usually two or three components receding from it. The same components were found in simultaneous 24 and 43 GHz maps, showing the robustness of our model-fitting. The core-shift opacity effect between these frequencies is weak. We have identified seven components moving along straight lines at constant apparent superluminal speeds ($3.5\leβ_\mathrm{obs}\le 6.1$), with different sky position angles ($-186°\le η\le -125°$). The core flux density tracks quite well the fluctuations seen in the historical single-dish light curve at 14.5 GHz, with no measurable delay. The total flux density from the moving jet components is delayed $\sim$2 yr in relation to the core light curve, roughly the same as the lag between the ejection epoch and the maximum flux density in the light curves of the jet components. We propose that there are three non-exclusive mechanisms for producing these delays. From the kinematics of the most robust jet components and the core brightness temperature, we determined the bulk Lorentz factor ($4.8\leγ\le 24.5$) and the jet viewing angle ($0.°35 \le θ\le 4.°2$); these values agree with previous estimates from the spectral energy distribution of PKS 1741--03 and its radio variability.
description: 18 pages, 10 figures, 5 tables. Accepted for publication in Monthly Notices of the Royal Astronomical Society
Additional file 1 of Correlated cryo-SEM and CryoNanoSIMS imaging of biological tissue
Creators: name: Meibom, Anders
name: Plane, Florent
name: Cheng, Tian
name: Grandjean, Gilles
name: Haldimann, Olivier
name: Escrig, Stephane
name: Jensen, Louise
name: Daraspe, Jean
name: Mucciolo, Antonio
name: De Bellis, Damien
name: Rädecker, Nils
name: Martin-Olmos, Cristina
name: Genoud, Christel
name: Comment, Arnaud
Publisher: name: figshare
Year: 2023
Subjects: subject: Biophysics
subject: Biochemistry
subject: Space Science
subject: Medicine
subject: Neuroscience
subject: Physiology
subject: FOS: Biological sciences
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Inorganic Chemistry

description: Additional file 1: Fig. S1. 3D renderings comparing conventional and CryoNanoSIMS transfer systems. Fig. S2. Cooling curve for the CryoNanoSIMS. Fig. S3. Schematic drawing illustrating ultramicrotome cryo-planing. Fig. S4. CryoNanoSIMS analysis of carbon isotope ratios in Green Hydra. Fig. S5. CryoNanoSIMS analysis of nitrogen isotope ratios in Green Hydra. Fig. S6. SEM images of sample surfaces before and afterNanoSIMS imaging.
Hunting Quasi-Degenerate Higgsinos
Creators: name: Han, Zhenyu
name: Kribs, Graham D.
name: Martin, Adam
name: Menon, Arjun
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We present a new strategy to uncover light, quasi-degenerate Higgsinos, a likely ingredient in a natural supersymmetric model. Our strategy focuses on Higgsinos with inter-state splittings of O(5-50) GeV that are produced in association with a hard, initial state jet and decay via off-shell gauge bosons to two or more leptons and missing energy, $pp \to j + \text{MET}\, + 2^+\, \ell$. The additional jet is used for triggering, allowing us to significantly loosen the lepton requirements and gain sensitivity to small inter-Higgsino splittings. Focusing on the two-lepton signal, we find the seemingly large backgrounds from diboson plus jet, $\bar tt$ and $Z/γ^* + j$ can be reduced with careful cuts, and that fake backgrounds appear minor. For Higgsino masses $m_χ$ just above the current LEP II bound ($μ\simeq 110\,$) GeV we find the significance can be as high as 3 sigma at the LHC using the existing 20 fb$^{-1}$ of 8 TeV data. Extrapolating to LHC at 14 TeV with 100 fb$^{-1}$ data, and as one example $M_1 = M_2 = 500$ GeV, we find 5 sigma evidence for $m_χ \lesssim\, 140\,$ GeV and 2 sigma evidence for $m_χ \lesssim\, 200\,$ GeV . We also present a reinterpretation of ATLAS/CMS monojet bounds in terms of degenerate Higgsino ($δm_χ \ll 5\,$) GeV plus jet production. We find the current monojet bounds on $m_χ$ are no better than the chargino bounds from LEP II.
description: 25 pages, 12 figures, 3 tables
RAISE Community
Creators: name: Petsani, Despoina
name: Bolieraki, Eleni
name: Konstantinidis, Evdokimos
name: Epelde, Gorka
name: Trochidis, Ilias
name: Kanellopoulos, Pantelis
name: Bamidis, Panagiotis
Publisher: name: Zenodo
Year: 2023
Subjects: EOSC

description: RAISE is focused on building a community of stakeholders and cultivating new synergies and research opportunities. The community will be constantly testing, and evaluating RAISE system to provide valuable feedback and ideas for improvement. The feedback will include quantitative data on system usage, such as the time spent uploading data/code and deploying it, as well as observations from usability testing while users interact with the system. OpenAIRE and ATHENA support community engagement and have strong collaboration with EOSC network. The community will engage in online and physical meetings, including learning workshops, social networking events, and datathons that offer stakeholders the opportunity to spread the word about RAISE and win prizes based on their contribution of datasets. To further support the RAISE community, new partnerships and incentives will be created, such as participation in new publications, collaborations, and knowledge sharing for new data science methods. The project partners' networks include research institutes, experts, consultancies, policymakers at European, national, and international levels, international organizations, and civil society. These networks enable project partners to maintain regular communication with the project's direct beneficiaries and stakeholders, ensuring that the project's target groups are effectively engaged. To join the RAISE community, please visit: https://raise-science.eu.
In search for more ‘authentic’ EU attitudes: re-evaluating regionalist parties’ EU positioning from sub-state parliamentary debates
Creators: name: Strnad, Michal
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Medicine
subject: Cancer
subject: Science Policy
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Computational Biology

description: This paper responds to the tendency of past scholarship to reduce European Union (EU) attitudes of regionalist parties to one general position. It undertakes a comprehensive analysis of regionalist parties’ EU attitudes from sub-state parliamentary debates. Drawing on three different cases from three territorial contexts – Plaid Cymru, Femu a Corsica and Süd-Tiroler Freiheit, it systematically captures the content and nature of regionalist parties’ EU positioning from EU-related interventions in regional parliaments over a recent five-year period (2016–21). The paper finds that regionalist parties simultaneously adopt a distinct position on multiple EU-related issues (with varying salience and clarity). Importantly, each party constructs its EU attitudes around diametrically different issues, closely intertwined with its regional empowerment strategy and reflecting the unique regional context. Moreover, each party displays contradictory tendencies in its EU support, adopting Europhile positions on some issues, while Eurosceptic on others. This contribution is significant in two ways. First, the thematic variability identified within and across the cases provides an original insight into the full scope and scale of regionalist parties’ engagement with the EU at a given moment. Second, this in-depth qualitative analysis based on novel data advances past methodologies while challenging their conclusiveness about the regionalist parties’ actual EU support.
Evolution of the Fraction of Clumpy Galaxies at 0.2
Creators: name: Murata, K. L.
name: Kajisawa, M.
name: Taniguchi, Y.
name: Kobayashi, M. A. R.
name: Shioya, Y.
name: Capak, P.
name: Ilbert, O.
name: Koekemoer, A. M.
name: Salvato, M.
name: Scoville, N. Z.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Using the Hubble Space Telescope/Advanced Camera for Surveys data in the COSMOS field, we systematically searched clumpy galaxies at 0.2 10^9.5 Msun decreases with time from ~0.35 at 0.8 10^10.5 Msun at each redshift. On the other hand, the fraction of clumpy galaxies increases with increasing both SFR and SSFR in all the redshift ranges we investigated. In particular, we found that the SSFR dependences of the fractions are similar among galaxies with different stellar masses, and the fraction at a given SSFR does not depend on the stellar mass in each redshift bin. The evolution of the fraction of clumpy galaxies from z~0.9 to z~0.3 seems to be explained by such SSFR dependence of the fraction and the evolution of SSFRs of star-forming galaxies. The fraction at a given SSFR also appears to decrease with time, but this can be due to the effect of the morphological K-correction. We suggest that these results are understood by the gravitational fragmentation model for the formation of giant clumps in disk galaxies, where the gas mass fraction is a crucial parameter.
description: 14 Pages, 13 Figures, 1 Table, Accepted for publication in ApJ
The Ups and Downs of Robotic Arms: Navigating the Challenges
Creators: name: Isa A.I.
name: Muhammad A. B
Publisher: name: gjrpublication
Year: 2024

description: The study explores the impact of Cabot's robotic systems on modern industrial operations, highlighting their precision and user-friendliness. Electronic technology has advanced with recent technological advancements, and the ultimate goal of these technological advancements is to create robotic systems that are as human-like as feasible. Thanks to the blessing of technical advancements, Cabot’s will be able to do duties significantly more effectively than humans in difficult or urgent conditions where people are unable to do them. Several studies have been evaluated in this study, and we have seen the effects and difficulties of employing Cabot's over humans as well as the difficulties it encountered.
Markov Chain Monte Carlo Algorithms for Lattice Gaussian Sampling
Creators: name: Wang, Zheng
name: Ling, Cong
name: Hanrot, Guillaume
Publisher: name: arXiv
Year: 2014
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: Sampling from a lattice Gaussian distribution is emerging as an important problem in various areas such as coding and cryptography. The default sampling algorithm --- Klein's algorithm yields a distribution close to the lattice Gaussian only if the standard deviation is sufficiently large. In this paper, we propose the Markov chain Monte Carlo (MCMC) method for lattice Gaussian sampling when this condition is not satisfied. In particular, we present a sampling algorithm based on Gibbs sampling, which converges to the target lattice Gaussian distribution for any value of the standard deviation. To improve the convergence rate, a more efficient algorithm referred to as Gibbs-Klein sampling is proposed, which samples block by block using Klein's algorithm. We show that Gibbs-Klein sampling yields a distribution close to the target lattice Gaussian, under a less stringent condition than that of the original Klein algorithm.
description: 5 pages, 1 figure, IEEE International Symposium on Information Theory(ISIT) 2014
title: Direct Evaluation of Parton Distribution Functions of the Nucleon from Lattice QCD
Creators: name: Scapellato, Aurora
Publisher: name: Bergische Universität Wuppertal
Year: 2019

description: We describe the computation of parton distribution functions (PDFs) of the nucleon from first principles. The investigation is done within the lattice formulation of Quantum Chromodynamics (QCD). The numerical calculations are performed employing a twisted mass ensemble of gauge field configurations simulated with two degenerate light quarks with mass fixed to their physical value. By using the quasi-PDF approach we extract the isovector unpolarized, helicity and transversity distributions. Within this approach, we compute quasi-distributions which are related to the physical PDFs using the framework of Large Momentum Effective Theory. As the nucleon boost increases, we observe that the renormalized lattice PDFs move towards the quark distributions extracted from global QCD analyses. The results at larger momentum boost reproduce the main features of the phenomenological fits to inclusive and semi-inclusive scattering data. We discuss future issues that need to be addressed to eliminate systematic uncertainties related to the lattice calculation. The results obtained clearly demonstrate the potential impact of non-perturbative methods in the determination of PDFs and open a most promising path to investigate quantities that require the evaluation of non-local operators on the lattice.
description: Wir beschreiben die ab-initio Berechnung von Parton Verteilungsfunktionen (PDFs) des Nukleons. Die Untersuchung wird innerhalb der Gitterformulierung der Quanten-Chromodynamik (QCD) durchgeführt. Die numerischen Berechnungen werden unter Verwendung von Ensemblen von Eichfeldkonfigurationen durchgeführt, die einen chiral verdrehten Massenterm benutzen, wobei die leichten Quarks massen-degeneriert und auf ihren physikalischen Wert fixiert sind. Mit Hilfe des Quasi-PDF-Ansatzes extrahieren wir die Isovektor-unpolarisierten Helizität und Transversalverteilungen. Innerhalb dieses Ansatzes berechnen wir zunächst Quasi-Verteilungen und verknüpfen diese mit den physikalischen PDFs im Rahmen der effektiven Theorie großer Impulse. Wir finden, dass sich die renormierten Gitter-PDFs mit zunehmenden Nukleon-Boost den Quark-Verteilungen annähern, wie sie aus globalen QCD-Analysen extrahiert werden. Insbesondere reproduzieren die Ergebnisse bei größerem Boost die Hauptmerkmale der phänomenologischen Fits an inklusive und semi-inklusive Streudaten. Wir sprechen zukünftige Probleme an, die angegangen werden müssen, um systematische Unsicherheiten im Zusammenhang mit der Gitterberechnung zu kontrollieren. Die erzielten Ergebnisse verdeutlichen klar die potenzielle Anwendung von nicht-störungstheoretischen Methoden bei der Bestimmung von PDFs und eröffnen einen vielversprechenden Weg zur Untersuchung von Größen, die die Berechnung von nicht-lokalen Operatoren auf dem Gitter erfordern.
Structural patterns in complex systems using multidendrograms
Creators: name: Gomez, Sergio
name: Fernandez, Alberto
name: Granell, Clara
name: Arenas, Alex
Publisher: name: arXiv
Year: 2014
Subjects: subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: Information Retrieval (cs.IR)
subject: Social and Information Networks (cs.SI)
subject: Computational Physics (physics.comp-ph)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Complex systems are usually represented as an intricate set of relations between their components forming a complex graph or network. The understanding of their functioning and emergent properties are strongly related to their structural properties. The finding of structural patterns is of utmost importance to reduce the problem of understanding the structure-function relationships. Here we propose the analysis of similarity measures between nodes using hierarchical clustering methods. The discrete nature of the networks usually leads to a small set of different similarity values, making standard hierarchical clustering algorithms ambiguous. We propose the use of "multidendrograms", an algorithm that computes agglomerative hierarchical clusterings implementing a variable-group technique that solves the non-uniqueness problem found in the standard pair-group algorithm. This problem arises when there are more than two clusters separated by the same maximum similarity (or minimum distance) during the agglomerative process. Forcing binary trees in this case means breaking ties in some way, thus giving rise to different output clusterings depending on the criterion used. Multidendrograms solves this problem grouping more than two clusters at the same time when ties occur.
Electronic Supplementary Text and Figures;Dataset S1;Dataset S2 from Extinction of herbivorous dinosaurs linked to Early Jurassic global warming event
Creators: name: Pol, D.
name: J. Ramezani
name: K. Gomez
name: Carballido, J. L.
name: A. Paulina Carabajal
name: O. W. M. Rauhut
name: I. H. Escapa
name: N. R. Cúneo
Publisher: name: The Royal Society
Year: 2020
Subjects: subject: 40308 Palaeontology (incl. Palynology)
subject: FOS: Earth and related environmental sciences

description: Data supporting the anatomical and phylogenetic study and Data supporting the U-Pb radioisotopic dates presented in this paper.;Phylogenetic data matrix (plain text file, formatted for TNT);U-Pb data in spreadsheet (Excel file)
title: Εκτίμηση της ποιότητας των υπογείων υδάτων στις εντατικά καλλιεργήσιμες περιοχές του Κορινθιακού κόλπο

title: Assessment of groundwater quality in the intensively cultivated areas of the Gulf of Corinth
Creators: name: Βατικιωτης Ιωαννης
Publisher: name: Technical University of Crete
Year: 2022

description: Στην παρούσα διπλωματική εργασία επιχειρείται μια προσπάθεια διερεύνησης της ρύπανσης που παρατηρείται από νιτρικά του υδροφόρου ορίζοντα, στο βόρειο-ανατολικό τμήμα του νομού Κορινθίας. Για το σκοπό αυτό χρησιμοποιήθηκε ένα Γεωγραφικό Σύστημα Πληροφοριών (GIS), και πιο συγκεκριμένα οι μέθοδοι Kriging και Inverse Distance Weighting (IDW). Διάφοροι τοπογραφικοί χάρτες χρησιμοποιήθηκαν στο Γεωγραφικό Σύστημα ως πληροφορίες, οι οποίοι ψηφιοποιήθηκαν προκειμένου να αποτυπωθεί όσο το δυνατόν καλύτερα το μορφολογικό υπόβαθρο της περιοχής. Στη περιοχή μελέτης, παρατηρήθηκε αυξημένη δραστηριότητα σε αγροτικές καλλιέργειες, οι οποίες αναμένονται να επιβαρύνουν τον υδροφόρο ορίζοντα, λόγω, αφενός της χρήσης λιπασμάτων και φυτοφαρμάκων και αφετέρου άλλων καλλιεργητικών πρακτικών που προκαλούν ρύπανση που καταλήγει στον υδροφόρο ορίζοντα. Αυξημένη συγκέντρωση σε νιτρικά ιόντα, παρατηρείται στις περιοχές οι οποίες παρουσιάζουν έντονη αγροτική δραστηριότητα.
Η παρούσα μελέτη κατέληξε στο συμπέρασμα πως ο λόγος που η οικιστική ανάπτυξη της περιοχής επιβαρύνει την ρύπανση του υδροφόρου ορίζοντα, οφείλεται στην μη ύπαρξη κεντρικού αποχετευτικούς συστήματος. Αυτό αφορά το βόρειο-ανατολικό τμήμα του νομού Κορινθίας. Το Γεωγραφικό Σύστημα Πληροφοριών αποτέλεσε βασικό εργαλείο προκειμένου να εξακριβωθούν οι καλύτερες μέθοδοι για την διαχείριση των υδάτινων πόρων.
description: The present work attempts to study the contamination of aquifers in the northeastern part of the Corinth region. For this purpose, a Geographic Information System (GIS) was used, specifically the Kriging and Inverse Distance Weighting (IDW) methods. Different topographic digitized maps were used as information in the Geographic System. Increased activity in agricultural crops was observed in the study area, which is expected to aggravate aquifers due to the use of fertilizers and pesticides and other polluting cultivation practices.
This study concludes that the reason for aquifer pollution from residential development in the area is the lack of a central drainage system. This affects the northeastern part of the prefecture of Corinth. The Geographic Information System has been an important tool in determining the best methods for water resources management.
Simulation work on Fractional Order PIλ Control Strategy for speed control of DC motor based on stability boundary locus method
Creators: name: Praboo, N. N.
name: Bhaba, P. K.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: This paper deals with the design of Fractional Order Proportional Integral (FO-PIλ) controller for the speed control of DC motor. A mathematical model of DC motor control system is derived and based on this model fractional order PIλ controller is designed using stability boundary locus method to satisfy required gain margin (GM) and phase margin (PM) of the system. Servo and Regulatory tracking simulation runs are carried out for the speed control of DC motor. The performance of the fractional order PIλ (FO-PIλ) controller is compared with Integer Order Relay Feedback Proportional Integral (IO-RFPI) controller. Finally the stability of both control system is considered.
description: 7 pages, 13 figures, Published with International Journal of Engineering Trends and Technology (IJETT)
Single spin stochastic optical reconstruction microscopy
Creators: name: Pfender, Matthias
name: Aslam, Nabeel
name: Waldherr, Gerald
name: Wrachtrup, Jörg
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We experimentally demonstrate precision addressing of single quantum emitters by combined optical microscopy and spin resonance techniques. To this end we utilize nitrogen-vacancy (NV) color centers in diamond confined within a few ten nanometers as individually resolvable quantum systems. By developing a stochastic optical reconstruction microscopy (STORM) technique for NV centers we are able to simultaneously perform sub diffraction-limit imaging and optically detected spin resonance (ODMR) measurements on NV spins. This allows the assignment of spin resonance spectra to individual NV center locations with nanometer scale resolution and thus further improves spatial discrimination. For example, we resolved formerly indistinguishable emitters by their spectra. Furthermore, ODMR spectra contain metrology information allowing for sub diffraction-limit sensing of, for instance, magnetic or electric fields with inherently parallel data acquisition. As an example, we have detected nuclear spins with nanometer scale precision. Finally, we give prospects of how this technique can evolve into a fully parallel quantum sensor for nanometer resolution imaging of delocalized quantum correlations.
description: 9 pages, 4 figures
Time evolution of electron flow in a model diode: Non-perturbative analysis
Creators: name: Rokhlenko, A.
name: Lebowitz, J. L.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Using a combination of Eulerian and Lagrangian variables we obtain some exact results and good approximation schemes for the time evolution of the electron flow from a no-current state to a final stationary current state in a planar one-dimensional diode. The electrons can be injected externally or generated by the cathode via field emission governed by a current-field law. The case of equipotential electrodes and fixed injection is studied along with a positive anode potential. When the current is fixed externally the approach to the stationary state goes without oscillations if the initial electron velocity is high enough and the anode can absorb the injected flow. Otherwise the accumulated space charge creates a potential barrier which reflects the flow and leads to its oscillations, but our method of analysis is invalid in such conditions. In the field emission case the flow goes to its stationary state through a train of decaying oscillations whose period is of the order of the electron transit time, in agreement with earlier studies based on perturbation techniques. Our approximate method does not permit very high cathode emissivity, though the method works when the stationary current density is only about 10% smaller than the Child-Langmuir limit.
Variability of M giant stars based on em Kepler photometry: general characteristics
Creators: name: Bányai, E.
name: Kiss, L. L.
name: WG12, members of KASC
Publisher: name: arXiv
Year: 2014
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Small amounts of pre-solar grains have survived in the matrices of primitive meteorites and interplanetary dust particles. Their detailed study in the laboratory with modern analytical tools provides highly accurate and detailed information with regard to stellar nucleosynthesis and evolution, grain formation in stellar atmospheres, and Galactic Chemical Evolution. Their survival puts constraints on conditions they were exposed to in the interstellar medium and in the Early Solar System.
description: 3 pages, 1 figures, conference proceeding
A low-cost and open-source measurement system to determine the Young's and shear moduli of soft materials using a Raspberry Pi camera module and 3D printed parts
Creators: name: Sands, Matthew
name: Kim, Jinki
Publisher: name: Zenodo
Year: 2022

description: Advances in biomedical and engineering fields have greatly increased the need for understanding of soft structures. Soft materials such as gelatin and gelatin-based hydrogels have grown in popularity for use in a wide variety of applications including tissue engineering, biofabrication, and organ transplantation. With hydrogel structures being used in such demanding applications, it is crucial to properly characterize the dynamic behavior of these soft structures. Although there have been major improvements in measurement technology for determining the mechanical properties of soft, translucent materials, it remains quite challenging to reliably measure the Young’s and shear moduli of these materials in a way that remains straightforward, low-cost, and non-contact. This research aims to address the weaknesses in modern measurement methods and develop a system suitable for characterizing the elastic moduli of soft materials that requires only four, inexpensive, off-the-shelf components. Utilizing a Raspberry Pi, stepping motor, and an inexpensive camera, the Young’s and shear moduli of a gelatin column is measured five times. The standard deviation between measurement was observed to be less than 0.15% with high accuracy having an error of less than 4.6% when compared to relatively expensive, conventional measurement techniques.
Model-based Sketching and Recovery with Expanders
Creators: name: Bah, Bubacarr
name: Baldassarre, Luca
name: Cevher, Volkan
Publisher: name: arXiv
Year: 2014
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: G.1.0; G.1.2
subject: 15B52, 65F50, 68Q25

description: Linear sketching and recovery of sparse vectors with randomly constructed sparse matrices has numerous applications in several areas, including compressive sensing, data stream computing, graph sketching, and combinatorial group testing. This paper considers the same problem with the added twist that the sparse coefficients of the unknown vector exhibit further correlations as determined by a known sparsity model. We prove that exploiting model-based sparsity in recovery provably reduces the sketch size without sacrificing recovery quality. In this context, we present the model-expander iterative hard thresholding algorithm for recovering model sparse signals from linear sketches obtained via sparse adjacency matrices of expander graphs with rigorous performance guarantees. The main computational cost of our algorithm depends on the difficulty of projecting onto the model-sparse set. For the tree and group-based sparsity models we describe in this paper, such projections can be obtained in linear time. Finally, we provide numerical experiments to illustrate the theoretical results in action.
description: 21 pages, 3 figures, preliminary version accepted to SODA 2014
title: Analysis of framed structures under fire loading
Creators: name: Pirzadeh, Davoud
Publisher: name: Bergische Universität Wuppertal
Year: 2019

description: Fire is categorized under accidental loads in Eurocodes. Accidental fire loads are almost unpredictable loads that depend on time, the fire compartment, live loads, and the type of such loads. In case of complicated structural systems, some aspects—such as the buckling of columns, the effects of elevated temperatures on global structure, the redistribution of loads and internal forces, and the unloading process—can be investigated only by applying advanced calculation methods based on the Eurocode classification, which apply the coupled finite element fields to analyse the structure. The solution process of complicated systems can be time-consuming, costly, and—sometimes—impossible. The abovementioned methods are complicated and time-consuming for modelling the accidental fire loading process as different scenarios in combination with other loads. The motivation of this research study is to simplify the modelling of the fire loading processes. By combining the simulation procedure of Levels 2 and 3, based on Eurocode, a FEM model of analysis for mathematizing the fire loading process is developed. Based on the results of the two-dimensional thermal FEM equation, the developed method obtains the reduced time-dependent stiffness (integrated over the cross-section area) of warm members as a function of time. The variable stiffness of warm members will be applied to mathematize the global structural behaviour for calculating the distribution of internal forces, considering geometrical nonlinearity. The developed method is able to apply different fire scenarios and combine them with other service loads to obtain global structural behaviour and distribution of internal forces. To achieve this, a FEM code has been developed in Microsoft Visual C# (C sharp), and the results are verified with those of the ANSYS Workbench software. To investigate the fire resistance of steel structures, the method that has been developed will give convincing results at lower temperatures. The developed method considers a cold analysis under an assumption of variable stiffness for the warm members and, so, is suitable to just determine an estimation. The developed method attempts to decrease the cost of analysis and give a rough estimation of the structural response. The results of the developed method can be trusted to obtain an estimation of the global behaviour of structure. The results depend directly on stiffness curves. The simplified method that has been developed is not suitable to determine exact and accurate structural behaviour. Material nonlinearity, crashes in concrete members, 3D thermal stresses and strains in cross-sections, buckling, and shear deformations are some of the parameters not considered by the method that has been developed.
QuantumPascal D2 Report evaluating the performance of the different types of FP-based refractometers developed with respect to their precision, accuracy, working range and target relative uncertainties of 500 ppm in the range 1 Pa – 1 kPa and 10 ppm in the range 1 kPa – 100 kPa
Creators: name: Zelan, Martin
name: Axner, Ove
name: Forssén, Clayton
name: Silander, Isak
name: Zakrisson, Johan
name: Rezki, Amazigh
name: Wallerand, Jean- Pierre
name: Kussicke, André
name: Rubin, Tom
name: Garcia-Izquierdo, Carmen
name: González, Sergio Moltó
Publisher: name: Zenodo
Year: 2022
Subjects: QuantumPascal
Performance
Precision
Accuracy
Working range
Pressure
Vacuum
Metrology

description: This report summarize performance of the Fabry-Perot refractometers developed in work package 1 in the 18SIB04 QuantumPascal project. The report first briefly introduces the concept of performance in terms of precision, accuracy, and working range. Thereafter each of the systems that have been developed by the partners is shortly described and their contribution to the overall performance in terms of uncertainty is highlighted. From the combined results of the systems, it can be concluded that the target uncertainties have been reached.
description: Acknowledgement: This project '18SIB04 QuantumPascal' has received funding from the EMPIR programme co-financed by the Participating States and from the European Union's Horizon 2020 research and innovation programme. More information can be found on the website: https://www.ptb.de/empir2019/quantumpascal/
Table S1: Probe Questions and Corresponding Response Options from Comparing the phenomenological qualities of stimulus-independent thought, stimulus-dependent thought and dreams using experience sampling
Creators: name: Gross, M. E.
name: A. P. Smith
name: Y. M. Graveline
name: R. E. Beaty
name: J. W. Schooler
name: Seli, P.
Publisher: name: The Royal Society
Year: 2020
Subjects: subject: 170299 Cognitive Science not elsewhere classified
subject: FOS: Psychology

description: Humans spend a considerable portion of their lives engaged in ‘stimulus-independent thoughts' (SIT), or mental activity that occurs independently of input from the immediate external environment. Although such SITs are, by definition, different from thoughts that are driven by stimuli in one's external environment (i.e. stimulus-dependent thoughts; SDTs), at times, the phenomenology of these two types of thought appears to be deceptively similar. But how similar are they? We address this question by comparing the content of two types of SIT (dreaming and waking SITs) with the content of SDTs. In this 7 day, smartphone-based experience-sampling procedure, participants were intermittently probed during the day and night to indicate whether their current thoughts were stimulus dependent or stimulus independent. They then responded to content-based items indexing the qualitative aspects of their experience (e.g. My thoughts were jumping from topic to topic). Results indicate substantial distinctiveness between these three types of thought: significant differences between at least two of the three traits were found across every measured variable. Implications are discussed.This article is part of the theme issue ‘Offline perception: voluntary and spontaneous perceptual experiences without matching external stimulation’.
Ermakov-Lewis symmetry in photonic lattices
Creators: name: Lara, B. M. Rodríguez
name: Aleahmad, P.
name: Moya-Cessa, H. M.
name: Christodoulides, D. N.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Optics (physics.optics)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present a class of waveguide arrays that is the classical analog of a quantum harmonic oscillator where the mass and frequency depend on the propagation distance. In these photonic lattices refractive indices and second neighbor couplings define the mass and frequency of the analog quantum oscillator, while first neighbor couplings are a free parameter to adjust the model. The quantum model conserves the Ermakov-Lewis invariant, thus the photonic crystal also posses this symmetry.
description: 8 pages, 3 figures
The impact of COVID-19 pandemic on dietary habits of children and adolescents
Creators: name: Μπεροπούλη, Σταυρούλα Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2023
Subjects: Πανδημία COVID-19
Διατροφή, διατροφικές συνήθειες
Παιδιά, έφηβοι
COVID-19 pandemic
Diet, dietary habits, nutrition
Children, adolescents

description: The ongoing coronavirus disease 2019 (COVID-19) pandemic has affected several aspects of our life. This current before and after cross-sectional study aims to investigate its effect on the dietary habits and Body Mass Index (BMI) of children and adolescents aged between 5 and 16 years in Northern Greece. The study was conducted in two stages, the first from February to March 2020 and the second between April and May 2022. Questionnaires were distributed to randomly selected elementary, and junior high schools, and a total of 165 participants were enrolled. Participants reported their sociodemographic and anthropometric data and dietary habits using the Mediterranean Quality Index (KIDMED) and a Food Frequency Questionnaire (FFQ). There was no significant difference in BMI and adherence to Mediterranean Diet before and during the COVID-19 pandemic. In regards to dietary habits, an increase in the consumption of legumes, poultry, olive oil, and salty snacks was reported (p-value < 0.05), and a decrease in the consumption of dairy products (p-value <0.05). Our study contributes to a better understanding of the multifaceted aspects of the pandemic and its impact on the lifestyle. More extensive studies are needed to investigate all the effects in order to draw safer conclusions.
description: Η πανδημία COVID-19 έχει επηρεάσει πολλούς τομείς της ζωής μας. Αυτή η συγχρονική μελέτη έχει ως σκοπό να εξετάσει την επίδραση της στις διατροφικές συνήθειες καθώς και στο Δείκτη Μάζας Σώματος (ΔΜΣ) παιδιών κι εφήβων ηλικίας 5 έως 16 ετών στη Βόρεια Ελλάδα. Η μελέτη πραγματοποιήθηκε σε δύο φάσεις, η πρώτη μεταξύ Φεβρουαρίου και Μαρτίου 2020 και η δεύτερη μεταξύ Απριλίου και Μαΐου 2022. Ερωτηματολόγια διαμοιράστηκαν σε τυχαία επιλεγμένα δημοτικά σχολεία και γυμνάσια. Συνολικά συμμετείχαν 165 άτομα. Οι συμμετέχοντες κατέγραψαν τα δημογραφικά και ανθρωπομετρικά τους στοιχεία και τις διατροφικές συνήθειες με τη συμπλήρωση του Mediterranean Quality Index (KIDMED) και ενός ερωτηματολογίου συχνότητας κατανάλωσης τροφίμων. Δεν υπήρξε στατιστικά σημαντική διαφορά στο ΔΜΣ και στο KIDMED score πριν και μετά την πανδημία. Αναφορικά με τις διατροφικές συνήθειες , παρατηρήθηκε αύξηση στην κατανάλωση οσπρίων, πουλερικών, ελαιόλαδου και αλμυρών σνακ (p-value < 0.05) και μείωση στην κατανάλωση γαλακτοκομικών προϊόντων (p-value < 0.05). Η παρούσα μελέτη συμβάλλει στην καλύτερη κατανόηση των πτυχών της πανδημίας και της επίδρασης της στον τρόπο ζωής. Βέβαια απαιτούνται πιο εκτενείς μελέτες για να μελετηθούν όλες οι επιδράσεις και να εξαχθούν ασφαλέστερα συμπεράσματα.
Table S3: Pearson's correlation matrix for the phenomenological characteristics. from Comparing the phenomenological qualities of stimulus-independent thought, stimulus-dependent thought and dreams using experience sampling
Creators: name: Gross, M. E.
name: A. P. Smith
name: Y. M. Graveline
name: R. E. Beaty
name: J. W. Schooler
name: Seli, P.
Publisher: name: The Royal Society
Year: 2020
Subjects: subject: 170299 Cognitive Science not elsewhere classified
subject: FOS: Psychology

description: Humans spend a considerable portion of their lives engaged in ‘stimulus-independent thoughts' (SIT), or mental activity that occurs independently of input from the immediate external environment. Although such SITs are, by definition, different from thoughts that are driven by stimuli in one's external environment (i.e. stimulus-dependent thoughts; SDTs), at times, the phenomenology of these two types of thought appears to be deceptively similar. But how similar are they? We address this question by comparing the content of two types of SIT (dreaming and waking SITs) with the content of SDTs. In this 7 day, smartphone-based experience-sampling procedure, participants were intermittently probed during the day and night to indicate whether their current thoughts were stimulus dependent or stimulus independent. They then responded to content-based items indexing the qualitative aspects of their experience (e.g. My thoughts were jumping from topic to topic). Results indicate substantial distinctiveness between these three types of thought: significant differences between at least two of the three traits were found across every measured variable. Implications are discussed.This article is part of the theme issue ‘Offline perception: voluntary and spontaneous perceptual experiences without matching external stimulation’.
Additional file 1 of Composition of Anopheles species and bionomic characteristics over the peak malaria transmission season in Bandarban, Bangladesh
Creators: name: Al-Amin, Hasan Mohammad
name: Rodriguez, Isabella
name: Phru, Ching Swe
name: Khan, Wasif A.
name: Haque, Rashidul
name: Nahlen, Bernard L.
name: Burton, Timothy A.
name: Alam, Mohammad Shafiul
name: Lobo, Neil F.
Publisher: name: figshare
Year: 2023
Subjects: subject: Medicine
subject: Ecology
subject: FOS: Biological sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: Cancer

description: Additional file 1: Figure S1. A. Map of Bangladesh with the malaria endemic regions labeled in yellow. Bandarban District, with the highest malaria is colored orange with the study site outlined in blue. B. The study sites (1) Noa Para, (2) Rubber Bagan, (3) Prue Mong U Headman Para, and (4) Jogesh and Chikka Para. The map was published in an accompanying article ( https://doi.org/10.1186/s12936-022-04375-4 ) which was a part of the same project. Table S1. Trap-based sampling comparisons. Trapping method, species, and location impacted sampling rates.
Table S6. Spearman's correlations for number of probe responses and the probe number. Fifty-six probes were delivered over 7 days; probe number refers to the number probe (1 through 56). These negative correlations represent the decrease in responses over the course of probe deliveries. from Comparing the phenomenological qualities of stimulus-independent thought, stimulus-dependent thought and dreams using experience sampling
Creators: name: Gross, M. E.
name: A. P. Smith
name: Y. M. Graveline
name: R. E. Beaty
name: J. W. Schooler
name: Seli, P.
Publisher: name: The Royal Society
Year: 2020
Subjects: subject: 170299 Cognitive Science not elsewhere classified
subject: FOS: Psychology

description: Humans spend a considerable portion of their lives engaged in ‘stimulus-independent thoughts' (SIT), or mental activity that occurs independently of input from the immediate external environment. Although such SITs are, by definition, different from thoughts that are driven by stimuli in one's external environment (i.e. stimulus-dependent thoughts; SDTs), at times, the phenomenology of these two types of thought appears to be deceptively similar. But how similar are they? We address this question by comparing the content of two types of SIT (dreaming and waking SITs) with the content of SDTs. In this 7 day, smartphone-based experience-sampling procedure, participants were intermittently probed during the day and night to indicate whether their current thoughts were stimulus dependent or stimulus independent. They then responded to content-based items indexing the qualitative aspects of their experience (e.g. My thoughts were jumping from topic to topic). Results indicate substantial distinctiveness between these three types of thought: significant differences between at least two of the three traits were found across every measured variable. Implications are discussed.This article is part of the theme issue ‘Offline perception: voluntary and spontaneous perceptual experiences without matching external stimulation’.
An interactive motion perception tool for kindergarteners (and vision scientists)
Creators: name: Battaje, Aravind
name: Brock, Oliver
name: Rolfs, Martin
Publisher: name: Technische Universität Berlin
Year: 2023
Subjects: subject: 600 Technik, Medizin, angewandte Wissenschaften::620 Ingenieurwissenschaften::620 Ingenieurwissenschaften und zugeordnete Tätigkeiten
subject: spatiotemporal filtering
subject: motion energy
subject: interactive
subject: visual illusions
subject: science education
subject: eye movement

description: We implement Adelson and Bergen's spatiotemporal energy model with extension to three-dimensional (x–y–t) in an interactive tool. It helps gain an easy understanding of early (first-order) visual motion perception. We demonstrate its usefulness in explaining an assortment of phenomena, including some that are typically not associated with the spatiotemporal energy model.
Table S2: Intercepts from the multi-level binary logistic regression analyses from Comparing the phenomenological qualities of stimulus-independent thought, stimulus-dependent thought and dreams using experience sampling
Creators: name: Gross, M. E.
name: A. P. Smith
name: Y. M. Graveline
name: R. E. Beaty
name: J. W. Schooler
name: Seli, P.
Publisher: name: The Royal Society
Year: 2020
Subjects: subject: 170299 Cognitive Science not elsewhere classified
subject: FOS: Psychology

description: Humans spend a considerable portion of their lives engaged in ‘stimulus-independent thoughts' (SIT), or mental activity that occurs independently of input from the immediate external environment. Although such SITs are, by definition, different from thoughts that are driven by stimuli in one's external environment (i.e. stimulus-dependent thoughts; SDTs), at times, the phenomenology of these two types of thought appears to be deceptively similar. But how similar are they? We address this question by comparing the content of two types of SIT (dreaming and waking SITs) with the content of SDTs. In this 7 day, smartphone-based experience-sampling procedure, participants were intermittently probed during the day and night to indicate whether their current thoughts were stimulus dependent or stimulus independent. They then responded to content-based items indexing the qualitative aspects of their experience (e.g. My thoughts were jumping from topic to topic). Results indicate substantial distinctiveness between these three types of thought: significant differences between at least two of the three traits were found across every measured variable. Implications are discussed.This article is part of the theme issue ‘Offline perception: voluntary and spontaneous perceptual experiences without matching external stimulation’.