cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Dual adaptive control of chip refiner motor load
Creators: name: Allison, Bruce James
Publisher: name: University of British Columbia
Year: 2009

description: A characteristic of wood chip refiners is that the incremental gain between the motor load and the plate gap is subject to a slow drift due to plate wear and sudden changes in sign due to pulp pad collapse. A pad collapse can be caused by a change in operating point, or may occur suddenly due to a feed rate or consistency disturbance. This poses a problem for fixed-parameter linear controllers which may actually accelerate pad collapse and induce plate clashing as a result of getting caught in a positive feedback loop. The objective of this thesis is to develop a reliable chip refiner motor load controller and to test it out on an industrial refiner. The problem is approached from a fault detection and control viewpoint and the proposed algorithm consists of an improved parameter estimator and a controller containing "dual" features. The role of the improved estimator is to track both drifts and jumps in the parameters. The use of active learning or probing in the controller is justified by the fact that the parameter estimates are key to identifying a pad collapse, and that probing targets a portion of the input energy at continuously identifying these parameters. Since there still does not exist a general dual controller design methodology, the main challenge was to extend existing suboptimal approaches to handle realistic dynamics including deadtime and correlated disturbances. To track both slow and fast changes in the system parameters, a multi-model approach called adaptive forgetting through multiple models or AFMM is used. A method of modifying the AFMM to include information about what to expect in the event of a pad collapse is proposed. The main contribution of the thesis is the development of the active adaptive controller or AAC, which consists of a constrained certainty equivalence approach coupled with an extended output horizon to deal with nonminimum phase systems and a cost function extension to get probing. Finally, the AAC is combined with the AFMM, and the resulting combination is tested on an industrial refiner.
Influence of digoxin-like immunoreactive factor on late complications in patients with diabetes mellitus
Creators: name: Straub, R. H.
name: Elbracht, R.
name: Krämer, Bernhard K.
name: Roth, M.
name: Palitzsch, K.-D.
name: Schölmerich, J.
Publisher: name: Universität Regensburg
Year: 1994
Subjects: subject: 610 Medizin
subject: Adolescent
subject: Adult
subject: Aged
subject: Blood Proteins/analysis
subject: Cardenolides
subject: Cardiovascular Diseases/complications
subject: Diabetes Mellitus, Type 1/complications
subject: Diabetes Mellitus, Type 2/complications
subject: Diabetic Angiopathies/complications
subject: Diabetic Nephropathies/complications
subject: Diabetic Neuropathies/complications
subject: Diabetic Retinopathy/complications
subject: Digoxin
subject: Female
subject: Humans
subject: Male
subject: Middle Aged
subject: Saponins
subject: Severity of Illness Index

description: The aim of this study was to compare the intensity of typical late complications in diabetic patients (n = 65, 28 type I, 37 type II) who were not on glycoside drugs with low vs. high serum levels of digoxin-like immunoreactive factor (DLIF: group I, n = 42, DLIF < or = the detection limit of 0.2 ng ml-1; and group II, n = 23, mean +/- SEM: 1.17 +/- 0.31 [0.25-4.96] ng ml-1). For detection of nephropathy, urinary albumin excretion (24 h) and creatinine clearance tests were used. For coronary heart disease a questionnaire and standard ECG; for peripheral occlusive vascular disease a questionnaire; for eye disease a fundoscopy; for neuropathy a neurological score system; and for autonomic neuropathy a standardized test battery was employed. Patients with high DLIF levels showed better test results in vibratory perception (95.7 +/- 1.5 vs. 82.8 +/- 3.8%, normal finding = 100%, 2p = 0.016), had better percentile localizations concerning maximal pupillary area in darkness (28.4 +/- 6.6 vs. 8.1 +/- 1.8%, 2p = 0.0004), contraction velocity at 1 s (21.5 +/- 5.8 vs. 8.0 +/- 2.2%, 2p = 0.012), and dilation velocity at 6 s (23.0 +/- 6.8 vs. 10.5 +/- 2.5%, 2p = 0.041), had less retinopathy (with retinopathy: 26.1% vs. 64.3%, 2p = 0.0028), and better percentile localizations in the respiratory sinus arrhythmia test (68.4 +/- 7.3 vs. 44.1 +/- 4.9%, 2p = 0.0064). There was no difference concerning nephropathy, blood pressure, coronary heart disease and peripheral vascular disease. Separate analysis according to the type of diabetes confirmed the results in each group.(ABSTRACT TRUNCATED AT 250 WORDS)
Domain Adapting Ability of Self-Supervised Learning for Face Recognition
Creators: name: Lin, Chun-Hsien
name: Wu, Bing-Fei
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Although deep convolutional networks have achieved great performance in face recognition tasks, the challenge of domain discrepancy still exists in real world applications. Lack of domain coverage of training data (source domain) makes the learned models degenerate in a testing scenario (target domain). In face recognition tasks, classes in two domains are usually different, so classical domain adaptation approaches, assuming there are shared classes in domains, may not be reasonable solutions for this problem. In this paper, self-supervised learning is adopted to learn a better embedding space where the subjects in target domain are more distinguishable. The learning goal is maximizing the similarity between the embeddings of each image and its mirror in both domains. The experiments show its competitive results compared with prior works. To know the reason why it can achieve such performance, we further discuss how this approach affects the learning of embeddings.
Tunnel magnetoresistance and robust room temperature exchange bias with multiferroic BiFeO3 epitaxial thin films
Creators: name: Bea, H.
name: Bibes, M.
name: Cherifi, S.
name: Nolting, F.
name: Warot-Fonrose, B.
name: Fusil, S.
name: Herranz, G.
name: Deranlot, C.
name: Jacquet, E.
name: Bouzehouane, K.
name: Barthelemy, A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We report on the functionalization of multiferroic BiFeO3 epitaxial films for spintronics. A first example is provided by the use of ultrathin layers of BiFeO3 as tunnel barriers in magnetic tunnel junctions with La2/3Sr1/3MnO3 and Co electrodes. In such structures, a positive tunnel magnetoresistance up to 30% is obtained at low temperature. A second example is the exploitation of the antiferromagnetic spin structure of a BiFeO3 film to induce a sizeable (~60 Oe) exchange bias on a ferromagnetic film of CoFeB, at room temperature. Remarkably, the exchange bias effect is robust upon magnetic field cycling, with no indications of training.
description: 15 pages, 4 figures
Additional file 8 of Plastid phylogenomic insights into relationships of all flowering plant families
Creators: name: Li, Hong-Tao
name: Luo, Yang
name: Gan, Lu
name: Ma, Peng-Fei
name: Gao, Lian-Ming
name: Yang, Jun-Bo
name: Cai, Jie
name: Gitzendanner, Matthew A.
name: Fritsch, Peter W.
name: Zhang, Ting
name: Jin, Jian-Jun
name: Zeng, Chun-Xia
name: Wang, Hong
name: Yu, Wen-Bin
name: Zhang, Rong
name: van der Bank, Michelle
name: Olmstead, Richard G.
name: Hollingsworth, Peter M.
name: Chase, Mark W.
name: Soltis, Douglas E.
name: Soltis, Pamela S.
name: Yi, Ting-Shuang
name: Li, De-Zhu
Publisher: name: figshare
Year: 2021
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 8: Figure S7. Phylogenetic tree of 4792 plastomes of 4660 species of seed plants. All bootstrap values are shown.
Variational coupled cluster for ground and excited states
Creators: name: Marie, Antoine
name: Kossoski, Fábris
name: Loos, Pierre-François
Publisher: name: arXiv
Year: 2021
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Nuclear Theory (nucl-th)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: In single-reference coupled-cluster (CC) methods, one has to solve a set of non-linear polynomial equations in order to determine the so-called amplitudes which are then used to compute the energy and other properties. Although it is of common practice to converge to the (lowest-energy) ground-state solution, it is also possible, thanks to tailored algorithms, to access higher-energy roots of these equations which may or may not correspond to genuine excited states. Here, we explore the structure of the energy landscape of variational CC (VCC) and we compare it with its (projected) traditional version (TCC) in the case where the excitation operator is restricted to paired double excitations (pCCD). By investigating two model systems (the symmetric stretching of the linear \ce{H4} molecule and the continuous deformation of the square \ce{H4} molecule into a rectangular arrangement) in the presence of weak and strong correlations, the performance of VpCCD and TpCCD are gauged against their configuration interaction (CI) equivalent, known as doubly-occupied CI (DOCI), for reference Slater determinants made of ground- or excited-state Hartree-Fock orbitals or state-specific orbitals optimized directly at the VpCCD level. The influence of spatial symmetry breaking is also investigated.
description: 16 pages, 8 figures
Existence of optimal controls for singular control problems with state constraints
Creators: name: Budhiraja, Amarjit
name: Ross, Kevin
Publisher: name: arXiv
Year: 2007
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 93E20, 60K25, 49J30 (Primary)

description: We establish the existence of an optimal control for a general class of singular control problems with state constraints. The proof uses weak convergence arguments and a time rescaling technique. The existence of optimal controls for Brownian control problems \citehar, associated with a broad family of stochastic networks, follows as a consequence.
description: Published at http://dx.doi.org/10.1214/105051606000000556 in the Annals of Applied Probability (http://www.imstat.org/aap/) by the Institute of Mathematical Statistics (http://www.imstat.org)
A sublimated water atmosphere on Ganymede detected from Hubble Space Telescope observations
Creators: name: Roth, Lorenz
name: Ivchenko, Nickolay
name: Gladstone, G. Randall
name: Saur, Joachim
name: Grodent, Denis
name: Bonfond, Bertrand
name: Molyneux, Philippa M.
name: Retherford, Kurt D.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: Ganymede's atmosphere is produced by charged particle sputtering and sublimation of its icy surface. Previous far-ultraviolet observations of the O{\small I\,}1356-Å and O{\small I\,}1304-Å oxygen emissions were used to infer sputtered molecular oxygen (O$_2$) as an atmospheric constituent, but an expected sublimated water (H$_2$O) component remained undetected. Here we present an analysis of high-sensitivity spectra and spectral images acquired by the Hubble Space Telescope revealing H$_2$O in Ganymede's atmosphere. The relative intensity of the oxygen emissions requires contributions from dissociative excitation of water vapor, indicating that H$_2$O is more abundant than O$_2$ around the sub-solar point. Away from the sub-solar region, the emissions are consistent with a pure O$_2$ atmosphere. Eclipse observations constrain atomic oxygen to be at least two orders of magnitude less abundant than these other species. The higher H$_2$O/O$_2$ ratio above the warmer trailing hemisphere compared to the colder leading hemisphere, the spatial concentration to the sub-solar region, and the estimated abundance of $\sim$10$^{15}$ H$_2$O/cm$^{2}$ are consistent with sublimation of the icy surface as source.
description: published in Nature Astronomy (2021) (reformatted for arXiv)
Direct Evidence for Magnetic Reflection of Heavy Ions from High Mach Number Collisionless Shocks
Creators: name: Madanian, Hadi
name: Schwartz, Steven J.
name: Fuselier, Stephen A.
name: Burgess, David
name: Turner, Drew L.
name: Chen, Li-Jen
name: Desai, Mihir I.
name: Starkey, Michael J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Strong shocks in collisionless plasmas, such as supernovae shocks and shocks driven by coronal mass ejections, are known to be a primary source of energetic particles. Due to their different mass per charge ratio, the interaction of heavy ions with the shock layer differs from that of protons, and injection of these ions into acceleration processes is a challenge. Here we show the first direct observational evidence of magnetic reflection of alpha particles from a high Mach number quasi-perpendicular shock using in-situ spacecraft measurements. The intense magnetic amplification at the shock front associated with nonstationarity modulates the trajectory of alpha particles, some of which travel back upstream as they gyrate in the enhanced magnetic field and experience further acceleration in the upstream region. Our results in particular highlight the important role of high magnetic amplification in seeding heavy ions into the energization processes at nonstationary reforming shocks.
Testing the suitability of polynomial models in errors-in-variables problems
Creators: name: Hall, Peter
name: Ma, Yanyuan
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics
subject: 62G08, 62G09, 62G10, 62G20 (Primary)

description: A low-degree polynomial model for a response curve is used commonly in practice. It generally incorporates a linear or quadratic function of the covariate. In this paper we suggest methods for testing the goodness of fit of a general polynomial model when there are errors in the covariates. There, the true covariates are not directly observed, and conventional bootstrap methods for testing are not applicable. We develop a new approach, in which deconvolution methods are used to estimate the distribution of the covariates under the null hypothesis, and a ``wild'' or moment-matching bootstrap argument is employed to estimate the distribution of the experimental errors (distinct from the distribution of the errors in covariates). Most of our attention is directed at the case where the distribution of the errors in covariates is known, although we also discuss methods for estimation and testing when the covariate error distribution is estimated. No assumptions are made about the distribution of experimental error, and, in particular, we depart substantially from conventional parametric models for errors-in-variables problems.
description: Published in at http://dx.doi.org/10.1214/009053607000000361 the Annals of Statistics (http://www.imstat.org/aos/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Ανάπτυξη Android εφαρμογής, για άτομα με προβλήματα όρασης
Creators: name: Σφυρή, Καλλιόπη Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Android Εφαρμογή
Άτομα με πρόβλημα όρασης
Εναλλακτικές μέθοδοι πλοήγησης
Android Application
Visually Impaired
Alternative navigating methods

description: Στις μέρες μας, η τεχνολογία έχει γίνει μέρος της καθημερινότητας κάθε ατόμου ανεξαρτήτου ηλικίας. Αρχικά, με την εξέλιξη της κινητής τηλεφωνίας και προσφάτως με την εξέλιξη των φορητών συσκευών. Σήμερα, ελάχιστοι είναι εκείνοι που δε χρησιμοποιούν κάποια έξυπνη συσκευή, όπως είναι τα smartphones, τα tablets οι smart TVs και πολλά άλλα. Η εξέλιξη της τεχνολογίας των φορητών συσκευών βοηθά την επικοινωνία, την ψυχαγωγία την διεκπεραίωση διάφορων εργασιών και σε ορισμένες περιπτώσεις την εκπαίδευση. Είναι όμως αυτές οι συσκευές εύχρηστες και για τα άτομα με αναπηρίες; Σε ποιο βαθμό μπορεί η τεχνολογία να βοηθήσει τέτοιους ανθρώπους; Πραγματοποιώντας μια έρευνα στον κατάλογο των διαθέσιμων εφαρμογών για φορητές συσκευές, παρατηρείται ότι υπάρχει πληθώρα εφαρμογών για τη βελτίωση της καθημερινότητας τέτοιων ατόμων. Παράλληλα όμως, υπάρχει και μία έλλειψη σε εκπαιδευτικές εφαρμογές. Με βάση τα παραπάνω ερωτήματα αναπτύχθηκε μία εκπαιδευτική εφαρμογή για άτομα με προβλήματα όρασης, έχοντας χρησιμοποιήσει τις διαθέσιμες τεχνολογίες για την ανάπτυξη εφαρμογών σε φορητές συσκευές. Σκοπός αυτής της εφαρμογής, πέρα από τον εκπαιδευτικό της χαρακτήρα, είναι η κατανόηση των προβλημάτων που καλείται να αντιμετωπίσει ένα άτομο με προβλήματα όρασης σε σχέση με τη χρήση μιας φορητής συσκευής και πως μπορεί να συμβάλλει σ’ αυτό η τεχνολογία του μέλλοντος.
description: Nowadays, technology has become part of everyday life of any person, despite his age. This firstly began, when mobile telecommunications developed and more recently with the development of mobile devices. Today, there are only few people who do not use any smart device, such as smartphones, tablets, smart TVs etc. The evolution of technology on mobile devices helped in communications, entertainment, processing various tasks and in some cases education. Are people with disabilities though, enable to use mobile devices? How can technology help such people? While researching the list of available applications for the mobile devices, it is observed that there are numerous applications for improving everyday life of people with disabilities. At the same time, there is a deficiency in educational applications. Considering above questions, an educational application has developed for the visually impaired. For the development of this application, current technology for mobile devices has been used. The aim of this application, is to educate users and understanding the issues, that a visually impaired person is facing when he uses a mobile device and how future technology could contribute to solve those issues.
description: Σε συνεργασία με το τμήμα Λογιστικής και Χρηματοοικονομικής (Πανεπιστήμιο Μακεδονίας)
Special drilling mud chemical additives for deep drilling
Creators: name: Αγγελακάκη, Σωτηρία Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Drilling fluid
Mud
Deep Drilling
Πολφός διάτρησης
Λάσπη
Γεώτρηση

description: What is the role of the various additives used to synthesize the drilling mud while a drilling operation? Drilling mud additives are being used to assure the success of drilling and maintain stability throughout the operation. Someone may say drilling fluids are designed to solve or minimize many drilling problems. From the early stages of the first drilling fluids to the sophisticated contemporary systems, drilling mud has been the heart of drilling operations. Its circulation circuit, required functions and chemical composition are presented. My goal for this thesis was to prepare a document that could serve as a short guide for drilling mud purposes and composition. For the most part, I oriented the review towards the role of drilling mud additives and their contribution to mud properties. I chose to discuss each item in this review in the order in which it is encountered in any other book with relevant content.
description: Διατριβή Ειδίκευσής με θέμα DRILLING MUD ADDITIVES, η οποία πραγματεύεται την ιστορική και τεχνολογική εξέλιξη των πολφών γεώτρησης. Συγκεκριμένα ερευνήθηκαν οι πολφοί διάτρησης μου έχουν ως βάση το νερό, τη πετρέλαιο ή κάποιο συνθετικό πολυμερές. Αναλύθηκε η σύσταση των παραπάνω τύπων και των ιδιοτήτων τους. Επίσης παρουσιάστηκαν τα διάφορα ειδικά χημικά πρόσθετα που χρησιμοποιούνται στα ρευστά διάτρησης καθώς και οι ιδιότητες που επιφέρουν σε αυτά. Aναλυτικότερα, στην έκθεση περιλαμβάνονται η περιγραφή της κυκλοφορίας της λάσπης γεώτρησης, το σύστημα διαχείρισης στερεών, η αστάθεια των μαλακών σχηματισμών που συναντώνται κατά περιπτώσεις, τα κριτήρια με βάση τα οποία επιλέγονται τα διάφορα πρόσθετα αλλά και οι προκλήσεις που συναντώνται κατά τη διάτρηση εδαφών σε βαθιά και πολύ βαθιά νερά. Η έρευνα βασίστηκε στη μέχρι σήμερα διαθέσιμη βιβλιογραφία και είναι διατυπωμένη στην αγγλική γλώσσα.
description: Συνεργαζόμενα Πανεπιστήμια: Γεωλογίας και Γεωπεριβάλλοντος (Εθνικό και Καποδιστριακό Πανεπιστήμιο Αθηνών), Μηχανικών Μεταλλείων Μεταλλουργών (Εθνικό Μετσόβιο Πολυτεχνείο), Οικονομικών Επιστημών (Δημοκρίτειο Πανεπιστήμιο Θράκης)
Observation of a transverse magnetization in the ordered phases of the pyrochlore magnet Gd2Ti2O7
Creators: name: Glazkov, V. N.
name: Marin, C.
name: Sanchez, J. -P.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We have performed a detailed transverse magnetization study of the pyrochlore antiferromagnet Gd2Ti2O7. A transverse magnetization of about 10^{-3}M_{sat} is observed in the low-temperature ordered phases. These measurements result in the refinement of the Gd2Ti2O7 phase diagrams. Observation of a transverse magnetization indicates loss of the cubic symmetry in some of the magnetic phases and provides new information for a better understanding of the complicated magnetic ordering of Gd2Ti2O7.
description: 8 pages, 4 figures
Distinctive magnetic properties of CrI3 and CrBr3 monolayers caused by spin-orbit coupling
Creators: name: Bacaksiz, C.
name: Šabani, D.
name: Menezes, R. M.
name: Milošević, M. V.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: After the discovery of magnetism in monolayer CrI3, the magnetic properties of different 2D materials from the chromium-trihalide family are intuitively assumed to be similar, yielding magnetic anisotropy from the spin-orbit coupling on halide ligands. Here we reveal significant differences between the CrI3 and CrBr3 magnetic monolayers in their magnetic anisotropy, resulting Curie temperature, hysteresis in external magnetic field, and evolution of magnetism with strain, all predominantly attributed to distinctly different interplay of atomic contributions to spin-orbit coupling in two materials.
Gauge Singlet Scalars as Cold Dark Matter
Creators: name: McDonald, John
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In light of recent interest in minimal extensions of the Standard Model and gauge singlet scalar cold dark matter, we provide an arXiv preprint of the paper, published as Phys.Rev. D50 (1994) 3637, which presented the first detailed analysis of gauge singlet scalar cold dark matter.
description: 37 pages, 11 figures, LaTeX
Conundrum of weak noise limit for diffusion in a tilted periodic potential
Creators: name: Spiechowicz, Jakub
name: Łuczka, Jerzy
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: The weak noise limit of dissipative dynamical systems is often the most fascinating one. In such a case fluctuations can interact with a rich complexity frequently hidden in deterministic systems to give rise of completely new phenomena that are absent for both noiseless and strong fluctuations regimes. Unfortunately, this limit is also notoriously hard to approach analytically or numerically. We reinvestigate in this context the paradigmatic model of nonequlibrium statistical physics consisting of inertial Brownian particle diffusing in a tilted periodic potential by exploiting the state of the art computer simulations of unprecedented time scale. In contrast to the previous results on this long standing problem we draw an inference that in the parameter regime for which the particle velocity is bistable the lifetime of ballistic diffusion diverges to infinity when thermal noise intensity tends to zero, i.e. an everlasting ballistic diffusion emerges. As a consequence the diffusion coefficient does not reach its stationary constant value.
description: in press in Phys. Rev. E
Superconductivity in two-band systems with variable charge carrier density. The case of MgB2
Creators: name: Palistrant, M. E.
name: Ursu, V. A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The theory of thermodynamic properties of two-band superconductor with reduced density charge carriers is developed on the base of phonon superconducting mechanism with strong electron-phonon interaction. This theory is adapted to describe the behavior of critical temperature Tc, energy gaps Delta1, Delta2, and the relative jump of electron specific heat (Cs - Cn)/Cn in the point T = Tc along with the variation of charge carrier density in the compound MgB2 when substitutional impurities with different valence are introduced into the system. It is shown, that according to the filling mechanism of energy bands which overlap on Fermi surface, the quantities Tc, Delta1, Delta2 decrease when this compound is doped with electrons and remain constant or weakly change when the system is doped with holes. The theory qualitatively agrees with the experimental data. Also is shown that the consideration of inter- and intraband scattering of electrons on impurity potential improves this agreement.
description: 19 pages, 6 figures, 1 table. to be published in JETP (first number 2007)
Additional file 2 of Evaluation of the protective efficacy of a spatial repellent to reduce malaria incidence in children in Mali compared to placebo: study protocol for a cluster-randomized double-blinded control trial (the AEGIS program)
Creators: name: Van Hulle, Suzanne
name: Sagara, Issaka
name: Mbodji, Momar
name: Nana, Ghislain Ismael
name: Coulibaly, Mamadou
name: Dicko, Alassane
name: Kone, Mamady
name: Thera, Ismaila
name: Sylla, Daman
name: Traore, Mamadou Diango
name: Liu, Fang
name: Grieco, John P.
name: Achee, Nicole L.
Publisher: name: figshare
Year: 2022
Subjects: subject: Medicine
subject: Environmental Sciences not elsewhere classified
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Cancer
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Virology
subject: Computational Biology

description: Additional file 2.
Second-order gravitational self-force
Creators: name: Rosenthal, Eran
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We derive an expression for the second-order gravitational self-force that acts on a self-gravitating compact-object moving in a curved background spacetime. First we develop a new method of derivation and apply it to the derivation of the first-order gravitational self-force. Here we find that our result conforms with the previously derived expression. Next we generalize our method and derive a new expression for the second-order gravitational self-force. This study also has a practical motivation: The data analysis for the planned gravitational wave detector LISA requires construction of waveforms templates for the expected gravitational waves. Calculation of the two leading orders of the gravitational self-force will enable one to construct highly accurate waveform templates, which are needed for the data analysis of gravitational-waves that are emitted from extreme mass-ratio binaries.
description: 35 pages
Additional file 1 of Elevated plasma triglyceride concentration and risk of adverse clinical outcomes in 1.5 million people: a CALIBER linked electronic health record study
Creators: name: Patel, Riyaz S.
name: Pasea, Laura
name: Soran, Handrean
name: Downie, Paul
name: Jones, Richard
name: Hingorani, Aroon D.
name: Neely, Dermot
name: Denaxas, Spiros
name: Hemingway, Harry
Publisher: name: figshare
Year: 2022
Subjects: subject: Biochemistry
subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Pharmacology
subject: Biotechnology
subject: Chemical Sciences not elsewhere classified
subject: Immunology
subject: FOS: Clinical medicine
subject: Cancer
subject: Virology

description: Additional file 1. STROBE Statement—checklist of items that should be included in reports of observational studies.
Comprehensive Overview of Biogas for Sanitation Options – Training of Trainers
Creators: name: Reysset, Marie
name: , Bill
Publisher: name: Gates Open Research
Year: 2021

description: This publication is the result of the technical assistance provided by UPM Umwelt-Projekt- Management GmbH (UPM) and its partners, the Centre for Sustainable and Ecological Sanitation (CSES) of the University of Science & Technology Beijing (USTB), and the Bureau of Socioeconomic Research and Training (BSERT) of the Bangladesh University of Agriculture (BAU) to the United Nations High Commissioner for Refugees (UNHCR), the Department of Public Health Engineering (DPHE) and the local WASH sector in Cox’s Bazar, Bangladesh, in cooperation with the Bill & Melinda Gates Foundation.
 The goal of this technical assistance assignment was to provide support to the emergency WASH sector and local administration, regarding sanitation and faecal sludge management, with focus on value—recovery in emergency settings, in order to sustainably improve the living conditions of displaced populations and their hosting communities.
 The present manual “Comprehensive Overview of Biogas for Sanitation Options- Training of Trainers” has been elaborated after a three-day training on “Biogas Sanitation Systems for Rohingya Refugee Camps” organised with engineers and technicians of BRAC working in the area in December 2018.
 This training manual is part of a "Methodologies & Application from Documented Experience" series.
Minimum mass-radius ratio for charged gravitational objects
Creators: name: Boehmer, C. G.
name: Harko, T.
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We rigorously prove that for compact charged general relativistic objects there is a lower bound for the mass-radius ratio. This result follows from the same Buchdahl type inequality for charged objects, which has been extensively used for the proof of the existence of an upper bound for the mass-radius ratio. The effect of the vacuum energy (a cosmological constant) on the minimum mass is also taken into account. Several bounds on the total charge, mass and the vacuum energy for compact charged objects are obtained from the study of the Ricci scalar invariants. The total energy (including the gravitational one) and the stability of the objects with minimum mass-radius ratio is also considered, leading to a representation of the mass and radius of the charged objects with minimum mass-radius ratio in terms of the charge and vacuum energy only.
description: 19 pages, accepted by GRG, references corrected and added
Imprints of high-momentum nucleons in nuclei on hard photons from heavy-ion collisions around the Fermi Energy
Creators: name: Guo, Wen-Mei
name: Li, Bao-An
name: Yong, Gao-Chan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The short-range correlation (SRC) induced by the tensor force in the isosinglet neutron-proton interaction channel leads to a high-momentum tail (HMT) in the single-nucleon momentum distributions n(k) in nuclei. Owing to the remaining uncertainties about the tensor force, the shape of the nucleon HMT may be significantly different from the dilute interacting Fermi gas model prediction $n(k) \sim1/k^4$ similar to the HMT in cold atoms near the unitary limit. Within an isospin- and momentum-dependent Boltzmann-Uehling-Uhlenbeck transport model incorporating approximately the nucleon HMT, we investigate hard photon emissions in $^{14}$N+$^{12}$C and $^{48}$Ca+$^{124}$Sn reactions at beam energies around the Fermi energy. Imprints of different shapes of the HMT on the energy spectrum, angular distribution and transverse momentum spectrum of hard photons are studied. While the angular distribution does not carry any information about the shape of the nucleon HMT, the energy spectra and especially the mid-rapidity transverse momentum spectra of hard photons are found to bare strong imprints of the shapes of nucleon HMTs in the two colliding nuclei.
description: More discussions added. Physical Review C in press
Integrated Dataset of Brazilian Flights
Creators: name: Teixeira, Claudio
name: Giusti, Lucas
name: Soares, Jorge
name: Santos, Joel dos
name: Amorim, Glauco
name: Ogasawara, Eduardo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Applications (stat.AP)
subject: FOS: Computer and information sciences

description: The Brazilian commercial aviation system achieved the first position among Latin American countries and the fifteenth place worldwide on the Revenue Passenger-Kilometer (RPK) ranking. The availability of data regarding flight, including flight information and meteorological conditions, enables studies about the Brazilian flight system, such as flight delays and timetabling. Therefore, this paper contributes to such studies by offering an integrated dataset containing data on departure and arrival for flights departing and arriving at Brazilian airports comprising the period from 2000 to 2019. This paper presents a dataset composed of $15,505,922$ records of flight data, each containing 45 attributes. The attributes include data regarding the airline, flight, airports, meteorological conditions, scheduled and elapsed times for departure and arrival.
Magnetic Helicity Flux across Solar Active Region Photospheres: II. Association of Hemispheric Sign Preference with Flaring Activity during Solar Cycle 24
Creators: name: Park, Sung-Hong
name: Leka, K. D.
name: Kusano, Kanya
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Plasma Physics (physics.plasm-ph)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: In our earlier study of this series (Park et al. 2020, Paper I), we examined the hemispheric sign preference (HSP) of magnetic helicity flux $dH/dt$ across photospheric surfaces of 4802 samples of 1105 unique active regions (ARs) observed during solar cycle 24. Here, we investigate any association of the HSP, expressed as a degree of compliance, with flaring activity, analyzing the same set of $dH/dt$ estimates as used in Paper I. The AR samples under investigation are assigned to heliographic regions (HRs) defined in the Carrington longitude-latitude plane with a grid spacing of 45$^\circ$ in longitude and 15$^\circ$ in latitude. For AR samples in each of the defined HRs, we calculate the degree of HSP compliance and the average soft X-ray flare index. The strongest flaring activity is found to be in one distinctive HR with an extremely low HSP compliance of 41% as compared to the mean and standard deviation of 62% and 7%, respectively, over all HRs. This sole HR shows an anti-HSP (i.e., less than 50%) and includes the highly flare-productive AR NOAA 12673, however this AR is not uniquely responsible for the HR's low HSP. We also find that all HRs with the highest flaring activity are located in the southern hemisphere, and they tend to have lower degrees of HSP compliance. These findings point to the presence of localized regions of the convection zone with enhanced turbulence, imparting a greater magnetic complexity and a higher flaring rate to some rising magnetic flux tubes.
description: 13 pages, 5 figures, accepted for publication in ApJ
Ανθεκτικότητα δικτύων επικονίασης και πως αυτή επηρεάζεται από την τοπολογία του δικτύου
Creators: name: Σαραντοπούλου, Ευφροσύνη Κωνσταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Ανθεκτικότητα δικτύων
Δίκτυα επικονίασης
Έμμεσες αλληλεπιδράσεις
Robustness
Pollination networks
Indirect relations

description: Η παρούσα μελέτη αφορά την ανθεκτικότητα των δικτύων επικονίασης γενικότερα και ειδικότερα στην περίπτωση εξαφάνισης ειδών. Η θεωρητική μελέτη (βιβλιογραφικά) αφορά τη σταθερότητα (stability), την επιμονή (persistence),την ανθεκτικότητα (resilience) και ευρωστία (robustness) των δικτύων σε σχέση με τις τοπολογικές ιδιότητες και αναφέρονται τα αποτελέσματα παλαιότερων ερευνών. Το πρακτικό μέρος αφορά την robustness των δικτύων επικονίασης. Για τον σκοπό αυτό χρησιμοποιήθηκαν 7 δίκτυα από νησιά της Ελλάδος και άλλα 22 από όλο τον κόσμο. Η ανθεκτικότητα πρώτα μελετήθηκε σε σχέση με την τοπολογία του δικτύου και άλλους υπάρχοντες δείκτες, από τους οποίους έδωσε εξάρτηση (συνδεσιμότητα, πλήθος ειδών, ασυμμετρία δικτύου, nestedness, modularity και κοινές αλληλεπιδράσεις). Λόγω της σημαντικότητας της κοινής επικονίασης (overlap) κατασκευάστηκαν δίκτυα που περιέχουν μόνο τα έντομα και οι συνδέσεις μεταξύ τους ήταν οι αναλογίες των κοινών αλληλεπιδράσεων τους. Χρησιμοποιώντας το κριτήριο του May για την σταθερότητα ενός δικτύου εξετάστηκε η ανθεκτικότητα τους που έδωσε εξάρτηση από την τυπική απόκλιση των τιμών της κοινής επικονίασης και όχι από την ισχύ τους. Τέλος κατασκευάστηκε ένας δείκτης που μετρά την ισχύ των έμμεσων αλληλεπιδράσεων μεταξύ των ειδών και η έρευνα μας έδειξε στατιστικά σημαντική θετική εξάρτηση της ανθεκτικότητας από την ισχύ αυτών.
description: This study is about the robustness of pollination networks in general and in particular in the case of species extinction. The theoretical study (bibliographic) concerns stability, persistence, resilience and robustness of the networks in relation to topological properties and the results of previous research are reported. The practical part is about the robustness of the pollination networks. For this purpose 7 networks from Greek islands were used and 22 from all over the world. Robustness was first studied in relation to network topology and other existing indices, from which it gave dependence (connectivity, number of species, network asymmetry, nestedness, modularity and common interactions). Due to the importance of niche overlap, networks that contain only insects were built, and the links between them were the proportions of their common interactions. Using the May criterion for the stability of a network, their robustness tested and the results showed dependence on the standard deviation of common pollination values rather than their power. Finally, an index measuring the strength of indirect interactions between species was constructed and our research showed a statistically significant positive dependence between the robustness of the network and the strength of indirect interactions.
High-redshift Ly alpha emitters with a large equivalent width: Properties of i-dropout galaxies with an NB921-band depression in the Subaru Deep Field
Creators: name: Nagao, Tohru
name: Murayama, Takashi
name: Maiolino, Roberto
name: Marconi, Alessandro
name: Kashikawa, Nobunari
name: Ajiki, Masaru
name: Hattori, Takashi
name: Ly, Chun
name: Malkan, Matthew A.
name: Motohara, Kentaro
name: Ohta, Kouji
name: Sasaki, Shunji S.
name: Shioya, Yasuhiro
name: Taniguchi, Yoshiaki
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report new follow-up spectroscopy of i-dropout galaxies with an NB921-band depression found in the Subaru Deep Field. The NB921-depressed i-dropout selection method is expected to select galaxies with large equivalent width Ly alpha emission over a wide redshift range, 6.0
description: 9 pages, 5 figures, accepted for publication in A&A
Superconductivity with Topological non-trivial surface states in NbC
Creators: name: Karn, N. K.
name: Sharma, M. M.
name: Sharma, Prince
name: Gurjar, Ganesh
name: Patnaik, S.
name: Awana, V. P. S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Quantum materials with non-trivial band topology and bulk superconductivity are considered superior materials to realize topological superconductivity. In this regard, we report detailed Density Functional Theory (DFT) calculations and Z2 invaraints for the NbC superconductor, exhibiting its band structure to be topologically non-trivial. Bulk superconductivity at 8.9K is confirmed through DC magnetization measurements under Field Cooled (FC) and Zero Field Cooled (ZFC) protocols. This superconductivity is found to be of type-II nature as revealed by isothermal M-H measurements and thus calculated the Ginzberg-Landau parameter. A large intermediate state is evident from the phase diagram, showing NbC to be a strong type-II superconductor. Comparing with earlier reports on superconducting NbC, a non-monotonic relationship of critical temperature with lattice parameters is seen. In conclusion, NbC is a type-II around 10K superconductor with topological non-trivial surface states.
description: 20 Pages Text + Figs: First time DFT calculations of Z2 invaraints for the NbC superconductor. Letter- J. Superconductivity Novel Magnetism (2021)
Μοντέρνα τρομοκρατία: Η αναπαράσταση της τρομοκρατικής δραστηριότητας του Ισλαμικού Κράτους εντός 2015-2016 από τα Μέσα Μαζικής Επικοινωνίας
Creators: name: Παπαϊωακείμ, Μαριάνθη Βασιλείου
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Terrorism
New media
ISIS
Τρομοκρατία
Ισλαμικό Κράτος
Νέα μέσα

description: Terrorism is a complicated phenomenon that is difficult to be accurately defined; that’s why there have been several interpretations of the phenomenon until now. Terrorism parallels the theatre and terrorist behavior is similar to a dramaturgical performance. Terrorist attacks gain the attention of media and publicity plays a vital role to the expansion of the phenomenon. The roots of it date back centuries ago, while modern terrorism which is correlated with New Media is a much more recent phenomenon. Many terrorist groups that existed in the past might have influenced the Islamic State, the terrorist organization that thrives recently. Al Qaeda, the predecessor of ISIS has affected the group’s activity to a big extent. However, ISIS forged its own path. The organization’s terrorist activity within 2015-2016 includes three major attacks; Paris, Brussels and Nice were afflicted. The way media represent terrorism is crucial. Three videos regarding Paris attack, Brussels bombings and Nice attack which have been uploaded on Al Jazeera, Vox and CNN respectively, circulate the World Wide Web and attract viewers
description: Η τρομοκρατία είναι ένα πολύπλοκο φαινόμενο το οποίο είναι δύσκολο να οριστεί γι’αυτό έχουν υπάρξει πολλές ερμηνείες του φαινομένου μέχρι σήμερα. Η τρομοκρατία παραλληλίζεται με ο θέατρο και η τρομοκρατική συμπεριφορά είναι παρόμοια με τη θεατρική παράσταση. Οι τρομοκρατικές ενέργειες ελκύουν το ενδιαφέρον των μέσων και η δημοσιότητα παίζει ζωτικό ρόλο στην εξάπλωση του φαινομένου. Οι ρίζες του βρίσκονται αιώνες πίσω, ενώ η μοντέρνα τρομοκρατία η οποία σχετίζεται με τα Νέα Μέσα είναι πολύ πιο πρόσφατο φαινόμενο. Πολλές τρομοκρατικές οργανώσεις που υπήρξαν στο παρελθόν ενδέχεται να έχουν επηρεάσει το Ισλαμικό Κράτος, την τρομοκρατική οργάνωση που ακμάζει τελευταία. Η Αλ Κάιντα, ο προκάτοχος του Ισλαμικού Κράτους έχει επηρεάσει τη δραστηριότητα της οργάνωσης σε μεγάλο βαθμό. Παρόλ’αυτά το Ισλαμικό Κράτος χάραξε τη δική του πορεία. Η τρομοκρατική δραστηριότητα της οργάνωσης εντός 2015-2016 περιλαμβάνει τρεις σημαντικές επιθέσεις: το Παρίσι, οι Βρυξέλες και η Νίκαια επλήγησαν. Ο τρόπος με τον οποίο τα μέσα αναπαριστούν την τρομοκρατία ειναι καίριας σημασίας. Τρία βίντεο που αφορούν τις επιθέσεις στο Παρίσι, στις Βρυξέλες και στη Νίκαια τα οποία έχουν προβληθεί στο Al Jazeera, στο Vox και στο CNN αντίστοιχα, κάνουν το γύρω του διαδικτύου και ελκύουν τους τηλεθεατές
Προστασία προσωπικών δεδομένων στις υπηρεσίες κοινωνικής δικτύωσης
Creators: name: Κουμτζής, Μιχαήλ Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Προστασία προσωπικών δεδομένων
Προσωπικά δεδομένα στα μέσα κοινωνικής δικτύωσης
Επεξεργασία προσωπικών δεδομένων
Personal data protection
Personal data in social networking websites
Personal data processing

description: O σκοπός της παρούσας εργασίας είναι να διερευνήσει τις πτυχές της ιδιωτικής ζωής και της προστασίας των προσωπικών δεδομένων στην χρήση των ιστοσελίδων κοινωνικής δικτύωσης. Πιο συγκεκριμένα, θα παρουσιασθούν τα είδη των υπηρεσιών κοινωνικής δικτύωσης και των μηχανισμών προστασίας που παρέχουν στον χρήστη. Στο πρώτο κεφάλαιο γίνεται μια εισαγωγή στις βασικές έννοιες της ιδιωτικότητας και των προσωπικών δεδομένων τα οποία χωρίζονται σε απλά και σε ευαίσθητα δεδομένα. Στο δεύτερο κεφάλαιο γίνεται μελέτη των διάφορων τύπων υπηρεσιών κοινωνικής δικτύωσης, που συναντάμε στο διαδίκτυο. Στη συνέχεια αναφέρονται τα οφέλη της χρήσης των υπηρεσιών κοινωνικής δικτύωσης καθώς και οι λόγοι επιτυχίας τους. Στο τρίτο κεφάλαιο εξετάζεται ο τρόπος με τον οποίο διασφαλίζεται η προστασία των προσωπικών δεδομένων στις διάφορες υπηρεσίες κοινωνικής δικτύωσης και ποιοι οι μηχανισμοί ασφαλείας τους. Στη συνέχεια αναφέρονται ορισμένες περιπτώσεις έντονων παραβιάσεων των προσωπικών δεδομένων στα δημοφιλή sites κοινωνικής δικτύωσης όπως το Facebook, το Twitter και το LinkedIn. Παρουσιάζονται επίσημα στατιστικά της χρήσης των κοινωνικών δικτύων και ποιες είναι οι προτιμήσεις των χρηστών όσον αφορά τις ρυθμίσεις μέσα από τις επιλογές που τους προσφέρει κάθε ιστότοπος κοινωνικής δικτύωσης. Το πέμπτο κεφάλαιο είναι αφιερωμένο στον πρόσφατο κανονισμό της Ευρωπαϊκής Ένωσης για την προστασία των φυσικών προσώπων έναντι της επεξεργασίας των δεδομένων προσωπικού χαρακτήρα και για την ελεύθερη κυκλοφορία των δεδομένων αυτών.
description: The purpose of this paper is to analyze aspects of privacy and personal data protection in the use of social networking websites. More specifically, will be presented the types of social networking services and protection mechanisms that they provide to the user. The first chapter introduces the basic concepts of privacy and personal data that are divided into simple and sensitive data. In the second chapter we study the different types of social networking services that we encounter on the internet. Below are the benefits of using social networking services as well as the reasons for their success. The third chapter discusses how privacy is protected in the various social networking websites and what their security mechanisms are. Below are some cases of intense violations of personal data on popular social networking sites such as Facebook, Twitter and LinkedIn. Furthermore there are official social networking statistics and user preferences for settings through the choices offered by each social networking site. The fifth chapter is devoted to the recent European Union regulation on the protection of individuals with regard to the processing of personal data and on the free movement of such data.
A common misconception about LIGO detectors of gravitational waves
Creators: name: Faraoni, Valerio
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: A common misconception about laser interferometric detectors of gravitational waves purports that, because the wavelength of laser light and the length of an interferometer's arm are both stretched by a gravitational wave, no effect should be visible, invoking an analogy with cosmological redshift in an expanding universe. The issue is clarified with the help of a direct calculation.
description: 9 pages, LaTeX, to appear in Gen. Rel. Grav