cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Οι πολιτικές των Ανανεώσιμων Πηγών Ενέργειας και η μελέτη της χρήσης της ηλιακής ενέργειας στην Περιφέρεια Νοτίου Αιγαίου μέσω της οικονομοτεχνικής μελέτης εγκατάστασης οικιακών φωτοβολταϊκών συστημάτ
Creators: name: Κατράκη, Ευγενία Παναγιώτη
Publisher: name: Aristotle University of Thessaloniki
Year: 2016
Subjects: Ανανεώσιμες Πηγές Ενέργειας
Φωτοβολταϊκά
Βιωσιμότητα
Renewable Energy Sources
Photovoltaic
Sustainability

description: Τη σημερινή εποχή την κύρια μορφή ενέργειας αποτελεί το πετρέλαιο και τα παράγωγα αυτού. Από την μία πλευρά, οι παγκόσμιες οικονομίες έχουν σαν προτεραιότητα την εξασφάλιση των ενεργειακών αναγκών τους με οποιασδήποτε κόστος και από την άλλη μεριά, υπάρχει η οικολογική καταστροφή από τα προϊόντα της καύσης του πετρελαίου, όπως το φαινόμενο του θερμοκηπίου. Η αξιοποίηση των Ανανεώσιμων Πηγών Ενέργειας (ΑΠΕ) αποτελεί σήμερα απαραίτητη προϋπόθεση για τη βελτίωση των ενεργειακών και περιβαλλοντικών συνθηκών ενός τόπου. Με σημαντική συμβολή στην αντιμετώπιση του ενεργειακού προβλήματος χωρίς επιβάρυνση του περιβάλλοντος, η παραγωγή ενέργειας από ανανεώσιμες πηγές είναι πια σε θέση να συμβάλει και με οικονομοτεχνικά οφέλη για μια αειφόρο ανάπτυξη σε επίπεδο οικιστικών συνόλων (τοπικό επίπεδο), όσο και σε περιφερειακό και εθνικό επίπεδο. Μία από τις σημαντικότερες Ανανεώσιμες Πηγές Ενέργειας θεωρείται η ηλιακή ενέργεια. Η μετατροπή της σε ηλεκτρική ενέργεια επιτυγχάνεται με τα φωτοβολταϊκά συστήματα. Στην παρούσα μελέτη θα παρουσιαστεί και θα αξιολογηθεί με τη χρήση οικονομικών δεικτών η εγκατάσταση ενός αυτόνομου οικιακού φωτοβολταϊκού συστήματος
description: Nowadays the main energy source is oil and its derivatives. On the one hand, global economies have as a priority to ensure their energy needs with any cost and on the other hand, there is the ecological destruction of the products of combustion of oil, such as the greenhouse effect. The utilization of Renewable Energy Sources (RES) is now a prerequisite for improving the energy and environmental conditions. With significant contribution to tackling the energy problem without damage to the environment, energy production from renewable sources is no longer able to contribute and economic benefits for sustainable development at the level of residential units (local), and at regional and national level. One of the most important Renewable Energies is solar energy. Its conversion into electricity is achieved with photovoltaic. In this study will be presented and evaluated using economic indicators the installation of an off-grid photovoltaic system.
Additional file 1 of An Axin2 mutation and perinatal risk factors contribute to sagittal craniosynostosis: evidence from a Chinese female monochorionic diamniotic twin family
Creators: name: Xu, Jin
name: Yan, Qing
name: Song, Chengcheng
name: Liang, Jingjia
name: Zhao, Liang
name: Zhang, Xin
name: Weng, Zhenkun
name: Xu, Cheng
name: Liu, Qian
name: Xu, Shuqin
name: Pang, Lu
name: Zhang, Liye
name: Sun, Yuan
name: Wang, Gang
name: Gu, Aihua
Publisher: name: figshare
Year: 2021
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 1
On conformal invariant integrals involving spin one-half and spin-one particles
Creators: name: Mitra, Indrajit
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We consider the evaluation of D-dimensional conformal invariant integrals which involve spin one-half and spin-one particles. The star-triangle relation for the massless Yukawa theory is derived, and the longitudinal part of the three-point Green function of massless QED is determined to the lowest order in position space. The operator algebraic method of calculating massless Feynman integrals is used for the evaluation.
description: 8 pages; one reference added, minor addition in Introduction, version to appear in J. Phys. A
Root Bundles and Towards Exact Matter Spectra of F-theory MSSMs
Creators: name: Bies, Martin
name: Cvetič, Mirjam
name: Donagi, Ron
name: Liu, Muyang
name: Ong, Marielle
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Algebraic Geometry (math.AG)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Motivated by the appearance of fractional powers of line bundles in studies of vector-like spectra in 4d F-theory compactifications, we analyze the structure and origin of these bundles. Fractional powers of line bundles are also known as root bundles and can be thought of as generalizations of spin bundles. We explain how these root bundles are linked to inequivalent F-theory gauge potentials of a $G_4$-flux. While this observation is interesting in its own right, it is particularly valuable for F-theory Standard Model constructions. In aiming for MSSMs, it is desired to argue for the absence of vector-like exotics. We work out the root bundle constraints on all matter curves in the largest class of currently-known F-theory Standard Model constructions without chiral exotics and gauge coupling unification. On each matter curve, we conduct a systematic "bottom"-analysis of all solutions to the root bundle constraints and all spin bundles. Thereby, we derive a lower bound for the number of combinations of root bundles and spin bundles whose cohomologies satisfy the physical demand of absence of vector-like pairs. On a technical level, this systematic study is achieved by a well-known diagrammatic description of root bundles on nodal curves. We extend this description by a counting procedure, which determines the cohomologies of so-called limit root bundles on full blow-ups of nodal curves. By use of deformation theory, these results constrain the vector-like spectra on the smooth matter curves in the actual F-theory geometry.
description: 38 pages + appendix
Risk hull method and regularization by projections of ill-posed inverse problems
Creators: name: Cavalier, L.
name: Golubev, Yu.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics
subject: 62G05, 62G20 (Primary)

description: We study a standard method of regularization by projections of the linear inverse problem $Y=Af+ε$, where $ε$ is a white Gaussian noise, and $A$ is a known compact operator with singular values converging to zero with polynomial decay. The unknown function $f$ is recovered by a projection method using the singular value decomposition of $A$. The bandwidth choice of this projection regularization is governed by a data-driven procedure which is based on the principle of risk hull minimization. We provide nonasymptotic upper bounds for the mean square risk of this method and we show, in particular, that in numerical simulations this approach may substantially improve the classical method of unbiased risk estimation.
description: Published at http://dx.doi.org/10.1214/009053606000000542 in the Annals of Statistics (http://www.imstat.org/aos/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Adapting to heterogeneous comfort levels
Creators: name: De Sanctis, Luca
name: Galla, Tobias
Publisher: name: arXiv
Year: 2006
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study the learning dynamics of agents who adapt to heterogeneous comfort levels in the context of an El-Farol type game, and show that even an infinitesimal degree of heterogeneity in the resource levels leads to a significant reduction of the fluctuations of the collective action, and removes the phase transition observed in models with homogeneous comfort level. Our analysis is based on dynamical methods of disordered systems theory, in particular on a generating functional approach, and confirmed by numerical experiments. We also report on simulations of a system in which the comfort levels fluctuate in time, and point out crucial differences between models in which the comfort levels of the agents fluctuate collectively and individually respectively. Finally we comment on a possible characterisation of El-Farol and Minority Games according to the presence or absence of ergodicity-breaking phase transitions at infinite integrated response.
description: 17 pages, 5 figures
Redshift spherical shell energy in isotropic Universes
Creators: name: Romano, Antonio Enea
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We introduce the redshift spherical shell energy (RSSE), which can be used to test in the redshift space the radial inhomogeneity of an isotropic universe, providing additional constraints for LTB models, and a more general test of cosmic homogeneity.
description: 11 pages, 2 figures, Accepted by Physical Review D15
First-principles studies of ground- and excited-state properties of MgO, ZnO, and CdO polymorphs
Creators: name: Schleife, A.
name: Fuchs, F.
name: Furthmüller, J.
name: Bechstedt, F.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: An ab initio pseudopotential method based on density functional theory, generalized gradient corrections to exchange and correlation, and projector-augmented waves is used to investigate structural, energetical, electronic and optical properties of MgO, ZnO, and CdO in rocksalt, cesium chloride, zinc blende, and wurtzite structure. In the case of MgO we also examine the nickel arsenide structure and a graphitic phase. The stability of the ground-state phases rocksalt (MgO, CdO) and wurtzite (ZnO) against hydrostatic pressure and biaxial strain is studied. We also present the band structures of all polymorphs as well as the accompanying dielectric functions. We discuss the physical reasons for the anomalous chemical trend of the ground-state geometry and the fundamental gap with the size of the group-II cation in the oxide. The role of the shallow Zn3d and Cd4d electrons is critically examined.
description: 13 pages, 9 figures
Neutron density distributions from antiprotonic 208Pb and 209Bi atoms
Creators: name: Klos, B.
name: Trzcinska, A.
name: Jastrzebski, J.
name: Czosnyka, T.
name: Kisielinski, M.
name: Lubinski, P.
name: Napiorkowski, P.
name: Pienkowski, L.
name: Hartmann, F. J.
name: Ketzer, B.
name: Ring, P.
name: Schmidt, R.
name: von Egidy, T.
name: Smolanczuk, R.
name: Wycech, S.
name: Gulda, K.
name: Kurcewicz, W.
name: Widmann, E.
name: Brown, B. A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The X-ray cascade from antiprotonic atoms was studied for 208Pb and 209Bi. Widths and shifts of the levels due to the strong interaction were determined. Using modern antiproton-nucleus optical potentials the neutron densities in the nuclear periphery were deduced. Assuming two parameter Fermi distributions (2pF) describing the proton and neutron densities the neutron rms radii were deduced for both nuclei. The difference of neutron and proton rms radii /\r_np equal to 0.16 +-(0.02)_{stat} +- (0.04)_{syst} fm for 208Pb and 0.14 +- (0.04)_{stat} +- (0.04)_{syst} fm for 209Bi were determined and the assigned systematic errors are discussed. The /\r_np values and the deduced shapes of the neutron distributions are compared with mean field model calculations.
description: 22 pages, 8 tables, 15 figures
ENISALA: II. Distinct Star Formation and Active Galactic Nucleus Activity in Merging and Relaxed Galaxy Clusters
Creators: name: Stroe, Andra
name: Sobral, David
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The growth of galaxy clusters is energetic and may trigger and/or quench star formation and black hole activity. The ENISALA project is a collection of multiwavelength observations aimed at understanding how large-scale structure drives galaxy and black hole evolution. Here, we introduce optical spectroscopy of over 800 H$α$ emission-line galaxies, selected in 14 z~0.15-0.31 galaxy clusters, spanning a range of masses and dynamical states. We investigate the nature of the emission lines in relation to the host galaxy properties, its location within the cluster, and the properties of the parent cluster. We uncover remarkable differences between mergers and relaxed clusters. The majority of H$α$ emission-line galaxies in merging cluster fields are located within 3 Mpc of their center. A large fraction of these line-emitters in merging clusters are powered by star formation irrespective of cluster-centric radius, while the rest are powered by active galactic nuclei. Star-forming galaxies are rare within 3 Mpc of relaxed clusters and active galactic nuclei are most abundant at their outskirts (~1.5-3 Mpc). We discover a population of star-forming galaxies with large equivalent widths and blue UV-optical colors, found exclusively in the merging clusters in our sample. The widespread emission-line activity in merging clusters is likely supported by triggered activity in recently-accreted, gas-rich galaxies. By contrast, our observations for relaxed clusters match established models, in which black hole activity is enhanced at the virial radius and star-formation is quenched within the infall region. We conclude that emission-line galaxies experience distinct evolutionary paths in merging and relaxed clusters.
description: Accepted for publication in the Astrophysical Journal. 30 pages, 22 figures, 3 tables. Main results can be found in Figures 14, 15, 16, 17 and 19
Additional file 1 of Sex differences in systemic metabolites at four life stages: cohort study with repeated metabolomics
Creators: name: Bell, Joshua A.
name: Ferreira, Diana L. Santos
name: Fraser, Abigail
name: Soares, Ana Luiza G.
name: Howe, Laura D.
name: Lawlor, Deborah A.
name: Carslake, David
name: Smith, George Davey
name: O’Keeffe, Linda M.
Publisher: name: figshare
Year: 2021
Subjects: subject: Biochemistry
subject: Physiology
subject: FOS: Biological sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: Science Policy

description: Additional file 1. Supplementary Methods.
Evolution of spiral galaxies in modified gravity: II- Gas dynamics
Creators: name: Tiret, O.
name: Combes, F.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The stability of spiral galaxies is compared in modified Newtonian Dynamics (MOND) and Newtonian dynamics with dark matter (DM). We extend our previous simulations that involved pure stellar discs without gas, to deal with the effects of gas dissipation and star formation. We also vary the interpolating function between the MOND and Newtonian regime. Bar formation is compared in both dynamics, from initial conditions identical in visible component. One first result is that the MOND galaxy evolution is not affected by the choice of the mu-function, it develops bars with the same frequency and strength. The choice of the mu-function significantly changes the equivalent DM models, in changing the dark matter to visible mass ratio and, therefore, changing the stability. The introduction of gas shortens the timescale for bar formation in the DM model, but is not significantly shortened in the MOND model. As a consequence, with gas, the MOND and DM bar frequency histograms are now more similar than without gas. The thickening of the plane occurs through vertical resonance with the bar and peanut formation, and even more quickly with gas. Since the mass gets more concentrated with gas, the radius of the peanut is smaller, and the appearance of the pseudo-bulge is more boxy. The bar strength difference is moderated by saturation, and feedback effects, like the bar weakening or destruction by gas inflow due to gravity torques. Averaged over a series of models representing the Hubble sequence, the MOND models have still more bars, and stronger bars, than the equivalent DM models, better fitting the observations. Gas inflows driven by bars produce accumulations at Lindblad resonances, and MOND models can reproduce observed morphologies quite well, as was found before in the Newtonian dynamics.
description: 9 pages, 11 figures, accepted in A&A
The Geometry of Cold, Metal-Enriched Gas Around Galaxies at $z\sim1.2$
Creators: name: Lundgren, Britt F.
name: Creech, Samantha
name: Brammer, Gabriel
name: Kirse, Nathan
name: Peek, Matthew
name: Wake, David
name: York, Donald G.
name: Chisholm, John
name: Erb, Dawn K.
name: Kulkarni, Varsha P.
name: Straka, Lorrie
name: Tremonti, Christy
name: van Dokkum, Pieter
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present the first results from a Hubble Space Telescope WFC3/IR program, which obtained direct imaging and grism observations of galaxies near quasar sightlines with a high frequency of uncorrelated foreground Mg II absorption. These highly efficient observations targeted 54 Mg II absorbers along the line of sight to nine quasars at $z_{qso}\sim2$. We find that 89% of the absorbers in the range $0.64< z < 1.6$ can be spectroscopically matched to at least one galaxy with an impact parameter less than 200 kpc and $|Δz|/(1+z)<0.006$. We have estimated the star formation rates and measured structural parameters for all detected galaxies with impact parameters in the range 7-200 kpc and star formation rates greater than 1.3 M$_{\odot}$ yr$^{-1}$. We find that galaxies associated with Mg II absorption have significantly higher mean star formation rates and marginally higher mean star formation rate surface densities compared to galaxies with no detected Mg II. Nearly half of the Mg II absorbers match to more than one galaxy, and the mean equivalent width of the Mg II absorption is found to be greater for groups, compared to isolated galaxies. Additionally, we observe a significant redshift evolution in the physical extent of Mg II-absorbing gas around galaxies and evidence of an enhancement of Mg II within 50 degrees of the minor axis, characteristic of outflows, which persists to 80 kpc around the galaxies, in agreement with recent predictions from simulations.
description: 21 pages, 20 figures, Submitted to ApJ
A WFI survey in the Chamaeleon II dark cloud
Creators: name: Spezzi, L.
name: Alcalá, J. M.
name: Frasca, A.
name: Covino, E.
name: Gandolfi, D.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the results of an optical multi-band survey for low-mass Pre-Main Sequence (PMS) stars and young Brown Dwarfs (BDs) in the Chamaeleon II (Cha II) dark cloud. This survey constitutes the complementary optical data to the c2d Spitzer Legacy survey in Cha II. Using the Wide-Field Imager (WFI) at the ESO 2.2m telescope, we surveyed a sky area of about 1.75 square degrees in Cha II. The region was observed in the Rc, Ic and z broad-bands, in H-alpha and in two medium-band filters centered at 856 and 914 nm. We select PMS star and young BD candidates using colour-magnitude diagrams (CMDs) and theoretical isochrones reproduced ad-hoc for the WFI at the ESO2.2m telescope system. The selection criteria are also reinforced by using the previously known PMS stars in Cha II to define the PMS locus on the CMDs and by investigating the infrared (IR) colours of the candidates. By exploiting the WFI intermediate-band photometry we also estimate the effective temperature and the level of H-alpha emission of the candidates. Our survey, which is one of the largest and deepest optical surveys conducted so far in Cha II, recovered the majority of the PMS stars and 10 member candidates of the cloud from previous IR surveys. In addition, the survey revealed 10 new potential members. From our photometric characterisation, we estimate that some 50% of the 20 candidates will result in true Cha II members. Based on our temperature estimates, we conclude that several of these objects are expected to be sub-stellar and give a first estimate of the fraction of sub-stellar objects.
description: 26 pages, 18 figures
Disk Masses and Dust Evolution of Protoplanetary Disks Around Brown Dwarfs
Creators: name: Rilinger, Anneliese M.
name: Espaillat, Catherine C.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We present the largest sample of brown dwarf (BD) protoplanetary disk spectral energy distributions modeled to date. We compile 49 objects with ALMA observations from four star-forming regions: $ρ$ Ophiuchus, Taurus, Lupus, and Upper Scorpius. Studying multiple regions with various ages enables us to probe disk evolution over time. Specifically, from our models we obtain values for dust grain sizes, dust settling, and disk mass; we compare how each of these parameters vary between the regions. We find that disk mass decreases with age. We also find evidence of disk evolution (i.e., grain growth and significant dust settling) in all four regions, indicating that planet formation and disk evolution may begin to occur at earlier stages. We generally find these disks contain too little mass to form planetary companions, though we cannot rule out that planet formation may have already occurred. Finally, we examine the disk mass -- host mass relationship and find that BD disks are largely consistent with previously-determined relationships for disks around T Tauri stars.
description: preprint includes 31 pages, 15 figures. Accepted to ApJ June 28, 2021
Generalized parton distributions in a meson cloud model
Creators: name: Pasquini, B.
name: Boffi, S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present a model calculation of the generalized parton distributions where the nucleon is described by a quark core surrounded by a mesonic cloud. In the one-meson approximation, we expand the Fock state of the physical nucleon in a series involving a bare nucleon and two-particle, meson-baryon, states. We discuss the role of the different Fock-state components of the nucleon by deriving a convolution formalism for the unpolarized generalized parton distributions, and showing predictions at different kinematics.
description: 7 pages, 3 figures; Invited talk at the Fifth International Conference on Perspectives in Hadronic Physics, Miramare - Trieste (Italy), 22-26 May 2006
In-medium $k$-body reduction of $n$-body operators
Creators: name: Frosini, Mikael
name: Duguet, Thomas
name: Bally, Benjamin
name: Beaujeault-Taudière, Yann
name: Ebran, Jean-Paul
name: Somà, Vittorio
Publisher: name: arXiv
Year: 2021
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The computational cost of ab initio nuclear structure calculations is rendered particularly acute by the presence of (at least) three-nucleon interactions. This feature becomes especially critical now that many-body methods aim at extending their reach beyond mid-mass nuclei. Consequently, state-of-the-art ab initio calculations are typically performed while approximating three-nucleon interactions in terms of effective, i.e. system-dependent, zero-, one- and two-nucleon operators. While straightforward in doubly closed-shell nuclei, existing approximation methods based on normal-ordering techniques involve either two- and three-body density matrices or a symmetry-breaking one-body density matrix in open-shell systems. In order to avoid such complications, a simple, flexible, universal and accurate approximation technique involving the convolution of the initial operator with a sole symmetry-invariant one-body matrix is presently formulated and tested numerically. Employed with a low-resolution Hamiltonian, the novel approximation method is shown to induce errors below $2-3\%$ across a large range of nuclei, observables and many-body methods.
description: 31 pages, 14 figures
Hole theory and Quantum Electrodynamics in an unknown French manuscript by Ettore Majorana
Creators: name: Esposito, S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: History and Philosophy of Physics (physics.hist-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Popular Physics (physics.pop-ph)
subject: FOS: Physical sciences

description: We give an accurate historical and scientific account of a previously unknown manuscript written by Ettore Majorana in French. The retrieved text deals with Quantum Electrodynamics by using the formalism of field quantization, and it is here reported, for the first time, in translation. It is likely related to an invited talk for a conference at Leningrad (or Kharkov) in 1933 (or 1934) which, however, Majorana never attended. Probably this manuscript refers to the last missing papers of the ``Senatore folder'', given by Majorana to one student of his at the University of Naples in 1938, just before his disappearance.
description: 16 pages, latex, amsart
Coincident angle-resolved state-selective photoelectron spectroscopy of acetylene molecules: a candidate system for time-resolved dynamics
Creators: name: Mandal, Suddhasattwa
name: Gopal, Ram
name: Srinivas, Hemkumar
name: D'Elia, Alessandro
name: Sen, Arnab
name: Sen, Sanket
name: Richter, Robert
name: Coreno, Marcello
name: Bapat, Bhas
name: Mudrich, Marcel
name: Sharma, Vandana
name: Krishnan, Sivarama
Publisher: name: arXiv
Year: 2021
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Atomic and Molecular Clusters (physics.atm-clus)
subject: FOS: Physical sciences

description: The acetylene-vinylidene system serves as a benchmark for investigations of ultrafast dynamical processes where the coupling of the electronic and nuclear degrees of freedom provides a fertile playground to explore the femto- and sub-femto-second physics with coherent extreme-ultraviolet (EUV) photon sources both on the table-top as well as free-electron lasers. We focus on detailed investigations of this molecular system in the photon energy range $19...40$ eV where EUV pulses can probe the dynamics effectively. We employ photoelectron-photoion coincidence (PEPICO) spectroscopy to uncover hitherto unrevealed aspects of this system. In this work, the role of excited states of the $C_{2}H_{2}^{+}$ cation, the primary photoion, is specifically addressed. From photoelectron energy spectra and angular distributions, the nature of the dissociation and isomerization channels is discerned. Exploiting the $4π$-collection geometry of velocity map imaging spectrometer, we not only probe pathways where the efficiency of photoionization is inherently high but also perform PEPICO spectroscopy on relatively weak channels.
description: 12 pages, 7 figures, 5 tables
Additional file 2 of The preventive efficacy of vitamin B supplements on the cognitive decline of elderly adults: a systematic review and meta-analysis
Creators: name: Li, Shufeng
name: Guo, Yuchen
name: Men, Jie
name: Fu, Hanlin
name: Xu, Ting
Publisher: name: figshare
Year: 2021
Subjects: Medicine
Neuroscience
Biotechnology
Science Policy
Mental Health

description: Details of Search Strategy.
Dark sector interactions and the curvature of the Universe in light of Planck's 2018 data
Creators: name: Benetti, Micol
name: Borges, Humberto
name: Pigozzo, Cassio
name: Carneiro, Saulo
name: Alcaniz, Jailson
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We investigate the observational viability of a class of interacting dark energy (iDE) models in the light of the latest Cosmic Microwave Background (CMB), type Ia supernovae (SNe) and SH0ES Hubble parameter measurements. Our analysis explores the assumption of a non-zero spatial curvature, the correlation between the interaction parameter $α$ and the current expansion rate $H_0$, and updates the results reported in \cite{micol}. Initially, assuming a spatially flat universe, the results show that the best-fit of our joint analysis clearly favours a positive interaction, i.e., an energy flux from dark matter to dark energy, with $α\approx 0.2$, while the non-interacting case, $α= 0$, is ruled out by more than $3σ$ confidence level. On the other hand, considering a non-zero spatial curvature, we find a slight preference for a negative value of the curvature parameter, which seems to relax the correlation between the parameters $α$ and $H_0$, as well as between $H_0$ and the normalization of the matter power spectrum on scales of 8$h^{-1}$ Mpc ($σ_8$). Finally, we discuss the influence of considering the SH$0$ES prior on $H_0$ in the joint analyses, and find that such a choice does not change considerably the standard cosmology predictions but has a significant influence on the results of the iDE model.
description: 11 pages, 2 figures
Bose-Einstein condensation and Casimir effect for ideal Bose Gas confined between two slabs
Creators: name: Biswas, Shyamal
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study the Casimir effect for a 3-d system of ideal Bose gas in a slab geometry with Dirichlet boundary condition. We calculate the temperature($T$) dependence of the Casimir force below and above the Bose-Einstein condensation temperature($T_c$). At $T\le T_c$ the Casimir force vanishes as $[\frac{T}{T_c}]^{3/2}$. For $T\gtrsim T_c$ it weakly depends on temperature. For $T\gg T_c$ it vanishes exponentially. At finite temperatures this force for thermalized photons in between two plates has a classical expression which is independent of $\hbar$. At finite temperatures the Casimir force for our system depends on $\hbar$.
description: 4 pages,1 figure
Η μελωδική δομή και η ιστορία του Κανόνα της Κυριακής των Βαΐων στη Ρουμανική μουσική παράδοση
Creators: name: Τζεορτζέσκου, Αδριανός αρχιδιάκονος Ευγένιου
Publisher: name: Aristotle University of Thessaloniki
Year: 2016
Subjects: Κανόνας των Βαΐων
Ρουμανική μουσική
Παράδοση
Palm Sunday Canon
Romanian music
Tradition

description: Η παρούσα εργασία προσπαθεί να γνωστοποιήσει και να περιγράψει ένα ασυνήθιστο μελοποίημα του Κανόνα των Βαΐων, που ανήκει στη Ρουμανική Ψαλτική Παράδοση του 18ου αιώνα, έργο ενός μεγάλου λογίου και λογοτέχνη, του Φιλοθέου Ζήπα ιερομονάχου. Το επιλεγόμενο θέμα των Καταβασιών των Βαΐων είναι αρκετά ευρύ για όποιον ενδιαφέρεται να ερευνήσει την ιστορία του εκκλησιαστικού μέλους στο Ρουμανικό έδαφος. Για το επιστημονικό περιβάλλον των Ελλήνων μουσικολόγων το θεωρώ ως νέα ανακάλυψη ή και ως πρόκληση για περαιτέρω έρευνα. Για την ευρύτερη κατανόηση του ξεχωριστού μουσικού χαρακτήρα του μελοποιήματος αυτού, καθώς και την αναγνώρισή του ως σημαντικού έργου της γραπτής ψαλτικής παράδοσης, έχω συμπεριλάβει διάφορες έρευνες και γνώμες των σπουδαιότερων Ρουμάνων μουσικολόγων των δύο τελευταίων αιώνων πάνω στις πιο δημοφιλείς μουσικές εκδοχές του Κανόνα των Βαΐων στη Ρουμανική μουσική παράδοση, μαζί με την συγκριτική ανάλυση του ασυνήθιστου μέλους του Κανόνα σε κάθε εκδοχή του από τον 18 ο αιώνα ως σήμερα.
description: The present thesis tries to disclose and describe an unusual musical composition of Palm Sunday Canon, belonging to Romanian Chanting Tradition from the 18th century, the work of a great scholar and writer, Philotheou Jipa the hieromonk. The chosen theme of Palm Sunday’s Katabasia is wide enough for anyone interested in researching the history of the church chanting in the Romanian territory. For the scientific environment of Greek musicologists, I regard it as a new discovery or challenge for further investigation. For a wider understanding of the distinctive musical character of this composition, as well as its recognition as an important work of written chanting tradition, I have included several surveys, studies and opinions of the greatest Romanians musicologists of the last two centuries regarding the most popular musical versions of Palm Sunday Canon in Romanian music tradition, together with the comparative analysis of this unusual melody, in its every known version from the 18th century to nowadays.
Trophic factor withdrawal: p38 mitogen-activated protein kinase activates NHE1, which induces intracellular alkalinization
Creators: name: Khaled, Annette R.; Moor, Andrea N.; Li, Aiqun Q.; Kim, Kyungjae; Ferris, Douglas K.; Muegge, Kathrin; Fisher, Robert J.; Fliegel, Larry; Durum, Scott K.
Publisher: name: University of Alberta Libraries
Year: 2001

Abstract
Field Equations of Massless Fields in the New Interpretation of the Matrix Model
Creators: name: Furuta, Ko
name: Hanada, Masanori
name: Kawai, Hikaru
name: Kimura, Yusuke
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Recently, some of the authors have introduced a new interpretation of matrix models in which covariant derivatives on any curved space can be expressed by large-N matrices. It has been shown that the Einstein equation follows from the equation of motion of IIB matrix model in this interpretation. In this paper, we generalize this argument to covariant derivatives with torsion. We find that some components of the torsion field can be identified with the dilaton and the $B$-field in string theory. However, the other components do not seem to have string theory counterparts. We also consider the matrix model with a mass term or a cubic term, in which the equation of motion of string theory is exactly satisfied.
description: 21 pages
Amplitude Nanofriction Spectroscopy
Creators: name: Lainé, Antoine
name: Vanossi, Andrea
name: Niguès, Antoine
name: Tosatti, Erio
name: Siria, Alessandro
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Atomic scale friction, an indispensable element of nanotechnology, requires a direct access to, under actual growing shear stress, its successive live phases: from static pinning, to depinning and transient evolution, eventually ushering in steady state kinetic friction. Standard tip-based atomic force microscopy generally addresses the steady state, but the prior intermediate steps are much less explored. Here we present an experimental and simulation approach, where an oscillatory shear force of increasing amplitude leads to a one-shot investigation of all these successive aspects. Demonstration with controlled gold nanocontacts sliding on graphite uncovers phenomena that bridge the gap between initial depinning and large speed sliding, of potential relevance for atomic scale time and magnitude dependent rheology.
Spectral analysis of gluonic pole matrix elements for fragmentation
Creators: name: Gamberg, L. P.
name: Mukherjee, A.
name: Mulders, P. J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The non-vanishing of gluonic pole matrix elements can explain the appearance of single spin asymmetries in high-energy scattering processes. We use a spectator framework approach to investigate the spectral properties of quark-quark-gluon correlators and use this to study gluonic pole matrix elements. Such matrix elements appear in principle both for distribution functions such as the Sivers function and fragmentation functions such as the Collins function. We find that for a large class of spectator models, the contribution of the gluonic pole matrix element in fragmentation functions vanishes. This outcome is important in the study of universality for fragmentation functions and confirms findings using a different approach.
description: 9 pages, 4 figures, added references
X-Cron_Whitepaper_EN_v1.0
Creators: name: Souza Silva, Jaconaazar
Publisher: name: Zenodo
Year: 2025
Subjects: X-Cron
Symbolic currency
Subjective time
Conscious blockchain
Chronons
Hexachronons
XChronos
Soulbound NFTs
Time-based DAOs
Mirror.xyz
Temporal ontology
Semantic economics
Ontological value
Web3 philosophy
Idealist crypto
Decentralized symbolism
Non-financial economy
Polygon network
Meaning-driven tokens
Experiential web

description: This document presents the official whitepaper for X-Cron, a symbolic cryptocurrency rooted in the philosophical system of XChronos. Unlike conventional financial tokens, X-Cron represents subjective time, conscious presence, and symbolic value generated through lived experience and synchronicity. Built on the Polygon blockchain as an ERC-20 token (XCRON), it supports a unique ecosystem that includes soulbound NFTs, symbolic DAOs, and conscious participation mechanisms.

Inspired by the concepts of Crônons (units of lived time), Hexacrônons (resonant symbolic structures), and Metachronos (the reflective layer of temporal experience), X-Cron transforms value from something extracted into something revealed through presence.

This whitepaper outlines the ontological foundations, use cases, governance models, and technological integrations that shape X-Cron as a currency for meaning, not mere transactions. It is intended for thinkers, builders, artists, and seekers who understand that time is not spent, but lived — and that value can arise from the intensity of being.
Additional file 1 of Nitrogen deposition experiment mimicked with NH4NO3 overestimates the effect on soil microbial community composition and functional potential in the Eurasian steppe
Creators: name: Li, Tingting
name: Zhang, Zijia
name: Ma, Yiping
name: Song, Yuqian
name: Yang, Guojiao
name: Han, Xingguo
name: Zhang, Ximei
Publisher: name: figshare
Year: 2022
Subjects: subject: Biochemistry
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: FOS: Biological sciences
subject: Immunology
subject: FOS: Clinical medicine

description: Additional file 1: Table S1. Pairwise PERMANOVA of microbial taxonomic (upper right) and functional (lower left) community composition under different treatments. PERMANOVA: permutational multivariate analysis of variance. Data are the p values.
Additional file 1 of Chronic pain after breast surgery: incidence, associated factors, and impact on quality of life, an observational prospective study
Creators: name: Villa, Gianluca
name: Mandarano, Raffaele
name: Scirè-Calabrisotto, Caterina
name: Rizzelli, Valeria
name: Duca, Martina Del
name: Montin, Diego Pomarè
name: Paparella, Laura
name: A. Raffaele De Gaudio
name: Romagnoli, Stefano
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Biotechnology
subject: Cancer
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences
subject: Hematology

description: Additional file 1: Table S1. BPI score in patients with pain at 3 months.
Συγκριτική αξιολόγηση της αντίστασης στην κυκλική κόπωση δύο συστημάτων μηχανοκίνητων περιστροφικών μικροεργαλείων νικελίου-τιτανίου
Creators: name: Ιντζές, Λάμπρος Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2016
Subjects: κυκλική κόπωση
X7EdfeFile
K3XF
Ni-Ti

description: Η παρούσα μελέτη εξέτασε την αντίσταση στην κυκλική κόπωση δύο διαφορετικών περιστροφικών μηχανοκίνητων μικροεργαλείων Νικελίου - Τιτανίου (Ni-Ti): Του K3XF (Kerr, Orange, CA) και του X7 EdgeFile (EdgeEndo, Albuquerque, New Mexico). Υλικά και μέθοδος: Για τις ανάγκες της παρούσας εργασίας χρησιμοποιήθηκαν 30 μικροεργαλεία (n=30) από τον κάθε τύπο. Και τα δύο εργαλεία είχαν μέγεθος 25 κατά ISO και σταθερή κωνικότητα 4%. Δύο χαλύβδινες ράβδοι με εγκοπή χρησιμοποιήθηκαν για τον περιορισμό του λειτουργικού άκρου του κάθε μικροεργαλείου υπό κάμψη 600 με ακτίνα κάμψης 5 χιλιοστών. Κατόπιν, τα μικροεργαλεία αφέθηκαν να περιστραφούν με ταχύτητα 300 στροφών ανά λεπτό (rpm) μέχρι τη θραύση τους. Ο χρόνος μέχρι τη θραύση καταγράφηκε για κάθε μικροεργαλείο και υπολογίστηκαν οι περιστροφές μέχρι τη θραύση (ΠΜΘ). Για τη στατιστική ανάλυση των αποτελεσμάτων χρησιμοποιήθηκε το πρόγραμμα SPSS 22 software (IBM, Armonk, NY). Αποτελέσματα: Το μικροεργαλείο X7 EdgeFile επέδειξε στατιστικά σημαντικώς ανώτερη αντοχή στην κυκλική κόπωση σε σχέση με το K3XF με μέσους αριθμούς ΠΜΘ 1045.7 ± 311.2 και 359.5 ± 95.6 αντίστοιχα. Συμπέρασμα: Το μικροεργαλείο X7 EdgeFile εμφανίστηκε ανθεκτικότερο στη συνεχή περιστροφή υπό κάμψη συγκρινόμενο με το K3XF, στις ίδιες εργαστηριακές συνθήκες.
description: The present study examined the resistance to cyclic fatigue of two different rotary Ni-Ti instruments: The K3XF (Kerr, Orange, CA) and the X7 EdgeFile (EdgeEndo, Albuquerque, New Mexico). Methods: For the needs of this study thirty instruments (n=30) of each type were used with tip size 25 according to ISO and 0.04 taper. All instruments were constrained to 600 of curvature with a radius of 5 mm by the use of two grooved stainless steel rods and rotated at a speed of 300 rpm. The time until separation was recorded for each of the instruments and the number of cycles to fracture (NCF) was calculated. Statistical analysis was performed using the SPSS 22 software (IBM, Armonk, NY). Results: The X7 EdgeFile instrument showed significantly greater resistance to cyclic fatigue when compared to the K3XF with mean NCF for each instrument 1045.7 ± 311.2 and 359.5 ± 95.6 respectively. Conclusion: The X7 EdgeFile Ni-Ti file appears to be significantly more resistant to fracture, due to flexural fatigue, than the K3XF.
Kinematic Structure of Merger Remnants
Creators: name: Cox, T. J.
name: Dutta, Suvendra N.
name: Di Matteo, Tiziana
name: Hernquist, Lars
name: Hopkins, Philip F.
name: Robertson, Brant
name: Springel, Volker
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We use numerical simulations to study the kinematic structure of remnants formed from mergers of equal-mass disk galaxies. In particular, we show that remnants of dissipational mergers, which include the radiative cooling of gas, star formation, feedback from supernovae, and the growth of supermassive black holes, are smaller, rounder, have, on average, a larger central velocity dispersion, and show significant rotation compared to remnants of dissipationless mergers. The increased rotation speed of dissipational remnants owes its origin to star formation that occurs in the central regions during the galaxy merger. We have further quantified the anisotropy, three-dimensional shape, minor axis rotation, and isophotal shape of each merger remnant, finding that dissipational remnants are more isotropic, closer to oblate, have the majority of their rotation along their major axis, and are more disky than dissipationless remnants. Individual remnants display a wide variety of kinematic properties. A large fraction of the dissipational remnants are oblate isotropic rotators. Many dissipational, and all of the dissipationless, are slowly rotating and anisotropic. The remnants of gas-rich major mergers can well-reproduce the observed distribution of projected ellipticities, rotation parameter (V/σ)*, kinematic misalignments, Psi, and isophotal shapes. The dissipationless remnants are a poor match to this data. Our results support the merger hypothesis for the origin of low-luminosity elliptical galaxies provided that the progenitor disks are sufficiently gas-rich, however our remnants are a poor match to the bright ellipticals that are slowly rotating and uniformly boxy.
description: 22 pages, 17 figures, accepted to ApJ
Using thermo-optical nonlinearity to robustly separate absorption and radiation losses in nanophotonic resonators
Creators: name: Wang, Mingkang
name: Perez-Morelo, Diego J.
name: Aksyuk, Vladimir
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Low-loss nanophotonic resonators have been widely used in fundamental science and applications thanks to their ability to concentrate optical energy. Key for resonator engineering, the total intrinsic loss is easily determined by spectroscopy, however, quantitatively separating absorption and radiative losses is challenging. While the concentrated heat generated by absorption within the small mode volume results in generally unwanted thermo-optical effects, they can provide a way for quantifying absorption. Here, we propose and experimentally demonstrate a technique for separating the loss mechanisms with high confidence using only linear spectroscopic measurements. We use the optically measured resonator thermal time constant to experimentally connect the easily-calculable heat capacity to the thermal impedance, needed to calculate the absorbed power from the temperature change. We report the absorption, radiation, and coupling losses for ten whispering-gallery modes of three different radial orders on a Si microdisk. Similar absorptive loss rates are found for all the modes, despite order-of-magnitude differences in the total dissipation rate due to widely differing radiation losses. Measuring radiation losses of many modes enables distinguishing the two major components of radiation loss originating from scattering and leakage. The all-optical characterization technique is applicable to any nanophotonic resonators subject to thermo-optical effects.
Optimal Dyck reachability for data-dependence and alias analysis
Creators: name: Chatterjee, Krishnendu
name: Choudhary, Bhavya
name: Pavlogiannis, Andreas
Publisher: name: IST Austria
Year: 2017
Subjects: 000 Computer science, knowledge & general works

description: A fundamental algorithmic problem at the heart of static analysis is Dyck reachability. The input is a graphwhere the edges are labeled with different types of opening and closing parentheses, and the reachabilityinformation is computed via paths whose parentheses are properly matched. We present new results for Dyckreachability problems with applications to alias analysis and data-dependence analysis. Our main contributions,that include improved upper bounds as well as lower bounds that establish optimality guarantees, are asfollows:First, we consider Dyck reachability on bidirected graphs, which is the standard way of performing field-sensitive points-to analysis. Given a bidirected graph withnnodes andmedges, we present: (i) an algorithmwith worst-case running timeO(m+n·α(n)), whereα(n)is the inverse Ackermann function, improving thepreviously knownO(n2)time bound; (ii) a matching lower bound that shows that our algorithm is optimalwrt to worst-case complexity; and (iii) an optimal average-case upper bound ofO(m)time, improving thepreviously knownO(m·logn)bound.Second, we consider the problem of context-sensitive data-dependence analysis, where the task is to obtainanalysis summaries of library code in the presence of callbacks. Our algorithm preprocesses libraries in almostlinear time, after which the contribution of the library in the complexity of the client analysis is only linear,and only wrt the number of call sites.Third, we prove that combinatorial algorithms for Dyck reachability on general graphs with truly sub-cubic bounds cannot be obtained without obtaining sub-cubic combinatorial algorithms for Boolean MatrixMultiplication, which is a long-standing open problem. Thus we establish that the existing combinatorialalgorithms for Dyck reachability are (conditionally) optimal for general graphs. We also show that the samehardness holds for graphs of constant treewidth.Finally, we provide a prototype implementation of our algorithms for both alias analysis and data-dependenceanalysis. Our experimental evaluation demonstrates that the new algorithms significantly outperform allexisting methods on the two problems, over real-world benchmarks.