cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Η Θεωρία της Δικαιοσύνης: Οι αρχές της ελευθερίας και της ισότητας και η προβληματική της δημοκρατίας στον John Rawls:
Creators: name: Νάνου, Σάννα Αριστείδη
Publisher: name: Aristotle University of Thessaloniki
Year: 2011
Subjects: Ελευθερία
Ισότητα
Πρωταρχική θέση
Πέπλο άγνοιας
Δικαιοσύνη ως ακριβοδικία
Πολιτικός φιλελευθερισμός
Liberty
Equality
Original position
Veil of ignorance
Justice as fairness
Political liberalism

description: Ο σκοπός της διπλωματικής εργασίας συνοψίζεται στην εξέταση των αρχών της ελευθερίας και της ισότητας στο πλαίσιο της Θεωρίας της Δικαιοσύνης του Rawls και στο ζήτημα της πολιτικής δημοκρατίας όπως αυτό τίθεται στην προβληματική του. Όπως προκύπτει από την ανάλυση ο Rawls κινείται στο πλαίσιο του εξισωτικού φιλελευθερισμού που αυτό προϋποθέτει την οικονομία της αγοράς και συνεπώς την κοινωνική ανισότητα. Τελικά, ο φιλόσοφος υπερασπίζεται εκείνο το είδος της πολιτικής δημοκρατίας που δεν υπερβαίνει.
description: The aim of this postgraduate thesis is summarized in the review of the principles of liberty and equality through Rawls’s work A Theory of Justice and in the question of political democracy. The result of the analysis, is that Rawls affirms liberal equalitarianism that presupposes the market economy and the social inequality. Finally, the philosopher defends on the type of political democracy that does not exceed the questioning of deliberative democracy.
Pumping of OH Main-Line Masers in Star-Forming Regions
Creators: name: Gray, M. D.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Pumping routes of masers can in principle be recovered from a small matrix of master equations, at an advanced stage of elimination, by tracing back the coefficients to a set of unmodified all-process rate coefficients, drawn from those which appeared in the original set of master equations, prior to any elimination operations. The traceback is achieved by logging the operations carried out on each coefficient. There is no guarantee that a pumping scheme can be represented as a small set of important routes in this way. In the present work, the traceback method is applied to a model which is typical of a large volume of parameter space which produces very strong inversions in the main lines of the rotational ground state of OH, at 1665- and 1667-MHz. For both lines, the pumping scheme is largely restricted to the $^{2}Π_{3/2}$ stack of rotational levels, and it is possible to list a comparatively small set of routes (less than ten) which provide more than 80 per cent of the inversion. In both cases, the strongest, and simplest, route consists of a radiative upward stage, to the $^{2}Π_{3/2}, J=5/2$ rotational level, followed by a collisional de-excitation to the rotational ground state.
description: 13 pages, 3 figures, accepted for publication in MNRAS
title: How strong is fisheries-induced selection? A general framework for estimating fisheries-induced selection differentials
Creators: name: Heino, Mikko
name: Ernande, Bruno
name: Matsumura, Shuichi
name: Rijnsdorp, Adriaan
name: Dieckmann, Ulf
Publisher: name: ASC 2014 - Theme session E
Year: 2024
Subjects: Fisheries and aquaculture

description: No abstracts are to be cited without prior reference to the author.There is a need to better understand how strong selection pressures created by fishing are – first at the level of single stocks, but then also more generally – what are the patterns across stocks and different traits? Which kind of stocks
are most at risk? To provide answers, we need tools that make such estimations easy and practical.
Potential model calculations and predictions for heavy quarkonium
Creators: name: Radford, Stanley F.
name: Repko, Wayne W.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We investigate the spectroscopy and decays of the charmonium and upsilon systems in a potential model consisting of a relativistic kinetic energy term, a linear confining term including its scalar and vector relativistic corrections and the complete perturbative one-loop quantum chromodynamic short distance potential. The masses and wave functions of the various states are obtained using a variational technique, which allows us to compare the results for both perturbative and nonperturbative treatments of the potential. As well as comparing the mass spectra, radiative widths and leptonic widths with the available data, we include a discussion of the errors on the parameters contained in the potential, the effect of mixing on the leptonic widths, the Lorentz nature of the confining potential and the possible $c\bar{c}$ interpretation of recently discovered charmonium-like states.
description: Physical Review published version
UV spectroscopy confirms SU Lyn to be a symbiotic star
Creators: name: Kumar, Vipin
name: Srivastava, Mudit K.
name: Banerjee, Dipankar P. K.
name: Joshi, Vishal
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: SU Lyn, a star that ostensibly appears to be an unremarkable late M type giant, has recently been proposed to be a symbiotic star largely based on its hard X-ray properties. The star does not display, in low-resolution optical spectra, the high excitation lines typically seen in the spectra of symbiotic stars. In the present work, UV, optical, and near-infrared observations are presented, aimed at exploring and strengthening the proposed symbiotic classification for this star. Our Far-UV 1300-1800$Å$ spectrum of SU Lyn, obtained with the ASTROSAT mission's UVIT payload, shows emission lines of Si IV, C IV, OIII and N III in a spectrum typical of symbiotic stars. The UV spectrum robustly confirms SU Lyn's symbiotic nature. The detection of high excitation lines in a high-resolution optical spectrum further consolidates its symbiotic nature. As is being recognized, the potential existence of other similar symbiotic systems could significantly impact the census of symbiotic stars in the galaxy.
description: Accepted for publication in MNRAS-Letters
Upgrading aerated lagoons for the treatment of egg processing wastewater
Creators: name: Olsson, Michael Paul
Publisher: name: University of British Columbia
Year: 2009

description: The treatment of egg processing wastewater is typically accomplished in an aerated lagoon. However, to meet current wastewater guidelines, processing facilities must upgrade their systems. Without changing the dimensions of the system and without installing liquid-solid separation, upgrading to an sequencing batch reactor system is an attractive alternative. For this reason, two parallel lab-scale SBR systems were operated over an eight month period for the treatment of egg processing wastewater. The results showed very good removals of BOD, COD, and TSS. Aeration requirements were found to be 1.5 L/min for a single 4 litre reactor and 1.5 L/min & 0.5 L/min for two 4 litre reactors in series. K[sub L]a values of 5.0 hr⁻¹ and 10.8 hr⁻¹ were established for egg processing wastewater and clean water, respectively. Values for α and β were determined to be 0.46 and 0.97, respectively. The coefficients a', and b', for the determination of oxygen requirements, were established at 0.68 g O₂/g BOD and 0.36 d⁻¹, respectively. The kinetic growth coefficients were found to be: K[sub s] = 822 mg/L, k = 1.98 d⁻¹, kd = 0.07 d⁻¹, and Y = 0.32. The reductions in coliforms were from 3500 MPN/100 mis in the influent to 80 MPN/100 mis in the effluent. Confirmed coliforms were identified as Bacillus sp. and Micrococcus sp.. Salmonella and fecal coliforms were absent in both the influent and effluent wastewater.
Dark Matter annihilation in Draco: new considerations of the expected gamma flux
Creators: name: Sanchez-Conde, M. A.
name: Prada, F.
name: Lokas, E. L.
name: Gomez, M. E.
name: Wojtak, R.
name: Moles, M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: A new revision of the gamma flux that we expect to detect in Imaging Atmospheric Cherenkov Telescopes (IACTs) from neutralino annihilation in the Draco dSph is presented in the context of the minimal supersymmetric standard models (MSSM) compatible with the present phenomenological and cosmological constraints, and using the dark matter (DM) density profiles compatible with the latest observations. This revision takes also into account the important effect of the Point Spread Function (PSF) of the telescope, and is valid not only for Draco but also for any other DM target. We show that this effect is crucial in the way we will observe and interpret a possible signal detection. Finally, we discuss the prospects to detect a possible gamma signal from Draco for current or planned gamma-ray experiments, i.e. MAGIC, GLAST and GAW. Even with the large astrophysical and particle physics uncertainties we find that the chances to detect a neutralino annihilation signal in Draco seem to be very scarce for current experiments. However, the prospects for future IACTs with upgraded performances (especially lower threshold energies and higher sensitivities) such as those offered by the CTA project, might be substantially better.
description: 14 pages, 10 figures and 3 tables. Accepted for publication in Physical Review D. Minor changes with respect to the previous version after referee's comments
Relaxation mechanism of GaP grown on 001 Sisubstrates: influence of defects on the growth of AlGaPlayers on GaP/Si templates
Creators: name: Pantzas, Konstantinos
name: Beaudoin, Grégoire
name: Bailly, Myriam
name: Martin, Aude
name: Grisard, Arnaud
name: Dolfi, Daniel
name: Mauguin, Olivia
name: Largeau, Ludovic
name: Sagnes, Isabelle
name: Patriarche, Gilles
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The mechanical stability of commercial GaP/Si templates during thermal an-nealing and subsequent MOCVD growth of GaP and AlGaP is investigated.Although the GaP layer of the template originally presents an excellent surfacemorphology, annealing at high enough temperatures to remove the native oxideprior to growth leads to plastic relaxation, accompanied by a variety of defects,including a dense grid of micro-twins. These micro-twins detrimentally affectGaP and AlGaP layers grown subsequently on the template.
description: 6 figures
Search for direct CP violation in the decays K\pm \to 3π\pm
Creators: name: 2 Collaboration
name: Batley, J. R.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We report a measurement of the direct CP violation asymmetry parameter $A_g$ in charged kaon decays $K^\pm\toπ^\pmπ^+π^-$ by the NA48/2 experiment at the CERN SPS. The experiment has been designed not to be limited by systematics in the asymmetry measurement. Using $1.67\times 10^9$ such decays collected during the 2003 run, the charge asymmetry in the Dalitz plot linear slope parameter $g$ has been measured to be $A_g=(1.7\pm2.9)\times 10^{-4}$. The precision of the result is limited by the statistics used.
description: 14 pages, 5 figures
Shape of population interfaces as an indicator of mutational instability in coexisting cell populations
Creators: name: Castillo, Daniel
name: Lavrentovich, Maxim O.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Biological Physics (physics.bio-ph)
subject: FOS: Physical sciences

description: Cellular populations such as avascular tumors and microbial biofilms may "invade" or grow into surrounding populations. The invading population is often comprised of a heterogeneous mixture of cells with varying growth rates. The population may also exhibit mutational instabilities, such as a heavy deleterious mutation load in a cancerous growth. We study the dynamics of a heterogeneous, mutating population competing with a surrounding homogeneous population, as one might find in a cancerous invasion of healthy tissue. We find that the shape of the population interface serves as an indicator for the evolutionary dynamics within the heterogeneous population. In particular, invasion front undulations become enhanced when the invading population is near a mutational meltdown transition or when the surrounding "bystander" population is barely able to reinvade the mutating population. We characterize these interface undulations and the effective fitness of the heterogeneous population in one- and two-dimensional systems.
Ηλεκτρονικά Ερωτηματολόγια. Η περίπτωση της αξιολόγησης των ελληνικών Πανεπιστημίων:
Creators: name: Βικτωράτος, Ιωσήφ Σπυρίδωνος
Publisher: name: Aristotle University of Thessaloniki
Year: 2011
Subjects: Ηλεκτρονικά ερωτηματολόγια
Αξιολόγηση
Limesurvey
Online surveys
Evaluation process

description: Στην εργασία αυτή πρώτα από όλα μελετήθηκε ο τομέας των ηλεκτρονικών ερευνών με σκοπό την απόκτηση ενός ευρύτερου πλαισίου γνώσεων πάνω στον τομέα αυτόν. Έπειτα ακολούθησε η ενδελεχής μελέτη των διαθέσιμων μεθόδων για ηλεκτρονικές έρευνες. Αφού εξετάστηκαν και μελετήθηκαν κάποιοι δυνατοί τρόποι υλοποίησης ηλεκτρονικών ερευνών, επιλέχθηκε ένα εργαλείο (limesurvey) ως ο καταλληλότερος τρόπος για την υλοποίηση (ηλεκτρονικά) της διαδικασίας της αξιολόγησης στο πανεπιστήμιο. Ύστερα ακολούθησε συστηματική ενασχόληση με το συγκεκριμένο εργαλείο (περιβάλλον, δυνατότητες, λειτουργίες κ.α.).Αυτό το λογισμικό εγκαταστάθηκε στη σχολή προκειμένου να διεξάγεται ηλεκτρονικά η διαδικασία της αξιολόγησης και να συλλέγονται αυτόματα τα αποτελέσματα. Πρώτα λειτούργησε πιλοτικά με επιτυχία για το μάθημα ΕΦΑΡΜΟΣΜΕΝΗ ΠΛΗΡΟΦΟΡΙΚΗ.Η διαδικασία της αξιολόγησης διεξήχθη ηλεκτρονικά και συλλέχθηκαν τα αποτελέσματα για το συγκεκριμένο μάθημα. Τέλος δημιουργήθηκαν πρότυπα ερωτηματολόγια αξιολόγησης για όλα τα μαθήματα.
description: First of all in this work, we studied the field of online surveys in order to gain a broader knowledge on this section. Then followed a thorough study of the available methods for online surveys. Having reviewed and studied some possible ways of implementing electronic surveys, a tool (limesurvey) was selected as the most appropriate way of implementing (online) the evaluation process at the university. After that followed a systematic practice with this tool (environment, capabilities , functions, etc.).This software installed at the university, so as the evaluation process to be conducted online and the results to be collected automatically. First tested and worked successfully for the course APPLIED INFORMATICS. The evaluation process was conducted online and the results were collected for this lesson. Finally, standard evaluation questionnaires for all subjects, were created.
Eternal Inflation: The Inside Story
Creators: name: Bousso, Raphael
name: Freivogel, Ben
name: Yang, I-Sheng
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Motivated by the lessons of black hole complementarity, we develop a causal patch description of eternal inflation. We argue that an observer cannot ascribe a semiclassical geometry to regions outside his horizon, because the large-scale metric is governed by the fluctuations of quantum fields. In order to identify what is within the horizon, it is necessary to understand the late time asymptotics. Any given worldline will eventually exit from eternal inflation into a terminal vacuum. If the cosmological constant is negative, the universe crunches. If it is zero, then we find that the observer's fate depends on the mechanism of eternal inflation. Worldlines emerging from an eternal inflation phase driven by thermal fluctuations end in a singularity. By contrast, if eternal inflation ends by bubble nucleation, the observer can emerge into an asymptotic, locally flat region. As evidence that bubble collisions preserve this property, we present an exact solution describing the collision of two bubbles.
description: 17 pages, 12 figures; v2, PRD format
The Feasibility and Flexibility of Selecting Quasars by Variability Using Ensemble Machine Learning Algorithms
Creators: name: Yang, Da-Ming
name: Xie, Zhang-Liang
name: Wang, Jun-Xian
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: In this work we train three decision-tree based ensemble machine learning algorithms (Random Forest Classifier, Adaptive Boosting and Gradient Boosting Decision Tree respectively) to study quasar selection in the variable source catalog in SDSS Stripe 82. We build training and test samples (both containing 1:1 of quasars and stars) using the spectroscopic confirmed sources in SDSS DR14 (including 8330 quasars and 3966 stars). We find that, trained with variation parameters alone, all three models can select quasars with similarly and remarkably high precision and completeness ($\sim$ 98.5% and 97.5%), even better than trained with SDSS colors alone ($\sim$ 97.2% and 96.5%), consistent with previous studies. Through applying the trained models on the variable sources without spectroscopic identifications, we estimate the spectroscopically confirmed quasar sample in Stripe 82 variable source catalog is $\sim$ 93% complete (95% for $m_i<19.0$). Using the Random Forest Classifier we derive the relative importance of the observational features utilized for classifications. We further show that even using one- or two-year time domain observations, variability-based quasar selection could still be highly efficient.
description: 20 pages, 13 figures, accepted to RAA
Προσδιοριστικοί Παράγοντες Αποτελεσματικότητας στο Ελληνικό Τραπεζικό Σύστημα:
Creators: name: Τσουμαρίκα, Ελένη Χαραλάμπους
Publisher: name: Aristotle University of Thessaloniki
Year: 2011
Subjects: αποτελεσματικότητα
τραπεζικό σύστημα
χρηματοοικονομικοί δείκτες
effectiveness
banking system
financing indicators

description: Την τελευταία διετία οι εξελίξεις στην οικονομία της χώρας μας είναι ραγδαίες και έχουν αλλάξει σε μεγάλο βαθμό την καθημερινότητα μας. Η οικονομική κατάσταση βρίσκεται σε ιδιαίτερα δύσκολη θέση και έντονη είναι η ανησυχία για το τι πρόκειται να γίνει στο μέλλον και αν υπάρχουν πλέον περιθώρια βελτίωσης και λύσεις για να ανακάμψει η οικονομία μας. Ο ρόλος των τραπεζών καθίσταται ιδιαίτερα σημαντικός στο σύγχρονο χρηματοοικονομικό περιβάλλον καθώς αυτές έχουν πλέον μετατραπεί σε σύνθετους οργανισμούς παροχής χρηματοοικονομικών υπηρεσιών και σε αυτές βασίζεται ως ένα μέρος και η εύρυθμη λειτουργία της οικονομίας μας. Για το λόγο αυτό, ο βαθμός αποτελεσματικότητας τους, ιδιαίτερα στις μέρες μας, είναι πολύ σημαντικός λαμβάνοντας υπόψη την «εύθραυστη» οικονομική κατάσταση της χώρας.Στην παρούσα εργασία λοιπόν, η οποία πραγματοποιείται υπό την επίβλεψη της κας. Κοσμίδου Κ., επίκουρη καθηγήτρια του Τμήματος Οικονομικών Επιστημών, επιχειρούμε μέσα από το υπόβαθρο του μαθήματος «Χρηματοοικονομική Ανάλυση και Θεωρία Χαρτοφυλακίου», που έχουμε διδαχτεί, αλλά και γενικότερη έρευνα να αναλύσουμε τους προσδιοριστικούς παράγοντες αποτελεσματικότητας του ελληνικού τραπεζικού συστήματος.
description: The last two years the changes in the economy of our country are rapid and have changed to a great degree our everyday routine. The economic situation is found in particularly difficult place and intense is the concern for what it will become in the future and if there is any chance of improvement and solutions in order to recover our economy. The role of banks is rendered particularly important in the modern financing environment while they have been changed in complex organisms of benefit of financing services and also the order operation of our economy is based in them, too. For this reason, their degree of effectiveness, particularly in our days, is very important taking into consideration the “fragile” economic situation of country. In the present work therefore, which is realised under the supervision of Mrs. Kosmidou, professor of department of economic sciences, we attempt through the background of course “Financing Analysis and Theory of Portfolio”, which we have been taught, but also with more general research to analyze the defining factors of effectiveness of Greek banking system.
Invariance property in inhomogeneous scattering media with refractive-index mismatch
Creators: name: Tommasi, Federico
name: Fini, Lorenzo
name: Martelli, Fabrizio
name: Cavalieri, Stefano
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optics (physics.optics)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: The mean path length invariance property is a very important property of scattering media illuminated by an isotropic and homogeneous radiation. Here we investigate the case of inhomogeneous media with refractive index mismatch between the external environment and also among their subdomains. The invariance property remains valid by the introduction of a correction, dependent on the refractive index, of the mean path length value. It is a consequence of the stationary solution of the radiative transfer equation in a medium subjected to an isotropic and homogeneous radiance. The theoretical results are in agreement with the reported results for numerical simulations for both the three-dimensional and the two-dimensional media.
Globular Cluster Metallicity Subpopulations in NGC 4472
Creators: name: Strader, Jay
name: Beasley, Michael A.
name: Brodie, Jean P.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Bimodality is a common feature of globular cluster (GC) color distributions in galaxies. Although it is well known that the GC system of the Milky Way is bimodal in metallicity, this has yet to be directly demonstrated for an elliptical galaxy. We use Lick index measurements from the literature to derive metallicities for 47 GCs in the giant Virgo elliptical galaxy NGC 4472. The resulting distribution shows clear evidence for two metallicity subpopulations of GCs.
description: Accepted to AJ, 16 pages, 5 figures
Coulomb barrier creation by means of electronic field emission in nanolayer capacitors
Creators: name: Ilin, Eduard
name: Burkova, Irina
name: Draher, Timothy
name: Colla, Eugene V.
name: Hubler, Alfred
name: Bezryadin, Alexey
Publisher: name: arXiv
Year: 2020
Subjects: subject: Applied Physics (physics.app-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The main mechanism of energy loss in capacitors with nanoscale dielectric films is leakage currents. Using the example of Al-Al2O3-Al, we show that there are two main contributions, namely the cold field emission effect and the hopping conductivity through the dielectric. Our main finding is that an application of a high electric field, ~0.6-0.7 GV/m, causes electrons to penetrate the dielectric. If the temperature is sufficiently low, such electrons become permanently trapped in the dielectric. To achieve a strong charging of the dielectric, the voltage needs to be high enough, so that a field emission occurs from the cathode into the dielectric. Such a strongly charged dielectric layer generates a Coulomb barrier and leads to a suppression of the leakage current. Thus, after the dielectric nanolayer of the capacitor is charged, the field emission and the hopping conductivity are both suppressed, and the hysteresis of the I-V curve disappears. The phenomenon is observed at temperatures up to ~225 K. It would be advantageous to identify insulators in which the phenomenon of the Coulomb barriers persists even up to the room temperature, but at this time it is not known whether such dielectrics exist and/or can be designed.
description: 16 pages, 6 figures
Effect of plant population density and shading on the productivity of beans (Phaseolus vulgaris L.) and beets (Beta vulgaris L.) under intercropping
Creators: name: Muli, Musyimi Benjamin
Publisher: name: University of British Columbia
Year: 2009

description: Intercropping is a common practice throughout the world, but sole cropping systems predominate where advanced production technologies are widely available. The associated species in an intercropping system tend to interfere, mainly through either competition for mutually required resources or release of allelopathic chemicals to the microenvironment. This interference intensifies as the density of each component species increases. An experiment was performed to determine the effect of species population densities and shade on yield and yield components of beans (Phaseolus vulgaris L.) and beets (Beta vulgaris L.). Plants of each species were sown at four densities, in a split-plot randomized complete block design under two light intensity levels (full sun and partial shade). Analysis of variance, yield-density regressions, land equivalent ratios and light absorption-density regressions were used to quantify and interpret the treatment effects. The analysis of variance indicated that yield per plant was significantly reduced by increasing density of each species, and by decreasing light intensity for most of the growth measures. Inverse regression parameter values for most of the yield variables revealed that beet was a stronger competitor than bean. Beet was also found to be more competitive than bean under full sun, but not under shade. Bean dry-matter allocation to leaves, stems and pods was also observed to decrease with increasing bean and beet population densities. An exception to this was the allocation to leaves, which was not significantly affected by bean density. Beet density had no significant effect on its dry-matter allocation, but bean density caused significant reduction in beet dry-matter allocation to petioles and storage root. Land equivalent ratios (LER) were approximately equal to 1 indicating neither overyielding nor underyielding. The contribution of bean to LER was always lower than that of beet for all the variables. Light interception was found to increase with species population densities and time. Bean was superior to beet in terms of light interception, which may account for the competitive improvement of bean observed under shade.
[rec. di] P. MENZIO, "Della poesia come amore per il mondo", dell’Orso, 2023
Creators: name: Paltrinieri, Elisabetta
Publisher: name: RiCOGNIZIONI. Rivista di Lingue e Letterature straniere e Culture moderne
Year: 2023

description: [rec. di] P. MENZIO, Della poesia come amore per il mondo, dell’Orso, 2023
description: RiCOGNIZIONI. Rivista di Lingue e Letterature straniere e Culture moderne, Vol. 10 No. 20 (2023)
Virgo cluster early-type dwarf galaxies with the Sloan Digital Sky Survey. III. Subpopulations: distributions, shapes, origins
Creators: name: Lisker, Thorsten
name: Grebel, Eva K.
name: Binggeli, Bruno
name: Glatt, Katharina
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: From a quantitative analysis of 413 Virgo cluster early-type dwarf galaxies (dEs) with Sloan Digital Sky Survey imaging data, we find that the dE class can be divided into multiple subpopulations that differ significantly in their morphology and clustering properties. Three dE subclasses are shaped like thick disks and show no central clustering: (1) dEs with disk features like spiral arms or bars, (2) dEs with central star formation, and (3) ordinary, bright dEs that have no or only a weak nucleus. These populations probably formed from infalling progenitor galaxies. In contrast, ordinary nucleated dEs follow the picture of classical dwarf elliptical galaxies in that they are spheroidal objects and are centrally clustered like E and S0 galaxies, indicating that they have resided in the cluster since a long time, or were formed along with it. These results define a morphology-density relation within the dE class. We find that the difference in the clustering properties of nucleated dEs and dEs with no or only a weak nucleus is not caused by selection biases, as opposed to previously reported suggestions. The correlation between surface brightness and observed axial ratio favors oblate shapes for all subclasses, but our derivation of intrinsic axial ratios indicates the presence of at least some triaxiality. We discuss possible interrelations and formation mechanisms (ram-pressure stripping, tidally induced star formation, harassment) of these dE subpopulations.
description: 12 pages + 9 figures. Accepted for publication in ApJ
Σύνθεση και χαρακτηριχμός εμβολιασμένης χιτοζάνης και επίδραση δικτυωτικών μέσων στη δημιουργία νανοσωματιδίων-εφαρμογή τους στην τεχνολογία φαρμακευτικών σκευασμάτων ως φορείς πρωτεινών:
Creators: name: Παπαδημητρίου, Σοφία Αναστασίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2011
Subjects: νανοσωματίδια
χιτοζάνη
απελευθέρωση δραστικής
nanoparticles
chitosan
drug release

description: Στην παρούσα εργασία σκοπός ήταν η δημιουργία τροποποιημένων νανοσωματιδίων χιτοζάνης ως στοχευμένα συστήματα αποδέσμευσης πρωτεινών. Προκειμένου να παρασκευαστούν φορείς φαρμάκων ικανοί να μην αναγνωρίζονται από το ανοσοποιητικό σύστημα και να μην απομακρύνονται ταχύτατα από την κυκλοφορία, χρησιμοποιήθηκε πολυ(αιθύλενογλυκόλη) δύο διαφορετικών μοριακών βαρών (2000 και 5000), για την χημική τροποποίηση της χιτοζάνης και την δημιουργία εμβολιασμένων υλικών. Τα υλικά που παρασκευάστηκαν χαρακτηρίστηκαν πλήρως και χρησιμοποιήηθηκαν στη συνέχεια για την ενθυλάκωση της πρωτείνης αλβουμίνης. Τα νανοσωματίδια δημιουργήθηκαν με την μέθοδο της ιονικής δικτύωσης χρησιμοποιώντας δύο διαφορετικά δικτυωτικά μέσα το πολυ(τριφωσφορικό οξύ) και το πολυ(γλουταμικό οξύ). Τα νανοσωματίδια που παρασκευάστηκαν επίσης χαρακτηρίστηκαν πλήρως. Επιπλέον μελετήθηκε η in vitro αποδέσμευση της αλβουμίνης. Ο στόχος της παρούσας εργασίας ήταν να διευκρινιστεί πως η διαφορετική αναλογία δικτυωτικού μέσου και υλικού καθώς και το διαφορετικό μοριακό βάρος της πολυ(αιθυλενογλυκόλης) επηρρεάζει τα φυσικοχημικά χαρακτηριστικά των νανοσωματιδίων και να προσδιοριστεί το μέγεθος των νανοσωματιδίων καθώς και η ικανότητα ενθυλάκωσης, η απόδοση σε νανοσωματίδια, η περιεκτικότητα σε δραστική και τέλος η μελέτη του ρυθμού αποδέσμευσης.
description: The main idea of this study is the creation of modified chitosan nanoparticles as targeted drug delivery systems for proteins. During this project, in order to create drug carriers that will not be rapidly eliminate from the blood stream, poly(ethylene glycol), of two different molecular weights is used for the chemical modification of chitosan, creating graft copolymers. The materials produced are fully characterized and used then as drug nanocarriers for the encapsulation of peptide/protein drug such as BSA. Nanoparticles were produced by ionic gelation method using two different cross linking agents, TPP and poly(glutamic acid). The nanoparticles were fully characterized. Moreover the in vitro release of BSA from the nanoparticles is studied. The objectives in the present work have been to identify how the different ratio of materials and crosslinking agent, as well as the different PEG molecular weight affects the physicochemical characteristics of CS-g-PEG/TPP and CS-g-PEG/PGA nanoparticles loaded with BSA, in order to identify and determine BSA encapsulation efficiency, yield, drug loading and study the release profiles.
[rev. of] S. BETTEGA, L. D’ANNA, "Gender and Number Agreement in Arabic", Brill, 2023
Creators: name: Petrantoni, Giuseppe
Publisher: name: RiCOGNIZIONI. Rivista di Lingue e Letterature straniere e Culture moderne
Year: 2023

description: [rev. of] S. BETTEGA, L. D’ANNA, Gender and Number Agreement in Arabic, Brill, 2023
description: RiCOGNIZIONI. Rivista di Lingue e Letterature straniere e Culture moderne, Vol. 10 No. 20 (2023)
Kinetic energy of Bose systems and variation of statistical averages
Creators: name: Yukalov, V. I.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The problem of defining the average kinetic energy of statistical systems is addressed. The conditions of applicability for the formula, relating the average kinetic energy with the mass derivative of the internal energy, are analysed. It is shown that incorrectly using this formula, outside its region of validity, leads to paradoxes. An equation is found for a parametric derivative of the average for an arbitrary operator. A special attention is paid to the mass derivative of the internal energy, for which a general formula is derived, without invoking the adiabatic approximation and taking into account the mass dependence of the potential-energy operator. The results are illustrated by the case of a low-temperature dilute Bose gas.
description: Latex, 11 pages
Gas and Dust Associated with the Strange, Isolated, Star BP Piscium
Creators: name: Zuckerman, B.
name: Melis, C.
name: Song, Inseok
name: Meier, David S.
name: Perrin, Marshall D.
name: Macintosh, Bruce
name: Marois, Christian
name: Weinberger, Alycia J.
name: Rhee, Joseph H.
name: Graham, James R.
name: Kastner, Joel H.
name: Palmer, Patrick
name: Forveille, T.
name: Becklin, E. E.
name: Wilner, D. J.
name: Barman, T. S.
name: Marcy, G. W.
name: Bessell, M. S.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have carried out a multiwavelength observational campaign demonstrating some of the remarkable properties of the infrared-bright variable star BP Psc. Surrounded by a compact dusty, gaseous disk, this little-studied late-G (or early-K) type star emits about 75% of its detected energy flux at infrared wavelengths. Evidence for accretion of gas in conjunction with narrow bi-polar jets and Herbig-Haro objects is apparently consistent with classification of BP Psc as a pre-main sequence star, as postulated in most previous studies. If young, then BP Psc would be one of the nearest and oldest known classical T Tauri stars. However, such an evolutionary classification encounters various problems that are absent or much less severe if BP Psc is instead a luminosity class III post-main sequence star. In this case, it would be the first known example of a first ascent giant surrounded by a massive molecular disk with accompanying rapid gas accretion and prominent jets and HH objects. In this model, the genesis of the massive dusty gaseous disk could be a consequence of the envelopment of a low mass companion star. Properties in the disk may be conducive to the current formation of planets, a gigayear or more after the formation of BP Psc itself.
description: Accepted for Astrophysical Journal New version with minor changes: includes fixing a typo on the 3rd line of the paragraph that follows Equa 4 and adding a new reference (Nordhaus and Blackman 2006)
Far Infrared Spitzer Observations of Elliptical Galaxies: Evidence for Extended Diffuse Dust
Creators: name: Temi, Pasquale
name: Brighenti, Fabrizio
name: Mathews, William G.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Far-infrared Spitzer observations of elliptical galaxies are inconsistent with simple steady state models of dust creation in red giant stars and destruction by grain sputtering in the hot interstellar gas at T ~ 10^7 K. The flux at 24 microns correlates with optical fluxes, suggesting that this relatively hot dust is largely circumstellar. But fluxes at 70 and 160 microns do not correlate with optical fluxes. Elliptical galaxies with similar L_B have luminosities at 70 and 160 microns (L_70 and L_160) that vary over a factor ~ 100, implying an additional source of dust unrelated to that produced by ongoing local stellar mass loss. Neither L_70/L_B nor L_160/L_B correlate with the stellar age or metallicity. Optical line fluxes from warm gas at T ~ 10^4 K correlate weakly with L_70 and L_160, suggesting that the dust may be responsible for cooling this gas. Many normal elliptical galaxies have emission at 70 microns that is extended to 5-10 kpc. Extended far-infrared emission with sputtering lifetimes of ~10^8 yrs is difficult to maintain by mergers with gas-rich galaxies. Instead, we propose that this cold dust is buoyantly transported from reservoirs of dust in the galactic cores which is supplied by mass loss from stars in the core. Intermittent energy outbursts from AGNs can drive the buoyant outflow.
description: 26 pages; Accepted by ApJ
[rec. di] C. ÖHLSCHLÄGER et al. (Hg.), "Narrative des Humanismus in der Weimarer Republik und im Exil", Brill-Fink, 2023
Creators: name: Ramasso, Fabio
Publisher: name: RiCOGNIZIONI. Rivista di Lingue e Letterature straniere e Culture moderne
Year: 2023

description: [rec. di] C. ÖHLSCHLÄGER et al. (Hg.), Narrative des Humanismus in der Weimarer Republik und im Exil, Brill-Fink, 2023
description: RiCOGNIZIONI. Rivista di Lingue e Letterature straniere e Culture moderne, Vol. 10 No. 20 (2023)
Coverage Probability Analysis of IRS-Aided Communication Systems
Creators: name: Cui, Zhuangzhuang
name: Guan, Ke
name: Zhang, Jiayi
name: Zhong, Zhangdui
Publisher: name: arXiv
Year: 2020
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: The intelligent reflective surface (IRS) technology has received many interests in recent years, thanks to its potential uses in future wireless communications, in which one of the promising use cases is to widen coverage, especially in the line-of-sight-blocked scenarios. Therefore, it is critical to analyze the corresponding coverage probability of IRS-aided communication systems. To our best knowledge, however, previous works focusing on this issue are very limited. In this paper, we analyze the coverage probability under the Rayleigh fading channel, taking the number and size of the array elements into consideration. We first derive the exact closed-form of coverage probability for the unit element. Afterward, with the method of moment matching, the approximation of the coverage probability can be formulated as the ratio of upper incomplete Gamma function and Gamma function, allowing an arbitrary number of elements. Finally, we comprehensively evaluate the impacts of essential factors on the coverage probability, such as the coefficient of fading channel, the number and size of the element, and the angle of incidence. Overall, the paper provides a succinct and general expression of coverage probability, which can be helpful in the performance evaluation and practical implementation of the IRS.
Chirality Induced Spin Coherence in Electron Transfer Reactions
Creators: name: Fay, Thomas P.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Recently there has been much interest in the chirality induced spin selectivity effect, whereby electron spin polarisation, which is dependent on the molecular chirality, is produced in electrode-molecule electron transfer processes. Naturally, one might consider if a similar effect can be observed in simple molecular charge transfer reactions, for example in light-induced electron transfer from an electron donor to an electron acceptor. In this work we explore the effect of electron transfer on spins in chiral single radicals and chiral radical pairs using Nakajima-Zwanzig theory. In these cases chirality, in conjuction with spin-orbit coupling, does not lead to spin polarisation, but instead the electron transfer generates quantum coherence between spins states. In principle, this chirality induced spin coherence could manifest in a range of experiments, and in particular we demonstrate that the OOP-ESEEM pulse EPR experiment would be able to detect this effect in oriented radical pairs.
Nonlinear renewal theorems for random walks with perturbations of intermediate order
Creators: name: Nagai, Keiji
name: Zhang, Cun-Hui
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics
subject: 60K05, 60G40, 60K35 (Primary) 62L10 (Secondary)

description: We develop nonlinear renewal theorems for a perturbed random walk without assuming stochastic boundedness of centered perturbation terms. A second order expansion of the expected stopping time is obtained via the uniform integrability of the difference between certain linear and nonlinear stopping rules. An intermediate renewal theorem is obtained which provides expansions between the nonlinear versions of the elementary and regular renewal theorems. The expected sample size of a two-sample rank sequential probability ratio test is considered as the motivating example.
description: Published at http://dx.doi.org/10.1214/074921706000000671 in the IMS Lecture Notes--Monograph Series (http://www.imstat.org/publications/lecnotes.htm) by the Institute of Mathematical Statistics (http://www.imstat.org)
Quantum-enhanced weak absorption estimation with correlated photons
Creators: name: Zhang, Zhucheng
name: Zhang, Xue
name: Liu, Jing
name: Dong, Hui
Publisher: name: arXiv
Year: 2024
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Conventional absorption spectroscopy relies on coherent laser sources, and in turn suffers from the inherent limitation of shot noise, especially in estimating weak absorption. Here we propose a measurement strategy with correlated photons to determine the weak absorption by distinguishing the output with and without photons, dubbed as the on-off measurement. We demonstrate that absorption spectroscopy that incorporates quantum correlations is capable of estimating weak absorption down to a single-photon level, even in noisy environments, achieving a precision comparable to that obtained through 1000 photons in conventional absorption spectroscopy. Our strategy provides a new method to probe fragile systems with weak absorption, avoiding the occurrence of light-induced damage.
description: 6 pages, 3 figures
Phase diagram and Raman Imaging of Grain Growth Mechanisms in Highly Textured Pb(Mg1/3Nb2/3)O3-PbTiO3 Piezoelectric Ceramics
Creators: name: Pham, Mai Thi
name: March, Gregory
name: Colomban, Philippe
Publisher: name: arXiv
Year: 2007
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Pb(Mg1/3Nb2/3)O3-PbTiO3 solid solution (PMN(1-x)-PTx) ceramics with 0
Inflation over the hill
Creators: name: Tzirakis, Konstantinos
name: Kinney, William H.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We calculate the power spectrum of curvature perturbations when the inflaton field is rolling over the top of a local maximum of a potential. We show that the evolution of the field can be decomposed into a late-time attractor, which is identified as the slow roll solution, plus a rapidly decaying non-slow roll solution, corresponding to the field rolling ``up the hill'' to the maximum of the potential. The exponentially decaying transient solution can map to an observationally relevant range of scales because the universe is also expanding exponentially. We consider the two branches separately and we find that they are related through a simple transformation of the slow roll parameter $η$ and they predict identical power spectra. We generalize this approach to the case where the inflaton field is described by both branches simultaneously and find that the mode equation can be solved exactly at all times. Even though the slow roll parameter $η$ is evolving rapidly during the transition from the transient solution to the late-time attractor solution, the resultant power spectrum is an exact power-law spectrum. Such solutions may be useful for model-building on the string landscape.
description: 11 pages, 1 figure (V3: Version accepted by PRD, title changed by journal)
Surplus Power Tariffs. Boosting renewable investment through fair remuneration (Short version)
Creators: name: Petrick, K.
Publisher: name: Zenodo
Year: 2021
Subjects: PROSEU
prosumers
renewable energy
remuneration
tariffs
policy

description: This paper explains why standardised tariffs for renewable energy generation should continue to play a central role in energy policy. The overall goal is to massively accelerate the uptake of renewables to comply with the Paris Agreement. The demand for new renewable capacity is still not sufficiently incited by the energy markets due to incumbent fossil and nuclear generation and slow electrification of the heat and transport sector. Therefore, policy intervention is still necessary. A New Policy Mix should be envisaged which promotes renewable installations of all system sizes. To that end it is argued that a so-called Surplus Power Tariffs (SPTs) should be introduced for small and medium sized systems. These tariffs would provide a fair remuneration for energy that is not self-consumed or shared. SPT levels would be set just high enough to make minimum viable business case. To achieve a good business case, (joint) self-consumption and energy sharing or further efforts like the provision of systems services will be required. The paper builds on the recent study (Jacobs et al. 2020) and aims to provide additional considerations for the design of the New Policy Mix and the underlying tariff schemes.
description: PROSEU - Prosumers for the Energy Union
AMEGO: Exploring the Extreme Multimessenger Universe
Creators: name: Kierans, Carolyn A.
name: Team, the AMEGO
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The All-sky Medium Energy Gamma-ray Observatory (AMEGO) is a Probe-class mission concept that will provide essential contributions to multimessenger astrophysics in the next decade. AMEGO operates both as a Compton and pair telescope to achieve unprecedented sensitivity between 200 keV and $>$5 GeV. The instrument consists of four subsystems. A double-sided strip silicon Tracker gives a precise measure of the first Compton scatter interaction and tracks of pair-conversion products. A novel CdZnTe Low Energy Calorimeter with excellent position and energy resolution surrounds the bottom and sides of the Tracker to detect the Compton-scattered photons which enhances the polarization and narrow-line sensitivity. A thick CsI High Energy Calorimeter contains the high-energy Compton and pair events. The instrument is surrounded by a plastic anti-coincidence detector to veto the cosmic-ray background. We have performed detailed simulations to predict the telescope performance and are currently building a prototype instrument. The AMEGO prototype, known as ComPair, will be tested at the High Intensity Gamma-Ray Source in 2021, followed by a balloon flight in Fall of 2022. In this presentation we will give an overview of the science motivation, a description of the observatory, and an update of the prototype instrument development.
description: 19 pages, 13 Figures, SPIE conference Astronomical Telescopes and Instrumentation, 14 - 18 December 2020, digital forum
Stochastic Model in the Kardar-Parisi-Zhang Universality With Minimal Finite Size Effects
Creators: name: Ghaisas, S. V.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We introduce a solid on solid lattice model for growth with conditional evaporation. A measure of finite size effects is obtained by observing the time invariance of distribution of local height fluctuations. The model parameters are chosen so that the change in the distribution in time is minimum. On a one dimensional substrate the results obtained from the model for the roughness exponent $α$ from three different methods are same as predicted for the Kardar-Parisi-Zhang (KPZ) equation. One of the unique feature of the model is that the $α$ as obtained from the structure factor $S(k,t)$ for the one dimensional substrate growth exactly matches with the predicted value of 0.5 within statistical errors. The model can be defined in any dimensions. We have obtained results for this model on a 2 and 3 dimensional substrates.
description: 8 pages, 7 figures, accepted in Phys. Rev. E