cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Dark Universe inspired by the Kaluza-Klein gravity and impact on Primordial Gravitational Waves
Creators: name: Jusufi, Kimet
name: Luciano, Giuseppe Gaetano
name: Sheykhi, Ahmad
name: Samart, Daris
Publisher: name: arXiv
Year: 2024
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We explore the potential implications of Kaluza-Klein (KK) gravity in unifying the dark sector of the Universe. Through dimensional reduction in KK gravity, the 5D spacetime framework can be reformulated in terms of a 4D spacetime metric, along with additional scalar and vector fields. From the 4D perspective, this suggests the existence of a tower of particle states, including KK gravitons with spin-0 and spin-1 states, in addition to the massless spin-2 gravitons of general relativity (GR). The key idea in the present paper is the analogy with superconductivity theory. By assuming a minimal coupling between an additional complex scalar field and the gauge field, a "mass" term emerges for the spin-1 gravitons. This, in turn, leads to long-range gravitational effects that could modify Newton's law of gravity through Yukawa-type corrections. Assuming an environment-dependent mass for the spin-1 graviton, near the galactic center the repulsive force from this spin-1 graviton is suppressed by an additional attractive component from Newton's constant corrections, resulting in a Newtonian-like, attraction-dominated effect. In the galaxy's outer regions, the repulsive force fades due to its short range, making dark matter appear only as an effective outcome of the dominant attractive corrections. This approach also explains dark matter's emergence as an apparent effects on cosmological scales while our model is equivalent to the scalar-vector-tensor gravity theory. Finally, we examine the impact of dark matter on the primordial gravitational wave (PGW) spectrum and show that it is sensitive to dark matter effects, providing an opportunity to test this theory through future GW observatories.
description: v3: 15 pages, 4 figures, published in Journal of High Energy Astrophysics
Predicting solar cycle 24 with a solar dynamo model
Creators: name: Choudhuri, Arnab Rai
name: Chatterjee, Piyali
name: Jiang, Jie
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Whether the upcoming cycle 24 of solar activity will be strong or not is being hotly debated. The solar cycle is produced by a complex dynamo mechanism. We model the last few solar cycles by `feeding' observational data of the Sun's polar magnetic field into our solar dynamo model. Our results fit the observed sunspot numbers of cycles 21-23 extremely well and predict that cycle~24 will be about 35% weaker than cycle~23.
description: 10 pages 1 table 3 figures
Proximity full-text searches of frequently occurring words with a response time guarantee
Creators: name: Veretennikov, Alexander B.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Information Retrieval (cs.IR)
subject: FOS: Computer and information sciences

description: Full-text search engines are important tools for information retrieval. In a proximity full-text search, a document is relevant if it contains query terms near each other, especially if the query terms are frequently occurring words. For each word in the text, we use additional indexes to store information about nearby words at distances from the given word of less than or equal to MaxDistance, which is a parameter. A search algorithm for the case when the query consists of high-frequently used words is discussed. In addition, we present results of experiments with different values of MaxDistance to evaluate the search speed dependence on the value of MaxDistance. These results show that the average time of the query execution with our indexes is 94.7-45.9 times (depending on the value of MaxDistance) less than that with standard inverted files when queries that contain high-frequently occurring words are evaluated. This is a pre-print of a contribution published in Pinelas S., Kim A., Vlasov V. (eds) Mathematical Analysis With Applications. CONCORD-90 2018. Springer Proceedings in Mathematics & Statistics, vol 318, published by Springer, Cham. The final authenticated version is available online at: https://doi.org/10.1007/978-3-030-42176-2_37
description: Text overlap with arXiv:1812.07640 in introduction and definitions, the primary content is different
ERICC Technical Brief _ Diversity and Fragmentation of Myanmar Education: Schooling Shaped by Protracted Conflict and Crisis
Creators: name: ERICC Consortium
name: Rinehart, Gray
name: Pherali, Tejendra
name: Chase, Elaine
name: Zaw, Htet Thiha
name: Naing, Thein
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 390201
subject: Education policy

description: This technical brief highlights key findings from a detailed report of a rigorous review of the existing body of research in education in the conflict-affected context of Myanmar: Diversity and Fragmentation of Myanmar Education: Schooling Shaped by Protracted Conflict and Crisis (Rinehart et al, 2024). Myanmar’s history since its independence in 1948 has been characterised predominantly by political instability and violent internal conflicts involving ethnic armed organisations (EAOs) and the Myanmar military. As a result of the 2021 coup, 98% of Myanmar children, including approximately 11.4 million school-aged children, are affected by the ongoing crisis. Over 3.5 million are out-of-school and 6.5 million are experiencing learning deprivation despite attending school (Valenza and Stoff, 2023). Schools have been caught in the conflicts between armed resistance actors and the State Administration Council (SAC) military junta. Moreover, educational provisions have become heavily politicised, often used to serve the ideologies and political visions of different armed groups, making education a victim of political controversies as well as the ongoing violence. There is an urgent need for a robust evidence base to help education providers – and those that support them – navigate the barriers to education and mitigate disruptions to teaching and learning amid ongoing violence. This review draws upon relevant studies conducted since 2000 as well as complementary findings from journalistic writing and key informant interviews conducted in 2024. It organises, describes and analyses the current evidence base for education in Myanmar and identifies evidence gaps for future research. It looks primarily at three educational settings affected by conflict and crisis contexts: non-state ethnic minority education provided by various actors in areas contested by or under the control of different EAOs, operating in parallel to the central state education system;  refugee education provided in the nine refugee camps on the Thailand side of Myanmar’s border, overseen by two ethnic minority refugee committees (Karen and Karenni); and  migrant education in Thailand’s Tak Province, consisting of over 60 learning centres for
Room Temperature Atomic Frequency Comb Memory for Light
Creators: name: Main, D.
name: Hird, T. M.
name: Gao, S.
name: Walmsley, I. A.
name: Ledingham, P. M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We demonstrate coherent storage and retrieval of pulsed light using the atomic frequency comb quantum memory protocol in a room temperature alkali vapour. We utilise velocity-selective optical pumping to prepare multiple velocity classes in the $F=4$ hyperfine ground state of caesium. The frequency spacing of the classes is chosen to coincide with the $F'=4 - F'=5$ hyperfine splitting of the $6^2$P$_{3/2}$ excited state resulting in a broadband periodic absorbing structure consisting of two usually Doppler-broadened optical transitions. Weak coherent states of duration $2\,\mathrm{ns}$ are mapped into this atomic frequency comb with pre-programmed recall times of $8\,\mathrm{ns}$ and $12\,\mathrm{ns}$, with multi-temporal mode storage and recall demonstrated. Utilising two transitions in the comb leads to an additional interference effect upon rephasing that enhances the recall efficiency.
Transport Spectroscopy of a Kondo quantum dot coupled to a finite size grain
Creators: name: Simon, Pascal
name: Salomez, Julien
name: Feinberg, Denis
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We analyse a simple setup in which a quantum dot is strongly connected to a metallic grain or finite size wire and weakly connected to two normal leads. The Kondo screening cloud essentially develops in the strongly coupled grain whereas the two weakly connected reservoirs can be used as transport probes. Since the transport channels and the screening channels are almost decoupled, such a setup allows an easier access to the measure of finite-size Kondo effects.
description: 8 pages, 4 figures, final version
On the combinatorics of hypergeometric functions
Creators: name: Blandín, Héctor
name: Díaz, Rafael
Publisher: name: arXiv
Year: 2006
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: We give a combinatorial interpretation for the hypergeometric functions associated with tuples of rational numbers.
description: 8 pages, Advanced Studies in Contemporary Mathematics, 14 (2007), No. 1, pp. 153-160
Quantum interference between nuclear excitation by electron capture and radiative recombination
Creators: name: Pálffy, Adriana
name: Harman, Zoltán
name: Scheid, Werner
Publisher: name: arXiv
Year: 2007
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We investigate the quantum interference between the resonant process of nuclear excitation by electron capture (NEEC) followed by the radiative decay of the excited nucleus, and radiative recombination (RR). In order to derive the interference cross section, a Feshbach projection operator formalism is used. The electromagnetic field is considered by means of multipole fields. The nucleus is described by a phenomenological collective model and by making use of experimental data. The Fano profile parameters as well as the interference cross section for electric and magnetic multipole transitions in various heavy ions are presented. We discuss the experimental possibility of discerning NEEC from the RR background.
Computing flood probabilities using Twitter: application to the Houston urban area during Harvey
Creators: name: Brangbour, Etienne
name: Bruneau, Pierrick
name: Marchand-Maillet, Stéphane
name: Hostache, Renaud
name: Chini, Marco
name: Matgen, Patrick
name: Tamisier, Thomas
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: In this paper, we investigate the conversion of a Twitter corpus into geo-referenced raster cells holding the probability of the associated geographical areas of being flooded. We describe a baseline approach that combines a density ratio function, aggregation using a spatio-temporal Gaussian kernel function, and TFIDF textual features. The features are transformed to probabilities using a logistic regression model. The described method is evaluated on a corpus collected after the floods that followed Hurricane Harvey in the Houston urban area in August-September 2017. The baseline reaches a F1 score of 68%. We highlight research directions likely to improve these initial results.
description: 5 pages, 1 figure. Published in Proceedings of the 9th International Workshop on Climate Informatics: CI 2019
RNA-seq methodological landscape : the ignored importance of the choice of genome annotations
Creators: name: Simoneau, Joël
name: Dumontier, Simon
name: Gosselin, Ryan
name: Scott, Michelle S.
Publisher: name: F1000 Research Limited
Year: 2019

description: The process of transforming RNA-seq sequencing data into meaningful quantification of gene features can be decomposed in a series of defined steps. Hundreds of different software and several different biological resources exist to fulfill the different steps. Therefore, users must define a set of steps (e.g. trimming, alignment and quantification software, in addition to a genome assembly and annotation) to process RNA-seq datasets. However, users cannot currently rely on an extensive assessment of the importance of every design choices to create their own suitable analysis. Our objective is to characterize the relative importance of each methodological step in RNA-seq on gene quantification. First, the current usage of software, genome and genomic annotation was characterized throughout the literature by performing a methodological review. Second, using different permutations of software and references highlighted by the methodological review, we explored the biases of the steps using statistical approaches. Through a methodological review and statistical analyses of RNA-seq data, we show that the choice of genome annotation not only has the biggest impact of gene quantification, it is also the least well-described design choice in the literature. We believe that the importance of genome annotation in quantification has been underestimated and not thoroughly characterized.
Οικονομικές επιπτώσεις της κλιματικής στη γεωργική παραγωγή: η περίπτωση της Ελλάδας
Creators: name: Καϊμακάμης, Ιωάννης Ελευθερίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2011
Subjects: Κλιματική αλλαγή
Προβλέψεις
Υπόδειγμα ARIMA
Climate change
Time series and forecast
ARIMA model

description: Η παρούσα εργασία εξετάζει το αντίκτυπο της διαφαινόμενης κλιματικής αλλαγής στην γεωργική παραγωγικότητα της Ελλάδας σε επίπεδο χώρας. Χρησιμοποιεί δεδομένα χρονολογικών σειρών που χρονικά καλύπτουν την περίοδο 1977- 2007. Τα αποτελέσματα δείχνουν ότι οι μεταβολές στην θερμοκρασία κυρίως επηρέασαν την αγροτική παραγωγικότητα της Ελλάδας και μάλιστα αποτέλεσαν σημαντικό παράγοντα ο οποίος συσχετίζεται αρνητικά με την Ακαθάριστη Προστιθέμενη Αξία του πρωτογενή τομέα της χώρας. Αναφορικά με την διενέργεια πρόβλεψης με εφαρμογή κατάλληλης μεθοδολογίας και χρησιμοποιώντας ως έτος αναφοράς το 2007 και έτος προβλεπόμενων τιμών το 2017 φαίνετε ότι θα υπάρξει σημαντική μείωση στην Ακαθάριστη Προστιθέμενη Αξία του πρωτογενούς τομέα.
description: This paper examines the impact of climate change on the level of total agricultural product in Greece. Using country data for the period 1977- 2007. The results show that changes in temperature, has been a major determinant of agricultural production in Greece. As for examining the time series and the forecast using as reference the year 2017. To predict future values chosen to use the methodology of ARIMA.
A Degradation Performance Model With Mixed-type Covariates and Latent Heterogeneity
Creators: name: Sun, Xuxue
name: Cai, Wenjun
name: Zhang, Qiong
name: Li, Mingyang
Publisher: name: arXiv
Year: 2021
Subjects: subject: Applications (stat.AP)
subject: FOS: Computer and information sciences

description: Successful modeling of degradation performance data is essential for accurate reliability assessment and failure predictions of highly reliable product units. The degradation performance measurements over time are highly heterogeneous. Such heterogeneity can be partially attributed to external factors, such as accelerated/environmental conditions, and can also be attributed to internal factors, such as material microstructure characteristics of product units. The latent heterogeneity due to the unobserved/unknown factors shared within each product unit may also exists and need to be considered as well. Existing degradation models often fail to consider (i) the influence of both external accelerated/environmental conditions and internal material information, (ii) the influence of unobserved/unknown factors within each unit. In this work, we propose a generic degradation performance modeling framework with mixed-type covariates and latent heterogeneity to account for both influences of observed internal and external factors as well as unobserved factors. Effective estimation algorithm is also developed to jointly quantify the influences of mixed-type covariates and individual latent heterogeneity, and also to examine the potential interaction between mixed-type covariates. Functional data analysis and data augmentation techniques are employed to address a series of estimation issues. A real case study is further provided to demonstrate the superior performance of the proposed approach over several alternative modeling approaches. Besides, the proposed degradation performance modeling framework also provides interpretable findings.
description: 24 pages
One-particle spectral properties of the t-J-$V$ model on the triangular lattice near charge order
Creators: name: Bejas, M.
name: Greco, A.
name: Muramatsu, A.
name: Foussats, A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study the t-J-$V$ model beyond mean field level at finite doping on the triangular lattice. The Coulomb repulsion $V$ between nearest neighbors brings the system to a charge ordered state for $V$ larger than a critical value $V_c$. One-particle spectral properties as self-energy, spectral functions and the quasiparticle weight are studied near and far from the charge ordered phase. When the system approaches the charge ordered state, charge fluctuations become soft and they strongly influence the system leading to incoherent one-particle excitations. Possible implications for cobaltates are given.
description: 11 pages, 11 figures. accepted in Phys. Rev. B (Phys. Rev. B77, (2008))
Energy Expenditure Estimation Through Daily Activity Recognition Using a Smart-phone
Creators: name: De Bois, Maxime
name: Amroun, Hamdi
name: Ammi, Mehdi
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computers and Society (cs.CY)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: This paper presents a 3-step system that estimates the real-time energy expenditure of an individual in a non-intrusive way. First, using the user's smart-phone's sensors, we build a Decision Tree model to recognize his physical activity (\textit{running}, \textit{standing}, ...). Then, we use the detected physical activity, the time and the user's speed to infer his daily activity (\textit{watching TV}, \textit{going to the bathroom}, ...) through the use of a reinforcement learning environment, the Partially Observable Markov Decision Process framework. Once the daily activities are recognized, we translate this information into energy expenditure using the compendium of physical activities. By successfully detecting 8 physical activities at 90\%, we reached an overall accuracy of 80\% in recognizing 17 different daily activities. This result leads us to estimate the energy expenditure of the user with a mean error of 26\% of the expected estimation.
Το έγκλημα της Καθοσίωσης στο Βυζάντιο:
Creators: name: Κατσούλης, Ιωάννης Χρήστου
Publisher: name: Aristotle University of Thessaloniki
Year: 2011
Subjects: Καθοσίωση
Ιεροσυλία
Αυτοκράτορας
High Treason
Sacrilege
Emperor

description: Σκοπός της διατριβής ήταν η μελέτη της νομολογίας και των πηγών, όσον αφορά το έγκλημα της «καθοσίωσης» και το συγγενές με αυτό έγκλημα της ιεροσυλίας στην βυζαντινή αυτοκρατορία. Η Καθοσίωση, έννοια που προέρχεται από την φράση «κατά του οσίου γίγνεσθαι», αφορούσε την στάση κατά της αυτοκρατορικής εξουσίας. Καθιερώθηκε μέσω της lex Iulia maiestatis από την εποχή του Οκταβιανού και κωδικοποιήθηκε στην ιουστινιάνεια νομοθεσία, όπου βρίσκουμε διατάξεις της τόσο στον Κώδικα όσο και στον Πανδέκτη. Υπό τους Ισαύρους το έγκλημα συρρικνώθηκε μόνο στις ενέργειες που αφορούσαν προσβολή του προσώπου του αυτοκράτορα. Οι Μακεδόνες επανέφεραν μεν την ιουστινιάνεια νομοθεσία αλλά το πνεύμα της τροποποίησης της αντικειμενικής υπόστασης του εγκλήματος της «καθοσίωσης» μέσω της νομοθεσίας των Ισαύρων παρέμεινε ενεργό, γεγονός που πέρασε και στην Εξάβιβλο.
description: The aim of the present thesis was the study of the jurisprudence and the sources concerning the crime of "high treason" and the relative crime of sacrilege in the Byzantine Empire. The word "καθοσίωση" (kathosiosis), as the crime of high treason was called in Byzantium, was derived from the phrase "κατά του οσίου γίγνεσθαι", translated as "acting against the holy", which meant acting against the holy person of the emperor. It was established through the lex Iulia maiestatis, which was issued at the time of Octavian Augustus and was codified in the Corpus Juris Civilis by emperor Justinian. We also find clauses describing the cases of the crime in the Digesta and the Codex Justinianus. Under the Isaurian dynasty the description of the crimes shrank to include actions which referred only against the person of the emperor. The Macedonian dynasty restored the legislation of Justinian, but the spirit of the reform of the actus reus of the crime by the Isaurians remained active and passed over to the final law collection of the Byzantine Empire, the Hexabiblos.
Preparing Narrow Velocity Distributions for Quantum Memories in Room-Temperature Alkali Vapours
Creators: name: Main, D.
name: Hird, T. M.
name: Gao, S.
name: Oguz, E.
name: Saunders, D. J.
name: Walmsley, I. A.
name: Ledingham, P. M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Quantum memories are a crucial technology for enabling large-scale quantum networks through synchronisation of probabilistic operations. Such networks impose strict requirements on quantum memory, such as storage time, retrieval efficiency, bandwidth, and scalability. On- and off-resonant ladder protocols on warm atomic vapour platforms are promising candidates, combining efficient high-bandwidth operation with low-noise on-demand retrieval. However, their storage time is severely limited by motion-induced dephasing caused by the broad velocity distribution of atoms comprising the vapour. In this paper, we demonstrate velocity selective optical pumping to overcome this decoherence mechanism. This will increase the achievable memory storage time of vapour memories. This technique can also be used for preparing arbitrarily shaped absorption profiles, for instance, preparing an atomic frequency comb absorption feature.
Elliptical rotation of cavity amplitude in ultrastrong waveguide QED
Creators: name: Koshino, Kazuki
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate optical response of a linear waveguide quantum electrodynamics (QED) system, namely, an optical cavity coupled to a waveguide. Our analysis is based on exact diagonalization of the overall Hamiltonian and is therefore rigorous even in the ultrastrong coupling regime of waveguide QED. Owing to the counter-rotating terms in the cavity-waveguide coupling, the motion of cavity amplitude in the phase space is elliptical in general. Such elliptical motion becomes remarkable in the ultrastrong coupling regime due to the large Lamb shift comparable to the bare cavity frequency. We also reveal that such elliptical motion does not propagate into the output field and present an analytic form of the reflection coefficient that is asymmetric with respect to the resonance frequency.
description: 13 pages, 8 figures
Evidence for a large fraction of Compton-thick quasars at high redshift
Creators: name: Martinez-Sansigre, Alejo
name: Rawlings, Steve
name: Bonfield, David G.
name: Mateos, Silvia
name: Simpson, Chris
name: Watson, Mike
name: Almaini, Omar
name: Foucaud, Sebastien
name: Sekiguchi, Kazuhiro
name: Ueda, Yoshihiro
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Using mid-infrared and radio selection criteria, we pre-select a sample of candidate high-redshift type-2 quasars in the Subaru XMM-Newton Deep Field (SXDF). To filter out starburst contaminants, we use a bayesian method to fit the spectral energy distributions (SEDs) between 24-microns and B-band, obtain photometric redshifts, and identify the best candidates for high-z type-2 quasars. This leaves us with 12 z_phot >= 1.7 type-2 quasar candidates in an area ~0.8 deg^2, of which only two have secure X-ray detections. The two detected sources have estimated column densities N_H~2 & 3x10^27 m^-2, i.e. heavily obscured but Compton-thin quasars. Given the large bolometric luminosities and redshifts of the undetected objects, the lack of X-ray detections suggests extreme absorbing columns N_H >= 10^28 m^-2 are typical. We have found evidence for a population of ``Compton-thick'' high-redshift type-2 quasars, at least comparable to, and probably larger than the type-1 quasar population, although spectroscopic confirmation of their AGN nature is important.
description: 6 pages, 2 colour figures. Accepted by MNRAS. Full resolution version and supplementary figures can be found at: http://www.mpia.de/homes/martinez/publications.html
Statistical analysis of edges and bredges in configuration model networks
Creators: name: Bonneau, Haggai
name: Biham, Ofer
name: Kühn, Reimer
name: Katzav, Eytan
Publisher: name: arXiv
Year: 2020
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: A bredge (bridge-edge) is an edge whose deletion would split the network component on which it resides into two components. Bredges are vulnerable links that play an important role in network collapse processes, which may result from node or link failures, attacks or epidemics. Therefore, the abundance and properties of bredges affect the resilience of the network. We present analytical results for the statistical properties of bredges in configuration model networks. Using a generating function approach based on the cavity method, we calculate the probability $\hat P(e\in{\rm B})$ that a random edge e in a configuration model network with degree distribution P(k) is a bredge (B). We also calculate the joint degree distribution $\hat P(k,k'|{\rm B})$ of the end-nodes of a random bredge. We examine the distinct properties of bredges on the giant component (GC) and on the finite tree components (FC) of the network. On the finite components all the edges are bredges and there are no degree-degree correlations. We calculate the probability $\hat P(e\in{\rm B}|{\rm GC})$ that a random edge on the giant component is a bredge. We also calculate the joint degree distribution $\hat P(k,k'|{\rm B},{\rm GC})$ of the end-nodes of bredges and the joint degree distribution $\hat P(k,k'|{\rm NB},{\rm GC})$ of the end-nodes of non-bredge (NB) edges on the giant component. Surprisingly, it is found that the degrees k and k' of the end-nodes of bredges are correlated, while the degrees of the end-nodes of NB edges are uncorrelated. We thus conclude that all the degree-degree correlations on the giant component are concentrated on the bredges. We calculate the covariance of end-nodes of bredges and show it is negative, namely bredges tend to connect high degree nodes to low degree nodes. The implications of the results are discussed in the context of common attack scenarios and dismantling processes.
description: 27 pages, 14 figures. arXiv admin note: text overlap with arXiv:1806.04591
Το αυτονομιστικό κίνημα στη Βόρεια Ήπειρο (1914):
Creators: name: Ιακωβίδης, Σάββας Χαράλαμπου
Publisher: name: Aristotle University of Thessaloniki
Year: 2011
Subjects: Αυτονομιστικό κίνημα
Βόρεια Ηπειρος
Πρωτόκολλο της Κέρκυρας
Separatist movement
Northern Epirus
Protocol of Corfu

description: Με το Πρωτόκολλο της Φλωρεντίας (17 Δεκεμβρίου1913) η Β. Ήπειρος παραχωρήθηκε στο νεοσύστατο κράτος της Αλβανίας με διπλωματικές ενέργειες της Αυστροουγγαρίας, Γαλλίας, Ιταλίας, Γερμανίας, Μ. Βρετανίας και Ρωσίας. Η Ελλάδα αντέδρασε, ενώ οι κάτοικοι της Β. Ηπείρου ανακήρυξαν την αυτονομίας τους (15 Φεβρουαρίου 1914) στο Αργυρόκαστρο και άρχισαν ένοπλο αγώνα κατά των τοπικών αλβανικών αρχών, υπό τον Γεώργιο Χρηστάκη Ζωγράφο, τους μητροπολίτες Βασίλειο και Σπυρίδωνα (Δρυϊνουπόλεως και Βελλάς και Κονίτσης αντίστοιχα, ο οποίος αργότερα αναγορεύθηκε Αρχιεπίσκοπος Αθηνών και Πάσης Ελλάδος). Με το Πρωτόκολλο της Κέρκυρας (17 Μαΐου 1914) είχε αναγνωριστεί θρησκευτική, εκπαιδευτική και διοικητική αυτονομία στις περιοχές Αργυροκάστρου και Κορυτσάς, την εφαρμογή του οποίου εμπόδισε ο Α’ Π.Π. και η Ιταλία. Με το Πρωτόκολλο της Φλωρεντίας (27 Ιανουαρίου 1925) υπογεγραμμένο από τις Μ. Βρετανία, Γαλλία και Ιταλία παγιώθηκε το προηγούμενο Πρωτόκολλο της Φλωρεντίας (17 Δεκεμβρίου 1913).
description: Under the Protocol of Florence (17 December 1913) Northern Epirus was ceded to the newly established Albanian state through diplomatic actions taken by Aystria- Hungary, France, Italy, Germany, the United Kingdom and Russia. Greece opposed the cession, while the inhabitants of Northern Epirus declared their autonomy (15 February 1914) in Argyrokastro(n) and commenced armed struggle against the local Albanian authorities under the leadership of Georgios Christakis Zografos, the Metropolitan bishop Vasileios of Dryinoupolis and the Metropolitan bishop Spyridon of Vella and Konitsa (later elected Archbishop of Athhens and All Greece). Under the Protocol of Corfu (17 May 1914) the provinces of Argyrokastro(n) and Korytsa were granted religious, educatonial and administrative autonomy; nevertheless, World War 1 and Italy hampered the Protocol’s implementation. Under the Protocol of Florence (27 January 1925), which was signed by the United Kingdom, France and Italy, the previous Protocol of Florence (17 December 1913) was consolidated; the then greek government bore primary responsibility for this development.
What Affects Team Behavior? Preliminary Linguistic Analysis of Communications in the Jazz Repository
Creators: name: Licorish, Sherlock A.
name: MacDonell, Stephen G.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: There is a growing belief that understanding and addressing the human processes employed during software development is likely to provide substantially more value to industry than yet more recommendations for the implementation of various methods and tools. To this end, considerable research effort has been dedicated to studying human issues as represented in software artifacts, due to its relatively unobtrusive nature. We have followed this line of research and have conducted a preliminary study of team behaviors using data mining techniques and linguistic analysis. Our data source, the IBM Rational Jazz repository, was mined and data from three different project areas were extracted. Communications in these projects were then analyzed using the LIWC linguistic analysis tool. We found that although there are some variations in language use among teams working on project areas dedicated to different software outcomes, project type and the mix of (and number of) individuals involved did not affect team behaviors as evident in their communications. These assessments are initial conjectures, however; we plan further exploratory analysis to validate these results. We explain these findings and discuss their implications for software engineering practice.
description: Conference, 8 pages, 3 figures, 2 tables
Are there monojets in high-energy proton-nucleus collisions?
Creators: name: Borghini, Nicolas
name: Gelis, Francois
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study high-energy proton-nucleus collisions within the Colour Glass Condensate framework, and compute the probabilities of having a definite number of scatterings in the nucleus with a momentum transfer larger than a given cut. Various properties of the distribution in the number of multiple scatterings are investigated, and we conclude that events with monojets are very unlikely, except for extreme values of the saturation scale Qs.
description: 4 pages, 4 eps-figures. Talk given at Quark Matter 2006, Shanghai, 14-20 Nov. 2006
Rain rendering for evaluating and improving robustness to bad weather
Creators: name: Tremblay, Maxime
name: Halder, Shirsendu Sukanta
name: de Charette, Raoul
name: Lalonde, Jean-François
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Rain fills the atmosphere with water particles, which breaks the common assumption that light travels unaltered from the scene to the camera. While it is well-known that rain affects computer vision algorithms, quantifying its impact is difficult. In this context, we present a rain rendering pipeline that enables the systematic evaluation of common computer vision algorithms to controlled amounts of rain. We present three different ways to add synthetic rain to existing images datasets: completely physic-based; completely data-driven; and a combination of both. The physic-based rain augmentation combines a physical particle simulator and accurate rain photometric modeling. We validate our rendering methods with a user study, demonstrating our rain is judged as much as 73% more realistic than the state-of-theart. Using our generated rain-augmented KITTI, Cityscapes, and nuScenes datasets, we conduct a thorough evaluation of object detection, semantic segmentation, and depth estimation algorithms and show that their performance decreases in degraded weather, on the order of 15% for object detection, 60% for semantic segmentation, and 6-fold increase in depth estimation error. Finetuning on our augmented synthetic data results in improvements of 21% on object detection, 37% on semantic segmentation, and 8% on depth estimation.
description: 19 pages, 19 figures, IJCV 2020 preprint. arXiv admin note: text overlap with arXiv:1908.10335
Current situation of Medicinal and Aromatic Plants commerce in Greece: Risks and Opportunities:
Creators: name: Μανδραβέλη, Ελένη Ιωάννη
Publisher: name: Aristotle University of Thessaloniki
Year: 2011
Subjects: Αρωματικά και Φαρμακευτικά Φυτά
Εμπόριο
Ελλάδα
Medicinal and aromatic plants
Commerce
Greece

description: Τα Αρωματικά και Φαρμακευτικά Φυτά (ΑΦΦ) χρησιμοποιούνται σε διάφορους τομείς όπως η ιατρική, η διατροφή και η κοσμετολογία. Τα τελευταία χρόνια, λόγω αυξημένης ζήτησης για ΑΦΦ, γίνεται υπερεκμετάλλευση των αυτοφυών πληθυσμών αφού αυτοί αποτελούν την κύρια πηγή φυτικού υλικού, προκαλώντας μείωση της γενετικής ποικιλότητας και καταστροφή των ενδιαιτημάτων. Τα ΑΦΦ είναι αναπόσπαστο κομμάτι της βιοποικιλότητας. Η πρόσφατη ανησυχία για την κατάσταση της αυτοφυούς βλάστησης των ΑΦΦ ειδών, της ποιότητας του εμπορευόμενου φυτικού υλικού όπως επίσης και της εκμετάλλευσης των αγροτικών κοινοτήτων, οδήγησε σε στρατηγικές διατήρησης τόσο σε διεθνές όσο και σε εθνικό επίπεδο. Η Ελλάδα, μία χώρα με μεγάλο αριθμό αυτοφυών φυτικών ειδών, εμπεριεχομένων και των ΑΦΦ, ακολουθεί τις παγκόσμιες προσταγές για διατήρηση. Δυστυχώς, δεν υπάρχει αρκετή πληροφορία ούτε για το εμπόριο αλλά ούτε και για τη χρήση των ΑΦΦ στην Ελλάδα. Η παρούσα Μεταπτυχιακή Διπλωματική Εργασία παρουσιάζει την κατάσταση στο εμπόριο ΑΦΦ σε διεθνές και εθνικό επίπεδο, όπως επίσης και τις δράσεις και τους κανονισμούς που αφορούν στη χρήση και διατήρηση των ΑΦΦ. Σκοπός της είναι να αποδώσει την υπάρχουσα κατάσταση στο εμπόριο των ΑΦΦ στην Ελλάδα. Επιμέρους στόχοι είναι ο προσδιορισμός των κενών στις εμπορικές πρακτικές και η πρόταση μέτρων για αειφορική διαχείριση.
description: From ancient times until now, Medicinal and Aromatic Plants (MAPs) are used for several purposes such as in medicine, in nutrition, in cosmetics, etc. The last decades the demand for MAPs is rising and has led to increased pressure on wild plant populations, the main source of raw material, causing loss of genetic diversity and habitat destruction. MAPs are an integral part of our biodiversity. Recent concern over the alarming situation of the status of wild MAP resources, raw material quality, as well as social exploitation of rural communities leads to conservation strategies and policies at both international and national levels. Greece, with a great amount of native plants, including MAPs, follows the international trends in the MAP sector. Unfortunately, there is no monitoring of the Greek market or the use of MAPs. This study presents the status of MAPs market on international and national level as well as actions and regulations concerning MAPs conservation, trade and use. Its purpose is to determine the current situation of MAPs commerce in Greece. It identifies specific gaps in MAPs commerce practices and proposes measures for sustainable management.
Polythionourethane Thermoset Synthesis via Activation of Elemental Sulfur in an Efficient Multicomponent Reaction Approach
Creators: name: Jonas, Wolf
Publisher: name: Zenodo
Year: 2023

description: For the transition toward a safer and more sustainable production of polymeric materials, new synthetic concepts need to be developed. Herein, we describe a catalytic, solvent-free synthesis approach for novel thionourethane thermoset materials, in which the diisothiocyanate reactant is generated in situ via a sulfurization of isocyanides with elemental sulfur, preventing the exposure and handling of the diisothiocyanate. In this one-pot procedure, castor oil fulfills a dual role: (i) acting as the solvent for the in situ diisothiocyanate synthesis in the first step and (ii) reacting as the polyol component in the subsequent thionourethane thermoset formation. The kinetics of the consecutive two steps were studied in detail via real-time IR measurements, and the thermoset crosslinking step was found to be thermally triggerable after the diisothiocyanate reactant is quantitatively formed, enabling high control over the curing process of the system. Differential scanning calorimetry, thermogravimetric analysis, and rheological measurements were performed to investigate the thermal and mechanical properties of the novel thionourethane thermosets and then compared to analogous polyurethane materials. Our results demonstrate an unprecedented approach for thermoset synthesis via an in situ reagent synthesis, i.e., the generation of isothiocyanates from isocyanides by catalytic activation of elemental sulfur, and subsequent thermally triggerable thermosetting with a polyol, resulting in materials with appealing properties.
Probing the fluctuating magnetic field of Fe-triazole spin-crossover thin-layers with nitrogen-vacancy centers in diamond
Creators: name: Barbosa, Isabel Cardoso
name: Hochdörffer, Tim
name: Wolny, Juliusz A.
name: Lönard, Dennis
name: Johansson, Stefan
name: Gutsche, Jonas
name: Schünemann, Volker
name: Widera, Artur
Publisher: name: arXiv
Year: 2024
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Fe$^{\mathrm{II}}$ spin-crossover (SCO) complexes are materials that change their magnetic properties upon temperature variation, exhibiting a thermal hysteresis. Particularly interesting for magnetic-memory applications are thin layers of SCO complexes, where practical magnetic probing techniques are required. While conventional magnetometry on SCO complexes employs cryogenic temperatures, nitrogen-vacancy (NV) centers are quantum magnetometers that can operate at room temperature with high spatial resolution and magnetic-field sensitivity. In this work, we apply thin layers of Fe-triazole SCO complexes directly onto a single-crystal diamond with shallow NV centers working as magnetic sensors and probe the fluctuating magnetic field. Using temperature-dependent NV-center $T_1$ measurements and a widefield technique, we find that the complexes are paramagnetic in the investigated temperature range from 20 °C to 80 °C. We quantitatively describe the $T_1$ time by a model considering the fluctuating magnetic field of the Fe$^{\mathrm{II}}$ ions. We see signatures of a local change of spin state in the $T_1$ relaxometry data, but structural changes in the SCO material dominate the local magnetic environment of the NV centers. Moreover, we conduct a Hahn echo to measure the $T_2$ time, which contrasts the findings of the $T_1$ times for the SCO complexes. We attribute this to different NV detection sensitivities towards Fe$^{\mathrm{II}}$ and Fe$^{\mathrm{III}}$ of the protocols. Our results on the magnetic properties of SCO materials highlight the capabilities of the NV center as a susceptible sensor for fluctuating magnetic fields. At the same time, a spin switching of the complexes cannot be observed due to the systematic challenges when working on nanometer distances to the SCO thin layers.
description: 6 + 21 figures, 12 + 11 pages
Valuing Evaluation: Methodologies to Bridge Research and Practice
Creators: name: Kaskenpalo, Petteri
name: MacDonell, Stephen G.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: The potential disconnect between research and practice in software engineering (SE) means that the uptake of research outcomes has at times been limited. In this paper we seek to identify research approaches that are rigorous in terms of method but that are also relevant to software engineering practitioners. After considering the correspondence of several approaches to software systems research and practice we recommend a framework for applying grounded theory in SE research, as a means of delivering both robust and useful outcomes.
description: Conference, 7 pages, 2 figures
Microstructure, mechanical properties, corrosion resistance and cytocompatibility of WE43 Mg alloy scaffolds fabricated by laser powder bed fusion for biomedical applications
Creators: name: Li, M.
name: Benn, F.
name: Derra, T.
name: Kroeger, N.
name: Zinser, M.
name: Smeets, R.
name: Molina-Aldareguía, J. M.
name: Kopp, A.
name: LLorca, J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Open-porous scaffolds of WE43 Mg alloy with a body-center cubic cell pattern were manufactured by laser powder bed fusion with different strut diameters. The geometry of the unit cells was adequately reproduced during additive manufacturing and the porosity within the struts was minimized. The microstructure of the scaffolds was modified by means of thermal solution and ageing heat treatments and was analysed in detail by means of X-ray microtomography, optical, scanning and transmission electron microscopy. Moreover, the corrosion rates and the mechanical properties of the scaffolds were measured as a function of the strut diameter and metallurgical condition. The microstructure of the as-printed scaffolds contained a mixture of Y-rich oxide particles and Rare Earth-rich intermetallic precipitates. The latter could be modified by heat treatments. The lowest corrosion rates of 2-3 mm/year were found in the as-printed and solution treated scaffolds and they could be reduced to ~0.1 mm/year by surface treatments using plasma electrolytic oxidation. The mechanical properties of the scaffolds improved with the strut diameter: the yield strength increased from 8 to 40 MPa and the elastic modulus improved from 0.2 to 0.8 GPa when the strut diameter increased from 275 μm to 800 μm. Nevertheless, the strength of the scaffolds without plasma electrolytic oxidation treatment decreased rapidly when immersed in simulated body fluid. In vitro biocompatibility tests showed surface treatments by plasma electrolytic oxidation were necessary to ensure cell proliferation in scaffolds with high surface-to-volume ratio.
title: Why comply? Experimental evidence on the European stability and growth pact’s incentives for member states
Creators: name: Willenbücher, Sarah-Esther Anneliese
Publisher: name: London School of Economics and Political Science (LSE)
Year: 2025

description: The financial, economic and sovereign debt crisis in European Economic and Monetary Union (EMU) fundamentally challenged the purpose and functioning of the Stability and Growth Pact (SGP). Its purpose is to promote sustainable public finances to back the European Central Bank’s goal for monetary stability. The crisis made visible and exacerbated what had already started before the crisis: member states’ governments frequently breached the rules and ran high deficits, and many of these breaches remained without sanctions imposed by the other states in the Council. Given the high number of unsanctioned breaches, why would a member state comply at all? The literature’s accounts of a member state’s ‘decision’ for a breach of the rules (such as a lack of economic or political capacity, a bad economic situation, and political power in the Council) can only explain part of it. This thesis suggests ‘economic policy ideologies’ to be the complementary piece to explain compliance. The SGP was designed in an ordoliberal spirit, but governments’ convictions about what constitutes ‘good’ economic policy may run counter to it. To explore this idea, this thesis contributes to the academic debate by providing a different theoretical, empirical and methodological perspectives: 1) theoretical through considering the SGP as a mechanism to govern a common-pool resource and with economic policy ideology to endorse the rules as ‘appropriate’; 2) empirical through testing competing explanations to better understand how the SGP functions; and, 3) methodological through a novel type of a common-pool-resource experiment which I call ‘cultivation game’ to study the SGP, and which could also serve to study other cases of co-operation. The results show that economic policy ideologies shape compliance, in particular this is mediated through business cycle developments. This can inform ongoing debates about reforming the EMU’s institutional design.
On the conjugacy problem for Carter subgroups
Creators: name: Evgenii, Vdovin
Publisher: name: arXiv
Year: 2006
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20D25, 20E07

description: It is proven in the paper, that Carter subgroups of a finite group are conjugate if Carter subgroups in the group of induced automorphisms for every non-Abelian composition factor are conjugate.
description: To appear in "Siberian Mathematical Journal"
Photon-photon Correlations from a Pair of Strongly Coupled Two-Level Emitters
Creators: name: Darsheshdar, Elnaz
name: Hugbart, Mathilde
name: Bachelard, Romain
name: Villas-Boas, Celso Jorge
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate two-color photon correlations in the light emitted by strongly coupled two-level emitters. Spectral filtering allows us to manipulate the collected light statistics and we show that the resonances induced by dipole-dipole interactions give rise to specific correlations, where the time-symmetry of the correlations is broken. Based on the collective dressed states, our study encompasses both the case of real processes, where the photons are associated with specific resonances and classical correlations between each other, and virtual processes, where pairs of photons are emitted with non-classical correlations.