cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Nucleation of plasmonic resonance nanoparticles
Creators: name: Karpov, Victor G.
name: Nardone, Marco
name: Grigorchuk, Nicholas I.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We predict the electromagnetic field driven nucleation of nanoparticles that provide plasmonic oscillations in resonance with the field frequency. The oscillations assume a phase that maximizes the particle polarization and energy gain due to nucleation. We derive closed form expressions for the corresponding nucleation barrier and particle shape vs. field frequency and strength, metal plasma frequency, conductivity, and the host dielectric permittivity. We show that the plasmonic polarization allows for nucleation of particles that would not be stable in zero field.
description: 5 pages, 3 figures
title: Основы науки о данных с использованием языка Python (введение в Data Science)
Creators: name: ELS IPR BOOKS
Publisher: name: Ай Пи Ар Медиа
Year: 2024

description: В учебном пособии подробно изложены теоретические основы программирования на языке Python. Рассмотрены основные приложения для анализа данных, которые очень часто используются при подготовке данных для алгоритмов машинного обучения. Представлены важнейшие методы анализа исследовательских данных, в том числе основанные на статистической оценке. Для визуализации результатов используются специальные графические пакеты. Основное содержание учебного пособия посвящено предобработке данных и возможности создания новых признаков. Отдельно приведены способы обработки числовых категориальных данных. В качестве базовых алгоритмов машинного обучения рассмотрены модели регрессии, классификации и кластеризации с использованием библиотеки sklearn. Обсуждаются вопросы оптимизации и настройки гиперпараметров модели, позволяющие получить лучшие результаты. Подробно представлены способы сбора и хранения информации с использованием языка Python. Особое внимание уделено вопросам парсинга данных в сети Интернет. В заключительной части подробно рассказано о современной системе контроля версий git. Подготовлено в соответствии с требованиями Федерального государственного образовательного стандарта высшего образования. Предназначено для студентов, аспирантов и преподавателей инженерных и естественно-научных специальностей, интересующихся программированием на языке Python, анализом данных и созданием алгоритмов машинного обучения. Также будет полезно при изучении дисциплин «Основы программирования на Python», «Практикум по компьютерному моделированию» и «Компьютерные технологии в научных исследованиях».
Leveraging Deep Learning Techniques on Collaborative Filtering Recommender Systems
Creators: name: RahmatAbadi, Ali Fallahi
name: Mohammadzadeh, Javad
Publisher: name: arXiv
Year: 2023
Subjects: subject: Information Retrieval (cs.IR)
subject: FOS: Computer and information sciences

description: With the exponentially increasing volume of online data, searching and finding required information have become an extensive and time-consuming task. Recommender Systems as a subclass of information retrieval and decision support systems by providing personalized suggestions helping users access what they need more efficiently. Among the different techniques for building a recommender system, Collaborative Filtering (CF) is the most popular and widespread approach. However, cold start and data sparsity are the fundamental challenges ahead of implementing an effective CF-based recommender. Recent successful developments in enhancing and implementing deep learning architectures motivated many studies to propose deep learning-based solutions for solving the recommenders' weak points. In this research, unlike the past similar works about using deep learning architectures in recommender systems that covered different techniques generally, we specifically provide a comprehensive review of deep learning-based collaborative filtering recommender systems. This in-depth filtering gives a clear overview of the level of popularity, gaps, and ignored areas on leveraging deep learning techniques to build CF-based systems as the most influential recommenders.
description: 24 pages, 14 figures
Η Θεολογία των Ευχών του Βαπτίσματος
Creators: name: Καρατζάς, Ευάγγελος-Ευγένιος Ιωάννη
Publisher: name: Aristotle University of Thessaloniki
Year: 2023
Subjects: Θεολογία
Ευχές
Βάπτισμα
Theology
Prayers
Baptism

description: Ελληνική Περίληψη Σκοπός της παρούσας μεταπτυχιακής διπλωματικής εργασίας είναι η μελέτη των ευχών του αγίου Βαπτίσματος. Το πόνημα διαρθρώνεται σε τρία κεφάλαια. Στο πρώτο από αυτά εξετάζεται η ιστορία που αφορά το εν λόγω ιερό μυστήριο, από τις προτυπώσεις της Βάπτισης στα χρόνια της Παλαιάς Διαθήκης μέχρι τη σύγχρονη εποχή. Στη συνέχεια, παρουσιάζονται οι προβαπτισματικές ευχές ως μέσα πληρέστερης κατανόησης για τις παραπάνω ευχές, ενίοτε με κάποια ανάλυση. Στο δεύτερο κεφάλαιο αναφέρονται η δομή και τα θεολογικά μηνύματα που απορρέουν από τις ευχές του Αγιασμού των υδάτων, του Ελαίου - Χρίσματος, του Μύρου και την ιλαστική του ιερέα, ενώ επεξηγούνται οι συμβολισμοί των ιερών αντικειμένων και σκευών, τα οποία χρησιμοποιούνται, κατά τη διάρκεια του λουτρού της παλιγγενεσίας. Στο τρίτο και τελευταίο κεφάλαιο διαπιστώθηκαν αφενός, η συσχέτιση του Βαπτίσματος και άλλων λειτουργικών ή μυστηριακών πτυχών της Ορθόδοξης Εκκλησίας με τη Σταύρωση και την Ανάσταση του Χριστού και αφετέρου, οι θέσεις ορισμένων νεότερων πατέρων, του αγίου Νεκταρίου, του πρωτοπρεσβυτέρου Αλεξάνδρου Σμέμαν και του πατέρα Δημητρίου Στανιλοάε, περί της Συσταύρωσης και της Συνανάστασης του βαπτιζόμενου με τον Κύριο. Τέλος, παρατίθενται τα συμπεράσματα και η βιβλιογραφία της εργασίας.
description: The aim of the present thesis is the study of the prayers in Holy Baptism. It is written in three chapters. Firstly, the history, which deals with this holy sacrament, generally, is examined, from the the years of the Old Testament until the modern era. Also, the “prebaptismal” wishes are presented as means of further understanding for the above prayers and most of them are included with analysis. In the second chapter, the structure and the theological messages from the wishes of the Consecration of water, the Oil - Anointing, the Myrrh and the priest's expiation are mentioned. Additionally, the symbolisms of the sacred objects and utensils, which are used during the Baptism, are explained. In the third and last chapter, the correlation of Baptism and other liturgical or sacramental aspects of the Orthodox Church with the Crucifixion and Resurrection of Christ has been clarified. Furthermore, the opinions of some contemporary fathers, Saint Nektarios, Archpriest Alexander Schmeman and Father Dimitrios Staniloae, are established. More precisely, they spoke about the above correlation in terms of the relationship between the baptized person and Lord. Finally, the conclusions and the bibliography of this task are listed.
Vortex soliton tori with multiple nested phase singularities in dissipative media
Creators: name: Borovkova, Olga V.
name: Lobanov, Valery E.
name: Kartashov, Yaroslav V.
name: Torner, Lluis
Publisher: name: arXiv
Year: 2012
Subjects: subject: Optics (physics.optics)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: We show the existence of stable two- and three-dimensional vortex solitons carrying multiple, spatially separated, single-charge topological dislocations nested around a vortex-ring core. Such new nonlinear states are supported by elliptical gain landscapes in focusing nonlinear media with two-photon absorption. The separation between the phase dislocations is dictated mostly by the geometry of gain landscape and it only slightly changes upon variation of the gain or absorption strength.
description: 17 pages, 5 figures, to appear in Physical Review A
Fidelity estimation between two finite ensembles of unknown pure equatorial qubit states
Creators: name: Siomau, Michael
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Suppose, we are given two finite ensembles of pure qubit states, so that the qubits in each ensemble are prepared in identical (but unknown for us) states lying on the equator of the Bloch sphere. What is the best strategy to estimate fidelity between these two finite ensembles of qubit states? We discuss three possible strategies for the fidelity estimation. We show that the best strategy includes two stages: a specific unitary transformation on two ensembles and state estimation of the output states of this transformation.
description: 9 pages, 2 figures, 17 references
Enhanced Antenna Position Implementation Over Vehicular Ad Hoc Network (VNET) In 3D Space
Creators: name: Kanrar, Soumen
name: Siraj, Mohammad
Publisher: name: arXiv
Year: 2011
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: The technology related to networking moves wired connection to wireless connection.The basic problem concern in the wireless domain, random packet loss for the end to end connection. In this paper we show the performance and the impact of the packet loss and delay, by the bit error rate throughput etc with respect to the real world scenario vehicular ad hoc network in 3-dimension space (VANET in 3D). Over the years software development has responded to the increasing growth of wireless connectivity in developing network enabled software. In this paper we consider the real world physical problem in three dimensional wireless domain and map the problem to analytical problem . In this paper we simulate that analytic problem with respect to real world scenario by using enhanced antenna position system (EAPS) mounted over the mobile node in 3D space. In this paper we convert the real world problem into lab oriented problem by using the EAPS -system and shown the performance in wireless domain in 3 dimensional space.
description: 12 pages, 8 figures; ISSN: 0975-3834 [Online]; 0975-4679 [Print]
Γονεϊκή χρήση ουσιών και ενδοοικογενειακή βία ως παράγοντας επίδρασης στον ψυχισμό του εφήβου
Creators: name: Λαμπρινάκου, Μαρία Κυριάκου
Publisher: name: Aristotle University of Thessaloniki
Year: 2023
Subjects: Χρήση ουσιών
Βία
Ψυχισμός
Substance use
Violence
Psyche

description: Η παρούσα διπλωματική εργασία διερευνά την ποιοτική συσχέτιση της σχέσης της εξάρτησης και της κακοποίησης ως μοντέλα συμπεριφοράς του εξαρτημένου από τις ψυχότροπες ουσίες, ατόμου. Ειδικότερα, ασχοληθηκαμε με το αντίκτυπο τέτοιων συμπεριφορώνν στον ψυχισμό του ατόμου ως γονεϊκό πρότυπο μίμησης καθώς και τον τρόπο που μπορούν να συμβάλουν στην ανάπτυξης μίας δυσλειτουργικής συμπεριφοράς, η χρήση ψυχοδραστικών ουσιών.Προεκυψε μία αμφίδρομη σχέση μεταξύ κακοποίησης και εξάρτησης αναδεικνύοντας την γονεϊκή μέριμνα σημαντική στην αναπτυξιακή λειτουργία των παιδιών και η αναγκαιότητα αρτιότερης θεραπευτικής διαχείρισης.
description: This dissertation analyzes the qualitative relationship between the variables of addiction and abuse as models of behavior in the addicted person's familial environment to psychotropic substances. In particular, we presented the effect that such actions may have on an individual's psyche as a parental role model in the family environment, as well as the way may raise the chance of developing a dysfunctional behavior.The study's findings indicated a bidirectional association between abuse and reliance give prominence to the role of parental care in children's development and the need for more comprehensive therapeutic management.
description: Σε συνεργασία με: Πανεπιστήμιο Λευκωσίας (Κύπρος)
Integrity and Junkiness Failure Handling for Embedding-based Retrieval: A Case Study in Social Network Search
Creators: name: Wang, Wenping
name: Guo, Yunxi
name: Shen, Chiyao
name: Ding, Shuai
name: Liao, Guangdeng
name: Fu, Hao
name: Prabhakar, Pramodh Karanth
Publisher: name: arXiv
Year: 2023
Subjects: subject: Information Retrieval (cs.IR)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Embedding based retrieval has seen its usage in a variety of search applications like e-commerce, social networking search etc. While the approach has demonstrated its efficacy in tasks like semantic matching and contextual search, it is plagued by the problem of uncontrollable relevance. In this paper, we conduct an analysis of embedding-based retrieval launched in early 2021 on our social network search engine, and define two main categories of failures introduced by it, integrity and junkiness. The former refers to issues such as hate speech and offensive content that can severely harm user experience, while the latter includes irrelevant results like fuzzy text matching or language mismatches. Efficient methods during model inference are further proposed to resolve the issue, including indexing treatments and targeted user cohort treatments, etc. Though being simple, we show the methods have good offline NDCG and online A/B tests metrics gain in practice. We analyze the reasons for the improvements, pointing out that our methods are only preliminary attempts to this important but challenging problem. We put forward potential future directions to explore.
Enrique Granados' piano suite Goyescas: Los Majos Enamorados - a narrative interpretation in light of his Tonadillas for voice and piano
Creators: name: Schmidt, Kathryn
Publisher: name: University of British Columbia
Year: 2011

description: Granados’ Goyescas is a substantial six movement work for piano that was written between the years 1900 and 1914. Part I was published in Barcelona by Casa Dotesio in 1912, and Part II in 1914 by Unión Musical Espanola. What is not widely known is that around the same time, Granados composed twelve Tonadillas. These songs for voice and piano are closely related to the piano pieces, and were published by Casa Dotesio in 1913. The composer himself acknowledges the important relationship between the Tonadillas and Goyescas in the statement “. . . I wanted to create a collection that would serve me as a document for the Goyescas.” An analysis of similarities between the two works provides evidence for the fact that at least certain Tonadillas may have been composed before, or concurrently with the piano suite Goyescas, between the years 1900 and 1913. The current literature neglects the important connection between these works (Chapter 2); however, this study maintains that the Tonadillas are highly illuminating for performers, analysts and listeners of Goyescas, and are an important interpretive tool. Furthermore, Goyescas’ programmatic titles, use of folk tunes and other indications demand a narrative interpretation; this is only enlivened by study of the Tonadillas with their descriptive texts. Chapter 3 of this study will address the socio-political context that influenced Granados in his composition of Goyescas and the Tonadillas, with particular reference to Goya’s role and his Caprichos Nos. 5 and 10. A comparative study of the Tonadillas and Goyescas in Chapter 4 reveals important similarities which contribute to the narrative interpretation of Goyescas. A more rigorous analysis of Goyescas demonstrates formal variety and melodic coherence amongst the movements of the suite, further contributing to the narrative component (Chapter 5). Finally, in Chapter 6, a demonstration of the validity of the narrative interpretation in light of performance practice considerations will conclude this project. Goyescas is an invaluable work with an exciting narrative that becomes even more compelling when addressed in light of the Tonadillas for voice and piano.
Effect of extinction on quasar luminosity distances determined from UV and X-ray flux measurements
Creators: name: Zajaček, Michal
name: Czerny, Bożena
name: Khadka, Narayan
name: Martínez-Aldama, Mary Loli
name: Prince, Raj
name: Panda, Swayamtrupta
name: Ratra, Bharat
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
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: In Khadka et al. (2023), a sample of X-ray-detected reverberation-mapped quasars was presented and applied for the comparison of cosmological constraints inferred using two well-established relations in AGN -- the X-ray/UV luminosity ($L_{X}-L_{UV}$) relation and the broad-line region radius-luminosity ($R-L$) relation. $L_{X}-L_{UV}$ and $R-L$ luminosity distances to the same quasars exhibit a distribution of their differences that is generally asymmetric and positively shifted for the six cosmological models we consider. We demonstrate that this behaviour can be interpreted qualitatively to arise as a result of the dust extinction of UV/X-ray quasar emission. We show that the extinction always contributes to the non-zero difference between $L_{X}-L_{UV}$-based and $R-L$-based luminosity distances and we derive a linear relationship between the X-ray/UV colour index $E_{X-UV}$ and the luminosity-distance difference, which also depends on the value of the $L_{X}-L_{UV}$ relation slope. Taking into account the median and the peak values of the luminosity-distance difference distributions, the average X-ray/UV colour index falls in the range of $\overline{E}_{X-UV}=0.03-0.28$ mag for the current sample of 58 sources. This amount of extinction is typical for the majority of quasars and it can be attributed to the circumnuclear and interstellar media of host galaxies. After applying the standard hard X-ray and far-UV extinction cuts, heavily extincted sources are removed but overall the shift towards positive values persists. The effect of extinction on luminosity distances is more pronounced for the $L_{X}-L_{UV}$ relation since the extinction of UV and X-ray emissions both contribute.
description: 22 pages, 11 figures, 4 tables; accepted by AAS journals
Effective Models for Statistical Studies of Galaxy-Scale Gravitational Lensing
Creators: name: Lapi, A.
name: Negrello, M.
name: Gonzalez-Nuevo, J.
name: Cai, Z. -Y.
name: De Zotti, G.
name: Danese, L.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We have worked out simple analytical formulae that accurately approximate the relationship between the position of the source with respect to the lens center and the amplification of the images, hence the lens cross section, for realistic lens profiles. We find that, for essentially the full range of parameters either observationally determined or yielded by numerical simulations, the combination of dark matter and star distribution can be very well described, for lens radii relevant to strong lensing, by a simple power-law whose slope is very weakly dependent on the parameters characterizing the global matter surface density profile and close to isothermal in agreement with direct estimates for individual lens galaxies. Our simple treatment allows an easy insight into the role of the different ingredients that determine the lens cross section and the distribution of gravitational amplifications. They also ease the reconstruction of the lens mass distribution from the observed images and, vice-versa, allow a fast application of ray-tracing techniques to model the effect of lensing on a variety of source structures. The maximum amplification depends primarily on the source size. Amplifications larger than ~20 are indicative of compact source sizes at high-z, in agreement with expectations if galaxies formed most of their stars during the dissipative collapse of cold gas. Our formalism has allowed us to reproduce the counts of strongly lensed galaxies found in the H-ATLAS SDP field. While our analysis is focussed on spherical lenses, we also discuss the effect of ellipticity and the case of late-type lenses (showing why they are much less common, even though late-type galaxies are more numerous). Furthermore we discuss the effect of a cluster halo surrounding the early-type lens and of a supermassive black hole at its center.
description: 34 pages, 20 figures, 1 table. Typos corrected. Accepted by ApJ
Προσδιορισμός φαινολών σε βιοέλαια καταλυτικής πυρόλυσης βιομάζας
Creators: name: Λάππα, Ζωή Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2023
Subjects: Φαινολικές ενώσεις
Βιοέλαιο
Πυρόλυση
Phenolic compounds
Bio oil
Pyrolysis

description: Σκοπός της διπλωματικής εργασίας ήταν ο προσδιορισμός φαινολικών ενώσεων σε βιοέλαια που προέκυψαν από την καταλυτική πυρόλυση βιομάζας. Αρχικά, με δύο διαφορετικές διαδικασίες εκχυλίστηκαν τα διαθέσιμα βιοέλαια και στη συνέχεια, κάθε εκχύλισμα αναλύθηκε με DPPH και Folin Ciocalteu, για τον προσδιορισμό της αντιοξειδωτικής δράσης των βιοελαίων, καθώς πραγματοποιήθηκε και η αναλυτική τεχνική GC – MS, για την ταυτοποίηση των φαινολικών ενώσεων που περιέχονται σε κάθε βιοέλαιο. Ακόμη, με βάση τα αποτελέσματα των αναλυτικών τεχνικών, συγκρίθηκαν τα βιοέλαια ως προς την πρώτη τους ύλη, ως προς τον καταλύτη που χρησιμοποιήθηκε για την παραγωγή τους, αλλά και ως προς την καταλληλότητα της κάθε πειραματικής μεθόδου.
description: The aim of the present thesis was the determination of phenolic compounds in bio – oils from catalytic pyrolysis of biomass. First of all, the available bio oils were extracted with two different experimental methods. Then, each extract was analyzed with DPPH and Folin Ciocalteu, aiming the determination of the antioxidant activity in bio oils. Moreover, the analytical technique GC – MS was also used, to identify the phenolic compounds that each bio oil contains. Also, based on the results of those analytical techniques, the bio oils were compared in terms of their raw material, in terms of the catalyst used in the pyrolysis of biomass, and also in terms of the suitability of each experimental method.
The nature of the Na I D-lines in the Red Rectangle
Creators: name: Thomas, Joshua D.
name: Witt, Adolf N.
name: Aufdenberg, Jason P.
name: Bjorkman, Jon E.
name: Dahlstrom, Julie A.
name: Federman, Steven R.
name: Hobbs, Lew M.
name: Vijh, Uma P.
name: York, Donald G.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: In this paper we examine the profiles of the complex Na I D-lines in the Red Rectangle. The spectra were acquired with the ARCES échelle spectrograph R = 38,000 on the 3.5-m telescope at the Apache Point Observatory. Additional spectra taken with STIS were acquired from the Hubble Legacy Archive (HLA) and were used to independently confirm the spatial origin of the spectral features. The profile of a single D-line consists of double-peaked emission, red-shifted absorption and blue-shifted absorption. We find that the double-peaked emission originates from the bipolar outflow, the red-shifted absorption feature is due to the photospheric line, and the blue-shifted absorption arises from the bipolar outflow as seen against the photosphere of the luminous post-AGB component in HD 44179. In order to better understand the Na I D-line profile, we examined the periodically variable asymmetric photospheric absorption lines. The asymmetric lines are interpreted as a signature of slow self-accretion following enhanced mass-loss around periastron. An empirical model was constructed to remove the photospheric component from the Na I D-line profile in order to study the nebular emission and absorption of sodium along the line-of-sight to the primary. This paper also discusses the different origins of the single-peaked emission, the double-peaked emission and the blue-shifted and red-shifted absorption components.
description: 16 pages, 14 figures, 2 tables, Accepted for publication in the MNRAS 2011 July 13. Received 2011 July 12; in original form 2010 December 1. The definitive version is available at www.blackwell-synergy.com
Χρήση στατινών και κίνδυνος ανάπτυξης νευροπάθειας και σακχαρώδη διαβήτη τύπου 2
Creators: name: Λιθαρή, Χριστίνα Σάββα
Publisher: name: Aristotle University of Thessaloniki
Year: 2023
Subjects: Στατίνες
HMG-CoA
Αναστολείς
Κίνδυνος
Σακχαρώδης διαβήτης τύπου 2
Περιφερική νευροπάθεια
Καρδιαγγειακός κίνδυνος
Statins
HMG-CoA inhibitors
Risk
Diabetes mellitus type 2
Peripheral neuropathy
Cardiovascular risk

description: Η δυσλιπιδαιμία αποτελεί έναν από τους κύριους παράγοντες καρδιαγγειακού κινδύνου. Φάρμακο πρώτης γραμμής για τη μείωση των λιπιδίων και άρα και του καρδιαγγειακού κινδύνου αποτελούν οι στατίνες (αναστολείς του HMG-CoA). Δύο από τις ανεπιθύμητες ενέργειες των στατινών είναι η ανάπτυξη περιφερικής νευροπάθειας και σακχαρώδη διαβήτη τύπου 2. Η σχέση της λήψης στατίνης με την ανάπτυξη περιφερικής νευροπάθειας δεν έχει ακόμη διευκρινιστεί πλήρως. Άλλες μελέτες υποστηρίζουν την προστατευτική δράση των στατινών, ενώ άλλες θεωρούν πως αυτές αυξάνουν τον κίνδυνο νευροπάθειας μέσω μείωσης του συνενζύμου Q10 και της βιταμίνης Ε και υπερβολικής μείωσης της CHOL. Ο κίνδυνος ανάπτυξης σακχαρώδη διαβήτη τύπου 2 είναι χρόνο- και δόσο-εξαρτώμενος από τη χρήση στατινών και θεωρείται μεγαλύτερος με τη χρήση ισχυρών στατινών. Ως πιθανοί μηχανισμοί της διαβητογόνου δράσης των στατινών αναφέρονται η μείωση της δραστικότητας των L-διαύλων Ca2+, η μείωση της έκφρασης των υποδοχέων GLUT4, η συσσώρευση ελεύθερων λιπαρών οξέων, η μείωση των επιπέδων αδιπονεκτίνης και λεπτίνης, βλάβες στα β-κύτταρα και επιδράσεις σε microRNAs. Παρ’όλα αυτά οι μελέτες καταλήγουν στο ότι η μείωση του καρδιαγγειακού κινδύνου υπερτερεί των κινδύνων από τη λήψη στατίνης κι έτσι παρόλο που υπάρχουν εναλλακτικές θεραπείες μείωσης των λιπιδίων (αγωνιστές PPARγ υποδοχέων, PCSK9 αναστολείς, εζετιμίμπη), οι στατίνες αποτελούν στις κατευθυντήριες οδηγίες πρώτο φάρμακο εκλογής για την αντιμετώπιση της δυσλιπιδαιμίας.
description: Dyslipidemia is a major cardiovascular risk factor. First line medication for the reduction of lipid levels and therefore reduction of the cardiovascular risk, are statins (HMG-CoA inhibitors). Peripheral neuropathy and new-onset diabetes mellitus type 2, are two of the side effects of statin therapy. The connection between statin therapy and peripheral neuropathy is not yet clear. Some studies claim that statins protect from neuropathy, while others regard them as neuropathy cause by reduction of Q10 and vitamin E levels and excess reduction of cholesterol. The risk of new-onset diabetes mellitus type 2 is dose- and time-dependent and it is considered to be greater with potent statin use. Reduction of L-type Ca2+ channels’ activity, GLUT4 receptors’ potency, accumulation of free fatty acids, reduction in adiponectin and leptin levels and effects on microRNAs are potential mechanisms of diabetogenic statin action. Despite those side effects, studies conclude that the decrease of cardiovascular risk is greater than the risks regarding statin use and despite alternative therapies for the reduction of lipid levels (PPARγ activators, PCSK9 inhibitors, ezetimibe) statins remain the first choice medication for dyslipidemia therapy in guidelines.
Disjoint Empty Convex Pentagons in Planar Point Sets
Creators: name: Bhattacharya, Bhaswar B.
name: Das, Sandip
Publisher: name: arXiv
Year: 2011
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 52C10, 52A10

description: Harborth [{\it Elemente der Mathematik}, Vol. 33 (5), 116--118, 1978] proved that every set of 10 points in the plane, no three on a line, contains an empty convex pentagon. From this it follows that the number of disjoint empty convex pentagons in any set of $n$ points in the plane is least $\lfloor\frac{n}{10}\rfloor$. In this paper we prove that every set of 19 points in the plane, no three on a line, contains two disjoint empty convex pentagons. We also show that any set of $2m+9$ points in the plane, where $m$ is a positive integer, can be subdivided into three disjoint convex regions, two of which contains $m$ points each, and another contains a set of 9 points containing an empty convex pentagon. Combining these two results, we obtain non-trivial lower bounds on the number of disjoint empty convex pentagons in planar points sets. We show that the number of disjoint empty convex pentagons in any set of $n$ points in the plane, no three on a line, is at least $\lfloor\frac{5n}{47}\rfloor$. This bound has been further improved to $\frac{3n-1}{28}$ for infinitely many $n$.
description: 23 pages, 28 figures
Two-step Shape Invariance in the Framework of N-fold Supersymmetry
Creators: name: Roy, Barnana
name: Tanaka, Toshiaki
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: We extensively investigate two-step shape invariance in the framework of N-fold supersymmetry. We first show that any two-step shape-invariant system possesses type A 2-fold supersymmetry with an intermediate Hamiltonian and thus has second-order parasupersymmetry as well. Employing the general form of type A 2-fold supersymmetry, we systematically construct two-step shape-invariant potentials. In addition to the well-known ordinary shape-invariant potentials, we obtain several new and novel two-step shape-invariant ones which are not ordinary shape invariant. Furthermore, some of the latter potentials are conditionally two-step shape invariant and thus are conditionally solvable.
description: 31 pages, no figures
Data and Knowledge Co-driving for Cancer Subtype Classification on Multi-Scale Histopathological Slides
Creators: name: Yu, Bo
name: Chen, Hechang
name: Zhang, Yunke
name: Cong, Lele
name: Pang, Shuchao
name: Zhou, Hongren
name: Wang, Ziye
name: Cong, Xianling
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Artificial intelligence-enabled histopathological data analysis has become a valuable assistant to the pathologist. However, existing models lack representation and inference abilities compared with those of pathologists, especially in cancer subtype diagnosis, which is unconvincing in clinical practice. For instance, pathologists typically observe the lesions of a slide from global to local, and then can give a diagnosis based on their knowledge and experience. In this paper, we propose a Data and Knowledge Co-driving (D&K) model to replicate the process of cancer subtype classification on a histopathological slide like a pathologist. Specifically, in the data-driven module, the bagging mechanism in ensemble learning is leveraged to integrate the histological features from various bags extracted by the embedding representation unit. Furthermore, a knowledge-driven module is established based on the Gestalt principle in psychology to build the three-dimensional (3D) expert knowledge space and map histological features into this space for metric. Then, the diagnosis can be made according to the Euclidean distance between them. Extensive experimental results on both public and in-house datasets demonstrate that the D&K model has a high performance and credible results compared with the state-of-the-art methods for diagnosing histopathological subtypes. Code: https://github.com/Dennis-YB/Data-and-Knowledge-Co-driving-for-Cancer-Subtypes-Classification
Multi-Modality Multi-Scale Cardiovascular Disease Subtypes Classification Using Raman Image and Medical History
Creators: name: Yu, Bo
name: Chen, Hechang
name: Jia, Chengyou
name: Zhou, Hongren
name: Cong, Lele
name: Li, Xiankai
name: Zhuang, Jianhui
name: Cong, Xianling
Publisher: name: arXiv
Year: 2023
Subjects: subject: Image and Video Processing (eess.IV)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Raman spectroscopy (RS) has been widely used for disease diagnosis, e.g., cardiovascular disease (CVD), owing to its efficiency and component-specific testing capabilities. A series of popular deep learning methods have recently been introduced to learn nuance features from RS for binary classifications and achieved outstanding performance than conventional machine learning methods. However, these existing deep learning methods still confront some challenges in classifying subtypes of CVD. For example, the nuance between subtypes is quite hard to capture and represent by intelligent models due to the chillingly similar shape of RS sequences. Moreover, medical history information is an essential resource for distinguishing subtypes, but they are underutilized. In light of this, we propose a multi-modality multi-scale model called M3S, which is a novel deep learning method with two core modules to address these issues. First, we convert RS data to various resolution images by the Gramian angular field (GAF) to enlarge nuance, and a two-branch structure is leveraged to get embeddings for distinction in the multi-scale feature extraction module. Second, a probability matrix and a weight matrix are used to enhance the classification capacity by combining the RS and medical history data in the multi-modality data fusion module. We perform extensive evaluations of M3S and found its outstanding performance on our in-house dataset, with accuracy, precision, recall, specificity, and F1 score of 0.9330, 0.9379, 0.9291, 0.9752, and 0.9334, respectively. These results demonstrate that the M3S has high performance and robustness compared with popular methods in diagnosing CVD subtypes.
Singularities of Feynman Integrals
Creators: name: Pathak, Tanay
name: Sreekantan, Ramesh
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: In this paper, we study the singularities of Feynman integrals using homological techniques. We analyse the Feynman integrals by compactifying the integration domain as well as the ambient space by embedding them in higher-dimensional space. In this compactified space the singularities occur due to the meeting of compactified propagators at non-general position. The present analysis, which had been previously used only for the singularities of second-type, is used to study other kinds of singularities viz threshold, pseudo-threshold and anomalous threshold singularities. We study various one-loop and two-loop examples and obtain their singularities. We also present observations based on results obtained, that allow us to determine whether the singularities lie on the physical sheet or not for some simple cases. Thus this work at the frontier of our knowledge of Feynman integral calculus sheds insight into the analytic structure.
description: Journal Version
Vortex families near a spectral edge in the Gross-Pitaevskii equation with a two-dimensional periodic potential
Creators: name: Dohnal, Tomas
name: Pelinovsky, Dmitry
Publisher: name: arXiv
Year: 2011
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: We examine numerically vortex families near band edges of the Bloch wave spectrum in the Gross--Pitaevskii equation with a two-dimensional periodic potential and in the discrete nonlinear Schroedinger equation. We show that besides vortex families that terminate at a small distance from the band edges via fold bifurcations there exist vortex families that are continued all way to the band edges.
description: 12 pages, 8 figures
Next-to-leading-logarithmic PanScales showers for Deep Inelastic Scattering and Vector Boson Fusion
Creators: name: van Beekveld, Melissa
name: Ravasio, Silvia Ferrario
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We introduce the first family of parton showers that achieve next-to-leading logarithmic (NLL) accuracy for processes involving a $t$-channel exchange of a colour-singlet, and embed them in the PanScales framework. These showers are applicable to processes such as deep inelastic scattering (DIS), vector boson fusion (VBF), and vector boson scattering (VBS). We extensively test and verify the NLL accuracy of the new showers at both fixed order and all orders across a wide range of observables. We also introduce a generalisation of the Cambridge-Aachen jet algorithm and formulate new DIS observables that exhibit a simple resummation structure. The NLL showers are compared to a standard transverse-momentum ordered dipole shower, serving as a proxy for the current state-of-the-art leading-logarithmic showers available in public codes. Depending on the observable, we find discrepancies at NLL of the order of $15\%$. We also present some exploratory phenomenological results for Higgs production in VBF. This work enables, for the first time, to resum simultaneously global and non-global observables for the VBF process at NLL accuracy.
description: 34 pages + 10 pages of Appendices, 13 figures
Phosphorus recovery from wastewater through struvite crystallization in a fluidized bed reactor : kinetics, hydrodynamics and performance
Creators: name: Rahaman, Md. Saifur
Publisher: name: University of British Columbia
Year: 2011

description: Struvite crystallization from wastewater, using a novel fluidized bed reactor developed at UBC, offers a significant reduction (80—90%) of soluble phosphate from waste streams and generates a product that can be reused as a slow release fertilizer. To implement this green technology at a plant scale, a reactor model that incorporates process kinetics, thermodynamics and the system hydrodynamics, is required. Therefore, the main objectives of this dissertation were to study the struvite precipitation kinetics, thermodynamics, and fluidization characteristics of the struvite crystals bed, and finally, develop a model based on this information. Both dissolution and precipitation experiments were carried out in a jar test apparatus to study the solubility and precipitation kinetics of struvite. The struvite solubility product, pKsp values were found to vary from 13.43—14.10, for different water and wastewater samples tested at 20°C. Also, a correlation was developed to estimate struvite solubility at different temperatures. In struvite precipitation experiments, the operating conditions of supersaturation, pH, Mg:P ratio, mixing and seeding conditions were varied to identify the effect of those process parameters on the precipitation kinetics. The kinetic rate constant increases with increasing both the supersaturation and Mg:P ratios. Both the mixing energy and seeding rate were found to have minimal effect on ortho-P removal. Detailed experimental and numerical investigations of the fluidization characteristics of struvite crystals were performed. The bed expansion behaviour of mono-sized struvite crystals can be represented reasonably well by the Richardson-Zaki relation and the expansion characteristics of poly-dispersed struvite crystals bed can be predicted by the ‘serial model’. The CFD simulated bed expansion behaviour of the crystals bed was found to be consistent with the experimental results. Also, CFD simulations were capable of capturing the mixing/segregation behavior of a fluidized-bed of multi-particle stnivite crystals. Finally, a mathematical model was developed by assuming a complete segregation of the bed crystals and liquid movement as plug flow in the reactor. The model predictions provided a reasonably good fit with the experimental results for both P0₄-P and NH₄-N removal. The model predicted mean size of product crystals matched reasonably well with pilot scale experimental results.
Asymptotic behavior of quantum walks with spatio-temporal coin fluctuations
Creators: name: Ahlbrecht, Andre
name: Cedzich, Christopher
name: Matjeschk, Robert
name: Scholz, Volkher B.
name: Werner, Albert H.
name: Werner, Reinhard F.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Quantum walks subject to decoherence generically suffer the loss of their genuine quantum feature, a quadratically faster spreading compared to classical random walks. This intuitive statement has been verified analytically for certain models and is also supported by numerical studies of a variety of examples. In this paper we analyze the long-time behavior of a particular class of decoherent quantum walks, which, to the best of our knowledge, was only studied at the level of numerical simulations before. We consider a local coin operation which is randomly and independently chosen for each time step and each lattice site and prove that, under rather mild conditions, this leads to classical behavior: With the same scaling as needed for a classical diffusion the position distribution converges to a Gaussian, which is independent of the initial state. Our method is based on non-degenerate perturbation theory and yields an explicit expression for the covariance matrix of the asymptotic Gaussian in terms of the randomness parameters.
Ion association in low-polarity solvents: comparisons between theory, simulation, and experiment
Creators: name: Valeriani, Chantal
name: Camp, Philip J.
name: Zwanikken, Jos W.
name: van Roij, René
name: Dijkstra, Marjolein
Publisher: name: arXiv
Year: 2011
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: The association of ions in electrolyte solutions at very low concentration and low temperature is studied using computer simulations and quasi-chemical ion-pairing theory. The specific case of the restricted primitive model (charged hard spheres) is considered. Specialised simulation techniques are employed that lead to efficient sampling of the arrangements and distributions of clusters and free ions, even at conditions corresponding to nanomolar solutions of simple salts in solvents with dielectric constants in the range 5-10, as used in recent experimental work on charged-colloid sus- pensions. A direct comparison is effected between theory and simulation using a variety of clustering criteria and theoretical approximations. It is shown that conventional distance-based cluster criteria can give erroneous results. A reliable set of theoretical and simulation estimators for the degree of association is proposed. The ion-pairing theory is then compared to experimental results for salt solutions in low-polarity solvents. The agreement is excellent, and on this basis some calculations are made for the screening lengths which will figure in the treatment of colloid-colloid interactions in such solutions. The accord with available experimental results is complete.
General Continuity Bounds for Quantum Relative Entropies
Creators: name: Bluhm, Andreas
name: Capel, Ángela
name: Gondolf, Paul
name: Pérez-Hernández, Antonio
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In this article, we generalize a proof technique by Alicki, Fannes and Winter and introduce a method to prove continuity bounds for entropic quantities derived from different quantum relative entropies. For the Umegaki relative entropy, we mostly recover known almost optimal bounds, whereas, for the Belavkin-Staszewski relative entropy, our bounds are new. Finally, we use these continuity bounds to derive a new entropic uncertainty relation.
description: 9 pages, 1 figure. This is a short version of the paper arXiv:2208.00922 with an additional new entropic uncertainty relation. v2,v3: We corrected a flaw in v1 of the paper
Data Snack - Machine Learning And Artificial Intelligence Documentation
Creators: name: Thöricht, Heike
Publisher: name: Zenodo
Year: 2023
Subjects: Machine Learning
Artificial Intelligence
AI
Model cards
Data Nutrition Label
Datasheets for datasets
Documentation
Best practices

description: Machine learning and artificial intelligence have revolutionized the way we solve complex problems and make data-driven decisions. The effectiveness of any project relies heavily on well-documented processes, models, and code. This Data Snack/ Coffee Lecture on Machine Learning and Artificial Intelligence Documentation provides best practices on how to document your machine learning and artificial intelligence models and datasets.
Boletina lundstroemi Landrock 1912
Creators: name: El Mouden, Mohamed Amin
name: Chandler, Peter J.
name: Saidoun, Imane
name: Driauach, Ouafaa
name: Belqat, Boutaïna
Publisher: name: Zenodo
Year: 2025
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Mycetophilidae
Boletina
Boletina lundstroemi

description: Boletina lundstroemi Landrock, 1912
Material examined.
Morocco – Middle Atlas Region • 1 ♂; Oued Aïn Chabab; 20/V/2022; K. Aattouch, M. El Ouahabi and M. A. El Mouden leg; UAE-FST MA 22/2409.
North African distribution.
New to Morocco and North Africa.
description: Published as part of El Mouden, Mohamed Amin, Chandler, Peter J., Saidoun, Imane, Driauach, Ouafaa & Belqat, Boutaïna, 2025, A new species of Docosia Winnertz, 1864 and new records of fungus gnats (Diptera, Bolitophilidae, Keroplatidae and Mycetophilidae) from North Africa, pp. 349-379 in ZooKeys 1233 on pages 349-379, DOI: 10.3897/zookeys.1233.130502
On the HU Aquarii planetary system hypothesis
Creators: name: Gozdziewski, Krzysztof
name: Nasiroglu, Ilham
name: Slowikowska, Aga
name: Beuermann, Klaus
name: Kanbach, Gottfried
name: Gauza, Bartosz
name: Maciejewski, Andrzej J.
name: Schwarz, Robert
name: Schwope, Axel D.
name: Hinse, Tobias C.
name: Haghighipour, Nader
name: Burwitz, Vadim
name: Slonina, Mariusz
name: Rau, Arne
Publisher: name: arXiv
Year: 2012
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: In this work, we investigate the eclipse timing of the polar binary HU Aquarii that has been observed for almost two decades. Recently, Qian et al. attributed large (O-C) deviations between the eclipse ephemeris and observations to a compact system of two massive jovian companions. We improve the Keplerian, kinematic model of the Light Travel Time (LTT) effect and re-analyse the whole currently available data set. We add almost 60 new, yet unpublished, mostly precision light curves obtained using the time high-resolution photo-polarimeter OPTIMA, as well as photometric observations performed at the MONET/N, PIRATE and TCS telescopes. We determine new mid--egress times with a mean uncertainty at the level of 1 second or better. We claim that because the observations that currently exist in the literature are non-homogeneous with respect to spectral windows (ultraviolet, X-ray, visual, polarimetric mode) and the reported mid--egress measurements errors, they may introduce systematics that affect orbital fits. Indeed, we find that the published data, when taken literally, cannot be explained by any unique solution. Many qualitatively different and best-fit 2-planet configurations, including self-consistent, Newtonian N-body solutions may be able to explain the data. However, using high resolution, precision OPTIMA light curves, we find that the (O-C) deviations are best explained by the presence of a single circumbinary companion orbiting at a distance of ~4.5 AU with a small eccentricity and having ~7 Jupiter-masses. This object could be the next circumbinary planet detected from the ground, similar to the announced companions around close binaries HW Vir, NN Ser, UZ For, DP Leo or SZ Her, and planets of this type around Kepler-16, Kepler-34 and Kepler-35.
description: 20 pages, 18 figures, accepted to Monthly Notices of the Royal Astronomical Society (MNRAS)
title: Satzung zur Änderung der Promotionsordnung der Fakultät für Naturwissenschaften an der Universität Paderborn : vom 30. Juni 2016
Creators: name: Universität Paderborn
Publisher: name: UB-PAD - Paderborn University Library
Year: 2016
Subjects: subject: Sozialwissenschaften
subject: Bildung und Erziehung
subject: Hochschulbildung

description: Amtliche Mitteilungen / Universität Paderborn