cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Mesoporous graphitic carbon nitride decorated with Cu nanoparticles for enhanced photo-degradation for tartrazine yellow
Creators: name: Xu, Jiahe
Publisher: name: No Publisher Supplied
Year: 2018

description: Two strategies were combined to modify the carbon nitride, which are creating  a mesoporous structure, and deposition of Cu nanoparticles, to creat high sepcific surfaces area within a carbon nitride framework and inhibit the recombination of electron and hole pairs, thereby increase the efficiency of photocatalytic activity. To make the material, melamine powder, which is inexpensive, easy to get and non-poisonous, was used as precursor and, SiO2 was used as a hard template to create a different size mesoporous structure through a simple thermal condensation method. Two different disired amount of copper nanoparticles were deposited on the surface of mesoporous carbon nitride (MCN) which are 5% and 10% wt.% through a simple precipitation-reduction method. To futher investigate the photocatalytic activity, the Cu-MCN materials were used as photocatalysts for degradation for tartrazine yellow which is a harmful dye in aqueous solution under UV-light irradiation. The result showed that Cu-MCN has good photocatalytic activity under light irradiation. Among six sample synthesized, Cu(10)-MCN showed the best photocatalytic activity due to its mesoporous structure and optimized amount and type of Cu in it. A mechanism was proposed to explain the effectiveness of material to photo-degrade tartrazine yellow. Finally, we make some suggestion which highlighted the future development of g-C3N4 based photocatalysts.
Generational comparison
Creators: name: Xiong, Ruiying
Publisher: name: No Publisher Supplied
Year: 2018

description: Obesity, as a chronic disease and a risk factor for many serious diseases, is a highly prevalent public health problem in the United States. Although there were no significant changes in childhood obesity prevalence, adults showed an increasing trend in the past decade. However, childhood obesity can be a risk factor for adult obesity as behavior patterns and eating preferences can track across childhood and become lifelong habits that are resistant to change. Thus, early interventions are necessary and potentially more effective to prevent excessive weight gain. HomeStyles, as a health promotion intervention program, targets parents of preschoolers to help shape their home environment and weight-related behaviors. To further investigate study outcome and discover potential new strategies for future health education programs, we evaluated whether generational differences exist in HomeStyles participants in terms of weight-related parenting. Study participants were categorized into Generation X (born in 1965-1981) and Millennials (born in 1982-1999) for comparison. Based on the analyses of 333 participants (164 as Generation X, and 169 as Millennials), we discovered a few differences in socio-demographic, behavioral and cognitive aspects of the two generations. Generation X participants had higher education levels, were more likely to have a paid employment, and more affluent as well as less food insecure than Millennial participants. Millennial participants reported higher outcome expectations from eating healthy and exercising than Generation X participants did, but the higher cognitive level is not reflected in better weight-related behaviors. Moreover, we evaluated participants remained versus dropped out to seek potential factors that affect their decision making. For Millennial participants, they tend to stay for follow-up studies if their spouse or partner shared more financial responsibilities of supporting the family, while this connection was not discovered for Generation X. For those who dropped out of the study, Generation X participants were more likely to report depressive symptoms than Millennials. Thus, we might take the effect of mood status on retention efforts into consideration for future health education programs. Although we discovered a few differences between Generation X and Millennials participating HomeStyles, we attribute the difference as the result of being in different life stages instead of generation specific culture. In our conclusion, Generation X and Millennial adults were more similar than different as parents of preschoolers in the scenario of weight-related parenting. Tailored health intervention programs targeting different generations might not be warranted.
Energy Transitions: A Dentist's-Eye View
Creators: name: Seidner, Josh
Publisher: name: Unknown
Year: 2023
Subjects: subject: inflation
subject: climate skepticism
subject: electric cars
subject: lithium
subject: infrastructure
subject: nuclear energy
subject: environmentalism
subject: oil transportation
subject: investment

description: Josh Seidner interviews retired dentist and family friend Alvin Berger about the energy transformations he has witnessed throughout his life, as well as his career in dentistry. Dr Berger discusses inflation since the 1960s, observing that he did not experience dramatic effects of energy price hikes himself or frequently hear patients discuss energy. He outlines his informed skepticism about the findings of climate scientists and the costs of environmental activism against large energy projects. He describes his experience with electric cars and his views on nuclear energy and oil pipelines. Josh and Dr Berger conclude by discussing investments.
First steps towards supercharging remote development
Creators: name: Córdoba, Carlos
name: Gerlach, C.A.M.
Publisher: name: Zenodo
Year: 2023
Subjects: Python
scientific Python
open source
remote development
scientific software

description: Spyder is a popular scientific environment and IDE among researchers, engineers and data analysts. Over the past few years, a common request from its users has been to support remote and cloud-based workflows, with data and code on high performance computing (HPC) clusters or cloud providers like AWS, GCP and DigitalOcean. Adding such a feature would open up many new research possibilities by enabling the scientific community to tackle data and compute-intensive programming tasks from the ease and efficiency of their local development environment. When users cannot connect to a server through a web browser or want to use an IDE for its reproducibility/reusuability features, they have two options to work remotely. They can either edit and execute their files in a terminal, which is not user-friendly; or start their IDE on the server and display it locally, which is resource-intensive on the remote machine and slow on the local one. Furthermore, scientists typically find it difficult to sync files to the local machine and/or version control their code on the remote one, so remote changes are often lost, out of sync or difficult to integrate with code developed locally. To address this situation, we are adding and enhancing support for local installations of Spyder to sync files and run code on remote compute servers. That will allow users to develop code from their local machine with a desktop IDE and the full computing power of a remote system at their fingertips, while efficiently using server resources. The first step in that direction is to enhance the existing remote code execution in Spyder. The current workflow for that is error-prone and quite cumbersome. It requires users to install the Spyder-Kernels package on the remote machine, manually start a kernel on it and provide the kernel connection file to the local machine. Since Spyder does not currently have a way to store or identify state changes, users will have to repeat this costly setup procedure if there are any configuration modifications on the remote machine.

 The poster details the plans to fully automate this process so that Spyder can start and connect to a remote kernel automatically, with the user only needing to provide the SSH credentials and some remote environment details. It presents our rationale to make Spyder an IDE with first-class support for remote development, then it will then showcase the new functionality described above, and finally outline our next steps to further improve this workflow for users.
description: Funded by a Chan Zuckerberg Initiative Essential Open Source Software for Science grant - Cycle 5
WFIRST Ultra-Precise Astrometry I: Kuiper Belt Objects
Creators: name: Gould, Andrew
Publisher: name: arXiv
Year: 2014
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: I show that the WFIRST microlensing survey will enable detection and precision orbit determination of Kuiper Belt Objects (KBOs) down to H_=28.2 over an effective area of about 17 sq.deg. Typical fractional period errors will be about 1.5% x 10^(0.4(H-28.2)) with similar errors in other parameters for roughly 5000 KBOs. Binary companions to detected KBOs can be detected to even fainter limits, H_vega=29, corresponding to $R\sim 30.5$ and effective diameters D~7 km. For KBOs H~23, binary companions can be found with separations down to 10 mas. This will provide an unprecedented probe of orbital resonance and KBO mass measurements. More than a thousand stellar occultations by KBOs can be combined to determine the mean size as a function of KBO magnitude down to H~25. Current ground-based microlensing surveys can make a significant start on finding and characterizing KBOs using existing and soon-to-be-acquired data.
description: 13 pages, 4 figures. Submitted to the Journal of the Korean Astronomical Society
On (spinor)-helicity and bosonization in $AdS_4/CFT_3$
Creators: name: Skvortsov, Evgeny
name: Yin, Yihao
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Helicity is a useful concept both for AdS${}_4$ and CFT${}_3$ studies. We work out the complete AdS${}_4$/CFT${}_3$ dictionary for spinning fields/operators in the spinor-helicity base that allows one to scalarize any $n$-point contact vertex. AdS${}_4$-vertices encode correlation functions of conserved currents, stress-tensor and, more generally, higher spin currents in a simple way. We work out the dictionary for Yang-Mills- and gravity-type theories with higher derivative corrections as well as some higher spin examples and exemplify the relation to the three-dimensional bosonization duality. The bosonization can be understood as a simple surgery: vertices/correlators are built via an EM-duality transformation by sewing together (anti)-Chiral higher spin gravities, to whose existence the three-dimensional bosonization duality can be attributed (up to the proof of uniqueness).
description: replaced with a published version, 55 pages
title: Ανάπτυξη android εφαρμογής Street Art οδηγός πόλης
title: Development of android application Street Art city guide
titleType: AlternativeTitle
Creators: name: Χαλαστάνης, Κωνσταντίνος
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2022
Subjects: subject: Android
subject: Street Art
subject: App
subject: Εφαρμογή

description: Έχει παρέλθει σχεδόν πάνω από μία δεκαετία που τα έξυπνα κινητά τηλέφωνα έχουν έρθει στη ζωή μας και η πραγματικότητα είναι ότι έχουν αλλάξει κατά πολύ την συμπεριφορά μας σε πολλούς τομείς θετικά αλλά και σε πολλούς αρνητικά. Είναι γεγονός δε πως ακούμε την φράση «η μετάβαση στη ψηφιακή εποχή» όλο και πιο συχνά, συνεχώς από περισσότερα μέσα και η πραγματικότητα είναι πως την τελευταία δεκαετία οι συνήθειές μας σταδιακά έχουν περάσει στον ψηφιακό κόσμο όπως το e-banking, ο τρόπος που κάνουμε τη φορολογική μας δήλωση, η επικοινωνία μας, το άλμπουμ των φωτογραφιών μας και πολλά άλλα. Η εργασία που αναπτύσσεται στη συνέχεια ανήκει και αυτή σε αυτό το κόσμο της μετάβασης. Αφορά μια εφαρμογή που σκοπός της είναι να αναδείξει την τέχνη του δρόμου. Η δυνατότητα που θέλει να δώσει στο χρήστη είναι να μπορέσει να βρει σε μια λίστα συγκεντρωμένα τα «Street Art» έργα που είναι τοποθετημένα σε διάφορα σημεία της πόλης, να τον ειδοποιήσει για τυχόν κοντινά σε αυτόν με βάση τις ρυθμίσεις του αλλά και να τον βάλει στο παιχνίδι της αναζήτησης καθώς θα μπορέσει και ο ίδιος να προσθέσει ένα “Street Art» έργο εάν το βρει η αν φυσικά είναι ο δημιουργός του. Το προγραμματιστικό περιβάλλον που χρησιμοποιήθηκε για την υλοποίηση της εφαρμογής είναι το Android Studio και γράφτηκε σε γλώσσα προγραμματισμού Java με xml για την εμφάνιση. Για την υλοποίηση διάφορων λειτουργιών εκτός από τις πολλές δυνατότητες που προσφέρει το Android Studio, χρησιμοποιήθηκε η Firebase πλατφόρμα της Google για να καλύψει την ανάγκη χρήσης βάσης δεδομένων, χώρου αποθήκευσης και αυθεντικοποίησης χρήστη καθώς και άλλες βιβλιοθήκες που θα αναπτυχθούν στη συνέχεια του εγγράφου. Εν τέλει η android εφαρμογή που θα αναπτυχθεί στη συνέχεια αυτής της εργασίας, θέλει να πετύχει αυτή την «μετάβαση» της εμπειρίας ενός ανθρώπου που θα αναζητούσε τα «έργα του δρόμου» γνωρίζοντας την οδό, ρωτώντας και ψάχνοντας μέσα στην πόλη, σε μια εμπειρία ενός ανοιχτού μουσείου που μπορεί να βρει τα έργα στους “διαδρόμους” της πόλης συμβουλευόμενος το κινητό του τηλέφωνο.
Models Supporting Development of Complex Information Systems in Healthcare. Case study - an Obstetrics-Gynecology Department
Creators: name: Crisan-Vida, M.
name: Stoicu-Tivadar, L.
name: Lupse, O.
name: Blobel, Bernd
name: Bernad, E.
Publisher: name: Universität Regensburg
Year: 2013
Subjects: subject: Model, Obstetrics-Gynecology Department Information System, HL7 CDA, GCM, model, Business Process Mo- deling and Notation, interoperability
subject: 610 Medizin

description: Objectives: The paper presents a framework and tools for developing models useful for implementing complex Information Systems. It presents a case study for an Obstetrics-Gynecology Department and connected departments. The advantages of using models for creating complex OGD Information Systems together with a standardized communication will lead to an advanced interoperability and also will have benefits in patient care and in time will reduce the medical errors. Methods: This paper presents the modeling process using the Generic Component Model (GCM) in four steps. The real OGD system is described based on the five RM-ODP (Reference Model of Open Distributed Processing) views. The paper presents the Obstetrics-Gynecology De- partment model based on the real workflow using Business Process Modeling and Notation and a specialized software - Bizagy. Communication between OGD and other medi- cal units is based on HL7 Clinical Document Architecture CDA. The Obstetrics-Gynecology Department Information System (OGD IS) is developed based on the model, in Vi- sual Studio.NET 2010, using ASP.NET pages and C] language, and Microsoft SQL Server 2008. Results: The paper presents a model represented with Business Process Modeling and Notation and its possibili- ties to offer support for software developers to create flexible and portable information systems. Based on the workflow in the OGD, including the communication between OGD and other medical units, was developed a model and consequently the OGD IS. Conclusions: For the future, the OGD IS will be extended with new functionalities: possibilities to introduce medication related to a Database in the cloud to receive suggested treatments. The advantages of using the OGD IS are reflected in a better patient care, and the treatments will be more documented which will determine less medical errors.
Example of an explicit function for confining classical Yang-Mills fields with quantum fluctuations in the path integral scheme
Creators: name: Fukushima, Kimichika
name: Sato, Hikaru
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: This article reports an explicit function form for confining classical Yang-Mills vector potentials and quantum fluctuations around the classical field. The classical vector potential, which is composed of a confining localized function and an unlocalized function, satisfies the classical Yang-Mills equation. The confining localized function contributes to the Wilson loop, while the unlocalized function makes no contribution to this loop. The confining linear potential between a heavy fermion and antifermion is due to (1) the Lie algebra and (2) the form of the confining localized function which has opposite signs at the positions of the particle and antiparticle along the Wilson loop in the time direction. Some classical confining parts of vector potentials also change sign on inversion of the coordinates of the axis perpendicular to the axis joining the two particles. The localized parts of the vector potentials are squeezed around the axis connecting the two particles, and the string tension of the confining linear potential is derived. Quantum fluctuations are formulated using a field expression in terms of local basis functions in real spacetime. The quantum path integral gives the Coulomb potential between the two particles in addition to the linear potential due to the classical fields.
description: 14 pages; v2:missing factor inserted (Eqs.82,87,89,90);spell/grammar corrected; v3:15 pages; Sect.1, Subsect.3.3 and related descriptions in Subsect.3.1 revised with citations; v4:16 pages;Sect.2 (Subsections 2.1,2.2,2.3), Sect.3, Sect.4 (Subsections 4.1,4.2), and related Sect.1 and References revised; v5:a few typos corrected; to appear in Bulg. J. Phys. 41 (2014) 142-171 (title in BJP changed)
Anticipations of Change: A Socio-Economic Description of a Kentucky County Before Reservoir Construction
Creators: name: Smith, Charles Robert
Publisher: name: Kentucky Water Resources Research Institute, University of Kentucky
Year: 1970

description: Abstract:
In the past the construction of large reservoirs in the United States has been evaluated largely in terms of the economic benefit they bring to the area where they are constructed and to the nation. Where human populations are involved, however, a host of social changes occur, many of which fundamentally alter the way of life of a people.
This report is part of a larger study which aims at analyzing the social costs and benefits of reservoir construction. The project is long range in that studies are to be carried out before, during, and after construction. This report concentrates on the social and economic description of a rural county before reservoir construction by the United States Corps of Engineers.
The major findings in this study point to the preconstruction impact that the reservoir has on people. It was found that the very idea of a potential reservoir affects the integration of a community and differentially affects the individuals within that community. Finally, this study emphasizes the need for social science research in planned change programs such as the construction of reservoirs in populated areas.
Funding information: The work upon which this report is based was supported by funds provided by the United States Department of the Interior, Office of Water Resources Research, as authorized under the Water Resources Research Act of 1964, as OWRR Project No. A-022-KY, Agreement No. 14-01-001-1636.
Threshold resummation at N$^3$LL accuracy and soft-virtual cross sections at N$^3$LO
Creators: name: Catani, S.
name: Cieri, L.
name: de Florian, D.
name: Ferrera, G.
name: Grazzini, M.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We consider QCD radiative corrections to the production of colourless high-mass systems in hadron collisions. We show that the recent computation of the soft-virtual corrections to Higgs boson production at N$^3$LO [1] together with the universality structure of soft-gluon emission can be exploited to extract the general expression of the hard-virtual coefficient that contributes to threshold resummation at N$^3$LL accuracy. The hard-virtual coefficient is directly related to the process-dependent virtual amplitude through a universal (process-independent) factorization formula that we explicitly evaluate up to three-loop order. As an application, we present the explicit expression of the soft-virtual N$^3$LO corrections for the production of an arbitrary colourless system. In the case of the Drell-Yan process, we confirm the recent result of Ref.[2].
description: Slightly expanded text, one reference added, version published on NPB
PyQtGraph - High Performance Visualization for All Platforms
Creators: name: Moore, Ognyan
name: Jessurun, Nathan
name: Nemitz, Nils
name: Chase, Martin
name: Campagnola, Luke
Publisher: name: Zenodo
Year: 2023
Subjects: Plotting
Interactivity
Qt
Graphics
GUI

description: Showcases the PyQtGraph plotting library and the kinds of scientific visualizations it enables. It's core attributes are highlighted, namely it's speed, python operability, extensibility, and integrability with larger applications.
Η μετανάστευση ως ζήτημα ασφάλειας και μέσο στρατηγικής
Creators: name: Καρούζος, Μάριος-Αναστάσιος
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2022
Subjects: subject: Μεταναστευτικό
subject: Ασφάλεια
subject: Ασφαλειοποίηση
subject: Εργαλειοποίηση
subject: Στρατηγική

description: Σκοπός της παρούσας διπλωματικής εργασίας είναι να αναδειχθεί η σχέση μεταξύ των εννοιών της μετανάστευσης, της ασφάλειας και της στρατηγικής. Φιλοδοξεί να αναδείξει τον τρόπο με τον οποίο η σχέση αυτή επηρεάζει και διαμορφώνει τις πολιτικές των κρατών (εσωτερικές και εξωτερικές) αλλά και τις διακρατικές σχέσεις. Μέσω της εκτενούς ανάλυσης των εννοιών αυτών, παρουσιάζονται οι βασικές συνιστώσες τους σε επίπεδο Ευρωπαϊκής Ένωσης, μέσω των ευρωπαϊκών συνθηκών, αλλά και στην περίπτωση της Ελλάδας. Στις ενότητες που περιλαμβάνονται αποτυπώνονται οι προκλήσεις που γεννά για την ασφάλεια το μεταναστευτικό φαινόμενο, όπως είναι η τρομοκρατία και η άνοδος της ακροδεξιάς ιδεολογίας σε κοινωνικό αλλά και πολιτικό επίπεδο, καθώς επίσης και τον τρόπο με τον οποίο τα κράτη εργαλειοποιούν το μεταναστευτικό με απώτερο σκοπό την επίτευξη συγκεκριμένων οικονομικών, πολιτικών και λοιπών επιδιώξεων. Ολοκληρώνοντας την ανάλυση, η εργασία οδηγείται στην παρουσίαση ενός χρονοδιαγράμματος των Ευρω-τουρκικών σχέσεων μέχρι και την κοινή δήλωση των δύο πλευρών αναφορικά με το μεταναστευτικό (EU-Turkey Statement), επικεντρώνοντας την ανάλυση στην στάση που διατηρεί η Τουρκία απέναντι σε Ευρώπη και Ελλάδα, επιστρατεύοντας το μεταναστευτικό ως μέσο άσκησης πίεσης. Στο τελευταίο κεφάλαιο της εργασίας παρουσιάζονται μια σειρά συμπερασμάτων αναφορικά με την εργαλειοποίηση του προσφυγικού τόσο στο εσωτερικό όσο και στο εξωτερικό της Ευρωπαϊκής Ένωσης, ενώ παράλληλα πραγματοποιείται μια προσπάθεια ανάδειξης της εύθραυστης κατάστασης που εμφανίζει το μεταναστευτικό στην Ελλάδα καθώς και μελλοντικών προκλήσεων που πιθανώς κάνουν την εμφάνισή τους, λαμβάνοντας υπόψιν την μεταβατική περίοδο που διανύει η χώρα μας.
Computing subsignatures of systems with exchangeable component lifetimes
Creators: name: Marichal, Jean-Luc
Publisher: name: arXiv
Year: 2014
Subjects: subject: Probability (math.PR)
subject: Statistics Theory (math.ST)
subject: FOS: Mathematics
subject: 62N05, 90B25, 94C10

description: The subsignatures of a system with continuous and exchangeable component lifetimes form a class of indexes ranging from the Samaniego signature to the Barlow-Proschan importance index. These indexes can be computed through explicit linear expressions involving the values of the structure function of the system. We show how the subsignatures can be computed more efficiently from the reliability function of the system via identifications of variables, differentiations, and integrations.
title: Συστήματα αναγνώρισης προσώπου με χρήση τεχνητής νοημοσύνης και ζητήματα προστασίας δεδομένων προσωπικού χαρακτήρα
title: Artificial Intelligence-powered facial recognition systems and emerging data protection issues
titleType: AlternativeTitle
Creators: name: Αθανασοπούλου, Δανάη-Διονυσία
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2022
Subjects: subject: Συστήματα αναγνώρισης προσώπου
subject: Τεχνητή νοημοσύνη
subject: Βιομετρικά δεδομένα
subject: Προστασία δεδομένων προσωπικού χαρακτήρα
subject: Γενικός Κανονισμός Προστασίας Δεδομένων Προσωπικού Χαρακτήρα (ΕΕ) 2016/679
subject: Οδηγία (ΕΕ) 2016/680

description: Η αστραπιαία εξάπλωση των συστημάτων αναγνώρισης προσώπου, κατόπιν της ενδυνάμωσης αυτών με εφαρμογές τεχνητής νοημοσύνης, κατέστησε άμεσα αντιληπτή τη δυναμική της τεχνολογίας, αλλά και την εγγενώς παρεμβατική φύση της για τα θεμελιώδη δικαιώματα και τις ελευθερίες των ανθρώπων στις σύγχρονες δημοκρατικές κοινωνίες. Το παρόν πόνημα εκκινεί με την επισκόπηση της τεχνολογίας αναγνώρισης προσώπου, των ιδιαιτέρων χαρακτηριστικών και της εμβέλειας χρήσης της. Στη συνέχεια επιχειρείται η επισήμανση των ανεγειρόμενων ανησυχιών, όπως προκύπτουν από τα τρωτά σημεία της τεχνολογίας, αλλά και των επαπειλούμενων επιπτώσεων στα θεμελιώδη ανθρώπινα δικαιώματα, με ιδιαίτερη έμφαση στους νέους και πρωτοφανώς έντονους κινδύνους που απειλούν να κλονίσουν στον πυρήνα του το δικαίωμα στην προστασία δεδομένων προσωπικού χαρακτήρα. Ακολουθεί η αποτίμηση του ισχύοντος νομικού πλαισίου της Ευρωπαϊκής Ένωσης, σε πρωτογενές και δευτερογενές επίπεδο, και η ειδικότερη εξέταση της συμβατότητας της ανάπτυξης και χρήσης των συστημάτων αναγνώρισης προσώπου με τις αρχές και τα προαπαιτούμενα που θέτει το κοινοτικό κεκτημένο για την προστασία των δεδομένων προσωπικού χαρακτήρα. Τέλος, αναλύεται επικουρικά το προταθέν σχέδιο Κανονισμού της Ευρωπαϊκής Επιτροπής για την Τεχνητή Νοημοσύνη, στο βαθμό που ενδέχεται να συνδιαμορφώσει το ρυθμιστικό πλαίσιο της τεχνολογίας αναγνώρισης προσώπου στην Ευρωπαϊκή Ένωση.
Improved Moving Puncture Gauge Conditions for Compact Binary Evolutions
Creators: name: Etienne, Zachariah B.
name: Baker, John G.
name: Paschalidis, Vasileios
name: Kelly, Bernard J.
name: Shapiro, Stuart L.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Robust gauge conditions are critically important to the stability and accuracy of numerical relativity (NR) simulations involving compact objects. Most of the NR community use the highly robust---though decade-old---moving-puncture (MP) gauge conditions for such simulations. It has been argued that in binary black hole (BBH) evolutions adopting this gauge, noise generated near adaptive-mesh-refinement (AMR) boundaries does not converge away cleanly with increasing resolution, severely limiting gravitational waveform accuracy at computationally feasible resolutions. We link this noise to a sharp (short-wavelength), initial outgoing gauge wave crossing into progressively lower resolution AMR grids, and present improvements to the standard MP gauge conditions that focus on stretching, smoothing, and more rapidly settling this outgoing wave. Our best gauge choice greatly reduces gravitational waveform noise during inspiral, yielding less fluctuation in convergence order and $\sim 40%$ lower waveform phase and amplitude errors at typical resolutions. Noise in other physical quantities of interest is also reduced, and constraint violations drop by more than an order of magnitude. We expect these improvements will carry over to simulations of all types of compact binary systems, as well as other $N$+1 formulations of gravity for which MP-like gauge conditions can be chosen.
description: 25 pages, 16 figures, 2 tables. Matches published version
Development of a programmable magnetic agitation device to maintain colloidal suspension of cells during microfluidic syringe pump perfusion
Creators: name: Puttrich, Tommy
name: O’Donnell, Steven
name: Wong, Sing-Wan
name: Kotche, Miiri
name: Felder, Anthony E
name: Shin, Jae-Won
Publisher: name: University of Illinois at Chicago
Year: 2023
Subjects: Uncategorized

description: Droplet-based microfluidic devices have been used to achieve homogeneous cell encapsulation, but cells sediment in a solution, leading to heterogeneous products. In this technical note, we describe automated and programmable agitation device to maintain colloidal suspensions of cells. We demonstrate that the agitation device can be interfaced with a syringe pump for microfluidic applications. Agitation profiles of the device were predictable and corresponded to device settings. The device maintains the concentration of cells in an alginate solution over time without implicating cell viability. This device replaces manual agitation, and hence is suitable for applications that require slow perfusion for a longer period of time in a scalable manner.
Scattering and reflection positivity in relativistic Euclidean quantum mechanics
Creators: name: Polyzou, W. N.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mathematical Physics (math-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: In this paper I discuss a formulation of relativistic few-particle scattering theory where the dynamical input is a collection of reflection-positive Euclidean covariant Green functions. This formulation of relativistic quantum mechanics has the advantage that all calculations can be performed using Euclidean variables. The construction of the Hilbert space inner product requires that the Green functions are reflection positive, which is a non-trivial constraint on the dynamics. In this paper I discuss the structure of reflection positive Green functions. I show that scattering wave operators exist when the dynamics is given by a Green function with the structure discussed in this work. Techniques for computing scattering observables in this Euclidean framework are discussed.
description: 19 pages
Programmed Cell Death in the Eradication of HIV-1 Infected Cells by the Oncolytic Maraba Virus MG1
Creators: name: Magro, Megan
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2023
Subjects: HIV
infectious disease
virology
oncolytic viruses

description: Since the start of the HIV/AIDS epidemic in 1981, 75.7 million people have become infected with HIV, and 32.7 million have died as a result. Fortunately, life-saving treatment regimens have been developed. Combination antiretroviral therapy (cART) is effective at reducing viral load to an undetectable range, thus preventing transmission of HIV. However, cART is not a cure. Latent and persistent viral reservoirs persist in vivo, and act as pools of infectious virus capable of re-activation if cART is abrogated. In the present work, we investigate the use of an oncolytic virus called MG1, which is capable of targeting and killing HIV infected CD4+ T cells and macrophages in vitro. We sought to determine the mechanism of cell death induced by MG1 to kill HIV infected cells. Our results indicate that MG1-induced cell death of HIV infected cell lines, is independent of caspases, and that caspase 3 and 7 activity is downregulated in HIV infected cell lines. We also determined that HIV infected primary monocyte-derived macrophages are preferentially killed by MG1 over the uninfected bystander cells. Ultimately, these results provide important insight towards how MG1 kills HIV infected cells in vitro, and together with future work, we hope to become one step closer to a potential cure for HIV.
Analyse the uncertainty of your system Sensitivity Analysis in Python with scipy.stats.sobol_indices
Creators: name: Roy, Pamphile T.
Publisher: name: Zenodo
Year: 2023
Subjects: SciPy
Sensitivity Analysis

description: The study of uncertainties can provide invaluable insights on a system or model. A central question is: what parameter of my system is the most important. This is sensitivity analysis and the Sobol’ indices are helping answer this question. Thanks to new developments in SciPy, there is now a function for that: scipy.stats.sobol_indices. This method has been successfully used to analyse systems in various fields, enabling practicionners make critical decisions: Can I neglect this parameter? Is it more important than my other parameters? Can I give it a ranking? Can I explain my machine learning model’s parameters?
Point and generalized symmetries of the heat equation revisited
Creators: name: Koval, Serhii D.
name: Popovych, Roman O.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Analysis of PDEs (math.AP)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 35K05, 35B06, 35A30

description: We derive a nice representation for point symmetry transformations of the (1+1)-dimensional linear heat equation and properly interpret them. This allows us to prove that the pseudogroup of these transformations has exactly two connected components. That is, the heat equation admits a single independent discrete symmetry, which can be chosen to be alternating the sign of the dependent variable. We introduce the notion of pseudo-discrete elements of a Lie group and show that alternating the sign of the space variable, which was for a long time misinterpreted as a discrete symmetry of the heat equation, is in fact a pseudo-discrete element of its essential point symmetry group. The classification of subalgebras of the essential Lie invariance algebra of the heat equation is enhanced and the description of generalized symmetries of this equation is refined as well. We also consider the Burgers equation because of its relation to the heat equation and prove that it admits no discrete point symmetries. The developed approach to point-symmetry groups whose elements have components that are linear fractional in some variables can directly be extended to many other linear and nonlinear differential equations.
description: 22 pages, extended version, the application of an approach from arXiv:2205.13526 to the heat equation
Ενεργειακή μετάβαση, βιωσιμότητα και στρατηγικό management : ποιος ο αντίκτυπος αυτών, στη διεθνή ενεργειακή σκηνή
Creators: name: Τσαρούχα, Μαρία
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2022
Subjects: subject: Ενεργειακή μετάβαση
subject: Βιώσιμη ανάπτυξη
subject: Στρατηγικό μάνατζμεντ
subject: Ενέργεια
subject: Ανατολική Μεσόγειος
subject: Διεθνείς σχέσεις

description: Η παρούσα διπλωματική εργασία εστιάζει στην τρέχουσα ενεργειακή μετάβαση, που ταλανίζει τα κράτη, τις διπλωματικές τους σχέσεις, την αλληλεξάρτηση μεταξύ τους, καθώς και ενεργειακές εταιρίες που έχουν καθοριστικό ρόλο διεθνώς. Ο Διεθνής Οργανισμός Ενέργειας- IEA, με το World Energy Outlook 2021, προειδοποίησε ότι «η ενεργειακή μετάβαση είναι υπερβολικά αργή και ο κόσμος θα υποστεί τις κλιματικές αλλαγές, αλλά και "αναστάτωση" όσον αφορά τον ενεργειακό εφοδιασμό, αν δεν επενδύσει πιο μαζικά και γρήγορα σε πηγές καθαρής ενέργειας»1. Στόχος είναι να αναδειχθεί η πορεία και τα βήματα που ακολουθούνται, όσον αφορά την έναρξη των συνομιλιών μεταξύ των κρατών και των διεθνών οργανισμών, η ανάδειξη του ρόλου της ενεργειακής ασφάλειας και διπλωματίας και τελικώς, η ενσωμάτωση των συμφωνηθέντων από τις αρμόδιες εταιρίες. Ακόμη, η παρούσα διπλωματική εργασία αναδεικνύει τα οφέλη και το ποσοστό ένταξης, των άμεσα ενδιαφερόμενων εταιριών, στους Στόχους Βιώσιμης Ανάπτυξης και την ενσωμάτωση των Βιώσιμων Πρακτικών στην κύρια στρατηγική και λειτουργία τους. Η Βιώσιμη Ανάπτυξη έχει έρθει ώστε να καλύψει ένα μεγάλο κενό, της άκρατης οικονομικής μεγέθυνσης που πρόκυπτε ανά τα χρόνια. Σχετίζεται με το πόσο δίκαια είναι η μεγέθυνση και κατά πόσο αφορά το σύνολο του πληθυσμού αλλά και τον περιβαλλοντικό αντίκτυπο της εκάστοτε εταιρίας. Θεωρείται επομένως, εκείνη που ικανοποιεί τις ανάγκες του σήμερα, χωρίς να θέτει σε αμφισβήτηση την ικανότητα των επόμενων γενεών να ικανοποιήσουν τις δικές τους. Η Βιώσιμη Ανάπτυξη όμως δεν θα μπορούσε να είναι εφαρμόσιμη, χωρίς τη χρήση του Στρατηγικού Management, για το οποίο πραγματοποιείται εκτενής ανάλυση και αναφορά, σχετικά με τα στάδια υιοθέτησης και ενσωμάτωσης του.
Phonon Bandgap Engineering of Strained Monolayer MoS2
Creators: name: Jiang, Jin-Wu
Publisher: name: arXiv
Year: 2014
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The phonon band structure of monolayer MoS2 is characteristic for a large energy gap between acoustic and optical branches, which protects the vibration of acoustic modes from being scattered by optical phonon modes. Therefore, the phonon bandgap engineering is of practical significance for the manipulation of phonon-related mechanical or thermal properties in monolayer MoS2. We perform both phonon analysis and molecular dynamics simulations to investigate the tension effect on the phonon bandgap and the compression induced instability of the monolayer MoS2. Our key finding is that the phonon bandgap can be narrowed by the uniaxial tension, and is completely closed at epsilon=0.145; while the biaxial tension only has limited effect on the phonon bandgap. We also demonstrate the compression induced buckling for the monolayer MoS2. The critical strain for buckling is extracted from the band structure analysis of the flexure mode in the monolayer MoS2 and is further verified by molecular dynamics simulations and the Euler buckling theory. Our study illustrates the uniaxial tension as an efficient method for manipulating the phonon bandgap of the monolayer MoS2, while the biaxial compression as a powerful tool to intrigue buckling in the monolayer MoS2.
description: Nanoscale, published
2000-Armson-Cockroft-Stone-Modelling a barnacle goose population
Creators: name: Armson, R
Publisher: name: QUBES Educational Resources
Year: 2023

description: This paper explores a number of models for the growth of a barnacle goose population. These geese spend their summers breeding in Spitsbergen and then winter in Caerlaverock on the Solway Firth. The population growth is modelled using exponential models.
Application of a polynomial sieve: beyond separation of variables
Creators: name: Bonolis, Dante
name: Pierce, Lillian B.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics

description: Let a polynomial $f \in \mathbb{Z}[X_1,\ldots,X_n]$ be given. The square sieve can provide an upper bound for the number of integral $\mathbf{x} \in [-B,B]^n$ such that $f(\mathbf{x})$ is a perfect square. Recently this has been generalized substantially: first to a power sieve, counting $\mathbf{x} \in [-B,B]^n$ for which $f(\mathbf{x})=y^r$ is solvable for $y \in \mathbb{Z}$; then to a polynomial sieve, counting $\mathbf{x} \in [-B,B]^n$ for which $f(\mathbf{x})=g(y)$ is solvable, for a given polynomial $g$. Formally, a polynomial sieve lemma can encompass the more general problem of counting $\mathbf{x} \in [-B,B]^n$ for which $F(y,\mathbf{x})=0$ is solvable, for a given polynomial $F$. Previous applications, however, have only succeeded in the case that $F(y,\mathbf{x})$ exhibits separation of variables, that is, $F(y,\mathbf{x})$ takes the form $f(\mathbf{x}) - g(y)$. In the present work, we present the first application of a polynomial sieve to count $\mathbf{x} \in [-B,B]^n$ such that $F(y,\mathbf{x})=0$ is solvable, in a case for which $F$ does not exhibit separation of variables. Consequently, we obtain a new result toward a question of Serre, pertaining to counting points in thin sets.
description: 33 pages; updated exposition to final version
Bosonic (p - 1)-forms in Einstein-Cartan theory of gravity
Creators: name: Alfaro, Jorge
name: Riquelme, Simon
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We introduce bosonic (p - 1)-form fields that couple to the spin connection of the Einstein-Cartan theory of gravity thus becoming a non-trivial source of space-time torsion. We analyze all the general features of both the matter and the gravitational sectors of the theory. Finally we briefly consider the implications of the existence of such fields in different physical settings.
description: 14 pages
RESILIENT ARCHITECTURES THROUGH DYNAMIC MANAGEMENT OF SOFTWARE COMPONENTS
Creators: name: Hristozov, Anton D
Publisher: name: Purdue University Graduate School
Year: 2023
Subjects: Software architecture
Software and application security
Software engineering not elsewhere classified
Automated software engineering

description: This work explores the topic of dynamic systems built through software components. It proposes component interface standardization and a methodology for designing and deploying dynamic systems. It also proposes a specialized architecture description language to achieve the goals of run-time dynamic control of system of systems (SoS). The work is based on several related publications.
Determinación de la circulación en la Bahía de Campeche mediante un modelo inverso /
Creators: name: Colunga Enriquez, Gerardo
Publisher: name: Universidad Autónoma de Baja California.
Year: 2022
Subjects: subject: GC281 .C3 C65 1990

description: Basados en un modelo inverso lineal en diferencias finitas se hace evaluación de la circulación residual en una región de Bahía de Campeche.
Yori: A New, Highly Customizable Tool for Level-3 Data Production
Creators: name: Veglio, Paolo
name: Holz, Robert
name: Gumley, Liam
name: Dutcher, Steve
name: Quinn, Greg
name: Flynn, Bruce
Publisher: name: Zenodo
Year: 2023

description: Yori is a highly customizable, sensor-agnostic software, developed to support the NASA Atmosphere Science Teams, to spatially/temporally resample geophysical variables from satellite measurements. Out of the box this software outputs common statistics, such as mean, standard deviation and pixel count, of each geophysical variable read, for every grid cell. Additionally, Yori allows users to easily produce additional statistics (e.g. histograms, min/max, median) and filter data to create custom outputs while maintaining a CF-compliant format. Yori has been designed to be easily scalable on a distributed computing environment."
Your very private job agency: Job referrals based on residential location networks
Creators: name: Hawranek, Franziska
name: Schanne, Norbert
Publisher: name: Universität Regensburg
Year: 2015
Subjects: subject: Job referrals, Labor market, Neighborhood effects, Network effects, Social interaction
subject: 330 Wirtschaft

description: This paper analyzes job referral effects that are based on residential location. We use geo-referenced record data for the entire working population and the corresponding establishments in the German Rhine-Ruhr metropolitan area. We estimate the propensity of two persons to work at the same place when residing in the same neighborhood (reported with an accuracy of 500m×500m grid cells), and compare the effect to people living in adjacent neighborhoods. We find a significant increase in the probability of working together when living in the same neighborhood, which is stable across various specifications. We differentiate these referral effects for socioeconomic groups and find especially strong effects for migrant groups from former guest-worker countries and new EU countries. Further, we investigate a number of issues in order to deepen the insight on actual job referrals: distinguishing between the effects on working in the same neighborhood and working in the same establishment - probably the more accurate measure for job referrals - shows that the latter yield larger relative effects. Besides, we find that clusters in employment although having a significant positive effect play only a minor role for the magnitude of the referral effect. We find evidence that informal job markets play the biggest role in small firms and are least important in large firms. When we exclude short distance commuters, we find the same probabilities of working together, which reinforces our interpretation of this probability as a network effect.
High-Tc Superconductivity near the Anion Height Instability in Fe-based Superconductors: Analysis of LaFeAsO$_{1-x}$H$_x$
Creators: name: Onari, Seiichiro
name: Yamakawa, Youichi
name: Kontani, Hiroshi
Publisher: name: arXiv
Year: 2013
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The isostructural transition in the tetragonal phase, with sizable change in the anion-height, is realized in heavily H-doped LaFeAsO and (La,P) co-doped CaFe$_2$As$_2$. In these compounds, the superconductivity with higher-Tc (40~50 K) is realized near the isostructural transition. To reveal the origin of the anion-height instability and its important role in realizing the higher-Tc state, we develop the orbital-spin fluctuation theory by including the vertex correction. It is found that the non-nematic orbital fluctuations, which induce the anion-height instability, can develop near the magnetic quantum critical point, in addition to the conventional nematic orbital fluctuations. The non-nematic orbital order triggers the isostructural transition, and its fluctuation would be a key ingredient to realize higher-Tc superconductivity of order 50 K.
description: 7 pages, 7 figures, figure 4 (c) revised, to be published in PRL
Riemannian optimization of photonic quantum circuits in phase and Fock space
Creators: name: Yao, Yuan
name: Miatto, Filippo
name: Quesada, Nicolás
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We propose a framework to design and optimize generic photonic quantum circuits composed of Gaussian objects (pure and mixed Gaussian states, Gaussian unitaries, Gaussian channels, Gaussian measurements) as well as non-Gaussian effects such as photon-number-resolving measurements. In this framework, we parametrize a phase space representation of Gaussian objects using elements of the symplectic group (or the unitary or orthogonal group in special cases), and then we transform it into the Fock representation using a single linear recurrence relation that computes the Fock amplitudes of any Gaussian object recursively. We also compute the gradient of the Fock amplitudes with respect to phase space parameters by differentiating through the recurrence relation. We can then use Riemannian optimization on the symplectic group to optimize M-mode Gaussian objects, avoiding the need to commit to particular realizations in terms of fundamental gates. This allows us to "mod out" all the different gate-level implementations of the same circuit, which now can be chosen after the optimization has completed. This can be especially useful when looking to answer general questions, such as bounding the value of a property over a class of states or transformations, or when one would like to worry about hardware constraints separately from the circuit optimization step. Finally, we make our framework extendable to non-Gaussian objects that can be written as linear combinations of Gaussian ones, by explicitly computing the change in global phase when states undergo Gaussian transformations. We implemented all of these methods in the freely available open-source library MrMustard, which we use in three examples to optimize the 216-mode interferometer in Borealis, and 2- and 3-modes circuits (with Fock measurements) to produce cat states and cubic phase states.