cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Παραμετροποίηση συνθηκών σύνθεσης μεσοπορωδών νανοφορέων με βάση την πυριτία
Creators: name: Παπαμαρίνου Χρυσάνθη Χριστόδουλου
Publisher: name: Aristotle University of Thessaloniki
Year: 2022
Subjects: Μεσοπορώδη Νανοσωματίδια
Ιόντα δημητρίου
Mesoporous Nanoparticles
MCM-41
Cerium ions

description: Στην παρούσα εργασία πραγματοποιήθηκε η διερεύνηση των βέλτιστων συνθηκών σύνθεσης μεσοπορωδών νανοφορέων με βάση την πυριτία τύπου MCM-41. Η σύνθεση των μεσοπορωδών νανοφορέων πραγματοποιήθηκε με την μέθοδο της sol-gel (τεχνική κολλοειδούς γέλης) και διερευνήθηκε η παραμετροποίηση των συνθηκών σύνθεσης. Ο χαρακτηρισμός των φυσικοχημικών ιδιοτήτων των νανοφορέων πραγματοποιήθηκε με τις τεχνικές Φασματοσκοπία Υπερύθρου με Μετασχηματισμό Fourier (FTIR), Περίθλαση Ακτίνων – Χ (XRD), Ηλεκτρονική Μικροσκοπία Σάρωσης – Φασματοσκοπία ενεργειακής διασποράς (SEM/EDS), Ποροσιμετρία Αζώτου (BET&BJH) και Φασματοσκοπία Φωτοηλεκτρονίων από Ακτίνες – Χ (XPS). Επιπλέον, πραγματοποιήθηκε η διερεύνηση του φορτίου της επιφάνειας τους με μετρήσεις του ζ-δυναμικού. Σε επόμενο στάδιο οι βέλτιστοι πιθανοί νανοφορείς, εμπλουτίστηκαν με ιόντα δημητρίου και αφού πραγματοποιήθηκε ο χαρακτηρισμός τους, μελετήθηκε η βιολογική συμπεριφορά τους διερευνώντας τη βιοσυμβατότητα και την αιμοσυμβατότητα τους σε επαφή με περιοδοντικούς ινοβλάστες και ερυθρά αιμοσφαίρια αντίστοιχα
description: This study was focused on the optimum conditions for the synthesis of silica-based mesoporous nanocarriers MCM-41 type (Mobil Composition of Matter No. 41). The synthesis of mesoporous nanoparticles was performed with the sol-gel technique and different synthesis parameters were investigated. The characterization of physicochemical properties of the nanocarriers was carried out with the techniques: Fourier Transform Infrared Spectroscopy (FTIR), X-Ray Diffraction (XRD), Scanning Electron Microscopy and Energy Dispersive Spectroscopy (SEM/EDS), Nitrogen Adsorption Porosimetry (BET&BJH) and X-ray photoelectron spectroscopy (XPS). In addition, their charge was investigated with ζ-potential measurements. The optimum mesoporous silicate nanoparticles were selected for doping with cerium ions, and after their characterization, their biological behavior was studied. Biocompatibility and hemocompatibility tests were performed on periodontal fibroblasts and red blood cells, respectively
Minimizing statistical and systematic bias in transverse momentum correlations for relativistic heavy-ion collisions
Creators: name: Ray, Robert L.
name: Bhattarai, Prabhat
Publisher: name: arXiv
Year: 2016
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Two-particle correlation measurements and analysis are an important component of the relativistic heavy-ion physics program. In particular, particle pair-number correlations on two-dimensional transverse momentum ($p_t$) allow unique access to soft, semi-hard and hard-scattering processes in these collisions. Precise measurements of this type of correlation are essential for understanding the dynamics in heavy-ion collisions. However, transverse momentum correlation measurements are especially vulnerable to statistical and systematic biases. In this paper the origins of these large bias effects are explained and mathematical correlation forms are derived from mean-$p_t$ fluctuation quantities in the literature. Monte Carlo simulations are then used to determine the conditions, e.g. multiplicity and collision centrality bin widths, where each correlation form is minimally biased. The ranges of applicability for each correlation quantity are compared. Several are found to reproduce the assumed input correlations with reasonable fidelity over a wide range of conditions encountered in practical analysis of data.
description: 23 pages, 7 figures
POET: A Self-learning Framework for PROFINET Industrial Operations Behaviour
Creators: name: Meshram, Ankush
name: Karch, Markus
name: Haas, Christian
name: Beyerer, Jürgen
Publisher: name: arXiv
Year: 2023
Subjects: subject: Cryptography and Security (cs.CR)
subject: Artificial Intelligence (cs.AI)
subject: Networking and Internet Architecture (cs.NI)
subject: Systems and Control (eess.SY)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Since 2010, multiple cyber incidents on industrial infrastructure, such as Stuxnet and CrashOverride, have exposed the vulnerability of Industrial Control Systems (ICS) to cyber threats. The industrial systems are commissioned for longer duration amounting to decades, often resulting in non-compliance to technological advancements in industrial cybersecurity mechanisms. The unavailability of network infrastructure information makes designing the security policies or configuring the cybersecurity countermeasures such as Network Intrusion Detection Systems (NIDS) challenging. An empirical solution is to self-learn the network infrastructure information of an industrial system from its monitored network traffic to make the network transparent for downstream analyses tasks such as anomaly detection. In this work, a Python-based industrial communication paradigm-aware framework, named PROFINET Operations Enumeration and Tracking (POET), that enumerates different industrial operations executed in a deterministic order of a PROFINET-based industrial system is reported. The operation-driving industrial network protocol frames are dissected for enumeration of the operations. For the requirements of capturing the transitions between industrial operations triggered by the communication events, the Finite State Machines (FSM) are modelled to enumerate the PROFINET operations of the device, connection and system. POET extracts the network information from network traffic to instantiate appropriate FSM models (Device, Connection or System) and track the industrial operations. It successfully detects and reports the anomalies triggered by a network attack in a miniaturized PROFINET-based industrial system, executed through valid network protocol exchanges and resulting in invalid PROFINET operation transition for the device.
description: To be published in the proceedings of EAI TRIDENTCOM 2022
Determinants of Hospital Cost in Addis Ababa
Creators: name: Mohammed, Abduleletif
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2007

description: Background: The share of public sector health resources in developing countries consumed by hospitals ranges from 50 to 80 percent. Multiple constraints and expanding demands have revealed the limits of governments' reach and so reducing the role of the government, enhancing that of the private sector, or both, are policy questions based on the notion that private ownership entails mechanisms which promote economic efficiency. In order to promote economic efficiency and to decide which outputs are best delivered in hospitals and to examine the trade-offs between various services, it is helpful to know how hospital cost functions are influenced by output levels and other variables. Objective: The objective of this study was to identify and estimate the effects of determinants of costs for a sample of government and private hospitals in Addis Ababa. Methods: A cross sectional study was conducted from Jan 2007 – March 2007 in Addis Ababa with in purposively selected hospitals. All facilities with complete information on the study variables for the financial years 2003-2005 were considered. This gave a sample of 30 hospitals generating 41 observations for assessing the determinants of costs. Interview with key informants and document review were conducted. Translog – like cost function was specified and estimated using ordinary least squares (OLS). Results: According to the results of the study number of beds and number laboratory tests done had a positive and statistically significant effect on total cost. The volume of outpatient activity, as measured by the number of first outpatient visits to the hospital had a statistically significant and negative impact on total cost. Calculated marginal costs had economies of scale for the number of first outpatient but had diseconomies of scale for the number of vii laboratory tests done. A negative and statistically significant coefficient associated with the interaction term for inpatient and outpatient output indicated the existence of economies of scope between the number of inpatients and the number of first outpatient visits. Conclusion: The results of studies performed on hospital costs in Ethiopia are too limited to provide definitive guidance for policy. However, the estimated results imply that it is efficient to combine outpatient and inpatient care at the same facility and also it is more efficient to have one large hospital rather than two small ones. Additional empirical investigation is warranted
Equation of State for Nucleonic and Hyperonic Neutron Stars with Mass and Radius Constraints
Creators: name: Tolos, Laura
name: Centelles, Mario
name: Ramos, Angels
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We obtain a new equation of state for the nucleonic and hyperonic inner core of neutron stars that fulfills the 2$M_{\odot}$ observations as well as the recent determinations of stellar radii below 13 km. The nucleonic equation of state is obtained from a new parametrization of the FSU2 relativistic mean-field functional that satisfies these latest astrophysical constraints and, at the same time, reproduces the properties of nuclear matter and finite nuclei while fulfilling the restrictions on high-density matter deduced from heavy-ion collisions. On the one hand, the equation of state of neutron star matter is softened around saturation density, which increases the compactness of canonical neutron stars leading to stellar radii below 13 km. On the other hand, the equation of state is stiff enough at higher densities to fulfill the 2$M_{\odot}$ limit. By a slight modification of the parametrization, we also find that the constraints of 2$M_{\odot}$ neutron stars with radii around 13 km are satisfied when hyperons are considered. The inclusion of the high magnetic fields present in magnetars further stiffens the equation of state. Hyperonic magnetars with magnetic fields in the surface of $ \sim 10^{15}$ G and with values of $\sim 10^{18}$ G in the interior can reach maximum masses of 2$M_{\odot}$ with radii in the 12-13 km range.
description: 18 pages, 9 figures, 2 tables, accepted for publication in The Astrophysical Journal
X-ray Studies of Blazar 1ES 1959+650 Using SWIFT & XMM-NEWTON Satellite
Creators: name: Wani, Kiran A
name: Gaur, Haritma
name: Patil, M K
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: High synchrotron energy peaked blazar 1ES 1959+650 is studied with Swift and XMM-Newton satellite in total 127 observations during the period June 2018-December 2020. We extensively studied its flux and spectral variability on intra-day and long-term timescales. Discrete correlation function analysis between soft and hard X-ray bands indicates soft as well as hard lags. The results are used to constrain the magnetic field of the emitting region which is found to be 0.64 (0.05) Gauss. On long-term timescales, distribution of fluxes shows lognormality behaviour which could be attributed to minijets-in-a-jet model or might be due to the propagation of relativistic shocks down the jet. The spectral energy distribution around the synchrotron peak is well described by the log parabola model. Spectral parameters like peak energy E$_{p}$, curvature $β$ and the peak luminosity L$_{p}$ are derived from spectral analysis. Their correlations are studied to constrain the acceleration processes of the emitting particles. E$_{p}$ shows strong correlation with L$_{p}$ during the high state of the source which indicates spectral changes might be caused by the variations of the average electron energy. Low values of curvature parameter $β$ and a weak correlation between E$_{p}$ and $β$ indicates co-existence of stochastic/statistical acceleration of electrons in the emitting region. Implications of other results are also discussed.
description: 14 pages, 6 figures, Accepted for publication in ApJ
Tidally Heated Exomoons around $ε$ Eridani b: Observability and prospects for characterization
Creators: name: Kleisioti, E.
name: Dirkx, D.
name: Rovira-Navarro, M.
name: Kenworthy, M. A.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Exomoons are expected to orbit gas giant exoplanets just as moons orbit solar system planets. Tidal heating is present in solar system satellites and it can heat up their interior depending on their orbital and interior properties. We aim to identify a Tidally Heated Exomoon's (THEM) orbital parameter space that would make it observable in infrared wavelengths with MIRI/JWST around $ε$ Eridani b. We study the possible constraints on orbital eccentricity and interior properties that a successful THEM detection in infrared wavelengths can bring. We also investigate what exomoon properties need to be independently known in order to place these constraints. We use a coupled thermal-tidal model to find stable equilibrium points between the tidally produced heat and heat transported within a moon. For the latter, we consider a spherical and radially symmetric satellite with heat being transported via magma advection in a sub-layer of melt (asthenosphere) and convection in the lower mantle. We incorporate uncertainties in the interior and tidal model parameters to assess the fraction of simulated moons that would be observable with MIRI. We find that a $2 R_{Io}$ THEM orbiting $ε$ Eridani b with an eccentricity of 0.02, would need to have a semi-major axis of 4 planetary Roche-radii for 100% of the simulations to produce an observable moon. These values are comparable with the orbital properties of gas giant solar system satellites. We place similar constraints for eccentricities up to 0.1. We conclude that if the semi-major axis and radius of the moon are known (eg. with exomoon transits), tidal dissipation can constrain the orbital eccentricity and interior properties of the satellite, such as the presence of melt and the thickness of the melt containing sub-layer.
Synthesis and characterisation of non-chiral and chiral side chain liquid crystalline polysiloxanes : a new regio- and diastereoselective approach to the synthesis of anthracyclinones
Creators: name: Kim., Hyun Jun
Publisher: name: Monash University
Year: 2021

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
Socio-Demographic and Behavioral Determinants of Sero-Discordance among Couples Taking HIV Test Dessie (Ethiopia)
Creators: name: Asefa, Wondwossen
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2006

description: Background: There is no room for complacency about AIDS anywhere. It is estimated some 5 million people become infected with HIV per annum. The pandemic is continuing unabated. Though more than 40 million people are living with HIV/AIDS today, we must remember that this epidemic is still in its early stage in many nations. Since the major means of transmission for the virus is heterosexual intercourse, identifying serodiscordant couples/partners through VCT would have paramount importance to mitigate the propagation of the disease. Objective: To assess the prevalence of serodiscordant test result possible socio demographic and behavioral determinants. Assessment of post test reaction of discordant couples & perceived competency of counselors towards couple counseling. Methods: The study was retrospective crossectional study design based on simple random sampling of couples tested for HIV in 2004/5. The Ethiopian Standard VCT client record formats was sorted chronologically to serve as sampling frame. The calculated sample size for the quantitative study was 601couples (1202 individuals). Qualitative data was generated from counselors and peer supervisors to enrich the quantitative data & address issues far fetched quantitatively. Tape recorder and semi structured open-ended questions were used for the qualitative data. Computerized data entry, cleaning and analysis was executed using relevant software packages like SPSS and Open code. Ethical clearance was considered for each step, which mandates to do so. Result: The prevalence of sero discordance was found to be 9.8%. Of all study-subjects, 0.93 % were concordant positive while the remaining 88.3 % were concordant negative. Discordance was more prevalent among previously divorced and separated couples 22.4% & 22.8 % respectively. Married couples found to be significantly discordant than premarital couples, OR= 2.408; 95 % CI (1.26, 4.602); P=008. Conclusion: several socio demographic and behavioral factors were associated with sero discordance for couples. Posttest reactions of couples were so grave, counselors used to face considerable challenges. Key words: Behavioral determinants, HIV/AIDS, seroconcordant, serodiscordant, Sociodemographic determinants, voluntary counseling and testing (VCT)
Artificial circumzenithal and circumhorizontal arcs
Creators: name: Selmke, Markus
name: Selmke, Sarah
Publisher: name: arXiv
Year: 2016
Subjects: subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We revisit a water glass experiment often used to demonstrate a rainbow. On a closer look, it also turns out to be a rather close analogy of a different kind of atmospheric optics phenomenon altogether: The geometry may be used to faithfully reproduce the circumzenithal and the circumhorizontal halos, providing a missing practical demonstration experiment for those beautiful and common natural ice halo displays.
description: 7 pages, 7 figures
Second Stop and Sbottom Searches with a Stealth Stop
Creators: name: Cheng, Hsin-Chia
name: Li, Lingfeng
name: Qin, Qin
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The top squarks (stops) may be the most wanted particles after the Higgs boson discovery. The searches for the lightest stop have put strong constraints on its mass. However, there is still a search gap in the low mass region if the spectrum of the stop and the lightest neutralino is compressed. In that case, it may be easier to look for the second stop since naturalness requires both stops to be close to the weak scale. The current experimental searches for the second stop are based on the simplified model approach with the decay modes $\tilde{t}_2 \to \tilde{t}_1 Z$ and $\tilde{t}_2 \to \tilde{t}_1 h$. However, in a realistic supersymmetric spectrum there is always a sbottom lighter than the second stop, hence the decay patterns are usually more complicated than the simplified model assumptions. In particular, there are often large branching ratios of the decays $\tilde{t}_2 \to \tilde{b}_1 W$ and $\tilde{b}_1 \to \tilde{t}_1 W$ as long as they are open. The decay chains can be even more complex if there are intermediate states of additional charginos and neutralinos in the decays. By studying several MSSM benchmark models at the 14 TeV LHC, we point out the importance of the multi-$W$ final states in the second stop and the sbottom searches, such as the same-sign dilepton and multilepton signals, aside from the traditional search modes. The observed same-sign dilepton excesses at LHC Run 1 and Run 2 may be explained by some of our benchmark models. We also suggest that the vector boson tagging and a new kinematic variable may help to suppress the backgrounds and increase the signal significance for some search channels. Due to the complex decay patterns and lack of the dominant decay channels, the best reaches likely require a combination of various search channels at the LHC for the second stop and the lightest sbottom.
description: 46 pages, 9 figures, updated experimental constraints and benchmark points after the ICHEP2016 data, published in JHEP
Αναλυτική Ποδοσφαίρου
Creators: name: Μυλωνίδης, Αλέξανδρος Θεόφιλου
Publisher: name: Aristotle University of Thessaloniki
Year: 2022
Subjects: Αναμενόμενα τέρματα
Αναλυτική ποδοσφαίρου
Μοντέλα κατηγοριοποίησης
Expected goals
Soccer analytics
Classification models

description: Ο σκοπός της παρούσας διπλωματικής εργασίας είναι ο εντοπισμός του αλγορίθμου κατηγοριοποίησης ο οποίος με σχετική ακρίβεια θα προβλέψει τα αποτελέσματα μιας αγωνιστικής ποδοσφαιρικής περιόδου. Συνολικά, η παρούσα εργασία ασχολείται με την αναλυτική του ποδοσφαίρου και στοχεύει στο κατά πόσον μπορεί να εφαρμοστεί μια πρόβλεψη για τα αποτελέσματα των αγώνων, με την χρήση των xGoals ως χαρακτηριστικό για την μοντελοποίηση των αλγορίθμων κατηγοριοποίησης. Πρώτον, ο αρχικός στόχος ήταν ο εντοπισμός των αναμενόμενων τερμάτων ανά αγώνα, καθώς η αναλυτική ποδοσφαίρου βρίσκεται σε πρώιμο στάδιο και τα δεδομένα περιορίζονται στα βασικά στατιστικά ενός ποδοσφαιρικού αγώνα όπως είναι οι τελικές, τα κόρνερ και τα φάουλ της κάθε ομάδας. Με την κατάλληλη αναζήτηση σε ιστοτόπους που ασχολούνται με το ποδόσφαιρο, αλλά και με διάφορα άλλα αθλήματα, πραγματοποιήθηκε η κατάλληλη εκπαίδευση των αλγορίθμων κατηγοριοποίησης. Κατόπιν, πραγματοποιήθηκε η κατάλληλη σύγκριση μεταξύ των αλγορίθμων, ώστε να βρεθεί εκείνος που έχει την μεγαλύτερη ακρίβεια στην πρόβλεψη δεδομένων με βάση τα στοιχεία τα οποία συλλέχθηκαν. Για να υπάρξει μια πιο καθαρή εικόνα, επιλέχθηκε η προσέγγιση τα δεδομένα να κατηγοριοποιηθούν σε τρείς κατηγορίες ως προς τα τελικά αποτελέσματα των αγώνων, αλλά και στο δυαδικό μοντέλο. Τελικά, αποφασίστηκε ότι μεταξύ των αλγορίθμων GNB, kNN και SVM, αυτός που αποδίδει με μεγαλύτερη ακρίβεια την πρόβλεψη για το τελικό αποτέλεσμα, είναι ο SVM
description: The purpose of this thesis is to identify the classification algorithm which will with relative accuracy, predict the results of a football season. Overall, this paper deals with soccer analytics and aims to see if a match result prediction can be implemented, using xGoals as a feature to model the classification algorithms. First, the first scope was to identify expected goals per match, as soccer analytics is at an early stage and the data is limited to the basic statistics of a football match such as shots, corners and fouls by each team. By properly searching websites dealing with football, but also with various other sports, the appropriate training of the classification algorithms was carried out.Then, an appropriate comparison was made between the algorithms, in order to find the one that has the most accuracy in data prediction based on the data collected. In order to have a clearer picture, the approach was chosen to categorize the data into three categories in terms of the final results of the matches, but also in the binary model. Finally, it was decided that among the GNB, kNN, and SVM algorithms, the one that more accurately predicts the final outcome is SVM
A Census of WISE-selected Dual and Offset AGN Across the Sky: New Constraints on Merger-Driven Triggering of Obscured AGN
Creators: name: Barrows, R. Scott
name: Comerford, Julia M.
name: Stern, Daniel
name: Assef, Roberto J.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Pairs of galaxies hosting active galactic nuclei (AGN) are powerful probes of merger-driven supermassive black hole (SMBH) growth as they can resolve individual AGN and trace mergers over a large range of physical separations. To exploit this on a large scale for the first time for both obscured and unobscured AGN, we use photometric redshifts of AGN selected by the Wide-field Infrared Survey Explorer (WISE) to find probabilistic pairs (<100 kpc separations) across the sky, along with a comparison sample of inactive galaxy pairs. Our final sample of integrated pair probabilities yields 198 AGN-AGN pairs (dual AGN) and 2767 AGN-galaxy pairs (offset AGN) with uniformly measured AGN and host galaxy physical properties. We find the fraction of galaxy pairs hosting WISE AGN is dominated by offset AGN and significantly elevated above that of inactive galaxies for large host stellar masses. We show how the AGN merger fraction directly increases with AGN extinction for both offset and dual AGN, with up to ~40% of heavily obscured AGN found in galaxy pairs. Elevated AGN merger fractions coincide with increased host specific star formation rates that suggest merger-driven co-evolution of galaxies and SMBHs. Among dual AGN, the most rapid SMBH growth may occur within the less massive galaxy. Relative to stochastic mechanisms, mergers produce an excess of AGN at increasingly smaller separations, especially for obscured AGN (up to a factor of ~5), and augmented by correlated triggering. Finally, this excess is stronger than for lower luminosity optically-selected AGN, regardless of AGN obscuration level.
description: 19 pages, 16 figures. Accepted for publication in the Astrophysical Journal
The supply chain if the COVID 19 vaccines in Greece
Creators: name: Βωνιάτη, Αρτεμις Κυριάκου
Publisher: name: Aristotle University of Thessaloniki
Year: 2022
Subjects: κορονοϊός
εφοδιαστική αλυσίδα
εμβόλια
COVID - 19
Supply chain
Vaccines

description: Σκοπός της παρούσας διπλωματικής εργασίας είναι η μελέτη της Εφοδιαστικής Αλυσίδας του εμβολίου COVID-19 στην Ελλάδα. Η πανδημία του κορoνοϊού έχει μετατοπίσει το παγκόσμιο εμπόριο από την εμφάνισή της το 2020. Μεταξύ των οικονομιών που παύουν και η καθημερινή ζωή έχει τεθεί σε αναμονή, η απόλυτη προτεραιότητα μετατοπίστηκε στην Εφοδιαστική και Εφοδιαστική Αλυσίδα των εμβολίων για τον COVID-19 μόλις δόθηκε η έγκριση έκτακτης ανάγκης. Λαμβάνοντας υπόψη το θέμα που εισήχθη στον κόσμο πριν από δύο χρόνια, η υπάρχουσα βιβλιογραφία δεν είναι τόσο εκτεταμένη. Ωστόσο, υπάρχουν οδηγίες και δεδομένα που δημοσιεύονται από πιστοποιημένους οργανισμούς. Η πλειονότητα των μελετών αναφέρεται στις ιδιαιτερότητες αυτής της αλυσίδας εφοδιασμού έναντι της ήδη υπάρχουσας αλυσίδας εφοδιασμού φαρμακευτικών προϊόντων Η μέθοδος έρευνας που χρησιμοποιείται για τη συλλογή πρωτογενών δεδομένων είναι οι ημιδομημένες συνεντεύξεις. Οι συνεντεύξεις πραγματοποιήθηκαν με τέσσερα άτομα που ανήκουν στην Εφοδιαστική Αλυσίδα εμβολίων. Η Μέθοδος Έρευνας με ημιδομημένες συνεντεύξεις έδωσε χώρο για πιο λεπτομερείς πληροφορίες χωρίς να χάνεται ο σκοπός. Μέσα από την ανάλυση των πρωτογενών δεδομένων, προκύπτει ότι η αλυσίδα εφοδιασμού εμβολίων που εφαρμόζεται στην Ελλάδα αποδείχθηκε ότι εξυπηρετεί τον σκοπό, αλλά όχι χωρίς τις προκλήσεις της. Τα ευρήματα της παρούσας διπλωματικής εργασίας συνέβαλαν στη λεπτομερή μελέτη της εφοδιαστικής αλυσίδας του εμβολίου COVID-19 και στην προσπάθεια σύλληψης της Εφοδιαστικής Αλυσίδας εμβολίων στην Ελλάδα
description: The purpose of the current thesis is to study the Supply Chain of the COVID-19 vaccine in Greece. The coronavirus pandemic has shifted the world trade since its appearance in 2020. Among economies pausing and everyday life being put on hold, the absolute priority was shifted to the Logistics and Supply Chain of the COVID-19 vaccines once given the emergency approval. Considering the topic being introduced to the world two years ago the existing literature is not as extended. However, there are guidelines and data published from certified organizations. The majority of the studies are referring to the peculiarities of this supply chain against the already existing pharmaceutical supply chain The Research Method used to collect primary data are semi-structured interviews. The interviews were conducted with four people who are part of the vaccine Supply Chain. The Research Method being semi-structure interviews gave space for more detailed information without losing purpose. Through the analysis of the primary data, it is apparent that the vaccine supply chain applied in Greece proved to be serving the purpose, but not without its challenges. The findings of this thesis have contributed to the detailed study of the supply chain of the COVID-19 vaccine and the attempt to capture the vaccine Supply Chain in Greece
Ab Initio Fermi Surface Calculation for Charge-Density Wave Instability in Transition Metal Oxide Bronzes
Creators: name: Foury-Leylekian, Pascale
name: Pouget, Jean-Paul
name: Ravy, Sylvain
name: Sandre, Eric
Publisher: name: The American Physical Society
Year: 2001
Subjects: subject: 530

description: Physical Review Letters
Ηλεκτρονική διακυβέρνηση: διαχείριση προσωπικών δεδομένων των φορολογικών υποκειμένων
Creators: name: Παπαχατζή Μαρία Νικολάου
Publisher: name: Aristotle University of Thessaloniki
Year: 2022
Subjects: ηλεκτρονική διακυβέρνηση
προσωπικά δεδομένα
διαλειτουργικότητα
e-government
personal data
interoperability

description: Η διπλωματική εργασία έχει ως αντικείμενο τη διαχείριση των προσωπικών δεδομένων των φορολογικών υποκειμένων, όπως αυτά συγκεντρώνονται από τη Διοίκηση μέσα από τις πλατφόρμες των αντίστοιχων υπηρεσιών ηλεκτρονικής διακυβέρνησης. Ειδικότερα, η εργασία θα αναπτυχθεί σε τέσσερα κεφάλαια ως εξής: Στο πρώτο κεφάλαιο αφού προηγηθεί μία ιστορική αναδρομή του όρου «προσωπικά δεδομένα», θα γίνει αναφορά σε βασικές έννοιες οι οποίες εμπεριέχονται στο γενικό κανονισμό προστασίας δεδομένων (ΓΚΠΔ). Στο δεύτερο κεφάλαιο θα γίνει ανάλυση των υπηρεσιών ηλεκτρονικής διακυβέρνησης, τόσο ως προς το ευρωπαϊκό πλαίσιο διαλειτουργικότητας όσο και σε επίπεδο ολοκλήρωσης των εν λόγω υπηρεσιών στην εθνική έννομη τάξη. Στο τρίτο κεφάλαιο θα αναπτυχθεί η έννοια των προσωπικών δεδομένων των φορολογικών υποκειμένων, σύμφωνα με τον νέο ΓΚΠΔ της Ε.Ε (2016/ 679 & Οδηγία Ε.Ε 2016/ 680) όπως αυτός προσαρμόστηκε στην ελληνική έννομη τάξη (Ν.2472/ 1997, όπως τροποποιήθηκε με το Ν. 4624/ 2019). Στο τέταρτο κεφάλαιο θα γίνει αναφορά στις γνωμοδοτήσεις της αρχής προστασίας προσωπικών δεδομένων σε θέματα ΓΚΠΔ- GDPR
description: Diploma thesis deals with the management of taxpayers' personal data as collected by the administration through the platforms of their respective e-Government services. In particular, the work will be developed in four chapters as follows: In the first chapter, following an historical overview of the term "personal data", the basic concepts contained in the General Data Protection Regulation (GDPR) will be addressed. The second chapter will analyze e-Government services, both on the european interoperability framework and on the level of integration of these services into the national legal order. In the third chapter we will develop the concept of personal Data of taxpayers, according to the new EU CPC (2016/679 & EU Directive 2016/680) as adapted to the greek legal order (L.2472 / 1997, as amended by Law 4624/2019). The fourth chapter refers to the greek authority for the protection of personal data in matters of G.D.P.R.
Measurements of the Higgs boson production and decay rates and constraints on its couplings from a combined ATLAS and CMS analysis of the LHC $pp$ collision data at $\sqrt{s}=$ 7 and 8 TeV
Creators: name: ATLAS
name: Collaborations, CMS
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Combined ATLAS and CMS measurements of the Higgs boson production and decay rates, as well as constraints on its couplings to vector bosons and fermions, are presented. The combination is based on the analysis of five production processes, namely gluon fusion, vector boson fusion, and associated production with a $W$ or a $Z$ boson or a pair of top quarks, and of the six decay modes $H \to ZZ, WW$, $γγ, ττ, bb$, and $μμ$. All results are reported assuming a value of 125.09 GeV for the Higgs boson mass, the result of the combined measurement by the ATLAS and CMS experiments. The analysis uses the CERN LHC proton--proton collision data recorded by the ATLAS and CMS experiments in 2011 and 2012, corresponding to integrated luminosities per experiment of approximately 5 fb$^{-1}$ at $\sqrt{s}=7$ TeV and 20 fb$^{-1}$ at $\sqrt{s} = 8$ TeV. The Higgs boson production and decay rates measured by the two experiments are combined within the context of three generic parameterisations: two based on cross sections and branching fractions, and one on ratios of coupling modifiers. Several interpretations of the measurements with more model-dependent parameterisations are also given. The combined signal yield relative to the Standard Model prediction is measured to be 1.09 $\pm$ 0.11. The combined measurements lead to observed significances for the vector boson fusion production process and for the $H \to ττ$ decay of $5.4$ and $5.5$ standard deviations, respectively. The data are consistent with the Standard Model predictions for all parameterisations considered.
description: 70 pages plus author lists + cover page (104 pages total), 32 figures, 22 tables, submitted to JHEP. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HIGG-2015-07/ and at http://cms-results.web.cern.ch/cms-results/public-results/publications/HIG-15-002/
ATLASGAL: 3-mm class I methanol masers in high-mass star formation regions
Creators: name: Yang, W.
name: Gong, Y.
name: Menten, K. M.
name: Urquhart, J. S.
name: Henkel, C.
name: Wyrowski, F.
name: Csengeri, T.
name: Ellingsen, S. P.
name: Bemis, A. R.
name: Jang, J.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We analyzed the 3-mm wavelength spectral line survey of 408 ATLASGAL clumps observed with the IRAM 30m-telescope, focusing on the class I methanol masers with frequencies near 84, 95 and 104.3 GHz. We detect narrow, maser-like features towards 54, 100 and 4 sources in the maser lines near 84, 95 and 104.3 GHz, respectively. Among them, fifty 84 GHz masers, twenty nine 95 GHz masers and four rare 104.3 GHz masers are new discoveries. The new detections increase the number of known 104.3 GHz masers from 5 to 9. The 95 GHz class I methanol maser is generally stronger than the 84 GHz maser counterpart. We find 9 sources showing class I methanol masers but no SiO emission, indicating that class I methanol masers might be the only signpost of protostellar outflow activity in extremely embedded objects at the earliest evolutionary stage. Class I methanol masers that are associated with sources that show SiO line wings are more numerous and stronger than those without such wings. The total integrated intensity of class I methanol masers is well correlated with the integrated intensity and velocity coverage of the SiO (2--1) emission. The properties of class I methanol masers are positively correlated with the bolometric luminosity, clump mass, peak H$_2$ column density of their associated clumps but uncorrelated with the luminosity-to-mass ratio, dust temperature, and mean H$_2$ volume density. We suggest that the properties of class I masers are related to shocks traced by SiO. Based on our observations, we conclude that class I methanol masers at 84 and 95 GHz can trace a similar evolutionary stage as H$_2$O maser, and appear prior to 6.7 and 12.2 GHz methanol and OH masers. Despite their small number, the 104.3 GHz class I masers appear to trace a short and more evolved stage compared to the other class I masers. [abridged]
description: 23 pages, 27 figures, 8 tables, accepted for publication in A&A
Sexual Violence and its Consequence among Female Night School Students In Hawassa town, Southern Ethiopia: A cross-sectional study
Creators: name: Asfaw, Medhanit
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2010

description: Background: Several school based studies indicated that female students are vulnerable to sexual violence in Ethiopia. In some parts of the country, sexual violence among female students reached up to 21.2%. However, there is still a knowledge gap about the magnitude of sexual violence among female night school students in Ethiopia. Objective: The aim of this study was to assess level of sexual violence and its consequence among night time school students in Hawassa town. Methodology: A cross-sectional study was conducted to assess the prevalence of sexual violence among female night school students in Hawassa town involving 520 randomly selected students from 11 junior primary school and three high schools from December 2010 to Feb 2011. Results: The finding of this study indicated that 14% of the students were raped at list once in their life time while 26.6% faced an attempted rape. Most of the students 83% reported to have faced sexual harassment in their lifetime. The odd of experiencing lifetime rape were higher among female students who drink alcohol, had more than two sexual partners and who were raised in rural areas. Among the victims of completed lifetime rape, n= 24(33.3%) had experienced unwanted pregnancy, n=25 (34.7%) reported injury around the genitalia, n=8 (11.1%) had reported unusual vaginal discharge, n=1(1.4%) experienced swelling around the genitalia and n=12 (16.7%) had abortion. psychological outcomes like unhappiness, suicidal ideation and suicidal attempt were reported by 45.8%, 8.3% and 11.1% of the rape victims; respectively. Conclusion: Female night school students are highly vulnerable to unwanted pregnancy, sexually transmitted infections including HIV due to sexual violence. The problem is high among female students which are extending beyond self harm to other parts of the public. Appropriate intervention shall be in place by participating every concerned party including parents, teachers and other community members to halt the practice especially among night school female students.
Thermodynamic properties of fluids
Creators: name: Khosla., Mohinder Partap
Publisher: name: Monash University
Year: 2021

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
Updated Orbital Ephemeris and Detection of Superhump Modulation in X-ray Band for the Ultra-Compact Low Mass X-ray Binary 4U 1820-30
Creators: name: Chou, Yi
name: Jhang, Yao-Wun
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The 4U 1820-30 is a ultra-compact low mass X-ray binary (LMXB) near the center of the globular cluster NGC 6624. Its negative orbital period derivative, observed from the phase evolution of its sinusoidal-like orbital variation, contradicts the positive value obtained from the theoretical prediction. In this paper, we present the analysis of the 4U 1820-30 orbital modulation from light curves obtained from the {\it Neutron star Interior Composition ExploreR (NICER)} observations from 2017 to mid 2022. Combined with historical records, the orbital derivative is measured from the orbital phase evolution between 1976 and 2002 is $\dot P /P =(-5.21 \pm 0.13) \times 10^{-8}$ yr$^{-1}$. No significant second order orbital period derivative is detected with a 2$σ$ upper limit of $|\ddot P|<5.48 \times 10^{-22}$ s s$^{-2}$. We discuss the possible intrinsic orbital period derivative of 4U 1820-30 and suggest that this binary system may have a significant mass outflow similar to some other LMXBs. In addition, a periodic modulation with a period of $691.6 \pm 0.7$ s, which is consistent with the superhump period discovered in the far ultraviolet band of the {\it Hubble Space Telescope}, was also detected in in the X-ray light curves collected by {\it NICER}. We conclude that such modulation is probably caused by a period of $0.8 \pm 0.1$ day apsidal precession of accretion disk similar to the SU UMa type dwarf novae and some LMXBs. However we cannot exclude the possibility that it is induced by a hierarchical third star orbiting around the binary system.
description: 27 pages, 10 figures, accepted for publication by Astrophysical Journal
Digital Communication and Tourism Engagement: A Gamification Approach
Creators: name: Βιλαδέρη, Πετρούλα Φωτίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2022
Subjects: subject: Βιωσιμότητα
subject: Πράσινες πρακτικές
subject: Φιλοξενία
subject: Μικρά και μεσαία ξενοδοχεία
subject: Τουρισμός
subject: Πρωτότυπο υψηλής πιστότητας
subject: Ψηφιοποίηση
subject: Sustainability
subject: Green Practices
subject: Hospitality
subject: Small and Medium Hotels
subject: Tourism
subject: FOS: Economics and business
subject: High-Fidelity Prototype
subject: Digitization

description: This dissertation was written as part of the master’s degree program in Digital Media, Communication, and Journalism requirements. Considering that sustainability communication growth appears unquestionable in the contemporary tourism agenda, it seems imperative for the hospitality sector to turn greener, especially as we enter the post-COVID 19 era. Digitization has come into prominence of everyday life and an abundance of multimedia tools and digital interactions are leveraged to improve different business sections. The scope of this dissertation is to deliver educational material and data regarding sustainable techniques and practices with digitization tactics and its administrative implementation on Greek Hospitality Sector, with a special emphasis on small and medium enterprises. Its aim is to shed light on the advantages of the sustainability communication from the perspective of the operators through the presentation and a design of a prototype application, which aims at enhancing the engagement rate of touristic enterprises through a gamified procedure.
description: Η παρούσα διατριβή εκπονήθηκε στο πλαίσιο των απαιτήσεων του μεταπτυχιακού προγράμματος σπουδών στα Ψηφιακά Μέσα, την Επικοινωνία και τη Δημοσιογραφία. Λαμβάνοντας υπόψη ότι η ανάπτυξη της επικοινωνίας της βιωσιμότητας εμφανίζεται αδιαμφισβήτητη στη σύγχρονη τουριστική ατζέντα, φαίνεται επιτακτική η ανάγκη για τον τομέα της φιλοξενίας να γίνει πιο πράσινος, ιδίως καθώς εισερχόμαστε στην εποχή μετά τον COVID-19. Η ψηφιοποίηση έχει έρθει στο προσκήνιο της καθημερινής ζωής και μια πληθώρα εργαλείων πολυμέσων και ψηφιακών αλληλεπιδράσεων αξιοποιούνται για τη βελτίωση διαφόρων επιχειρηματικών τομέων. Το αντικείμενο της παρούσας διατριβής είναι να παραδώσει εκπαιδευτικό υλικό και δεδομένα σχετικά με βιώσιμες τεχνικές και πρακτικές με τακτικές ψηφιοποίησης και τη διοικητική εφαρμογή τους στον ελληνικό ξενοδοχειακό τομέα, με ιδιαίτερη έμφαση στις μικρομεσαίες επιχειρήσεις. Στόχος της είναι να φωτίσει τα πλεονεκτήματα της αειφόρου επικοινωνίας από την πλευρά των φορέων μέσα από την παρουσίαση και το σχεδιασμό μιας πρωτότυπης εφαρμογής, η οποία στοχεύει στην ενίσχυση του ποσοστού δέσμευσης των τουριστικών επιχειρήσεων μέσω μιας διαδικασίας παιχνιδοποίησης.
The data on the boundary at order $α'$
Creators: name: Garousi, Mohammad R.
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The least action principle indicates that for the open spacetime manifolds, there are data on the boundary. Recently, it has been proposed that the data for the effective actions at order $α'$ are the values of the massless fields and their first derivatives. These data should be respected by the T-duality transformations at order $α'$. Moreover, the T-duality transformations should not change the unit vector to the boundary which in turns implies that the base space metric should be also invariant. Assuming such restricted T-duality transformations, we show that the transformation of the circular reduction of the parity-odd part of the effective action of the heterotic string theory at order $α'$ under the Buscher rules is cancelled by some total derivative terms and by some restricted T-duality transformations at order $α'$. Using the Stokes' theorem, we then show that the boundary terms in the base space corresponding to the total derivative terms are $exactly$ cancelled by transformation of the circular reduction of the Gibbons-Hawking boundary term under the above restricted T-duality transformations. These calculations confirm the above proposal for the data on the boundary for the effective actions at order $α'$.
description: 12 pages, Latex file, no figure; v2: typos corrected, it appears in EPJC
Non-thermal emissions from a head-tail radio galaxy in 3D magnetohydrodynamic simulations
Creators: name: Ohmura, Takumi
name: Asano, Katsuaki
name: Nishiwaki, Kosuke
name: Machida, Mami
name: Sakemi, Haruka
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present magnetohydrodynamic simulations of a jet-wind interaction in a galaxy cluster and the radio to gamma-ray and the neutrino emissions from this "head-tail galaxy". Our simulation follows the evolution of cosmic-ray (CR) particle spectra with energy losses and the stochastic turbulence acceleration. We find that the reacceleration is essential to explain the observed radio properties of head-tail galaxies, in which the radio flux and spectral index do not drastically change. Our models suggest that hard X-ray emissions can be detected around the head-tail galaxy in the Perseus cluster by the hard X-ray satellites, such as FORCE, and it will potentially constrain the acceleration efficiency. We also explore the origin of the collimated synchrotron threads, which are found in some head-tail galaxies by recent high-quality radio observations. Thin and elongated flux tubes, connecting the two tails, are formed by strong backflows at an early phase. We find that these threads advect with the wind for over 300 Myr without disrupting. The radio flux from the flux tubes is much lower than the typical observed flux. An efficient CR diffusion process along the flux tubes, however, may solve this discrepancy.
description: 16 pages, 10 figures, accepted for publication in ApJ
Landau Levels in 2D materials using Wannier Hamiltonians obtained by first principles
Creators: name: Lado, J. L.
name: Fernandez-Rossier, J.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We present a method to calculate the Landau levels and the corresponding edge states of two dimensional (2D) crystals using as a starting point their electronic structure as obtained from standard density functional theory (DFT). The DFT Hamiltonian is represented in the basis of maximally localized Wannier functions. This defines a tight-binding Hamiltonian for the bulk that can be used to describe other structures, such as ribbons, provided that atomic scale details of the edges are ignored. The effect of the orbital magnetic field is described using the Peierls substitution in the hopping matrix elements. Implementing this approach in a ribbon geometry, we obtain both the Landau levels and the dispersive edge states for a series of 2D crystals, including graphene, Boron Nitride, MoS$_2$ , Black Phosphorous, Indium Selenide and MoO$_3$ . Our procedure can readily be used in any other 2D crystal, and provides an alternative to effective mass descriptions.
description: 11 pages, 8 figures