cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Improved delivery of Porphyrin derivatives to identified targets
Creators: name: Jiang, Frank Ningjun
Publisher: name: University of British Columbia
Year: 2008

description: The thesis is in three parts. Initially, work centred on the development of conjugation technology for covalently binding the photosensitizer (PS) benzoporphyrin derivative monoacid ring A (BPD) to monoclonal antibodies (MoAbs) using a water soluble carrier molecule, modified poiyvinyi alcohol (M-PVA). This conjugation procedure has been shown to be reliable and reproducible and result in negligible loss of biological activity of both MoAb and PS. The second part of the thesis was focused on determining the specificity and selectivity of the MoAb-PS conjugate in an In vitro system. The 5E8 MoAb, specific for human squamous cell lung cancer (A549), was used in this study. Extensive studies in which the 5E8-M-PVA-BPD conjugate was tested and compared with an irrelevant control conjugate - T48-M-PVA-BPD under a variety of experimental conditions established that the 5E8 conjugate had specificity in terms of binding to A549 cells, and had significantly (p <0.01) greater efficacy in photodynamic killing in cytotoxicity assays. Further experiments were carried out to determine whether internalization of the BPD enhanced photodynamic killing. The results showed that internalized conjugate had much higher cytotoxicity than did surface associated. This was shown using two different model systems - 5E8 and the C7 antibody which has specificity for human low density lipoprotein (LDL) receptors. The final part of the thesis was involved in determining the fate of MoAb-PS conjugates in yyQ. Studies were carried out in A549 tumor bearing nude mice comparing the biodistribution of 5E8-M-PVA-BPD and T48-M-PVA-BPD. Both conjugates had biodistribution characteristics which distinguished them from free BPD in that they remained in the circulation and most tissues for significantly (p <0.01) longer times than did free BPD. With the exception of the 5E8-M-PVA-BPD conjugate and A549 tumor tissue, levels in all tissues were highest at the 3 h time point following injection of conjugates. In the case of the A549 tumor and the 5E8-M-PVA-BPD conjugate, the highest concentration of BPD was observed between 14 and 24 h following injection. Since the conjugates tested behaved differently from free BPD it was presumed that the material did not dissociate in and that the specific conjugate demonstrated specificity for the A549 tumor in terms of the kinetics of its accumulation in tumor tissue.
Did Mars possess a dense atmosphere during the first ~400 million years?
Creators: name: Scherf, M.
name: Lammer, H.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: FOS: Physical sciences

description: It is not yet entirely clear whether Mars began as a warm and wet planet that evolved towards the present-day cold and dry body or if it always was cold and dry with just some sporadic episodes of liquid water on its surface. An important clue into this question can be gained by studying the earliest evolution of the Martian atmosphere and whether it was dense and stable to maintain a warm and wet climate or tenuous and susceptible to strong atmospheric escape. We discuss relevant aspects for the evolution and stability of a potential early Martian atmosphere. This contains the solar EUV flux evolution, the formation timescale and volatile inventory of the planet including volcanic degassing, impact delivery and removal, the loss of a catastrophically outgassed steam atmosphere, atmosphere-surface interactions, and thermal and non-thermal escape processes affecting any secondary atmosphere. While early non-thermal escape at Mars before 4 billion years ago (Ga) is poorly understood, particularly in view of its ancient intrinsic magnetic field, research on thermal escape processes indicate that volatile delivery and volcanic degassing cannot counterbalance the strong thermal escape. Therefore, a catastrophically outgassed steam atmosphere of several bars of CO2 and H2O, or CO and H2 for reduced conditions, could have been lost within just a few million years (Myr). Thereafter, Mars likely could not build up a dense secondary atmosphere during its first ~400 Myr but might only have possessed an atmosphere sporadically during events of strong volcanic degassing, potentially also including SO2. This indicates that before ~4.1 Ga Mars indeed might have been cold and dry. A denser CO2- or CO-dominated atmosphere, however, might have built up afterwards but must have been lost later-on due to non-thermal escape processes and sequestration into the ground.
description: 120 pages, 12 figures. This is a preprint of an article published in Space Science Reviews. The final authenticated version can be found online at https://doi.org/10.1007/s11214-020-00779-3
An effective and friendly tool for seed image analysis
Creators: name: Loddo, Andrea
name: Di Ruberto, Cecilia
name: Vale, A. M. P. G.
name: Ucchesu, Mariano
name: Soares, J. M.
name: Bacchetta, Gianluigi
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Image analysis is an essential field for several topics in the life sciences, such as biology or botany. In particular, the analysis of seeds (e.g. fossil research) can provide significant information on their evolution, the history of agriculture, plant domestication and knowledge of diets in ancient times. This work aims to present software that performs image analysis for feature extraction and classification from images containing seeds through a novel and unique framework. In detail, we propose two plugins \emph{ImageJ}, one able to extract morphological, textual and colour features from seed images, and another to classify seeds into categories using the extracted features. The experimental results demonstrated the correctness and validity of both the extracted features and the classification predictions. The proposed tool is easily extendable to other fields of image analysis.
Σύγχρονες μέθοδοι εκπαιδευτικής παρέμβασης σε παιδιά με επιλεκτική αλαλία
Creators: name: Μελετιάδου, Ευανθία Συμέων
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: επιλεκιτκή αλαλία
παρέμβαση
εκπαιδευτικές μέθοδοι
selective mutism
intervention
educational methods

description: Η επιλεκτική αλαλία είναι μία σπάνια παιδική διαταραχή που αποτελεί υποκατηγορία των αγχωδών διαταραχών. Τα παιδιά με επιλεκτική αλαλία είναι ικανά να ασκήσουν τη δεξιότητα της ομιλίας αλλά δεν ομιλούν σε συγκεκριμένες κοινωνικές συνθήκες επιλεκτικά. Τις περισσότερες φορές η απουσία ομιλίας δημιουργεί ελλείμματα στη γλωσσική, συναισθηματική και κοινωνική ολοκλήρωση του παιδιού καθώς και στη σύναψη φιλικών σχέσεων. Λόγω των δυσκολιών που αντιμετωπίζουν τα παιδιά με επιλεκτική αλαλία και λόγω της σιωπηλής συμπεριφοράς τους επηρεάζεται άμεσα το οικογενειακό και σχολικό τους περιβάλλον. Όπως η παγκόσμια βιβλιογραφία, έτσι και η συγκεκριμένη εργασία ευελπιστεί να αναδείξει τις σωστές πρακτικές αντιμετώπισης της διαταραχής, ώστε να βοηθηθεί η εκπαιδευτική διαδικασία στη σχολική τάξη μέσω καινοτόμων και σύγχρονων μεθόδων μάθησης
description: Selective mutism is a rare childhood disorder which appertains to anxiety disorders. Children with SM are capable of speaking but selectively don't use the ability to speak in specific social conditions. Most of the time the absence of speech increases language, emotional and social deficits or prevents the child from creating new interpersonal relationships. On account of the deficits that occur in SM, the family and school system are also affected. The current study tries to emphasize the right strategies to face selective mutism in the school class through innovative and modern learning methods
Variational quantum algorithm with information sharing
Creators: name: Self, Chris N.
name: Khosla, Kiran E.
name: Smith, Alistair W. R.
name: Sauvage, Frederic
name: Haynes, Peter D.
name: Knolle, Johannes
name: Mintert, Florian
name: Kim, M. S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We introduce an optimisation method for variational quantum algorithms and experimentally demonstrate a 100-fold improvement in efficiency compared to naive implementations. The effectiveness of our approach is shown by obtaining multi-dimensional energy surfaces for small molecules and a spin model. Our method solves related variational problems in parallel by exploiting the global nature of Bayesian optimisation and sharing information between different optimisers. Parallelisation makes our method ideally suited to next generation of variational problems with many physical degrees of freedom. This addresses a key challenge in scaling-up quantum algorithms towards demonstrating quantum advantage for problems of real-world interest.
description: 10 pages, 6 figures, use of IBM Quantum devices
A. Beayaert-Geslin - M.G. Dondero, Art et sciences. Approches sémiotiques et philosophiques des images
Creators: name: Schirò, Enrico
Publisher: name: Lebenswelt. Aesthetics and philosophy of experience.
Year: 2015

description: _
description: Lebenswelt. Aesthetics and philosophy of experience., No 6 (2015)
Field-induced level crossings in spin clusters: Thermodynamics and magneto-elastic instability
Creators: name: Waldmann, O.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Quantum spin clusters with dominant antiferromagnetic Heisenberg exchange interactions typically exhibit a sequence of field-induced level crossings in the ground state as function of magnetic field. For fields near a level crossing, the cluster can be approximated by a two-level Hamiltonian at low temperatures. Perturbations, such as magnetic anisotropy or spin-phonon coupling, sensitively affect the behavior at the level-crossing points. The general two-level Hamiltonian of the spin system is derived in first-order perturbation theory, and the thermodynamic functions magnetization, magnetic torque, and magnetic specific heat are calculated. Then a magneto-elastic coupling is introduced and the effective two-level Hamilitonian for the spin-lattice system derived in the adiabatic approximation of the phonons. At the level crossings the system becomes unconditionally unstable against lattice distortions due to the effects of magnetic anisotropy. The resultant magneto-elastic instabilities at the level crossings are discussed, as well as the magnetic behavior.
description: 13 pages, 8 figures, REVTEX4
Crystallization of Bosonic Quantum Hall States
Creators: name: Mukherjee, Biswaroop
name: Shaffer, Airlia
name: Patel, Parth B.
name: Yan, Zhenjie
name: Wilson, Cedric C.
name: Crépel, Valentin
name: Fletcher, Richard J.
name: Zwierlein, Martin
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Pattern Formation and Solitons (nlin.PS)
subject: Fluid Dynamics (physics.flu-dyn)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The dominance of interactions over kinetic energy lies at the heart of strongly correlated quantum matter, from fractional quantum Hall liquids, to atoms in optical lattices and twisted bilayer graphene. Crystalline phases often compete with correlated quantum liquids, and transitions between them occur when the energy cost of forming a density wave approaches zero. A prime example occurs for electrons in high magnetic fields, where the instability of quantum Hall liquids towards a Wigner crystal is heralded by a roton-like softening of density modulations at the magnetic length. Remarkably, interacting bosons in a gauge field are also expected to form analogous liquid and crystalline states. However, combining interactions with strong synthetic magnetic fields has been a challenge for experiments on bosonic quantum gases. Here, we study the purely interaction-driven dynamics of a Landau gauge Bose-Einstein condensate in and near the lowest Landau level (LLL). We observe a spontaneous crystallization driven by condensation of magneto-rotons, excitations visible as density modulations at the magnetic length. Increasing the cloud density smoothly connects this behaviour to a quantum version of the Kelvin-Helmholtz hydrodynamic instability, driven by the sheared internal flow profile of the rapidly rotating condensate. At long times the condensate self-organizes into a persistent array of droplets, separated by vortex streets, which are stabilized by a balance of interactions and effective magnetic forces.
Adopting computers in architectural firms
Creators: name: Kiamanesh, Mitra
Publisher: name: University of British Columbia
Year: 2008

description: This research has explored the status of computerization in architectural firms and the problems they face in adopting and using computers. The research methodology included both, a literature search and case studies consisting of interviews and questionnaires. To gain an in-depth understanding of the status of computer use and its related problems, and to benefit from the experience of current computer owner/users, eleven Vancouver firms which currently use computers in their practice, are interviewed. The initial decision to computerize is often based on a group of perceptions from the benefits of computer use for the practice. This decision is usually rationalized by the need to remain competitive in the market, to increase the productivity or to respond to client's/project's requirements. The extent of planning for the process of computerization usually depends on the size of the practice and scope of computerization. Planning however, is typically short term and problems and needs are addressed as and when they occur. Most architects select their hardware first and then their application software. The typical approach at this stage is to rely mainly on in-house resources and to select the system mainly according to price. The issues related to implementation and use of the system are usually addressed stage by stage. In attempting successful implementation and computer use, the impact of management style and staffs attitudes appear to be significant. In most firms there is not any methods of evaluation to identify and modify the problems and therefore increase the effectiveness of computer use in the practice. System expansion is in general due to satisfactory experience, or an initial under estimate of station requirements. This stage is often based on a more realistic understanding of both, the firm's requirements and the computers capabilities. The most important observation is that the validity of the advantages of computerization are not examined at the initial stages nor are methods of increasing and achieving them. In addition, revenue increase through the expansion of services is seldom considered. Following the research, a series of guidelines are developed for practising architects, suggesting that advance planning can reduce most problems or their impacts. These guidelines present some important factors to be considered in the process of computerization were developed. They are structured according to the stages of computerization.
On the Fine Structure of the Projective Line Over GF(2) x GF(2) x GF(2)
Creators: name: Saniga, Metod
name: Planat, Michel
Publisher: name: arXiv
Year: 2006
Subjects: subject: Algebraic Geometry (math.AG)
subject: Quantum Physics (quant-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: The paper gives a succinct appraisal of the properties of the projective line defined over the direct product ring $R\_{\triangle} \equiv$ GF(2)$\otimesGF(2)\otimes$GF(2). The ring is remarkable in that except for unity, all the remaining seven elements are zero-divisors, the non-trivial ones forming two distinct sets of three; elementary ('slim') and composite ('fat'). Due to this fact, the line in question is endowed with a very intricate structure. It contains twenty-seven points, every point has eighteen neighbour points, the neighbourhoods of two distant points share twelve points and those of three pairwise distant points have six points in common -- namely those with coordinates having both the entries `fat' zero-divisors. Algebraically, the points of the line can be partitioned into three groups: a) the group comprising three distinguished points of the ordinary projective line of order two (the 'nucleus'), b) the group composed of twelve points whose coordinates feature both the unit(y) and a zero-divisor (the 'inner shell') and c) the group of twelve points whose coordinates have both the entries zero-divisors (the 'outer shell'). The points of the last two groups can further be split into two subgroups of six points each; while in the former case there is a perfect symmetry between the two subsets, in the latter case the subgroups have a different footing, reflecting the existence of the two kinds of a zero-divisor. The structure of the two shells, the way how they are interconnected and their link with the nucleus are all fully revealed and illustrated in terms of the neighbour/distant relation. Possible applications of this finite ring geometry are also mentioned.
description: 8 pages, 2 figures
Driven quantum many-body systems and out-of-equilibrium topology
Creators: name: Bandyopadhyay, Souvik
name: Bhattacharjee, Sourav
name: Sen, Diptiman
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: In this review we present some of the work done in India in the area of driven and out-of-equilibrium systems with topological phases. After presenting some well-known examples of topological systems in one and two dimensions, we discuss the effects of periodic driving in some of them. We discuss the unitary as well as the non-unitary dynamical preparation of topologically non-trivial states in one and two dimensional systems. We then discuss the effects of Majorana end modes on transport through a Kitaev chain and a junction of three Kitaev chains. Transport through the surface states of a three-dimensional topological insulator is discussed. The effects of hybridization between the top and bottom surfaces and the application of electromagnetic radiation on a strip-like region on the top surface are described. Two unusual topological systems are mentioned briefly, namely, a spin system on a kagome lattice and a Josephson junction of three superconducting wires. We have also included a pedagogical discussion on topology and topological invariants in the appendices, where the connection between topological properties and the intrinsic geometry of quantum states is also elucidated.
description: 54 pages, 26 figures; made a number of small changes; published in a special issue on Quantum Dynamics Research in India
Δυσλεξία και Εγκέφαλος
Creators: name: Παπαγιαννίδου, Ελένη Ιωάννη
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: Δυσλεξία
Εγκέφαλος
Παρέμβαση
Dyslexia
Brain
Intervention

description: Η παρούσα εργασία έχει ως αντικείμενο μελέτης, τη συνοπτική αναφορά των αιτιών των ελλειμμάτων στη δυσλεξία και τον τρόπο που αυτά διαγιγνώσκονται και προσεγγίζονται μέσω απεικονιστικών μεθόδων. Αρχικά, θα γίνει αναφορά στον ορισμό της δυσλεξίας καθώς και στα αίτια του προβλήματος που παρουσιάζεται σε ολοένα και περισσότερα παιδιά. Επιπλέον, γίνεται αναφορά στους τύπους της δυσλεξίας αναλύοντας λεπτομερώς την κάθε περίπτωση. Είναι κοινώς γνωστό ότι δεν υπάρχει επαρκής ενημέρωση για την προσφορά των νευροαπεικονιστικών μεθόδων στη διάγνωση των μαθησιακών και αναπτυξιακών διαταραχών. Με τη χρήση τους μπορούμε να έχουμε πιο έγκαιρη και ασφαλή διάγνωση των αντίστοιχων διαταραχών, ωστόσο ο τομέας αυτός ολοένα και αναπτύσσεται. Αυτά τα ευρήματα της νευροαπεικόνισης ενθαρρύνουν την έγκαιρη ταυτοποίηση των ατόμων που κινδυνεύουν από αναπτυξιακή δυσλεξία, γεγονός που θα μπορούσε να οδηγήσει σε πρώιμες παρεμβάσεις που είναι πιο αποτελεσματικές από τις παρεμβάσεις που χορηγούνται αργότερα
description: The present study aims to summarize the causes of deficits in dyslexia and the way they are diagnosed and approached through imaging methods. Initially, reference will be made to the definition of dyslexia as well as to the causes of the problem presented to more and more children. In addition, reference is made to the types of dyslexia by analyzing in detail each case. It is commonly known that there is insufficient information about neuroimaging methods in the diagnosis of learning and developmental disorders, and we can have a more timely and safe diagnosis of the disorder, but this area is growing. These findings of neuroimaging encourage the timely identification of children at risk of developmental dyslexia, which could lead to early interventions that are more effective than later interventions
An instrumented tracer for Lagrangian measurements in Rayleigh-Bénard convection
Creators: name: Shew, Woodrow L.
name: Gasteuil, Yoann
name: Gibert, Mathieu
name: Metz, Pascal
name: Pinton, Jean-Francois
Publisher: name: arXiv
Year: 2007
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We have developed novel instrumentation for making Lagrangian measurements of temperature in diverse fluid flows. A small neutrally buoyant capsule is equipped with on-board electronics which measure temperature and transmit the data via a wireless radio frequency link to a desktop computer. The device has 80 dB dynamic range, resolving milli-Kelvin changes in temperature with up to 100 ms sampling time. The capabilities of these "smart particles" are demonstrated in turbulent thermal convection in water. We measure temperature variations as the particle is advected by the convective motion, and analyse its statistics. Additional use of cameras allow us to track the particle position and to report here the first direct measurement of Lagrangian heat flux transfer in Rayleigh-B{é}nard convection. The device shows promise for opening new research in a broad variety of fluid systems.
description: 14 pages
How Twitter is used by various European political leaders: A study of four European heads of state – Angela Merkel, Theresa May, Alexis Tsipras & Emmanuel Macron
Creators: name: Ryckmans, Marie-Pierre Joke Esther Daniel
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: Twitter
Social media
Political communication strategies
Comparison
Europe
Political leaders

description: The aim of this paper is to analyse and compare the use four European heads of state make of the social media Twitter. Those politicians are the German Chancellor - Angela Merkel, the British prime minister - Theresa May, the Greek prime minister - Alexis Tsipras, and the French president - Emmanuel Macron. Through the content analysis of their Twitter activity included between the 1st of September 2018 and the 1st of November 2018, it becomes evident that each of those politicians has a specific communication technique when it comes to Twitter. Merkel does not adopt it at all in order to communicate with her citizens or other people. May is rational and constant in her contacts with her followers. In addition, she employs a considerable amount of accompanying media. Tsipras, using his two accounts, reaches different audiences and overlooks the usage of media for a more conservative approach. Macron is using Twitter to bypass the mainstream media acting as a middle man, failing however to settle in a two-way online communication with his followers.
description: Η παρούσα μεταπτυχιακή διατριβή στοχεύει στην ανάλυση και σύγκριση της χρήσης των κοινωνικών δικτύων, συγκεκριμένα του Twitter, τεσσάρων αρχηγών κρατών της Ευρώπης, της Γερμανίδας καγκελαρίου Άνγκελα Μέρκελ, της Βρετανίδας πρωθυπουργού Τερέζα Μέι, του Έλληνα πρωθυπουργού Αλέξη Τσίπρα και του Γάλλου προέδρου Εμανουέλ Μακρόν. Σύμφωνα με την ανάλυση περιεχομένου του προσωπικού λογαριασμού τους στο Twitter κατά τη χρονική περίοδο μεταξύ της 1ης Σεπτεμβρίου 2018 και της 1ης Νοεμβρίου 2018, διαπιστώνεται ότι ο κάθε πολιτικός αρχηγός έχει συγκεκριμένη επικοινωνιακή τεχνική. Η Μέρκελ δεν το υιοθετεί καθόλου στην επικοινωνία της με τους πολίτες ή με τρίτους. Η Μέι είναι σταθερή και επίμονη στις επαφές της με τους ακολούθους της. Επιπλέον, χρησιμοποιεί σε σημαντικό βαθμό παρόμοια μέσα. Ο Τσίπρας, χρησιμοποιώντας και τους δύο λογαριασμούς του, απευθύνεται σε διαφορετικά κοινά αγνοώντας την χρήση των μέσων για μια περισσότερο συντηρητική προσέγγιση. Ο Μακρόν χρησιμοποιεί το Twitter για να παρακάμψει τα παραδοσιακά μέσα ενημέρωσης, λειτουργώντας ως μεσάζων (middleman), αποτυγχάνοντας, ωστόσο, να καταστήσει μια αμφίδρομη επικοινωνία με τους ακολούθους του.
Γραφικά υπολογιστών και η τεχνική του Screen Space Ambient Occlusion
Creators: name: Καπουράνης, Ηλίας Νικολάου
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: Εκπαίδευση
Γραφικά υπολογιστών
Φωτισμός
Education
Computer graphics
Ambient occlusion

description: Καθημερινά χρησιμοποιούμε εφαρμογές σε συστήματα με οθόνες για εκπαίδευση, εργασία και ψυχαγωγία. Ανάλογα με την εφαρμογή αλλάζουν και οι απαιτήσεις των συστημάτων για να μπορέσουν να υποστηρίξουν την εκτέλεση των εφαρμογών. Ελαφριές εφαρμογές, όπως οι επεξεργαστές κειμένων, δε χρειάζονται τους ίδιους υπολογιστικούς πόρους με εφαρμογές που χρησιμοποιούν οι επαγγελματίες σχεδιαστές και μηχανικοί. Αυτές οι εφαρμογές είναι διαφορετικές και στο σκοπό αλλά και στην υλοποίηση τους αλλά έχουν ένα κοινό: παράγουν αποτέλεσμα το οποίο βλέπει ο χρήστης και έτσι χρησιμοποιούν τεχνικές και υλικό γραφικών υπολογιστών. Παρ’ όλη την εκτενή και καθημερινή χρήση αυτών των εφαρμογών, η γνώση των διαδικασιών γραφικών υπολογιστών είναι σχετικά περιορισμένη. Σε αυτή την εργασία θα συζητηθούν οι διαδικασίες των γραφικών υπολογιστών και τα δομικά τους στοιχεία στοχεύοντας στην προσιτή επεξήγηση τους για να εμπνεύσει τον αναγνώστη και να τον προτρέψει να διερευνήσει τα θέματα σε μεγαλύτερο βάθος. Επιπρόσθετα, θα αναλυθεί μία μέθοδος υπολογισμού σκίασης, το Screen Space Ambient Occlusion, για την παρουσίαση ενός παραδείγματος χρήσης και συνδυασμού του υλικού με τους αλγορίθμους στον πραγματικό κόσμο. Παράλληλα με τη συγγραφή της εργασίας αναπτύχθηκε λογισμικό στη γλώσσα προγραμματισμού C++, με τη χρήστη της OpenGL για τα γραφικά, από το οποίο προέκυψαν οι εικόνες με τα αποτελέσματα της τεχνικής φωτισμού που θα αναλυθεί
description: Every day we use applications on systems with screens for education, work and entertainment. Based on the use case, the system requirements change in order to support the execution of each application. Lightweight applications like word editors require much lower processing power than professional applications for designers and engineers. These applications are vastly different in scope and implementation but have one thing in common: they generate results that the user is seeing on a screen and, thus, they use hardware and software for computer graphics. Despite the extensive and daily usage of these applications, the knowledge of the computer graphics processes and techniques is quite limited. In this thesis, we will discuss the processes and procedures for computer graphics generation and present their building blocks. The main focus of the thesis concerns accessible explanations to inspire and urge the reader to investigate the field in greater depth. Additionally, a method of approximating shadows based on global illumination will be presented, the Screen Space Ambient Occlusion, to provide a real-world example of how the utilized hardware can be combined with appropriate algorithms to achieve a specific goal. A C++ program with OpenGL for graphics is also written to complement this thesis and provide the results of the discussed technique
Thresholds for breather solutions on the Discrete Nonlinear Schrödinger Equation with saturable and power nonlinearity
Creators: name: Cuevas, J.
name: Eilbeck, J. C.
name: Karachalios, N. I.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: We consider the question of existence of periodic solutions (called breather solutions or discrete solitons) for the Discrete Nonlinear Schrödinger Equation with saturable and power nonlinearity. Theoretical and numerical results are proved concerning the existence and nonexistence of periodic solutions by a variational approach and a fixed point argument. In the variational approach we are restricted to DNLS lattices with Dirichlet boundary conditions. It is proved that there exists parameters (frequency or nonlinearity parameters) for which the corresponding minimizers satisfy explicit upper and lower bounds on the power. The numerical studies performed indicate that these bounds behave as thresholds for the existence of periodic solutions. The fixed point method considers the case of infinite lattices. Through this method, the existence of a threshold is proved in the case of saturable nonlinearity and an explicit theoretical estimate which is independent on the dimension is given. The numerical studies, testing the efficiency of the bounds derived by both methods, demonstrate that these thresholds are quite sharp estimates of a threshold value on the power needed for the the existence of a breather solution. This it justified by the consideration of limiting cases with respect to the size of the nonlinearity parameters and nonlinearity exponents.
description: 26 pages, 10 figures
title: Development and assessment of systems for population-based estimation of neonatal and perinatal mortality in The Gambia
Creators: name: Rerimoi, AJ
Publisher: name: London School of Hygiene & Tropical Medicine
Year: 2019

description: Background: Accurate data on perinatal and neonatal mortality in sub-Saharan Africa are scarce. This thesis assesses methods for their estimation in The Gambia. Methods: Under-five mortality was estimated, comparing the results of the first Demographic Health Survey in 2013 with previous inquiries. Three studies collecting primary data were conducted to assess and develop systems to improve estimation of perinatal and neonatal mortality. First, a pregnancy history survey that employed female interviewers was conducted and the results were compared with those from routine health and demographic surveillance in Basse. A second study linked records of women visiting antenatal clinics (ANC) to the Health and Demographic Surveillance System (HDSS) and used the augmented data to re-estimate neonatal, infant mortality and stillbirth rates. Third, a qualitative study was embedded in the retrospective survey to explore reasons for under-reporting of neonatal deaths and stillbirths. Findings: The DHS estimates of mortality for the recent past were consistent with those from other surveys. Age-disaggregated estimates for 2010-11 reveal that neonatal mortality constitutes 40% of under-five deaths in The Gambia. Women reported significantly more pregnancies in the pregnancy history survey than the HDSS and, in particular, more adverse pregnancy outcomes. Thus, while collecting data prospectively in HDSS generally limits omissions of deaths and age/date reporting errors, it may yield less complete data than pregnancy histories on adverse perinatal outcomes. However, the ANC-HDSS linkage study improved the capture of pregnancies. Women whose pregnancy was only detected in the clinic were 2.5 times more likely to have had a stillbirth than women whose pregnancies were picked up by the HDSS. The qualitative study showed that the cultural practice of pregnancy concealment, reluctance to speak of the deceased and to be counted affect the accuracy of data on pregnancy outcomes and mortality in The Gambia. It also revealed the importance of identification and use of culturally-appropriate metaphors and idioms to discuss sensitive matters compared to training interviewers to ask standardised verbatim questions.
Η μεταφυσική στην ποίηση του Μίλτου Σαχτούρη: η διττή λειτουργία της έννοιας του ουρανού
Creators: name: Ασαλέα, Σοφία Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: Ουρανός
Σκότος
Υπαρξιακή υπέρβαση
Heaven
Darkness
Existential excess

description: Η παρούσα εργασία με τίτλο Η μεταφυσική στην ποίηση του Μίλτου Σαχτούρη: η διττή λειτουργία της έννοιας του ουρανού πραγματεύεται τον τρόπο με τον οποίο εμφανίζεται ο ουρανός στο σύνολο του ποιητικού έργου του Σαχτούρη σκιαγραφώντας την μεταφυσική προοπτική της ποιητικής του. Το ποιητικό έργο του Σαχτούρη αποτυπώνει την ζοφερή κοινωνική και πολιτική κατάσταση της εμπόλεμης αλλά και της μεταπολεμικής πραγματικότητας, εξυφαίνοντας μέσα από αυτό το υπαρξιακό αδιέξοδο που υφίσταται ο σύγχρονος άνθρωπος. Ο ουρανός εμφανίζεται με διττή υπόσταση, όπως ακριβώς και ο άνθρωπος: ενέχει τόσο τη δυναμική του φωτός, λειτουργώντας ως λυτρωτικό καταφύγιο του ανθρώπου, όσο και τη δυναμική του σκότους, αναλαμβάνοντας και αντανακλώντας την εχθρική και φονική διάθεση της γης. Ο ουρανός δεν λαμβάνει υπερφυσικά χαρακτηριστικά, αλλά αποτελεί μια υπαρξιακή επιλογή, η οποία θα διαμορφώσει τον τρόπο ζωής των ανθρώπων
description: The present work titled Metaphysics in the poetry of Miltos Sachtouris: The dual function of the concept of heaven deals with the way in which heaven appears in the whole of Miltos Sachtouris’ poetry outlining the metaphysical perspective of his poetics. Sachtouris' poetry portrays the bleak social and political situation of war and post-war reality, proving through this the existential stalemate that modern man suffers. Heaven appears with a dual existence, just like man: it involves both the dynamic of light, acting as a redeeming man's refuge, and the dynamic of darkness, taking on and reflecting the hostile and murderous mood of the earth. Heaven does not receive supernatural features, but it is an existential choice that will shape people's way of life
DEVELOPMENT OF THE STORY IN XXI CENTURY IN ENGLISH LITERATURE
Creators: name: Baltaeva, Barnokhon
Publisher: name: Zenodo
Year: 2024

description: In this article we illustrate what is a narrative story, short story and its development and formation in 21 century and give some information about modern storywriters in English literature. Writers use different types of literature styles while they are creating a piece of work by considering the type information they want to express. In contemporary century one of the most widely used version of art is storytelling or narrative stories
Δουλεύοντας σε ξενώνες ασυνόδευτων παιδιών προσφύγων: Προκλήσεις και προσδοκίες των εργαζομένων για την ενίσχυση της τακτικής φοίτησης των παιδιών και την ανάπτυξη και υλοποίηση αποτελεσματικών εκπαιδευτικών προγραμμάτων
Creators: name: Καλομενίδου, Όλγα Θεόδωρου
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: Ασυνόδευτοι ανήλικοι
Εκπαίδευση προσφύγων
Προσωπικό ξενώνων ασυνόδευτων ανηλίκων
Unaccompanied minors
Refugee education
Unaccompanied minors shelters’ staff

description: Η εργασία αυτή ασχολείται με τις εργασιακές συνθήκες στους ξενώνες ασυνόδευτων ανηλίκων προσφύγων και τον τρόπο που αυτές επηρεάζουν τη φοίτησή τους. Πρόκειται για ένα σχετικά νέο επάγγελμα που προέκυψε σε μεγάλη κλίμακα με την προσφυγική κρίση που προέκυψε στην Ελλάδα το 2016. Πριν απ’ αυτό υπήρχαν λίγοι ξενώνες ασυνόδευτων ανηλίκων και το προσωπικό ήταν πολύ περιορισμένο, όπως και το πλήθος των παιδιών. Η ανάγκη για αύξηση των ξενώνων και του προσωπικού οδήγησε σε επείγουσες λύσεις και προσλήψεις και χρειάστηκε αρκετός χρόνος για να αποκτηθεί η αναγκαία εμπειρία για την κατάλληλη φροντίδα των παιδιών. Στο μεταξύ μεσολάβησαν δυο σχολικές χρονιές με πολύ μικρό ποσοστό φοίτησης των παιδιών που διαμένουν στους ξενώνες. Ιδίως την πρώτη χρονιά θα μπορούσαμε να πούμε ότι η φοιτήση ήταν σχεδόν ανύπαρκτη για τα παιδιά αυτά. Επειδή αυτά ακριβώς τα παιδιά ανήκουν σε μια πολύ ευάλωτη ομάδα κι έχουν ιδιαίτερη ανάγκη από τη σχολική φοίτηση προσπαθήσαμε να προσεγγίσουμε έναν από τους παράγοντες που την επηρεάζουν, το προσωπικό των ξενώνων. Επειδή οι άνθρωποι αυτοί αποτελούν μια πολυπληθή ομάδα με δικές τους ανάγκες, ιδιαιτερότητες και προτεραιότητες ο καθένας, θεωρείται αναγκαία η δημιουργία και εφαρμογή κοινού εκπαιδευτικού πλαισίου και διαρκούς υποστήριξης του έργου τους.
description: The present paper is concerned with working conditions of staff in shelters for unaccompanied minors and the effect those conditions have on the refugees’ education. The rather recent profession came to be as a result of the migration crisis in Greece in 2016. Previously, only a few shelters for unaccompanied minors existed and staff as well as subjects were scarce. The sudden need for an increase in shelters and staff lead to urgent solutions and employment. However, it took time for people and structures to be able to appropriately respond to the needs of the children. In the meantime, two school years had passed, with only few of the migrant juveniles being able to attend. In fact, it could be said that in the first year, education for those children was practically non existent. Since the specific group of minors is particularly vulnerable and has a special need for schooling, we tried to approach one of the influencing factors, namely the staff of the shelters. Because the staff is a large and diverse body, with everyone's needs being just as varied and personal priorities different, the creation and application of a consensual educational framework is deemed necessary to support the common task.
A p-Adic Model of DNA Sequence and Genetic Code
Creators: name: Dragovich, Branko
name: Dragovich, Alexandra
Publisher: name: arXiv
Year: 2006
Subjects: subject: Genomics (q-bio.GN)
subject: Information Theory (cs.IT)
subject: Mathematical Physics (math-ph)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Biological sciences
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: Using basic properties of p-adic numbers, we consider a simple new approach to describe main aspects of DNA sequence and genetic code. Central role in our investigation plays an ultrametric p-adic information space which basic elements are nucleotides, codons and genes. We show that a 5-adic model is appropriate for DNA sequence. This 5-adic model, combined with 2-adic distance, is also suitable for genetic code and for a more advanced employment in genomics. We find that genetic code degeneracy is related to the p-adic distance between codons.
description: 13 pages, 2 tables
Non-thermal leptogenesis and UV freeze-in of dark matter: impact of inflationary reheating
Creators: name: Barman, Basabendu
name: Borah, Debasish
name: Roshan, Rishav
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We study a minimal scenario to realize non-thermal leptogenesis and UV freeze-in of a Standard Model (SM) gauge singlet fermionic dark matter (DM) simultaneously, with inflaton field playing a non-trivial role in their yields. The renormalizable interactions are restricted to the SM fields, two right handed neutrinos (RHN) and inflaton coupling exclusively to the RHNs, while the DM couples to both the SM and the RHNs only via operators of dimension $d>4$. Considering two separate cases of $d=\{5,6\}$, we show that for $d=5$, inflaton decay into RHNs followed by their subsequent decay into SM particles lead to both reheating as well as DM production from the SM bath. This requires a cut-off scale as large as $Λ\sim 10^{17}~\rm GeV$ depending on the DM mass. On the other hand, for $d=6$, DM production happens directly from scattering of RHNs (for $Λ\gtrsim 10^{14}~\rm GeV$) that results in a very non-trivial evolution of the DM yield. In both these cases, it is possible to explain the observed baryon asymmetry through successful non-thermal leptogenesis via the decay of the RHNs, together with the PLANCK observed relic density of the DM via pure UV freeze-in mechanism. Taking into account both instantaneous as well as non-instantaneous reheating separately, we constrain the parameter space of this minimal scenario from relevant phenomenological requirements including sub-eV scale active neutrino masses and their mixing.
description: 48 pages, 9 figures, Accepted in PRD
Féministe ou anti-féministe? : images de la femme dans le théâtre de Molière
Creators: name: Mofazali, Mahasti
Publisher: name: University of British Columbia
Year: 2009

description: FÉMINISTE OU ANTI-FÉMINISTE? Images de la femme dans le théâtre de Molière is an extensive study of Molière's feminine and feminist plays in which the playwright depicts seventeenth century French women. Plays studied include The School for Wives, The Female Scholars. Don Juan. The Précieuses Ridicules. The School for Husbands. Tartuffe. Misanthrope, etc. Moreover, the woman's social status in seventeenth century France is illustrated through a vast gallery of female portraits. This study also focuses on character analyses of the female gender as opposed to the male characters seen in his plays. Themes include sexism, wife's servitude towards her husband, woman's liberation, superficiality of certain "salon" women, young girl's education, female identity crisis, love and mariage, forced mariages, cuckoldry, infidelity and "libertinage". A chapter is also dedicated to the maid, "la suivante molièresque", the playwright's ideal feminist. It is especially with Molière's feminist messages which he relays through his plays, that a twentieth century reader can witness the difficult problems that women encountered in the seventeenth century.
Joseph II and Mozart:  A Confluence of Enlightenment Ideals  and Musical Innovation
Creators: name: Ting, Chen
Publisher: name: Zenodo
Year: 2025
Subjects: subject: Musicology
subject: Mozart
subject: Enlightenment
subject: History, 18th Century
subject: Habsburg Empire
subject: Classical Music
subject: Cultural Evolution/history
subject: Cultural History

description: This thesis examines the intersection of Enlightenment ideals and musical innovation  through the relationship between Emperor Joseph II of Austria and composer Wolfgang  Amadeus Mozart. It explores how the political and intellectual climate under Joseph II's reign  shaped Mozart's music, and how Mozart's compositions, in turn, reflected and influenced the  cultural currents of the Enlightenment. The study focuses on key aspects of Mozart's operatic  works, symphonies, and chamber music, examining how these compositions align with the  ideals of reason, freedom, and human dignity promoted by Joseph II.
Extragalactic Zeeman Detections in OH Megamasers
Creators: name: Robishaw, Timothy
name: Quataert, Eliot
name: Heiles, Carl
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have measured the Zeeman splitting of OH megamaser emission at 1667 MHz from five (ultra)luminous infrared galaxies ([U]LIRGs) using the 305 m Arecibo telescope and the 100 m Green Bank Telescope. Five of eight targeted galaxies show significant Zeeman-splitting detections, with 14 individual masing components detected and line-of-sight magnetic field strengths ranging from ~0.5-18 mG. The detected field strengths are similar to those measured in Galactic OH masers, suggesting that the local process of massive star formation occurs under similar conditions in (U)LIRGs and the Galaxy, in spite of the vastly different large-scale environments. Our measured field strengths are also similar to magnetic field strengths in (U)LIRGs inferred from synchrotron observations, implying that milligauss magnetic fields likely pervade most phases of the interstellar medium in (U)LIRGs. These results provide a promising new tool for probing the astrophysics of distant galaxies.
description: 32 pages, 14 figures, 8 tables. Accepted for publication in The Astrophysical Journal v680n2, June 20, 2008; corrected 2 typos
Μικροοργανισμοί που προκαλούν αλλοιώσεις- βιογενείς αμίνες κατά τη συντήρηση του μαριναρισμένου γαύρου
Creators: name: Καρρά, Φωτεινή Κυριάκου
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: Βακτήρια που προκαλούν αλλοιώσεις
Βιογενείς αμίνες
Γαύρος
Spoilage bacteria
Biogenic amines
Anchovy

description: Ο σκοπός της παρούσας έρευνας είναι η διερεύνηση της μικροβιολογικής αλλοίωσης και της παραγωγής βιογενών αμινών στο γαύρο κατά τη διαδικασία παραγωγής και συντήρησης μαριναρισμένου γαύρου. Επίσης εξετάσθηκε η αποτελεσματικότητα στη συντήρηση του προϊόντος της προσθήκης φυσικών αντιμικροβιακών ουσιών και συγκεκριμένα αιθέριου ελαίου σκόρδου και χιτοζάνης σε διάφορους συνδυασμούς. Τέλος έγινε διερεύνηση της επιβίωσης των παθογόνων Listeria monocytogenes και Staphylococcus aureus κατά την παρασκευή του μαριναρισμένου γαύρου.
description: The purpose of this research is to investigate spoilage bacteria and the production of biogenic amines in anchovy during the production and storage of marinated anchovies. Additionally, the effectiveness of maintaining the product of the addition of natural antimicrobial substances, namely garlic essential oil and chitosan in various combinations, has been examined. Finally, was investigated the survival of pathogenic Listeria monocytogenes and Staphylococcus aureus in the preparation of marinated anchovies.
Dynamics of Frenkel excitons in pigment-protein complexes and hybrid systems
Creators: name: Liu, Xiaomeng
Publisher: name: Universität Rostock
Year: 2019
Subjects: subject: 530 Physics

description: A Quantum Master Equation approach is applied to describe the exciton dynamics of the FMO complex, focusing on the effects of vibrations. Further, an excitonic model is applied to the description of the LH2 antenna complex to unravel the origin of the unusual B800 absorption band splitting and to connect this to observed exciton relaxation rates. In the second part a DFTB approach yielding a discrete representation of the electronic quantum mechanical charge density in terms of atom-centered Mulliken charges is used for the description of molecules nearby a metal nanosphere.
First law of thermodynamics and Friedmann-like equations in braneworld cosmology
Creators: name: Ge, Xian-Hui
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We derive the Friedmann-like equations in braneworld cosmology by imposing the first law of thermodynamics and Bekenstein's area-entropy formula on the apparent horizon of a Friedmann-Roberston-Walker universe in both Randall-Sundrum II gravity and Dvali-Gabadadze-Porrati gravity models. Israel's boundary condition plays an important role in our calculations in both cases, besides the first law of thermodynamics and Bekenstein's area-entropy formula. The results indicate that thermodynamics on the brane world knows the behaviors of gravity.
description: 12 pages, no figures,Version 3; minor improvements
HVC and IVC gas in the halo of the Milky Way
Creators: name: Bekhti, Nadya Ben
name: Richter, Philipp
name: Westmeier, Tobias
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We combine CaII/NaI absorption and HI 21 cm emission line measurements to analyse the metal abundances, the distribution, the small-scale structure, and the physical conditions of intermediate- and high-velocity gas in the Galactic halo.
description: 2 pages, 1 figure. To appear in the proceedings of the CRAL-Conference Series I "Chemodynamics: from first stars to local galaxies", Lyon 10-14 July 2006, France, Eds. Emsellem, Wozniak, Massacrier, Gonzalez, Devriendt, Champavert, EAS Publications Series