cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Matrix Designs and Methods for Secure and Efficient Compressed Sensing
Metodi Matriciali per l'Acquisizione Efficiente e la Crittografia di Segnali in Forma Compressa
Creators: name: Cambareri, Valerio <1986>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2015
Subjects: ING-INF/01 Elettronica

description: The idea of balancing the resources spent in the acquisition and encoding of natural signals strictly to their intrinsic information content has interested nearly a decade of research under the name of compressed sensing. In this doctoral dissertation we develop some extensions and improvements upon this technique's foundations, by modifying the random sensing matrices on which the signals of interest are projected to achieve different objectives.

Firstly, we propose two methods for the adaptation of sensing matrix ensembles to the second-order moments of natural signals. These techniques leverage the maximisation of different proxies for the quantity of information acquired by compressed sensing, and are efficiently applied in the encoding of electrocardiographic tracks with minimum-complexity digital hardware.

Secondly, we focus on the possibility of using compressed sensing as a method to provide a partial, yet cryptanalysis-resistant form of encryption; in this context, we show how a random matrix generation strategy with a controlled amount of perturbations can be used to distinguish between multiple user classes with different quality of access to the encrypted information content.

Finally, we explore the application of compressed sensing in the design of a multispectral imager, by implementing an optical scheme that entails a coded aperture array and Fabry-Pérot spectral filters. The signal recoveries obtained by processing real-world measurements show promising results, that leave room for an improvement of the sensing matrix calibration problem in the devised imager.
Narrowing the mass range of Fuzzy Dark Matter with Ultra-faint Dwarfs
Creators: name: Hayashi, Kohei
name: Ferreira, Elisa G. M.
name: Chan, Hei Yin Jowett
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Fuzzy dark matter (FDM) is an attractive dark matter candidate motivated by small scale problems in astrophysics and with a rich phenomenology on those scales. We scrutinize the FDM model, more specifically the mass of the FDM particle, through a dynamical analysis for the Galactic ultra-faint dwarf (UFD) galaxies. We use a sample of 18 UFDs to place the strongest constraints to date on the mass of the FDM particle, updating on previous bounds using a subset of the sample used here. We find that most of the sample UFDs prefer a FDM particle mass heavier than $10^{-21}\mathrm{eV}$. In particular, Segue 1 provides the strongest constraint, with $m_ψ=1.1^{+8.3}_{-0.7}\times10^{-19}\mathrm{eV}$. The constraints found here are the first that are compatible with various other independent cosmological and astrophysical bounds found in the literature, in particular with the latest bounds using the Lyman-$α$ forest. We also find that the constraints obtained in this work are not compatible with the bounds from luminous dwarf galaxies, as already pointed out in the previous work using UFDs. This could indicate that although a viable dark matter model, it might be challenging for the FDM model to solve the small scale problems.
description: 7 pages, 3 figures. Accepted for publication in ApJ Letters
Ξαναδιαβάζοντας το «Για το πνευματικό στην τέχνη» και το «Σημείο, Γραμμή, Επίπεδο» του Wassily Kandinsky» (επιρροές από τα κείμενα της E.P.Blavatsky)
Creators: name: Γκοσιόπουλος, Πέτρος Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Εσωτερική αναγκαιότητα
Θεοσοφία
Αποκρυφισμός
Blavatsky
Steiner
Factura

description: Ο σκοπός του παρόντος πονήματος, είναι η διερεύνηση των φιλοσοφικών επιρροών που δέχθηκε ο Wassily Kandinsky από τη Θεοσοφία, κατά την διαμόρφωση των θεωρητικών-αισθητικών του θέσεων, ώστε να υποστηρίξει την αφαιρετική ζωγραφική, ενώ ταυτόχρονα θεωρείται και ο κύριος εισηγητής της. Πιο συγκεκριμένα, στην επαφή μου με τα θεοσοφικά κείμενα, ιδιαίτερο ενδιαφέρον μού προκάλεσε το γεγονός ότι, κατά το σύνολό τους σχεδόν, οι θεωρητικές απόψεις του Wassily Kandinsky στο «Για το πνευματικό στην τέχνη», εμπεριέχουν αποκρυφιστικές καταβολές από τα εσωτερικά κινήματα της εποχής του και κυρίως τις θεοσοφικές διδασκαλίες της E.P. Blavatsky. Επιπροσθέτως, έλαβα υπόψη μου τις κοινωνικές, πολιτικές και οικονομικές συνθήκες της εποχής κατά την οποία δημιούργησε το έργο του ο Kandinsky, αλλά και τις θέσεις που είχαν για την τέχνη τα διάφορα φιλοσοφικά ρεύματα, οι οποίες, απ’ ό,τι φαίνεται, αποτέλεσαν τα θεμέλια για τις δικές του αισθητικές αντιλήψεις. Η κύρια πηγή της έμπνευσής του ήταν: «Οι σκεπτομορφές» της Annie Besant και του Leadbeater, αλλά και «η Θεοσοφία» του Rudolf Steiner
description: The purpose of this essay is the investigation of the philosophical influences that Wassily Kandinsky received from theosophy, during the moulding of his theoretical-aesthetical positions, which led him to support abstract art, while being considered its major introducer. More specifically, as I came in contact with the theosophical texts, a great interest aroused in me, by the fact that, on the whole, the theoretical views of Wassily Kandinsky in “The Spiritual in Art”, take their origins in the esoteric movements of his time and mainly in the theosophical teachings of E.P. Blavatsky. Additionally, I took into consideration the social, political and economical conditions of the era in which Kandinsky created his works, as well as the positions expressed on art by the different philosophical currents, which, as it seems, were the foundations of his esthetic views. The works that constituted his main source of inspiration were “Thought-forms” by Annie Besant and Leadbeater, as well as “Theosophy” by Rudolf Steiner
Η ανθρωπολογία του Καντ και η πρόσληψή της από τον Φουκώ
Creators: name: Γεωργακούδης, Βασίλης Νικολάου
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: subject: Ανθρωπολογία
subject: Καντ
subject: Φουκώ
subject: Anthropology
subject: FOS: Sociology
subject: Kant
subject: Foucault

description: Στην παρούσα εργασία εξετάζουμε την «Ανθρωπολογία από πραγματολογική άποψη» του Καντ, καθώς και άλλα ελάσσονα ανθρωπολογικά του κείμενα. Η θεματική τους ανάλυση κρίθηκε σκόπιμη προκειμένου να αναδειχθεί το πνεύμα των κειμένων και να καταστεί εφικτή η απάντηση στο ερώτημα αν τελικά ο ανθρωπισμός και ο κοσμοπολιτισμός του Καντ ενέχει σπέρματα εξουσιαστικότητας, τα οποία καρποφόρησαν την εποχή της αποικιοκρατίας. Ταυτόχρονα, εξετάζουμε την πρόσληψη της καντιανής ανθρωπολογίας από τον Μισέλ Φουκώ, προκειμένου να εξακριβωθεί αν αυτή εγγράφεται στην κριτική παράδοση καθώς και αν υπάρχει εκ μέρους του επένδυση της καντιανής ανθρωπολογίας με άλλους νοηματοφόρους ορίζοντες. Η συγκεκριμένη πραγμάτευση αναγκαστικά εμπλέκει το ζήτημα αν θα πρέπει η ανθρωπολογία να περιορίζεται στις a priori συνθήκες της ανθρώπινης γνώσης ή αν θα πρέπει η μεταφυσική να θεμελιώνεται στο ανθρώπινο πεπερασμένο. Θα επιχειρήσουμε, επίσης, να απαντήσουμε στο ερώτημα, αν αποτελεί αντίφαση η θεώρηση του ανθρώπου ως υπερβατολογικής συνθήκης της εμπειρικής γνώσης και ταυτόχρονα ως αντικειμένου αυτής της γνώσης
description: In the following essay we examine Kant’s “Anthropology from a pragmatic point of view”, along with his minor anthropological texts. The analysis of the aforementioned texts was necessary in order to clarify their core idea and answer the question whether Kant’s humanism and cosmopolitanism bares signs of an authoritarianism that can be traced back to the era of colonialism. At the same time, we examine the reception of Kant’s anthropology from Michel Foucault in order to make clear whether Foucault’s enterprise belongs to the critical tradition or it initiates a radical reinterpretation of Kant’s anthropology. My approach cannot but focus on the issue whether anthropology must restrict itself on the a priori conditions of human knowledge or instead metaphysics should be grounded on human finitude. Additionally, we try to address the following question: Does the assumption that human being constitutes the transcendental condition of empirical knowledge contradicts the fact that human being makes at the same time the object of that knowledge
Effects of reduced dimensionality, crystal field, electron-lattice coupling, and strain on the ground-state of a rare-earth nickelates monolayer
Creators: name: Zavaleta, Rodrigo Chavez
name: Fomichev, Stepan
name: Khaliullin, Giniyat
name: Berciu, Mona
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Motivated by the potential for cuprate-like superconductivity in monolayer rare-earth nickelate superlattices, we study the effects of crystal field splitting, lattice distortions and strain on the charge, magnetic, and orbital order in undoped two-dimensional (2D) nickelate monolayers $R$NiO$_3$. We use a two-band Hubbard model to describe the low-energy electron states, with correlations controlled by a effective Hubbard $U$ and Hund's $J$. The electrons are coupled to the octahedral breathing-mode lattice distortions. Treating the lattice semiclassically, we apply the Hartree-Fock approximation to obtain the phase diagram for the ground-state as a function of the various parameters. We find that the 2D confinement leads to strong preference for the planar $d_{x^2-y^2}$ orbital even in the absence of a crystal-field splitting. The $d_{x^2-y^2}$ polarization is enhanced by adding a crystal field splitting, whereas coupling to breathing-mode lattice distortions weakens it. However, the former effect is stronger, leading to $d_{x^2-y^2}$ orbital and antiferromagnetic (AFM) order at reasonable values of $U,J$ and thus to the possibility to realize cuprate-like superconductivity in this 2D material upon doping. We also find that the application of tensile strain enhances the cuprate-like phase and phases with orbital polarization in general, by reducing the $t_2 / t_1$ ratio of next-nearest to nearest neighbour hopping. On the contrary, systems with compressive stress have an increased hopping ratio and consequently show a preference for ferromagnetic (FM) phases, including, unexpectedly, the out-of-plane $d_{3z^2-r^2}$ FM phase.
description: 14 pages, 12 figures
Where there is hope: a qualitative study examining adherence to MDR-TB treatment in Karakalpakstan, Uzbekistan
Creators: name: Horter, Shona
name: Greig, Jane
name: Cros, Philipp Du
name: Dietrich, Sebastian
name: Mirzagaleb Tillyashaykhov
name: Parpieva Nargiza
name: Tigay, Zinaida
name: Dilrabo Ulmasova
name: Stringer, Beverley
Publisher: name: F1000Research
Year: 2015

description: Médecins sans Frontières (MSF) and the Ministry of Health provide a comprehensive tuberculosis (TB) programme in Karakalpakstan, Uzbekistan. Multi-drug resistant TB (MDR-TB) treatment is complex, lengthy and often toxic, and adherence to treatment is challenging. We aimed to provide insight into the different patterns of adherence that exist for patients undergoing MDR-TB treatment in Karakalpakstan, Uzbekistan, exploring the barriers and enablers to treatment-taking in order to inform future strategies of adherence support.Disease knowledge and belief, patient autonomy and control, and views on TB drugs influence adherence to MDR-TB treatment in this context. Patient knowledge and understanding about MDR-TB and treatment should be enhanced and practitioner-patient relationships should move towards more patient-centred models of care, where patients have ownership and responsibility for their treatment-taking.
Perceptions of childhood malnutrition and health seeking behaviour in rural Bihar, India: a qualitative study
Creators: name: Burtscher, Doris
name: Burza, Sakib
Publisher: name: F1000Research
Year: 2015

description: Since 2009, MSF has implemented a community management of acute malnutrition (CMAM) programme in rural Biraul block, Bihar State, India that has admitted over 10000 severely malnourished children but has struggled with poor coverage and default rates.

In order to help identify the underlying causes of poor coverage and default from the CMAM programme, we therefore undertook a qualitative study in Biraul block to understand the community perceptions of undernutritionand the CMAM programme, and how these affected health seeking behaviour.

The objective was to develop evidence that would be used to adapt the CMAM programme in order to improve outcomes and develop a more appropriate health promotion strategy for the community so as to provide more effective care for the target population.The results reaffirm how health education and CMAM programmes should encompass local disease concepts, beliefs and motivations to improve awareness that undernutritionis a disease and one that can be treated. CMAM is well accepted by the community; however, programmes must do better to engage communities, including traditional healers, to enable development of a holistic approach within existing social structures.
Introduction of a routine viral load algorithm in rural Zimbabwe: programmatic strategies for implementation and impact on second line needs
Creators: name: Y  Htung Naing
name: H Bygrave
name: S Simons
name: M  Dhodho
name: C Metcalf
Publisher: name: F1000Research
Year: 2015

description: In 2012, routine viral load (VL) monitoring was implemented among 14,000 patients on antiretroviral therapy (ART) in 26 clinics in Buhera district Zimbabwe, assisted by a mobile mentorship team. Dried blood spots were tested using the bioMérieux NucliSENS assay. Patients with a VL >1,000 copies/ml received enhanced adherence counselling (EAC), including completion of a high viral load form and register and VL repeated after three months. Those with a persistently high VL were assessed for possible switch to second-line ART. Implementation of the algorithm was assessed in 2014.Routine VL testing is feasible in resource-limited settings, however, monitoring and evaluation combined with supervision of adherence to the VL algorithm is essential in order to ensure appropriate response to high VL results.

Essential components of implementation include patient education, task-shifting of sample preparation, clinician training on the VL algorithm, flagging of results via the laboratory database, implementation of a high viral load register and form, provision of EAC and decentralisation of access to second-line ART.
Provision of care for survivors of sexual violence: standardised or context-specific?
Creators: name: Lagrou, Daphne
Publisher: name: F1000Research
Year: 2015

description: MSF has three sexual violence clinics situated in Monrovia, one general hospital and five health centres in Masisi and one general hospital and two health centres in Niangara. We are asking the question: is the package of care offered by MSF adapted to the contextual needs in these settings?It was found that standardised provision of care will leave gaps. This study contributed to finding and placing the focus on contextual needs in other projects. Early and thorough analysis of routine programme data is essential to adapt programme performance quickly.

 
Supplementary File S9 from Conservation and turnover of miRNAs and their highly complementary targets in early branching animals
Creators: name: Praher, Daniela
name: Zimmermann, Bob
name: Dnyansagar, Rohit
name: Miller, David J.
name: Moya, Aurelie
name: Modepalli, Vengamanaidu
name: Fridrich, Arie
name: Sher, Daniel
name: Friis-Møller, Lene
name: Sundberg, Per
name: Fôret, Sylvain
name: Ashby, Regan
name: Moran, Yehu
name: Technau, Ulrich
Publisher: name: The Royal Society
Year: 2021
Subjects: subject: Molecular Biology
subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: 60408 Genomics

description: S9_Ami_output.pdf
Supplementary File S10 from Conservation and turnover of miRNAs and their highly complementary targets in early branching animals
Creators: name: Praher, Daniela
name: Zimmermann, Bob
name: Dnyansagar, Rohit
name: Miller, David J.
name: Moya, Aurelie
name: Modepalli, Vengamanaidu
name: Fridrich, Arie
name: Sher, Daniel
name: Friis-Møller, Lene
name: Sundberg, Per
name: Fôret, Sylvain
name: Ashby, Regan
name: Moran, Yehu
name: Technau, Ulrich
Publisher: name: The Royal Society
Year: 2021
Subjects: subject: Molecular Biology
subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: 60408 Genomics

description: S10_Adi_output.pdf
Η παραβίαση των προσωπικών δεδομένων στο διαδίκτυο με σκοπό τη διαφήμιση
Creators: name: Παπαδοπούλου, Βασιλική Ιωάννη
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Προσωπικά δεδομένα
2. Διαδικτυακή διαφήμιση
3. Παραβίαση προσωπικών δεδομένων
Personal data
Internet advertising
Violation of personal data
3. Violation of personal data

description: Σκοπός της διατριβής ήταν να ερευνήσουμε τους τρόπους με τους οποίους παραβιάζονται τα προσωπικά δεδομένα στο διαδίκτυο για λόγους διαφήμισης και ειδικά για αποστολή στοχευμένης διαφήμισης στους χρήστες του διαδικτύου. Αναφερθήκαμε στις βασικές έννοιες και στη νομοθεσία για τα προσωπικά δεδομένα. Παρουσιάσαμε τη σημασία της διαδικτυακής διαφήμισης, τα είδη της, τα χαρακτηριστικά της και τη νομοθεσία που τη διέπει. Αναλύσαμε την παραβίαση των προσωπικών δεδομένων μέσω των cookies και της συμπεριφορικής διαφήμισης. Αναφερθήκαμε στην παραβίαση των προσωπικών δεδομένων με το spamming και ειδικότερα στα spam e-mail. Παρουσιάσαμε αναλυτικά την παραβίαση των προσωπικών δεδομένων από τα μέσα κοινωνικής δικτύωσης και τις μηχανές αναζήτησης με απώτερο σκοπό την αποστολή στοχευμένης διαφήμισης. Τέλος, παρουσιάσαμε κάποιους τρόπους προστασίας του χρήστη του διαδικτύου από την παραβίαση των προσωπικών του δεδομένων και μερικά τελικά συμπεράσματα
description: The aim of the present thesis was to research the ways that personal data are violated on the internet for advertising purposes and especially for sending targeted advertising to the internet users. We referred to the basic terminology of personal data and to the relevant legislation. We introduced the importance of online advertising, its features and the legislation that governs it. We analyzed the violation of personal data through cookies and behavioral advertising. We referred to the violation of personal data through spamming and especially spam e-mail. We have shown the violation of personal data through social media and search engines for the purpose of sending targeted advertising. Finally, we presented some ways that protect the internet user’s personal data and some final conclusions
Sensitivity of low energy neutrino experiments to physics beyond the standard model
Creators: name: Barranco, J.
name: Miranda, O. G.
name: Rashba, T. I.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We study the sensitivity of future low energy neutrino experiments to extra neutral gauge bosons, leptoquarks and R-parity breaking interactions. We focus on future proposals to measure coherent neutrino-nuclei scattering and neutrino-electron elastic scattering. We introduce a new comparative analysis between these experiments and show that in different types of new physics it is possible to obtain competitive bounds to those of present and future collider experiments. For the cases of leptoquarks and R-parity breaking interactions we found that the expected sensitivity for most of the future low energy experimental setups is better than the current constraints.
description: 21 pages, 5 figures. A more detailed analysis of systematic errors is done. Final version to be published in PRD
Σχεδιασμός, σύνθεση και μελέτη της βιολογικής δράσης νέων παραγώγων του θειαδιαζολίοιυ
Creators: name: Ζαγαλιώτης, Παναγιώτης Ζήση
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Φαρμακευτική
Χημεία
Θειαδιαζόλιο
Pharmacy
Chemistry
Thiadiazole

description: Στην εργασία αυτή σχεδιάστηκαν και συντέθηκαν 12 νέες υποκατεστημένες 2-[(5-αδαμανταν-1-υλο)-1,3,4-θειαδιαζολ-2-υλ]ιμινο-5-βενζυλιδενοθειαζολιδινόνες. Ο σχεδιασμός των ενώσεων έγινε με βάση τη βιβλιογραφία και την πρόβλεψη της βιολογικής τους δράσης με τη χρήση του υπολογιστικού προγράμματος PASS. Οι προαναφερθείσες ενώσεις συντέθηκαν σε 5 στάδια. Τα τελικά, καθώς και τα ενδιάμεσα προϊόντα ταυτοποιήθηκαν με φασματοσκοπία πυρηνικού μαγνητικού συντονισμού (1H-NMR και 13C-NMR) και φασματοσκοπία υπερύθρου (IR), ενώ για τον έλεγχο της καθαρότητάς τους πραγματοποιήθηκε και προσδιορισμός του σημείου τήξης (Σ.Τ.). Η υπολογιστική πρόβλεψη της λιποφιλικότητας των τελικών ενώσεων έγινε με τη χρήση του προγράμματος ChemDraw. Η λιποφιλικότητα εκφράστηκε σε τιμές clogP. Ο υπολογισμός της τοξικότητας των ενώσεων έγινε με τα προγράμματα CBLigand και PROTOX. Η υπολογιστή μελέτη πρόσδεσης των ενώσεων (docking) έγινε με το πρόγραμμα Autodock 4.2. Τέλος, μελετήθηκε η αντιμικροβιακή δράση των ενώσεων έναντι θετικών και αρνητικών κατά Gram βακτηρίων και ορισμένων μυκήτων, ενώ πραγματοποιήθηκε και έλεγχος της in vivo αντιφλεγμονώδους δράσης των ενώσεων με τη χρήση του προτύπου της καραγενίνης.
description: In the present thesis we designed and synthesized 12 new substituted 2[(5-adamantan-1-yl)-1,3,4-thiadiazol-2-yl]imin-5-benzylidenethiazolidinones. The design of the substances was performed based on the publications as well as the prediction of their biological activity using the calculating program PASS. The aforementioned substances were synthesized in 5 stages. The final, as well as the intermediate products were identified with the use of 1H-NMR, 13C-NMR and IR spectroscopy, whereas for the control of their purity, determination of their melting point was performed. The calculative prediction of the lipophilicity of the substances was performed with the ChemDraw program. The lipophilicity was expressed in clogP units. The determination of the substances toxicity was performed with the use of CBLigand and PROTOX programs. The docking was performed with the Autodock 4.2 software. Finally, the antimicrobial of the substances was studied, against Gram (-) and Gram (+) bacteria and some fungi, and and the anti-inflammatory activity of the substances was determined with the use of the carageenan model.
A stochastic Lagrangian proof of global existence of the Navier-Stokes equations for flows with small Reynolds number
Creators: name: Iyer, Gautam
Publisher: name: arXiv
Year: 2007
Subjects: subject: Analysis of PDEs (math.AP)
subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 76D03; 76D05; 60K40

description: We consider the incompressible Navier-Stokes equations with spatially periodic boundary conditions. If the Reynolds number is small enough we provide an elementary short proof of the existence of global in time Hölder continuous solutions. Our proof is based on the stochastic Lagrangian formulation of the Navier-Stokes equations, and works in both the two and three dimensional situation.
description: 10 pages, no figures
TACOS: TESS AM~CVn Outbursts Survey
Creators: name: Marcano, Manuel Pichardo
name: Sandoval, Liliana E. Rivera
name: Maccarone, Thomas J.
name: Scaringi, Simone
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Using \emph{TESS} we are doing a systematic study of outbursting AM~CVn systems to place some limits on the current outbursts models. We present the \emph{TESS} light curve (LC) for 9 AM~CVns showing both superoutbursts (SOs) and normal outbursts (NOs). The continuous coverage of the outbursts with \emph{TESS} allows us to place stringent limits on the duration and structures of the SOs and the NOs. We present evidence that in at least some of the systems enhanced mass transfer (EMT) has to be taken into account to explain the observed LC of the SOs and rebrighthening phase after the SOs. For others, the colour evolution from simultaneous observations in $g$ and $r$ with ZTF differs from previously reported colour evolution of longer period AM~CVns where EMT is responsible for the SO. We also find that due to the lack of sufficiently high cadence coverage the duration of many systems might have been overestimated in previous ground-based surveys. We report the SO duration for 6 AM~CVns. We also found that precursors are a common feature of SOs in AM~CVns and are seen in the LC of 5 of the 6 reported SOs. Finally, the 10-minute and 2-minute cadence LCs from \emph{TESS} also allowed us to find two new candidate orbital periods of AM~CVns, both of which are in reasonably good agreement with the predictions for their periods based on their past outburst histories.
description: Accepted for publication to MNRAS
Gravitational Backreaction of Matter Inhomogeneities
Creators: name: Gruzinov, A.
name: Kleban, M.
name: Porrati, M.
name: Redi, M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The non-linearity of Einstein's equations makes it possible for small-scale matter inhomogeneities to affect the Universe at cosmological distances. We study the size of such effects using a simple heuristic model that captures the most important backreaction effect due to nonrelativistc matter, as well as several exact solutions describing inhomogeneous and anisotropic expanding universes. We find that the effects are $O(H^2l^2/c^2)$ or smaller, where $H$ is the Hubble parameter and $l$ the typical size scale of inhomogeneities. For virialized structures this is of order $v^2/c^2$, where $v$ is the characteristic peculiar velocity.
description: 16 pages
Πλασμονικοί κυματοδηγοί σε ολοκληρωμένα φωτονικά κυκλώματα πυριτίου: Σχεδίαση και πειραματικός χαρακτηρισμός
Creators: name: Μανώλης, Αθανάσιος Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Φωτονικά ολοκληρωμένα κυκλώματα
Πλασμονική τεχνολογία
Επιφανειακά πλασμόνια
Photonic integrated circuits
Plasmonic technology
Surface plasmons

description: Η εργασία αυτή παρουσιάζει την συνένωση χρυσών πλασμονικών κυματοδηγών με κυματοδηγούς νιτριδίου του πυριτίου μέσω μιας οριζόντιας διεπαφής υποστηρίζοντας πλασμονικούς ρυθμούς σε υδάτινο περιβάλλον. Η προτεινόμενη διεπαφή σχεδιάστηκε, κατασκευάστηκε και χαρακτηρίστηκε πειραματικά για τις απώλειες διάδοσης στον πλασμονικό κυματοδηγό αλλά και της απώλειες σύζευξης από τον έναν τύπο κυματοδηγού στον άλλον. Επιπλέον, μελετήθηκαν και οι απώλειες εισαγωγής στο τσιπ μέσω συζευκτών φραγμάτων περίθλασης. Με αυτό τον τρόπο η συγκεκριμένη δομή μπορεί σε επόμενο στάδιο να αξιοποιηθεί ως επιμέρους στοιχείο ενός πλασμο-φωτονικού κυματοδηγού για τη μετάδοση πληροφορίας σε εφαρμογές επικοινωνιών αξιοποιώντας την φύση των πλασμονικών κυματοδηγών να μεταφέρουν τόσο ηλεκτρική ισχύ όσο και οπτική ταυτοχρόνως. Επιπλέον, η μεγάλη διακριτική ικανότητα των πλασμονικών κυματοδηγών σε αλλαγές στο δείκτη διάθλασης του μέσου το οποίο τους περιβάλλει μπορούν να αξιοποιηθούν και σε εφαρμογές πλασμο-φωτονικών αισθητήρων.
description: In the present thesis, gold-based plasmonic stripes butt-coupled with Si3N4-based waveguides are demonstrated for the excitation of Surface-Plasmon-Polariton (SPP) modes in aqueous environment. The proposed structure was designed, fabricated and experimentally characterized in terms of plasmonic propagation and insertion losses. Moreover, insertion losses of the Si3N4 grating couplers were also investigated for Transverse Magnetic (TM) polarization. In this way the proposed structure can be utilized as a component of a plasmo-photonic waveguide for the transmission of information in communication applications by exploiting the nature of the plasmonic waveguides to carry both electrical power and optical simultaneously. In addition, the large discretion of plasmonic waveguides in changes in the refractive index of the surrounding medium can be exploited in plasmo-photonic sensor applications as well.
Supplementary File S7 from Conservation and turnover of miRNAs and their highly complementary targets in early branching animals
Creators: name: Praher, Daniela
name: Zimmermann, Bob
name: Dnyansagar, Rohit
name: Miller, David J.
name: Moya, Aurelie
name: Modepalli, Vengamanaidu
name: Fridrich, Arie
name: Sher, Daniel
name: Friis-Møller, Lene
name: Sundberg, Per
name: Fôret, Sylvain
name: Ashby, Regan
name: Moran, Yehu
name: Technau, Ulrich
Publisher: name: The Royal Society
Year: 2021
Subjects: subject: Molecular Biology
subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: 60408 Genomics

description: S7_Epa_output.pdf
A Simple Explicit-Solvent Model of Polyampholyte Phase Behaviors and its Ramifications for Dielectric Effects in Biomolecular Condensates
Creators: name: Wessén, Jonas
name: Pal, Tanmoy
name: Das, Suman
name: Lin, Yi-Hsuan
name: Chan, Hue Sun
Publisher: name: arXiv
Year: 2021
Subjects: subject: Biomolecules (q-bio.BM)
subject: FOS: Biological sciences

description: Biomolecular condensates such as membraneless organelles, underpinned by liquid-liquid phase separation (LLPS), are important for physiological function, with electrostatics -- among other interaction types -- being a prominent force in their assembly. Charge interactions of intrinsically disordered proteins (IDPs) and other biomolecules are sensitive to the aqueous dielectric environment. Because the relative permittivity of protein is significantly lower than that of water, the interior of an IDP condensate is a relatively low-dielectric regime, which, aside from its possible functional effects on client molecules, should facilitate stronger electrostatic interactions among the scaffold IDPs. To gain insight into this LLPS-induced dielectric heterogeneity, addressing in particular whether a low-dielectric condensed phase entails more favorable LLPS than that posited by assuming IDP electrostatic interactions are uniformly modulated by the higher dielectric constant of the pure solvent, we consider a simplified multiple-chain model of polyampholytes immersed in explicit solvents that are either polarizable or possess a permanent dipole. Notably, simulated phase behaviors of these systems exhibit only minor to moderate differences from those obtained using implicit-solvent models with a uniform relative permittivity equals to that of pure solvent. Buttressed by theoretical treatments developed here using random phase approximation and polymer field-theoretic simulations, these observations indicate a partial compensation of effects between favorable solvent-mediated interactions among the polyampholytes in the condensed phase and favorable polyampholyte-solvent interactions in the dilute phase, often netting only a minor enhancement of overall LLPS propensity from the very dielectric heterogeneity that arises from the LLPS itself. Further ramifications of this principle are discussed.
description: 54 pages, 14 figures, 1 table, and 132 references. Accepted for publication in the Journal of Physical Chemistry B ("Liquid-Liquid Phase Separation" Special Issue)
An algorithm for computing the riemann zeta function based on an analysis of Backlund’s remainder estimate
Creators: name: Menz, Petra Margarete
Publisher: name: University of British Columbia
Year: 2009

description: The Riemann zeta function, Ϛ(s) with complex argument s, is a widely used special function in mathematics. This thesis is motivated by the need of a cost reducing algorithm for the computation of Ϛ (s) using its Euler-Maclaurin series. The difficulty lies in finding small upper bounds, call them n and k, for the two sums in the Euler-Maclaurin series of Ϛ (s) which will compute Ϛ (s) to within any given accuracy for any complex argument s, and provide optimal computational cost in the use of the Euler-Maclaurin series. This work is based on Backlund’s remainder estimate for the Euler-Maclaurin remain- der, since it provides a close enough relationship between n, k, s, and е. We assumed that the cost of computing the Bernoulli numbers, which appear in the series, is fixed, and briefly discuss how this may influence high precision calculation. Based on our study of the behavior of Backlund’s remainder estimate, we define the ‘best’ pair (n, k), and present a reliable method of computing the best pair. Furthermore, based on a compu- tational analysis, we conjecture that there is a relationship between n and k which does not depend on s. We present two algorithms, one based on our method and the other on the conjecture, and compare their costs of finding n and k as well as computing the Euler-Maclaurin series with an algorithm presented by Cohen and Olivier. We conclude that our algorithm reduces the cost of computing Ϛ(s) drastically, and that good numerical techniques need to be applied to our method and conjecture for finding n and k in order to keep this computational cost low as well.
Εφαρμογή των POS στις ηλεκτρονικές συναλλαγές και αξιολόγηση της αποδοχής τους στην Ελλάδα
Creators: name: Τάσκας, Κωνσταντίνος Μενέλαου
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Αποδοχή POS
Θεωρία διάχυσης καινοτομίας
SPSS στατιστική ανάλυση
POS acceptance
IDT model
SPSS

description: Στην εργασία ερευνώνται οι παράγοντες που επηρεάζουν την αποδοχή της τεχνολογίας των POS (point of sales systems) στην Ελλάδα, με το ευρέως διαδεδομένο μοντέλο αποδοχής, IDT (Innovation Diffusion Theory). Η μέθοδος που ακολουθήθηκε, ήταν η δειγματοληπτική έρευνα, μέσω έντυπου ερωτηματολογίου. Το δείγμα αποτελείται από 113 ερωτηματολόγια και συλλέχθηκε με δειγματοληψία ευκολίας και χιονοστιβάδας. Το πρόγραμμα που χρησιμοποιήθηκε για την επεξεργασία του δείγματος είναι το SPSS. Οι ερευνητικές υποθέσεις που υιοθετήθηκαν μετά από μελέτη της διεθνούς βιβλιογραφίας περιλαμβάνουν την μελέτη αποδοχής των POS στην Ελλάδα σε σχέση με διάφορους δημογραφικούς και άλλους παράγοντες κυρίως από το μοντέλο IDT, όπως το σχετικό πλεονέκτημα, η συμβατότητα, η πολυπλοκότητα, η δυνατότητα παρατήρησης, η δυνατότητα δοκιμής και το αντιλαμβανόμενο ρίσκο. Τα αποτελέσματα της έρευνας επιβεβαίωσαν όλες τις ερευνητικές υποθέσεις που τέθηκαν εκτός από μία, που αφορούσε στον τρόπο που επηρεάζει η ηλικία των χρηστών, την αποδοχή των POS. Συγκεκριμένα, θετικά βρέθηκε να επιδρούν στην αποδοχή των POS το σχετικό πλεονέκτημα, η συμβατότητα, η δυνατότητα παρατήρησης , η δυνατότητα δοκιμής και το μορφωτικό επίπεδο. Αρνητική επίδραση είχαν η πολυπλοκότητα και το αντιλαμβανόμενο ρίσκο. Η ηλικία βρέθηκε να έχει αρνητική επίδραση αλλά στατιστικά μη σημαντική.
description: This study investigates the factors that affect the acceptance of POS (point of sales) technology by Greek consumers, applying the widespread model, IDT (Innovation Diffusion Theory). A survey sampling method was applied for the purposes of the study, including 113 questionnaires, sampled based on the convenience and snowball technique and the results were analyzed with SPSS software. The research cases were adopted based on a literature review of POS acceptance in relation to various demographic and other factors, mainly by the IDT model, such as the relative advantage, compatibility, complexity, observability, trialability and perceived risk. The results verified the research cases, except of one that concerns the effect of age. Specifically, relative advantage, compatibility, observability, trialability and educational level positively affect the acceptance of POS, while complexity and perceived risk negatively affect POS acceptance in Greece. In particular, the effect of age was found to have a negative effect on POS acceptance but statistically non-significant.
description: Σε συνεργασία με: Λογιστικής και Χρηματοοικονομικής (Πανεπιστήμιο Μακεδονίας)
Συνέργειες αγροδιατροφικού και τουριστικού τομέα: «Η περίπτωση της Μακεδονίας και της Θράκης»
Creators: name: Βοργιανίτη, Αικατερίνη Βασιλείου
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: subject: Συνέργειες
subject: Αγροδιατροφικός τομέας
subject: Τουρισμός
subject: Linkages
subject: Agriculture
subject: Tourism
subject: FOS: Economics and business

description: Η παρούσα διπλωματική εργασία επιχειρεί να αναλύσει τη σημασία και το ρόλο των συνεργειών αγροδιατροφικού και τουριστικού τομέα για την περιφερειακή και κατ’επέκταση εθνική ανάπτυξη μιας οικονομίας. Ειδικότερα σήμερα που η Ελλάδα μαστίζεται από μια διευρυμένη σε όλους τους τομείς οικονομική κρίση, η ανάγκη συνέργειας μεταξύ των επιχειρήσεων για την επίτευξη ανταγωνιστικού πλεονεκτήματος κρίνεται αναγκαία. Στη συγκεκριμένη μελέτη παρουσιάζονται τα οφέλη των επιχειρηματικών δικτυώσεων αγροδιατροφικού τομέα και τουρισμού, οι λόγοι που εμποδίζουν τις δικτυώσεις αυτές, ενώ παράλληλα γίνεται μια εκτενής καταγραφή των συνεργειών στο διεθνή και ελλαδικό χώρο .Στη συνέχεια η έρευνα επεκτείνεται στην περιοχή της Μακεδονίας και της Θράκης, όπου αφού γίνει ανάλυση των χαρακτηριστικών των περιφερειών της, συλλέγονται πρωτογενή δεδομένα με τη μορφή ερωτηματολογίων από τουριστικά ξενοδοχεία της Θεσσαλονίκης και της Περαίας με σκοπό την εξέταση των ήδη υπαρχουσών cluster και την πρόθεση για νέες επιχειρηματικές συνεργασίες παραγωγών και τουριστικών επαγγελματιών. Η μελέτη περίπτωσης δείχνει ότι υπάρχουν δυνατότητες για τη δημιουργία συνεργειών αγροδιατροφικού και τουριστικού τομέα ακολουθώντας μέτρα κατάλληλης πολιτικής, ώστε ο τουρισμός να γίνει μοχλός ανάπτυξης της εθνικής μας οικονομίας.
description: The aim of this study is an analysis over the significance of establishing synergies between agriculture and tourism in order to succeed economic development in a regional and national level. Particularly nowadays, since that great economic crisis has stroke Greece, it is rather important to create business clusters so as to maximize the benefits of tourism to the local population. In this paper is attempted to present the advantages of local food linkages with high-end accommodation properties for stakeholders, the restraints on their formation, while in the meantime case studies throughout the world are exhibited. The research is expanding in the region of Central Macedonia and Thrace, where primary data through questionnaires answered by hotels in Thessaloniki and Perea are collected for the purpose of the examination of the existing clusters and the intention of forming new ones. The findings from our exemplary case study, suggest that there are opportunities for creating and strengthening inter-sectorial linkages through the implementation of the appropriate policies and strategies in order to spread the economic spin off from tourism.
Ο Ποιμένας και Τα Σύγχρονα Μέσα Κοινωνικής Δικτύωσης
Creators: name: Botros, Loris George
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Ποιμένας - Ποιμαντική
Διαδίκτυο
Επικοινωνία
Priest – Pastoral Care
Internet
Communication

description: Σκοπός της διατριβής ήταν η μελέτη της διαπροσωπικής επικοινωνίας μεταξύ του ποιμένα και των ενοριτών του μέσα στα σύγχρονα μέσα κοινωνικής δικτύωσης (ΜΚΔ) στην περίπτωση της προσωπικής σελίδας του ποιμένα ειδικά στο Facebook. Εξετάσαμε την έννοια της επικοινωνία, και το σχήμα της και αναλύσαμε τα οκτώ στοιχεία της διαδικασία της γενικά. Στην συνέχεια παρουσιάσαμε την ιστορική εξέλιξη του Web, τα χαρακτηριστικά των μέσων κοινωνικής δικτύωσης και τους λόγους χρήσης τους, και μας απασχόλησε ειδικά την επικοινωνία μέσα του Facebook. Ακόμη αναφερθήκαμε αναλυτικά τον ρόλο του ποιμένα και τα ποιμαντικά καθήκοντά του, την σχέση μεταξύ της επικοινωνίας και της ποιμαντικής του, και την ανάλυση των οκτώ στοιχείων της επικοινωνίας του. Ένα άλλο θέμα που θίξαμε ήταν η σχέση της τεχνολογίας με την χριστιανική ηθική και της πιστής. Ασχοληθήκαμε επιπλέον με μερικές μεταβολές στην σύγχρονη ποιμαντική διακονία, και τον προσδιορισμό των αρχείων της επικοινωνίας του ποιμένα μέσα στα μέσα κοινωνικής δικτύωσης.
description: The aim of the present thesis was to study the interpersonal communication between the priest and his parishioners within the modern social media tools in the case of the priest’s “personal page” especially on Facebook. We examined the concept of communication and its shape and analyzed the eight elements of its process in general. Then we presented the historical evolution of Web, the features of social media, and the reasons for using them, especially focused on “Facebook Communication”. We have also given a detailed account of the role of priest and his pastoral duties, the relationship between communication and pastoralism, and the analysis of the eight elements of his communication. Another issue that we examined was the relationship between faith, technology and Christian ethics. We have also dealt with some changes in the modern pastoral ministry, and the identification of priest’s communication using Social Media.
Οικονομική μεγέθυνση, διαφθορά και δημόσιες δαπάνες. Μια εμπειρική διερεύνηση άμεσης γραμμικής σχέσης
Creators: name: Κατσούκη, Αναστασία Χρήστου
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Οικονομική μεγέθυνση
Διαφθορά
Δημόσιες δαπάνες
Economic growth
Corruption
Government expenditures

description: Η συγκεκριμένη εμπειρική μελέτη σκοπό έχει να ερευνήσει την άμεση σχέση της διαφθοράς και της οικονομικής μεγέθυνσης με την χρήση πρόσθετων ερμηνευτικών μεταβλητών, όπως γενικές δημόσιες δαπάνες, στρατιωτικές – αμυντικές δαπάνες, δημόσιες δαπάνες για την εκπαίδευση, δημόσιες επενδύσεις, ανθρώπινο κεφάλαιο και ρυθμός αύξησης πληθυσμού. Με την χρήση πάνελ δεδομένων 60 χωρών για την χρονική περίοδο 1949 – 2016 τα εμπειρικά αποτελέσματα της παρούσας μελέτης έδειξαν, στατιστικά σημαντική αρνητική σχέση της διαφθοράς στην οικονομική μεγέθυνση για τις χώρες μεσαίου εισοδήματος, στατιστικά σημαντική αρνητική επίδραση των γενικών δημοσίων δαπανών στην οικονομική μεγέθυνση, στατιστικά σημαντική αρνητική επίδραση των μεταβλητών στρατιωτικών – αμυντικών δαπανών και δημοσίων δαπανών εκπαίδευσης στην οικονομική μεγέθυνση για το σύνολο των 60 χωρών και για τις υψηλά εισοδηματικές χώρες, στατιστικά σημαντική θετική επίδραση των δημοσίων επενδύσεων στην οικονομική μεγέθυνση και τέλος στατιστικά σημαντική επίδραση του ανθρώπινου κεφαλαίου στην οικονομική μεγέθυνση για το σύνολο των 60 χωρών και των μεσαίων εισοδηματικά χωρών. Αδιαμφισβήτητα η διαφθορά δυσχεραίνει, αποτελεί τροχοπέδη, αποτελεί την "άμμο" στους τροχούς της οικονομικής μεγέθυνσης.
description: The purpose of our empirical research is to investigate the direct effect of corruption on economic growth. Our panel data set also includes a set of explanatory variables, such as government expenditures, military expenditures, government expenditures on education, gross fixed capital formation, human capital and population for 60 countries during the period of 1949 – 2016. We find a negative statistically significant effect of corruption on economic growth for the middle income countries and a negative statistically significant effect of total government expenditures, military expenditures and government expenditures on education on economic growth for the full sample of 60 countries. However, for the high income countries, we find a positive statistically significant effect of gross fixed capital formation on economic growth. Finally, we find no impact of population on economic growth but we do find a negative statistically significant impact of human capital on economic growth for the full sample of 60 countries and for the middle income countries. Without doubt corruption constitutes a negative factor for economic growth. Last but not least, to summarize corruption "sand’ s" economic development.
Development of an automated marking machine for live fish with application in fishery management
Creators: name: Dong, Chunli
Publisher: name: University of British Columbia
Year: 2009

description: Spray marking of fish, using fluorescent pigment propelled by compressed air, is a mass marking technique, and is useful in the studies of fishery management. This method typically uses a conveyor system to transport fish into a marking unit that dispenses the powdered pigment through a nozzle with the aid of compressed air. The marked juvenile fish are then released to continue their life cycle, and may be subsequently caught for the purpose of experimental investigation. The previous design of the marking machine (MK-5) had many shortcomings. In particular, the pigment dust caused worker discomfort and possible environmental pollution, overlapping of fish on the conveyor resulted in poor marking quality, and improper feeding and conveying caused injury and mortality in fish during marking. Due to these, the marking machine MK-5 was not widely used. In the present work, a new prototype of the automated spray marking machine was designed and built in the Industrial Automation Laboratory at the University of British Columbia. The new design was based on studies related to pigment emulsion, compressed air pressure, zig-zag shaped feeder channel, conveyor belt compartmentalization and pigment recycling. Image processing for assessing the retention of fluorescent pigment mark on fish body was investigated by first developing retention indices, and subsequently using appropriate image processing techniques such as the dilation and erosion of mark density, in order to recover an aged mark. Our design developments have led to a fast, accurate, reliable, low-cost and environmentally friendly system for marking fish. The prototype has been tested at several hatchery sites in British Columbia and has thus far exhibited good performance.
Scaling-up access to second-line antiretroviral therapy in rural Zimbabwe: impact of routine viral load, model of care and re-suppression after switch
Creators: name: Y Htung Naing
name: H Bygrave
name: C Metcalf
name: M Dhodho
name: S Simons
name: T Bonyo
name: G Chenjirai
name: J Steinberg
Publisher: name: F1000Research
Year: 2015

description: In many resource-limited settings, access to second-line ART is centralised at district or national level, and is prescribed only by doctors. After implementing routine VL monitoring in two rural districts in Zimbabwe in 2012, switching of patients to second-line ART and their follow-up was decentralised to all primary care clinics, and carried-out by a multidisciplinary team. Second-line ART initiations increased from 13 in 2011 to 243 in 2014.

The aim of this study was to describe the viral load (VL) response of patients switched to second-line antiretroviral therapy (ART), and to determine factors associated with failure of viral suppression post switch.Although the majority of patients responded to second-line ART, a sizeable minority had an inadequate response. This illustrates the importance of ongoing VL monitoring and adherence counselling for patients on second-line ART. Children and adolescents are at particular risk of ongoing adherence challenges, resulting in a poor response to second-line ART.