cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Adult literacy and development in Sierra Leone : ideals and realities
Creators: name: Bockarie, Abu Mohamed
Publisher: name: University of British Columbia
Year: 2009

description: Developing successful 'literacy for development programmes' for adults remains a critical issue for many Third World policy makers and educators. The purpose of this study was to describe and analyze Sierra Leone's educational reform policies and practices between 1970 and 1992 with regard to adult literacy in order to understand the factors associated with the successful and unsuccessful outcomes of adult literacy programmes. The chief theoretical perspective that informed the research concerned the socio-economic, educational, historical and political ecology of adult literacy work. Literacy work was problematized as a complex process deeply rooted in a nation's social, economic and political structures. A conceptual framework depicting three analytic categories of factors associated with the successful and unsuccessful outcomes of adult literacy programmes in Third World societies was developed from an extensive review of literacy literature. These categories were labelled as macro-level factors, meso-level factors and micro-level factors. The 'orchestration' or 'combination' of all three analytic categories of factors was viewed as critical in in uderstanding the factors associated with the success and failure of adult literacy programmes operating in the country. The basic method of data collection was semi-structured interview. Other data sources included policy documents, official statistics and observations. The study found that seven principal factors were associated with the success and failure of adult literacy programmes. It was the conclusion of the study that: (i) international forces, social-historical features of Sierra Leone society as well as organisational and administrative support were as critical to the success or failure of adult literacy programmes as were the educational features and circumstances of illiterate adults; (ii) contrary to the rhetoric expressed in policy documents and pronouncements, the solutions to Sierra Leone's underdevelopment problems were probably beyond the reach of increased literacy per se to remedy and; (iii) in their current form, adult literacy programmes were probably functioning as instruments of the state and the nation's elites, contributing to the legitimation of government and elite authority. The implications of the study for policy, practice, theory and further research as well as the recommendations arising from it are discussed.
Bat occurrence and habitat preference on the Delmarva Peninsula
Creators: name: McGowan, Andrew
Publisher: name: Maryland Shared Open Access Repository
Year: 2015
Subjects: bats
Delmarva Peninsula
habitat

description: The Delmarva Peninsula forms the eastern margin of the United States’ largest estuary. Dominated by forests, wetlands, and agriculture, it provides valuable habitat for bats, and, in turn, relies on the ecosystem services provided by them. Despite this important interdependence, little is known about the bats of Delmarva. With the emerging threats of both White-Nose Syndrome (WNS) and wind turbine facilities in the region, an assessment of the peninsula’s bat fauna and the habitats these animals depend on was needed. To accomplish this I acoustically monitored bats along 28 driving transects (using two different sampling techniques) and 24 passive monitoring sites across the peninsula in the summer of 2014. In total, I recorded 4432 bat call sequences and documented the presence of at least 7 species: L. borealis, E. fuscus, N. humeralis, L. noctivagans, L. cinereus, P. subflavus, and one or more Myotis species. All but the latter two were relatively widespread and abundant. Of the species for which adequate sample sizes were available, all but L. noctivagans and L. cinereus showed strong preferences for forest edges, linear tree features, and tree-lined water bodies over all other habitat variables measured, demonstrating the importance of these landscape features for maintaining healthy bat populations. Our comparisons of continuous sampling driving transects, point count sampling driving transects, and stationary passive monitoring revealed that all three yield largely similar results, suggesting driving transects using high sensitivity microphones are a valuable tool for surveying bat populations across large geographic areas.
Electron ptychography achieves atomic-resolution limits set by lattice vibrations
Creators: name: Chen, Zhen
name: Jiang, Yi
name: Shao, Yu-Tsun
name: Holtz, Megan E.
name: Odstrčil, Michal
name: Guizar-Sicairos, Manuel
name: Hanke, Isabelle
name: Ganschow, Steffen
name: Schlom, Darrell G.
name: Muller, David A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Transmission electron microscopes use electrons with wavelengths of a few picometers, potentially capable of imaging individual atoms in solids at a resolution ultimately set by the intrinsic size of an atom. Unfortunately, due to imperfections in the imaging lenses and multiple scattering of electrons in the sample, the image resolution reached is 3 to 10 times worse. Here, by inversely solving the multiple scattering problem and overcoming the aberrations of the electron probe using electron ptychography to recover a linear phase response in thick samples, we demonstrate an instrumental blurring of under 20 picometers. The widths of atomic columns in the measured electrostatic potential are now no longer limited by the imaging system, but instead by the thermal fluctuations of the atoms. We also demonstrate that electron ptychography can potentially reach a sub-nanometer depth resolution and locate embedded atomic dopants in all three dimensions with only a single projection measurement.
description: 13 pages and 4 figures in the main text. Supplementary materials included
Διερεύνηση της έκφρασης των πρωτεϊνών θερμικού πλήγματος και p53 σε φυσιολογικές και παθολογικές καταστάσεις στο μεσογειακό μύδι Mytilus galloprovincialis:
Creators: name: Παπαδοπούλου, Βασιλική Ηλία
Publisher: name: Aristotle University of Thessaloniki
Year: 2014
Subjects: μεσογειακό μύδι
γονίδια θερμικού πλήγματος
ισομορφές p53
Mytilus galloprovincialis
Heat shock genes
p53 isoforms

description: Σκοπός της παρούσας μελέτης ήταν η διερεύνηση της λευχαιμίας στο είδος Mytilus galloprovincialis σε δύο διαφορετικές περιοχές του Θερμαϊκού κόλπου. Στα πλαίσια της διπλωματικής εργασίας, έγινε σύγκριση της έκφρασης σε μεταγραφικό επίπεδο των τριών ισομορφών p53, των hsp90 και των στρεσοεπαγόμενων hsp70 γονιδίων ανάμεσα σε φυσιολογικά και λευχαιμικά μύδια. Βιολογικό υλικό για την παραπάνω σύγκριση απομονώθηκε από τρεις διαφορετικούς ιστούς των ατόμων. Επιπλέον, πραγματοποιήθηκε έλεγχος των συσχετίσεων έκφρασης των υπό μελέτη γονιδίων ανά ζεύγη. Επιπρόσθετα, αναλύθηκαν τα πρότυπα έκφρασης για κάθε γονίδιο ανά ιστό και για τις δύο δειγματοληψίες καθώς και για το ενιαίο σύνολο δεδομένων.
description: The aim of the present study was to investigate the presence of leukemia in Mytilus galloprovincialis in two different areas of the Thermaikos Gulf. In the context of this thesis, we compared the expression of the three p53 isoforms, hsp90 and stress-induced hsp70 genes between normal and leukemic mussels at the transcriptional level. Biological material for the above comparison was isolated from three different tissues of individuals. Furthermore, we performed correlation tests to investigate possible correlation of expression between the studied genes. We also analyzed the expression patterns of the genes per tissue for the two distinct datasets as well as for the integrated dataset.
Evidence for Differential Rotation on a T Tauri Star
Creators: name: Herbst, W.
name: Dhital, S.
name: Francis, A.
name: Lin, L.
name: Tresser, N.
name: Williams, E.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Five years of photometric monitoring of the T Tauri star HBC 338 in NGC 1333 has revealed that it is a periodic variable, but the period has changed significantly with time. From 2000-2003, a period near 5.6 days was observed, while in the last two seasons, the dominant period is near 4.6 days. No other T Tauri star has been seen to change its period by such a large percentage. We propose a model in which a differentially rotating star is seen nearly equator-on and a high latitude spot has gradually been replaced by a low latitude spot. We show that this model provides an excellent fit to the observed shapes of the light curves at each epoch. The amplitude and sense of the inferred differential rotation is similar to what is seen on the Sun. This may be surprising given the likely high degree of magnetic surface activity on the star relative to the Sun but we note that HBC 338 is clearly an exceptional T Tauri star.
description: Acepted for publication in PASP
The effect of price-based demand response on carbon emissions in European electricity markets: The importance of adequate carbon prices
Creators: name: Fleschutz, Markus
name: Bohlayer, Markus
name: Braun, Marco
name: Henze, Gregor
name: Murphy, Michael D.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Price-based demand response (PBDR) has recently been attributed great economic but also environmental potential. However, the determination of its short-term effects on carbon emissions requires the knowledge of marginal emission factors (MEFs), which compared to grid mix emission factors (XEFs), are cumbersome to calculate due to the complex characteristics of national electricity markets. This study, therefore, proposes two merit order-based methods to approximate hourly MEFs and applies it to readily available datasets from 20 European countries for the years 2017-2019. Based on the resulting electricity prices, MEFs, and XEFs, standardized daily load shifts were simulated to quantify their effects on marginal costs and carbon emissions. Finally, by repeating the load shift simulations for different carbon price levels, the impact of the carbon price on the resulting carbon emissions was analyzed. Interestingly, the simulated price-based load shifts led to increases in operational carbon emissions for 8 of the 20 countries and to an average increase of 2.1% across all 20 countries. Switching from price-based to MEF-based load shifts reduced the corresponding carbon emissions to a decrease of 35%, albeit with 56% lower monetary cost savings compared to the price-based load shifts. Under specific circumstances, PBDR leads to an increase in carbon emissions, mainly due to the economic advantage fuel sources such as lignite and coal have in the merit order. However, as the price of carbon is increased, the correlation between the carbon intensity and the marginal cost of the fuels substantially increases. Therefore, with adequate carbon prices, PBDR can be an effective tool for both economical and environmental improvement.
Constraining the Ionospheric Impacts of Exoplanet Host Star Emission
Creators: name: Farrish, Alison O.
name: Alexander, David
name: Johns-Krull, Christopher M.
name: Sciola, Anthony M.
name: Toffoletto, Frank
name: Barnes, Will
Publisher: name: Zenodo
Year: 2021

description: We employ a surface flux transport (SFT) model in order to simulate the detailed magnetic structure and dynamics of exoplanet host star photospheres. In coupling the SFT model with a potential-field source surface (PFSS) extrapolation of coronal field, and with a suite of forward-modeling tools for the derivation of coronal X-ray and EUV emission, we simulate self-consistently the magnetic structure and energetic budget of host star surfaces and coronae. In particular, our modeling framework can be used to determine magnetic field structure and plasma emission of a host star with finely-gridded 3-dimensional spatial information as well as complete temporal coverage over stellar cycle timescales. In order to constrain exoplanet space physics environments with an eye toward questions of habitability, we examine the relation between host star X-ray and EUV emission and planetary ionospheric response. We employ a relation between stellar emission input to the planetary environment and changes in ionospheric conductance, Joule heating, and the resulting radio emission. We aim to explore the conditions of star-planet interaction that might lead to observable radio signatures of exoplanet ionospheric activity. Radio emission signatures from exoplanet systems, if found, would contribute greatly to our understanding of the ionospheric and magnetospheric behavior of planets outside of our Solar System.
Direct Measurements of the Stellar Continua and Balmer/4000 Angstrom Breaks of Red z>2 Galaxies: Redshifts and Improved Constraints on Stellar Populations
Creators: name: Kriek, Mariska
name: van Dokkum, Pieter
name: Franx, Marijn
name: Schreiber, Natascha Forster
name: Gawiser, Eric
name: Illingworth, Garth
name: Labbe, Ivo
name: Marchesini, Danilo
name: Quadri, Ryan
name: Rix, Hans-Walter
name: Rudnick, Gregory
name: Toft, Sune
name: van der Werf, Paul
name: Wuyts, Stijn
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We use near-infrared (NIR) spectroscopy obtained with GNIRS on Gemini, NIRSPEC on KECK, and ISAAC on the VLT to study the rest-frame optical continua of three `Distant Red Galaxies' (having Js - Ks > 2.3) at z>2. All three galaxy spectra show the Balmer/4000 Angstrom break in the rest-frame optical. The spectra allow us to determine spectroscopic redshifts from the continuum with an estimated accuracy dz/(1+z) ~ 0.001-0.04. These redshifts agree well with the emission line redshifts for the 2 galaxies with Halpha emission. This technique is particularly important for galaxies that are faint in the rest-frame UV, as they are underrepresented in high redshift samples selected in optical surveys and are too faint for optical spectroscopy. Furthermore, we use the break, continuum shape, and equivalent width of Halpha together with evolutionary synthesis models to constrain the age, star formation timescale, dust content, stellar mass and star formation rate of the galaxies. Inclusion of the NIR spectra in the stellar population fits greatly reduces the range of possible solutions for stellar population properties. We find that the stellar populations differ greatly among the three galaxies, ranging from a young dusty starburst with a small break and strong emission lines to an evolved galaxy with a strong break and no detected line emission. The dusty starburst galaxy has an age of 0.3 Gyr and a stellar mass of 1*10^11 Msun. The spectra of the two most evolved galaxies imply ages of 1.3-1.4 Gyr and stellar masses of 4*10^11 Msun. The large range of properties seen in these galaxies strengthens our previous much more uncertain results from broadband photometry. Larger samples are required to determine the relative frequency of dusty starbursts and (nearly) passively evolving galaxies at z~2.5.
description: Accepted for publication in the Astrophysical Journal. 12 pages, 6 figures
The UV Properties of SDSS Selected Quasars
Creators: name: Trammell, George B.
name: Berk, Daniel E. Vanden
name: Schneider, Donald P.
name: Richards, Gordon T.
name: Hall, Patrick B.
name: Anderson, Scott F.
name: Brinkmann, J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present an analysis of the broadband UV/optical properties of z<3.4 quasars matched in the Galaxy Evolution Explorer (GALEX) General Data Release 1 (GR1) and the Sloan Digital Sky Survey Data Release 3 (SDSS DR3). Of the 6371 DR3 quasars covered by 204 GR1 tiles, 5380 have near-UV detections, while 3034 have both near-UV and far-UV detections using a matching radius of 7". Most of the DR3 sample quasars are detected in the near-UV until z~1.7, with the near-UV detection fraction dropping to ~50% by z~2. Statistical tests performed on the distributions of non-detections indicate that the optically-selected quasars missed in the UV tend to be optically faint or at high redshift. The GALEX positions are shown to be consistent with the SDSS astrometry to within an rms scatter of 0.6-0.7" in each coordinate, and empirically determined photometric errors from multi-epoch GALEX observations significantly exceed the Poissonian errors quoted in the GR1 object catalogs. The UV-detected quasars are well separated from stars in UV/optical color-color space, with the relative colors suggesting a marginally detected population of reddened objects due to line of sight absorption or due to dust associated with the quasar. The resulting rest-frame spectral energy distributions (SEDs) cover ~350-9000A, where the overall median SED peaks near the Ly-a emission line, as found in other UV quasar studies. The large sample size allows us to construct median SEDs in small bins of redshift and luminosity, and we find the median SED becomes harder at UV wavelengths for quasars with lower continuum luminosity. Tables containing the results of the matching and the overall median SED are available in the electronic edition of the journal.
description: 46 pages, 19 figures (13 color), 5 tables, AJ accepted, higher resolution accepted version available via ftp://ftp.astro.psu.edu/pub/trammell/GALEX/astroph
Μνήμη, αίσθηση και αγιότητα στο Άξιον Εστί του Οδ. Ελύτη:
Creators: name: Ρούσκα, Βασιλική Αθανασίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2014
Subjects: Άξιον Εστί
Θεολογία
Ελύτης
Axion Esti
Theology
Elytis

description: Η μεταπτυχιακή διπλωματική εργασία με τίτλο: «Μνήμη, αίσθηση και αγιότητα στο Άξιον Εστί του Οδ. Ελύτη» είναι μια προσπάθεια σύνθεσης και σύνδεσης της Θεολογίας με την Τέχνη καθώς και η ανάδειξη της διαχρονικότητας ενός έργου όπως είναι το Άξιον Εστί. Το Άξιον Εστί του Οδυσσέα Ελύτη είναι ένα από τα σημαντικότερα έργα του νομπελίστα Έλληνα ποιητή αλλά και ένα από τα μεγαλύτερα έργα πολιτισμού και μνήμης στη συνείδηση του ελληνικού λαού και όχι μόνο. Το έργο πρώτα απ’ όλα περιλαμβάνει ιστορικά στοιχεία, βιβλικά στοιχεία, θεολογικές αναφορές που γίνονται αφορμές για θεολογική ανάλυση, στοιχεία από την ορθόδοξη παράδοση, στοιχεία από την ελληνική παράδοση, το ελληνικό τοπίο, την ιθαγένεια και τον χρόνο (νυν-αιέν). Τη μνήμη διαδέχεται η αίσθηση η οποία δεν μπορεί να νοηθεί παρά σε αριθμό πληθυντικό. Οι αισθήσεις εμφανίζονται είτε ως ασκημένες αισθήσεις (Ελύτης) είτε ως γεγυμνασμένα αισθητήρια (Θεολογία), διαλέγονται με καθετί το αισθησιακό, με τη Δημιουργία και το κάλλος, με την ελευθερία και τα θεματικά ζεύγη πτώση-θάνατος, αμαρτία-παράδεισος για να καταλήξουν-τελικά- στον εξαγιασμό των αισθήσεων. Η αγιότητα επισκοπείται πρώτα υπό το χριστιανικό πρίσμα κι έπειτα από το ελυτικό. Με αφορμή τα αγιολογικά πρότυπα που απαντώνται σε όλη την έκταση του Άξιον Εστί (Παναγία, Χριστός, Άγιοι Κήρυκος και Ιουλίτα, νέοι άγιοι) γίνεται περαιτέρω ανάδειξη και ανάλυσή τους.
description: The MSc thesis entitled: "Memory, feel and holiness in the AxionEsti of Od. Elytis" is an effort to synthesize and connect Theology with Art and the promotion of the timelessness of a poetry such as the AxionEsti. The AxionEsti of Odysseus Elytis is one of the most important works of the Greek poet Nobel laureate and one of the greatest works of culture and memory in the consciousness of the Greek people and not only. The poem is first of all include historical data, biblical data, theological references made pretexts for theological analysis, data from the Orthodox tradition, elements of the Greek tradition, the Greek landscape, the nationality and time (now-always). Memory follows feeling which can be understood only in the plural. The senses appear either as practiced senses (Elytis) or as gegymnasmena sensors (Theology), in dialogue with everything sensual, the Creation and the beauty, freedom and thematic pairs such as fall-death, sin-paradise to come-finally - the sanctification of the senses. Holiness reviewed first in the Christian perspective, then from Elytis. On the occasion of the hagiographical models found throughout the AxionEsti (Virgin, Christ, Saints Kirykos and Juliti, new saints) beocomes further promotion and analysis.
Aging of the Nonlinear Optical Susceptibility of colloidal solutions
Creators: name: Ghofraniha, Neda
name: Conti, Claudio
name: Ruocco, Giancarlo
Publisher: name: arXiv
Year: 2006
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Pattern Formation and Solitons (nlin.PS)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Using Z-scan and dynamic light scattering measurements we investigate the nonlinear optics response of a colloidal solution undergoing dynamics slowing down with age. We study the high optical nonlinearity of an organic dye (Rhodamine B) dispersed in a water-clay (Laponite) solution, at different clay concentrations (2.0 wt% - 2.6 wt%), experiencing the gelation process. We determine the clay platelets self diffusion coefficient and, by its comparison with the structural relaxation time, we conclude that the gelation process proceeds through the structuring of interconnecting clay platelets network rather than through clusters growth and aggregation.
description: 4 figures, 4 pages
From imperialism to internationalism in British Columbia education and society, 1900 to 1939
Creators: name: Nelles, Wayne Charles
Publisher: name: University of British Columbia
Year: 2009

description: This study argues for a transition from imperialism to internationalism in British Columbia educational thought, policy and practice from 1900 to 1939. Three contrasting and complementary internationalist orientations were dominant in British Columbia during that period. Some educators embraced an altruistic “socially transformative internationalism” built on social gospel, pacifist, social reform, cooperative and progressivist notions. This contrasted with a self-interested “competitive advantage internationalism,” more explicitly economic, capitalist and entrepreneurial. A third type was instrumental and practical, using international comparisons and borrowing to support or help explain the other two. The thesis pays special attention to province-wide developments both in government and out. These include the work of the British Columbia Teachers’ Federation (BCTF), of several voluntary organizations, and provincial Department of Education policy and programme innovations. Examples include the rise, demise, and revival of cadet training, technical education, Department curriculum policy, and the work of the Overseas Education League, the National Council on Education, the Junior Red Cross, the World Goodwill Society of British Columbia, the Vancouver Board of Trade, and the League of Nations Society in Canada. A diverse array of BCTF leaders, parents, teachers, voluntary organizations, students, educational policy makers and bureaucrats, editorialists, the general public, and the provincial government supported international education and internationalist outlooks. The argument is supported chiefly by organizational and government documents, by editorials, letters, articles, commentaries, conference reports, and speeches in The B.C. Teacher, by Department of Education and sundry other reports, by League of Nations materials, and by newspapers and other publications. Distinctive imperially-minded educational ideas and practices prevailed in British Columbia from about 1900 to the mid-1920s, whereas explicitly internationalist education notions and practices complemented or overshadowed imperial education from about 1919 to 1939. The transition from imperialism to internationalism in British Columbia education and society coincided with Canada’s industrialization in an interdependent global economy, and its maturation into an independent self governing nation within the Commonwealth and League of Nations.
Υλοποίηση αλγορίθμων επεξεργασίας πινάκων πραγματικών ρητών συναρτήσεων μέσω της συμβολικής γλώσσας προγραμματισμού Mathematica:
Creators: name: Τσαλίκης, Σωτήριος Χρήστου
Publisher: name: Aristotle University of Thessaloniki
Year: 2014
Subjects: Πραγματικός πολυωνυμικός πίνακας
Πίνακας πραγματικών ρητών συναρτήσεων
Mathematica
Real polynomial matrix
Real rational matrix

description: Η αλγεβρική δομή και οι αλγεβρικές ιδιότητες των πινάκων πραγματικών ρητών συναρτήσεων και διανυσματικών χώρων πραγματικών ρητών συναρτήσεων καθώς και οι σχέσεις τους με την state-space θεωρία πραγμάτωσης των πινάκων κανονικών πραγματικών ρητών συναρτήσεων παίζουν βασικό ρόλο για την μελέτη της θεωρίας των πολυμεταβλητών συστημάτων. Έτσι, η υλοποίηση αλγορίθμων επεξεργασίας πινάκων πραγματικών ρητών συναρτήσεων μέσω κάποιας ανώτερης γλώσσας προγραμματισμού , όπως η Mathematica, κρίνεται αναγκαία και χρήσιμη τόσο για κάποιον αρχάριο όσο και για έναν έμπειρο ερευνητή. Στα πρώτα τέσσερα κεφάλαια αναπτύσσεται η απαραίτητη θεωρία που σχετίζεται με την υλοποίηση των προγραμμάτων, ενώ στο πέμπτο κεφάλαιο γίνεται μία παρουσίαση για την χρήση των προγραμμάτων αυτών. Αναλυτικότερα, το πρώτο κεφάλαιο αναφέρεται στον έλεγχο και την αναγωγή ενός πραγματικού πολυωνυμικού πίνακα σε κανονικό ως προς τις γραμμές, το δεύτερο κεφάλαιο στην έννοια των αριστερών μέγιστων κοινών διαιρετών δύο πραγματικών πολυωνυμικών πινάκων, το τρίτο κεφάλαιο στη θεωρία πραγμάτωσης για πίνακες κανονικών πραγματικών ρητών συναρτήσεων και το τέταρτο κεφάλαιο στην ελέγξιμη και παρατηρήσιμη πραγμάτωση. Τέλος, το πέμπτο κεφάλαιο αναφέρεται στους κώδικες υλοποίησης αλγορίθμων επεξεργασίας πινάκων πραγματικών ρητών συναρτήσεων, μέσω της συμβολικής γλώσσας προγραμματισμού Mathematica, καθώς και χρήσιμες πληροφορίες για την χρήση τους.
description: Algebraic structure and algebraic properties of real rational matrices and real rational vector spaces as well as their relation to the state-space realization theory of real proper rational matrices are of great significance regarding the study of multivariable systems theory. Consequently, generating algorithms in order to process real rational matrices using an advanced program language, such as Mathematica, is necessary and useful and refers to both amateurs and experienced researchers. The first four Chapters are about the necessary theory related creating these programs and the final one is about how to use them properly. Utterly the first Chapter deals with verification and reduction of a real polynomial matrix in row proper form, the second one with the meaning of greatest common left divisors of two real polynomial matrices, the third one is about realization theory of real proper rational matrices and the fourth describes controllable and observable realization. The final Chapter presents the basic structure of the programs processing real rational polynomial matrices via symbolic program language Mathematica as well as useful information on how to use them.
The Purcell question: why do all viscosities stop at the same place?
Creators: name: Trachenko, K.
name: Brazhkin, V.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: In 1977, Purcell asked why liquid viscosities all stop at the same place? Liquids are hard to understand, yet today we can answer the Purcell question in terms of fundamental physical constants fixing viscosity minima. With the Planck constant setting the minimal viscosity, water and life appear to be well attuned to the degree of quantumness of the physical world.
Δημιουργία Ηλεκτρονικής Βάσης Δεδομένων (ΗΒΔ) καταγραφής γεωτρήσεων ύδρευσης: Πιλοτική εφαρμογή στη ΛΑΠ Νέστου.
Creators: name: Φυτιλής, Κωνσταντίνος Στέργιου
Publisher: name: Aristotle University of Thessaloniki
Year: 2014
Subjects: Οδηγία 2000/60/ΕΚ.
Οδηγία 98/83/ΕΚ.
Ηλεκτρονική Βάση Δεδομένων
Directive 2000/60/EC.
Directive 98/83/EC.
Electronic Database

description: Οι δύο μεγαλύτερες καινοτομίες της Οδηγίας 2000/60/ΕΚ είναι ότι πλέον εξετάζει ένα υδάτινο σύστημα σε επίπεδο λεκάνης απορροής και το γεγονός ότι για την εκτίμηση της οικολογικής ποιότητας των υδάτων εκτός από τις φύσικο-χημικές και υδρομορφολογικές παραμέτρους εξετάζονται και βιολογικές παράμετροι. Κύριος στόχος της παρούσας διατριβής είναι η προσπάθεια δημιουργίας ηλεκτρονικής βάσης δεδομένων (ΗΒΔ) καταγραφής γεωτρήσεων για την κάλυψη υδρευτικών αναγκών στο πλαίσιο της Οδηγίας 2000/60/ΕΚ και πιλοτική εφαρμογή στην ΠΛΑΠ Νέστου. Αρχικά έγινε ανάλυση-συσχέτιση των νομοθεσιών που αφορούν το πόσιμο νερό. Στη συνέχεια αξιολογήθηκε η λειτουργία και ο έλεγχος πηγών υδροδότητσης καθώς και οι κατευθυντήριες γραμμές καταγραφής θέσεων υδροδότησης. Προς ολοκλήρωση της εργασίας αναπτύχθηκαν τα πρότυπα παρακολούθησης και αξιολόγησης υδάτων σε αστικές περιοχές ενώ αναπτύχθηκαν και οι κατευθυντήριες γραμμές για την ορθολογική χρήση υδάτων στον αστικό ιστό.
description: The two major innovations of the Directive 2000/60/EC is firstly the fact that examines the water body at a river basin level and secondly the fact that for the assessment of the ecological water quality, apart from the physico-chemical and hydromorphological parameters, some biological parameters are also examined. The aim of this research is to create an electronic database recording drilling for water needs and implementing at Nestos basin. Initially, analysis-correlation of the laws concerning drinking water. Subsequently evaluated the functioning and control sources ydrodotitsis and the recording positions water guidelines. To complete the work developed in the water monitoring and evaluation standards in urban areas were developed and guidelines for the rational use of water in the urban fabric.
Η Χριστολογία στο έργο του Αμφιλοχίου Ικονίου:
Creators: name: Δερματίδου, Κυριακή Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2014
Subjects: Αμφιλόχιος Ικονίου
Χριστολογία
Καππαδόκες Πατέρες
Amphilochios Iconiou
Christology
Cappadocian Fathers

description: Στην παρούσα μεταπτυχιακή διατριβή, παρουσιάζεται η διδασκαλία για τον Χριστό (Χριστολογία), όπως προκύπτει μέσα από τα διαθέσιμα έργα του Αμφιλοχίου επισκόπου Ικονίου. Ο άγιος Αμφιλόχιος έζησε τον 4ο αιώνα, κατά τη διάρκεια του οποίου υπήρξε έντονη η παρουσία αιρέσεων, με σημαντικότερη αυτή του Αρειανισμού. Με αφορμή τις αιρέσεις της εποχής, ο επίσκοπος συνέταξε το μεγαλύτερο μέρος του συγγραφικού του έργου, για να αντικρούσει τις διδασκαλίες αυτών. Η διδασκαλία του, επηρεάζεται από τους σύγχρονους με τον ίδιο, Καππαδόκες Πατέρες, τους Μέγα Βασίλειο, Γρηγόριο Θεολόγο και Γρηγόριο Νύσσης. Ο άγιος Αμφιλόχιος επεδίωξε να διασφαλίσει την θεολογία και πίστη της Εκκλησίας έναντι των αιρέσεων, ακολουθώντας την πορεία των προγενεστέρων και συγχρόνων του Πατέρων, αλλά και το δόγμα των Οικουμενικών Συνόδων.
description: At the current thesis presents the teaching of Christ (Christology) as this is shown through the available works of Amphilochious, bishop of Iconium. Saint Amphilochios lived during the 4th century, in which there was strong presence of heresies. The most important of them was Arianism. The bishop wrote most of his writings in order to refuse these contemporary teachings. His teaching is influenced by the Cappadocians Fathers: Basil the Great, Gregory the Theologian and Gregory of Nyssa. Saint Amphilochios strived to secure the theology and faith of the Church against heresies following the tradition of the earlier Fathers, his contemporaries and the doctrine of the Ecumenical Councils.
ALMA Observations of HCO+ and HCN Emission in a massive star forming region N55 of the Large Magellanic Cloud
Creators: name: Nayana, A. J
name: Naslim, N.
name: Onishi, T.
name: Kemper, F.
name: Tokuda, K.
name: Madden, S. C.
name: Morata, O.
name: Nasri, S.
name: Galametz, M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present the results of high spatial resolution HCO$^{+}$($1-0$) and HCN($1-0$) observations of N55 south region (N55-S) in the Large Magellanic Cloud (LMC), obtained with the Atacama Large Millimeter/submillimeter Array (ALMA). N55-S is a relatively less extreme star-forming region of the LMC characterized by a low radiation field. We carried out a detailed analysis of the molecular emission to investigate the relation between dense molecular clumps and star formation in the quiescent environment of N55-S. We detect ten molecular clumps with significant HCO$^{+}(1-0)$ emission and eight with significant HCN($1-0$) emission, and estimate the molecular clump masses by virial and local thermodynamic equilibrium analysis. All identified young stellar objects (YSOs) in the N55-S are found to be near the HCO$^{+}$ and HCN emission peaks showing the association of these clumps with recent star formation activity. The molecular clumps that have associated YSOs show relatively larger linewidths and masses than those without YSOs. We compare the clump properties of the N55-S with those of other giant molecular clouds (GMCs) in the LMC and find that N55-S clumps possess similar size but relatively lower linewidth and larger HCN/HCO$^{+}$(1$-$0) flux ratio. These results can be attributed to the low radiation field in N55-S resulted by relatively low star formation activity compared to other active star-forming regions like 30Doradus-10 and N159. The dense gas fraction of N55-S is $\sim$ 0.025, lower compared to other GMCs of the LMC supporting the low star formation efficiency of this region.
description: Accepted for publication in ApJ, 13 pages, 4 figures
New Lepton Family Symmetry and Neutrino Tribimaximal Mixing
Creators: name: Ma, Ernest
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The newly proposed finite symmetry Sigma(81) is applied to the problem of neutrino tribimaximal mixing. The result is more satisfactory than those of previous models based on A_4 in that the use of auxiliary symmetries (or mechanisms) may be avoided. Deviations from the tribimaximal pattern are expected, but because of its basic structure, only tan^2 (theta_12) may differ significantly from 0.5 (say 0.45) with sin^2 (2 theta_23) remaining very close to one, and theta_13 very nearly zero.
description: 8 pages, no figure
Spectrum and Dynamics of the BCS-BEC crossover from a few-body perspective
Creators: name: von Stecher, Javier
name: Greene, Chris H.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Nuclear Theory (nucl-th)
subject: Atomic Physics (physics.atom-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The spectrum of two spin-up and two spin-down fermions in a trap is calculated using a correlated gaussian basis throughout the range of the BCS-BEC crossover. These accurate calculations provide a few-body solution to the crossover problem. This solution is used to study the time-evolution of the system as the scattering length is changed, mimicking experiments with Fermi gases near Fano-Feshbach resonances. The structure of avoiding crossings in the spectrum allow us to understand the dynamics of the system as a sequence of Landau-Zener transitions. Finally, we propose a ramping scheme to study atom-molecule coherence.
description: 4 pages, final version to appear in PRL
Sharp edge, vertex, and mixed Cheeger type inequalities for finite Markov kernels
Creators: name: Montenegro, Ravi
Publisher: name: arXiv
Year: 2006
Subjects: subject: Probability (math.PR)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 60J10

description: We show how the evolving set methodology of Morris and Peres can be used to show Cheeger inequalities for bounding the spectral gap of a finite Markov kernel. This leads to sharp versions of several previous Cheeger inequalities, including ones involving edge-expansion, vertex-expansion, and mixtures of both. A bound on the smallest eigenvalue also follows.
description: v1: original version (>20 pages) v2: v1 was far too verbose; this pares it to under 10 pages
Γεωμορφολογική μελέτη της υδρολογικής λεκάνης του ρέματος Ξηριά και των λιμνών Ζερέλια με τη χρήση Γεωγραφικών Συστημάτων Πληροφοριών (G.I.S) και δορυφορικών δεδομένων.:
Creators: name: Γαϊτανόπουλος, Αλέξανδρος Απόστολου
Publisher: name: Aristotle University of Thessaloniki
Year: 2014
Subjects: Ζερέλια
Ξηριά
Γεωμορφολογία
Zerelia
Xirias
Geomorphology

description: Αντικείμενο της παρούσας διατριβής είναι να μελετηθεί η γεωμορφολογία που παρουσιάζει το ανάγλυφο στη λεκάνη του ρέματος Ξηριά, καθώς και να χαρτογραφηθούν οι παρακείμενες στη πόλη του Αλμυρού δίδυμες λίμνες Ζερέλια. H περιγραφή των τεκτονικών δομών της ευρύτερης περιοχής καθώς και μορφολογικές παρατηρήσεις κατά μήκος της κοίτης του Ξηριά. και το υδρογραφικό δίκτυο της λεκάνης, Στην ευρύτερη περιοχή διεξήχθη και τηλεπισκοπική παρατήρηση, όπου μέσω δορυφορικών εικόνων υπολογίστηκαν δείκτες βλάστησης μέσω των οποίων ερμηνεύτηκαν οι μορφολογικές συνθήκες του Τα δεδομένα των μετρήσεων, μαζί με τα ψηφιοποιημένα στοιχεία του γύρω ανάγλυφου εισήχθησαν σε περιβάλλον Γεωγραφικών Συστημάτων Πληροφοριών (GIS) όπου δημιουργήθηκαν ψηφιακά μοντέλα εδάφους για τη περιοχή των λιμνών.
description: The aim of this post-graduate thesis is the study of the geomorphology presenting the terrain in the basin of the stream Xiria and mapping the adjacent to the city Almyros twin lakes Zerelia as well.During the study of morphological terrain, there were evaluated the altitude characteristics, the distribution of slopes and the hypsometric integralsfor the drainage basin. The description of the tectonic structures of the wider region in conjunction with the morphological observations along the river bed of Xiria was preceded. analysis. Moreover, maps of orientation, slopes and shaded relief were produced resulting in the meticulous study of the landscapeand the drainage networ
Angular Momentum of a Brane-world Model
Creators: name: Jia, Bei
name: Lee, Xi-Guo
name: Zhang, Peng-Ming
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this paper we discuss the properties of the general covariant angular momentum of a five-dimensional brane-world model. Through calculating the total angular momentum of this model, we are able to analyze the properties of the total angular momentum in the inflationary RS model. We show that the space-like components of the total angular momentum of are all zero while the others are non-zero, which agrees with the results from ordinary RS model.
description: 8 pages; accepted by Chinese Physics C
Denoising Click-evoked Otoacoustic Emission Signals by Optimal Shrinkage
Creators: name: Liu, Tzu-Chi
name: Liu, Yi-Wen
name: Wu, Hau-Tieng
Publisher: name: arXiv
Year: 2020
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Click-evoked otoacoustic emissions (CEOAEs) are clinically used as an objective way to infer whether cochlear functions are normal. However, because the sound pressure level of CEOAEs is typically much lower than the background noise, it usually takes hundreds, if not thousands of repetitions to estimate the signal with sufficient accuracy. In this paper, we propose to improve the signal-to-noise ratio (SNR) of CEOAE signals within limited measurement time by optimal shrinkage (OS) in two different settings: the covariance-based OS (cOS) and the singular value decomposition (SVD)-based OS (sOS). By simulation and analyzing human CEOAE data, the cOS consistently reduced the noise and enhanced the SNR by 1 to 2 dB from a baseline method (BM) that is based on calculating the median. The sOS achieved an SNR enhancement of 2 to 3 dB in simulation, and demonstrated capability to enhance the SNR in real recordings when the SNR achieved by the BM was below 0 dB. An appealing property of OS is that it produces an estimate of every individual column of the signal matrix. This property makes it possible to investigate CEOAE dynamics across a longer period of time when the cochlear conditions are not strictly stationary.
Antibunched photon-pair source based on photon blockade effect in a nondegenerate optical parametric oscillator
Creators: name: Ren, Yi
name: Duan, Shouhui
name: Xie, Wenzhi
name: Shao, Yongkang
name: Duan, Zhenglu
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Nonclassical light sources, such as correlated photon-pairs, play an important role in quantum optics and quantum information processing systems. This study proposes a process to generate antibunched photon-pairs in a nondegenerate optical parametric oscillator. It is found that when the parameters of the system satisfy certain conditions, the generated photons in subharmonic modes exhibit a strong antibunching behavior and are strongly correlated with one another. In particular, the average photon-pair number is resonantly enhanced. It is also observed that the conventional photon blockade contributes to this phenomenon. In addition, it is interesting to note that fundamental mode photons can blockade the subharmonic mode photons. We refer to this phenomenon as a heterogeneous photon blockade.
Συνθετικές προσεγγίσεις του καϊνικού οξέος και ενός αναστολέα των SGLT2 πρωτεϊνών.:
Creators: name: Τριαντακωνσταντή, Βιργινία Βασιλείου
Publisher: name: Aristotle University of Thessaloniki
Year: 2014
Subjects: Καϊνικο όξυ
SGLT2 προτεΐνες
Negishi σύζευξη
kainic acid
SGLT2 protein
Negishi coupling

description: Η παρούσα διπλωματική εργασία αποτελείται από δύο κύρια μέρη. Στο πρώτο μέρος της εργασίας περιγράφεται η προσπάθεια σύνθεσης του καϊνικού οξέος. Κρίσιμο στάδιο στην συνθετική πορεία του καϊνικού οξέος ήταν η στερεοεκλεκτική προσθήκη Michael του ενολικού ανιόντος του νιτρο-οξικού αιθυλεστέρα στο ακετονίδιο του (d/l)-4,5-διϋδροξυπεντ-2-ενοϊκού μεθυλεστέρα. Η προσθήκη όπως ήταν απολύτως στερεοεκλεκτική και με τον τρόπο αυτό σχηματίσθηκε ο βασικός ανθρακικός σκελετός του καϊνικού οξέος. Από αυτό το προϊόν προσθήκης αναμέναμε να οδηγηθούμε με κατάλληλους μετασχηματισμούς σε γνωστό ενδιάμεσο, το οποίο είχε χρησιμοποιηθεί στο παρελθόν για να συντεθεί το καϊνικό οξύ. Λόγω, όμως, διαφόρων δυσκολιών που προέκυψαν δεν μπορέσαμε να επιτύχουμε τον αρχικό μας στόχο. Στο δεύτερο μέρος της εργασίας στόχος ήταν η σύνθεση ενός μοντέλου που θα μας οδηγούσε στην σύνθεση ενός αναστολέα των πρωτεϊνών SGLT2, ο οποίος βρίσκεται σε κλινικές δοκιμές για την χρήση του ως αντι-διαβητικό φάρμακο. Η σύνθεση του μοντέλου επιτεύχθηκε με επιτυχία και προχωρήσαμε και στην προσπάθεια σύνθεσης του αναστολέα SGLT2. Η έλλειψη όμως χρόνου δεν επέτρεψε την ολοκλήρωση της σύνθεσης.
description: This thesis consists of two main parts. In the first part of the work described efforts for the composition of kainic acid. A critical step in the synthetic procedure of kainic acid was stereoselective Michael addition of the enolate anion of the nitro-acetate in the (d/l)-4,5-diydroxypent-2-enoate. The addition was as strictly stereoselective and thereby formed the basic carbon skeleton of kainic acid. From this adduct is expected to be led by suitable transformations known intermediate, which was previously used to synthesize kainic acid. However, due to various difficulties that arose were not able to achieve our initial target. In the second part of this study aim was to synthesize a model that would lead us to the synthesis of a protein inhibitor of SGLT2, which is in clinical trials for use as an anti-diabetic drug. The composition of the model was achieved successfully proceeded, and in the inhibitor composition attempt SGLT2. However, the lack of time prevented the completion of the synthesis.
Andreev reflection in bilayer graphene
Creators: name: Ludwig, T.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We consider the conductance of a normal-superconductor junction in bilayer graphene in the framework of the Dirac-Bogoliubov-De-Gennes equation. A remarkable suppression of the conductance at voltages just below the superconducting gap is found. This can be understood in terms of the spinor structures of the electron and hole excitations, in particular the reflected valence band hole being orthogonal to the incoming electron at normal incidence. Minor changes in response to referee reports, references updated.
description: 9 pages, 8 figures
Prototyping, Integration and Assembly of the CMS Phase-2 Outer Tracker Endcap
Creators: name: Guthoff, Moritz
name: Reichelt, Oskar
Publisher: name: Deutsches Elektronen-Synchrotron, DESY, Hamburg
Year: 2019

description: Forum on Tracking Detector Mechanics 2019, FTDM2019, Ithaca, NY, United States, 17 Jun 2019 - 20 Jun 2019
description: For the High-Luminosity LHC, CMS will install a completely new silicon tracker. Due to the anticipated increase in instantaneous luminosity by a factor of five compared to the LHC design value, the granularity will be significantly increased in order to cope with the higher track density. The future tracker will consist of two barrel parts and two endcaps (TEDD), one on each side. One TEDD is made of five double-disks, each equipped with detector modules on all four faces to ensure a complete coverage. The backbone of the mechanical structure of the end caps are highly integrated half-disks (Dees). After the Dees are equipped with modules and tested, they are combined to form disks, double-disks and finally the TEDD. With the Dees being lightweight but large and fragile objects, they need to be supported during assembly and integration. A large semi circular arc frame is being designed to support the detector parts during all necessary integration steps, which includes transport, thermal cycling and relative positioning to a high precision. For the integration, tooling to precisely align the different disks is needed before installing the connecting skeleton. Dedicated assembly stations are being designed to allow sub mm precision alignment. The contribution will give an introduction into the design of the TEDD and the half-disks, and discuss the plan for an assembly sequence. The designs and prototypes for toolings to build double-disks and the final TEDD will be presented.