cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Λειτουργική αναδιαμόρφωση περιαστικών οδών μέσω της υλοποίησης μέτρων διαχείρισης της ταχύτητας. Η περίπτωση του οδικού τμήματος Θεσσαλονίκης - Περαίας
Creators: name: Παπουτσής, Κωνσταντίνος Νικολάου
Publisher: name: Aristotle University of Thessaloniki
Year: 2010
Subjects: Ταχύτητα
Οδός
Λειτουργικός
Speed
Road
Functional

description: Η παρούσα εργασία φέρει τον τίτλο ‘Λειτουργική αναδιαμόρφωση περιαστικών οδών μέσω της υλοποίησης μέτρων διαχείρισης της ταχύτητας. Η περίπτωση του oδικού τμήματος Θεσσαλονίκης – Περαίας’. Η μελέτη έχει ως αντικείμενο την περιγραφή των οδικών χαρακτηριστικών του οδικού τμήματος και την περαιτέρω ανάλυση του προφίλ ταχύτητας της οδού. Η μεθοδολογία που ακολουθήθηκε ήταν κυρίως βιβλιογραφική ανασκόπηση αλλά και μετρήσεις καταγραφής ταχυτήτων επί της οδού. Στόχοι της εργασίας ήταν αφ’ ενός η διατύπωση δέσμης προτάσεων για την υλοποίηση μέτρων περιορισμού της ταχύτητας των οχημάτων, αφ’ ετέρου, μέσα από αυτό, η συνολικότερη αναμόρφωση των λειτουργιών και των χαρακτηριστικών του παρόντος οδικού δικτύου. Αφού εντοπίσθηκε η σχέση που έχει η ταχύτητα με την οδική ασφάλεια και συνεπώς τα τροχαία ατυχήματα, μέσω βιβλιογραφίας καταρτίσθηκε ένα λιτό, θεωρητικό υπόβαθρο το οποίο υπήρξε η βάση για την μετέπειτα παρουσίαση των προτάσεων. Έγινε μια περιγραφική απεικόνιση της οδού στα βασικότερα χαρακτηριστικά της (κόμβοι, ταχύτητες, φόρτοι, πεζοί, κ.α.) και σε συνδυασμό με όλα τα παραπάνω προτάθηκε μια σειρά μέτρων μόνιμου χαρακτήρα που εστίαζε στα ψυχολογικά αίτια της ανάπτυξης υψηλών ταχυτήτων από τους οδηγούς στο υπό εξέταση οδικό κομμάτι. Στο τέλος, έγινε η εξαγωγή κάποιων γενικών συμπερασμάτων τόσο όσον αφορά τις περιπτώσεις σχεδιασμού πολιτικής διαχείρισης της ταχύτητας γενικότερα, αλλά και πιο συγκεκριμένα, στην περίπτωση της περιοχής μελέτης μας.
description: This diploma thesis is titled “Functional remodeling of suburban roads through the implementation of measures of speed management. The case study of the Thessaloniki – Peraia’s road part”. The thesis is dealing with the characteristics of the above road part and establishes a deeper analysis of the speed profile of the road. The method that was followed included a bibliographic review as well as measuring vehicles’ speed on the road. The thesis aims were on the one hand the formulation of a packet of proposals about the implementation of speed management measures, and on the other hand, through this, the overall reformation of functions and characteristics of the study area. After relating speeding to road safety and mainly to road accidents, a simple and theoretical background was complied via bibliography which was the base for the proposals formulation. A descriptive depiction of road’s basic characteristics (intersections, speeds, circulation volume, pedestrians’ level of service, etc.) was made and in combination with the all the above a range of measures of permanent character was proposed that focused on the psychological aspects of speeding in our study area. Finally, many overall conclusions were made as far as policies of speed management concerns and also specifically in our case study.
Millimagnitude Photometry for Transiting Extrasolar Planetary Candidates: II. Transits of OGLE-TR-113-b in the Optical and Near-IR
Creators: name: Díaz, Rodrigo F.
name: Ramírez, Sebastián
name: Fernández, José Miguel
name: Gallardo, José
name: Gieren, Wolfgang
name: Ivanov, Valentin D.
name: Mauas, Pablo
name: Minniti, Dante
name: Pietrzynski, Grzegorz
name: Pérez, Felipe
name: Ruíz, María Teresa
name: Udalski, Andrzej
name: Zoccali, Manuela
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present precise V and Ks-band transit photometry for the planetary host star OGLE-TR-113. Using the Ks-band photometry, we confirm the dwarf nature of OGLE-TR-113, and obtain new estimates for its effective temperature, distance and reddening. We employ the V-band photometry to obtain planetary and orbit parameters from the transit fit, a= (0.0232 \pm 0.0038) AU, orbital period P= (1.4324752 \pm 0.0000015) days, i= 86.7 - 90, R_p= (1.09 \pm 0.09) R_J. These values are in excellent agreement with previous works. Assuming a mass M_p= (1.32 \pm 0.19) M_J for the planet we obtain its mean density ρ= (1.26 \pm 0.50) g cm^{-3}, also in agreement with previous works. The transit observed in the Ks-band has a larger scatter and we find its amplitude to be consistent with that in the V-band. In this way, we find an independent confirmation of the planetary nature of OGLE-TR-113b.
description: 26 pages, 10 figures, 1 table. Accepted for publication in the Astrophysical Journal
Decomposing the Internal Faraday Rotation of Black Hole Accretion Flows
Creators: name: Ricarte, Angelo
name: Prather, Ben S.
name: Wong, George N.
name: Narayan, Ramesh
name: Gammie, Charles
name: Johnson, Michael
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Faraday rotation has been seen at millimeter wavelengths in several low luminosity active galactic nuclei, including Event Horizon Telescope (EHT) targets M87* and Sgr A*. The observed rotation measure (RM) probes the density, magnetic field, and temperature of material integrated along the line of sight. To better understand how accretion disc conditions are reflected in the RM, we perform polarized radiative transfer calculations using a set of general relativistic magneto-hydrodynamic (GRMHD) simulations appropriate for M87*. We find that in spatially resolved millimetre wavelength images on event horizon scales, the RM can vary by orders of magnitude and even flip sign. The observational consequences of this spatial structure include significant time-variability, sign-flips, and non-$λ^2$ evolution of the polarization plane. For some models, we find that internal rotation measure can cause significant bandwidth depolarization even across the relatively narrow fractional bandwidths observed by the EHT. We decompose the linearly polarized emission in these models based on their RM and find that emission in front of the mid-plane can exhibit orders of magnitude less Faraday rotation than emission originating from behind the mid-plane or within the photon ring. We confirm that the spatially unresolved (i.e., image integrated) RM is a poor predictor of the accretion rate, with substantial scatter stemming from time variability and inclination effects. Models can be constrained with repeated observations to characterise time variability and the degree of non-$λ^2$ evolution of the polarization plane.
description: Accepted for publication by MNRAS
Apparent giant dielectric constants, dielectric relaxation, and ac-conductivity of hexagonal perovskites La1.2Sr2.7BO7.33 (B = Ru, Ir)
Creators: name: Lunkenheimer, P.
name: Götzfried, T.
name: Fichtl, R.
name: Weber, S.
name: Rudolf, T.
name: Loidl, A.
name: Reller, A.
name: Ebbinghaus, S. G.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We present a thorough dielectric investigation of the hexagonal perovskites La1.2Sr2.7IrO7.33 and La1.2Sr2.7RuO7.33 in a broad frequency and temperature range, supplemented by additional infrared measurements. The occurrence of giant dielectric constants up to 10^5 is revealed to be due to electrode polarization. Aside of dc and ac conductivity contributions, we detect two intrinsic relaxation processes that can be ascribed to ionic hopping between different off-center positions. In both materials we find evidence for charge transport via hopping of localized charge carriers. In the infrared region, three phonon bands are detected, followed by several electronic excitations. In addition, these materials provide further examples for the occurrence of a superlinear power law in the broadband ac conductivity, which recently was proposed to be a universal feature of all disordered matter.
description: 8 pages, 7 figures
Atomistic mechanism of friction force independence on the normal load and other friction laws for dynamic structural superlubricity
Creators: name: Brilliantov, Nikolay V.
name: Tsukanov, Alexey A.
name: Grebenko, Artem K.
name: Nasibulin, Albert G.
name: Ostanin, Igor A.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We explore dynamic structural superlubricity for the case of a relatively large contact area, where the friction force is proportional to the area (exceeding $\sim 100\,nm^2$) experimentally, numerically, and theoretically. We use a setup comprised of two molecular smooth incommensurate surfaces -- graphene-covered tip and substrate. The experiments and MD simulations demonstrate independence of the friction force on the normal load, for a wide range of normal loads and relative surface velocities. We propose an atomistic mechanism of this phenomenon, associated with synchronic out-of-plane surface fluctuations of thermal origin, and confirm it by numerical experiments. Based on this mechanism, we develop a theory for this type of superlubricity and show that friction force increases linearly with increasing temperature and relative velocity, for velocities, larger than a threshold velocity. The MD results are in a fair agreement with predictions of the theory.
description: Accepted to Physical Review Letters on November 14, 2023
Επίδραση της δομής και διάρθρωσης του τοπίου στη βιοποικιλότητα των λιβαδικών οικοσυστημάτων:
Creators: name: Καψάλης, Δημήτριος Γρηγορίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2010
Subjects: Δομή
Διάρθρωση
Βιοποικιλότητα
Structure
Pattern
Biodiversity

description: Σκοπός της παρούσας διατριβής ήταν η εκτίμηση της επίδρασης της δομής και της διάρθρωσης του τοπίου στη βιοποικιλότητα των λιβαδικών οικοσυστημάτων με τη χρήση δεικτών. Ως περιοχή έρευνας επιλέχθηκε το βορειοδυτικό τμήμα της λεκάνης της Μυγδονίας. Η κατανομή στο χώρο των διαφόρων ειδών διάρθρωσης του τοπίου που προέκυψαν από την επεξεργασία της δορυφορικής εικόνας Alos 2008 και οι δείκτες της χωρικής διάρθρωσης του τοπίου υπολογίστηκαν με τη χρήση του πργράμματος Patch Analyst (ανάλυση χωροψηφίδων) του προγράμματος ArcView 3.2a. Η ανάλυση των δεικτών ερμήνευσε το φυσιογραφικό επίπεδο των πέντε Δημοτικών Διαμερισμάτων της περιοχής μελέτης. Από την επεξεργασία των στοιχείων της διάρθρωσης του τοπίου προέκυψε στην περιοχή έρευνας αποτελείται από μικρό ποσοστό αγροτικών τοπίων με καλλιέργειες δενδρωδών ειδών και μεγαλύτερο από χωροψηφίδες σημειακής διάρθρωσης (dot), τους εγκαταλελειμμένους αγρούς. Στις καλλιεργήσιμες εκτάσεις των ορεινών περιοχών μελέτης υπάρχει μεγάλη ποικιλότητα δενδρωδών ειδών ενώ στις πεδινές περιοχές υπάρχει μικρή ποικιλότητα, αυξημένη ανθρώπινη παρέμβαση και μειωμένη ανομοιομορφία των χωροψηφίδων. Με την τιμή του δείκτη της πυκνότητας περιμέτρου (ED) εκφράζεται τη διαχρονική υποβάθμιση της μορφής και της ποιότητας των κρασπεδικών βιοτόπων και την αρνητική επίδραση που ασκούν αυτοί στη βιοποικιλότητα των ειδών που διαβιούν στα τοπία αυτά.
description: This thesis aims to estimate the effect of structure and pattern of landscape in the biodiversity of rangeland ecosystems using indicators. The study area is located in the N.W. part of the basin of Mygdonia. The distribution in the space of various types of structure of landscape that resulted from the treatment of satellite picture Alos 2008 and the indicators of territorial structure of landscape were calculated with the use of program Patch Analyst of the software ArcView 3.2a. The analysis of indicators interpreted the physiographic level of five Municipal Apartments of region of study. From the treatment of elements of structure of landscape it resulted in the region of research it is constituted by small percentage of agriculture landscapes with cultures of arborised types and bigger than dot patches patterns, which are the abandoned fields. In cultivable extents of mountainous regions of study exists big diversity of arborised types while in the flat regions exist small diversity, increased human intervention and decreased unevenness of patches. With the indicator edge density (ED) express the diachronic degradation of form and the quality of biotopes and the negative effect in the biodiversity of species.
Accurate photometry of extended spherically symmetric sources
Creators: name: Anders, P.
name: Gieles, M.
name: de Grijs, R.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a new method to derive reliable photometry of extended spherically symmetric sources from {\it HST} images (WFPC2, ACS/WFC and NICMOS/NIC2 cameras), extending existing studies of point sources and marginally resolved sources. We develop a new approach to accurately determine intrinsic sizes of extended spherically symmetric sources, such as star clusters in galaxies beyond the Local Group (at distances
description: The paper is accepted for publication in A&A, Section 13 (Observational Techniques, published electronically). The published version contains one example table per appendix. A version of the paper containing all tables as well as all data in electronical form are available http://www.astro.physik.uni-goettingen.de/~galev/panders/Sizes_AC/
Writing science with LaTeX
Creators: name: Jansson, Peter
Publisher: name: Stockholm University
Year: 2024
Subjects: classificationCode: 379999
subject: Other earth sciences not elsewhere classified

description: An introduction to authoring with LaTeX for the sciences. The text assumes no prior knowledge of LaTeX. It is intended for students and professionals who wants a brief introduction as a basis for further self-learning. It should be sufficient for writing any document that is based on a template or specific class.v.8: Expanded the siunitx section to better show the capabilities in v.3 of the package. Improved the index to list commands alphabetically.v.7: Added new section on general typographical aspects of layout. Added the packages multirow and titlesec to the list of recommended packages. The text on the siunitx package has been expanded and updated to follow version 4 changes of the package. Expanded section on Zotero to include new features in synchronisation with Overleaf.v.6: Added details on adding an index and appendix. Also added an index to the compendium. Added references to the most recent package documentation on CTAN. Sections concerning Overleaf and Zotero has been updated to reflect current features.v.5: The section on referencing has been partially rewritten and reorganised. Minor corrections throughout the text.v.4: Revisions made to follow developments in Overleaf. Reorganisation in the section of package descriptions. Added a brief chapter on graphics in addition to presenting the graphicx package. General updates of links and typos.v.3: The part on referencing is completely rewritten with notes on Zotero and Overleaf 2 integration included. Many minor typos and errors in v.2 have also been corrected throughout the document.v.2: Added appendix on how to install LaTeX locally on a personal computer. Minor typos in v.1 corrected. Adjusted for Overleaf v2 upgrade.
Implications of CTEQ global analysis for collider observables
Creators: name: Nadolsky, P. M.
name: Lai, H. -L.
name: Cao, Q. -H.
name: Huston, J.
name: Pumplin, J.
name: Stump, D.
name: Tung, W. -K.
name: Yuan, C. -P.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The latest CTEQ6.6 parton distributions, obtained by global analysis of hard scattering data in the framework of general-mass perturbative QCD, are employed to study theoretical predictions and their uncertainties for significant processes at the Fermilab Tevatron and CERN Large Hadron Collider. The previously observed increase in predicted cross sections for the standard-candle W and Z boson production processes in the general-mass scheme (compared to those in the zero-mass scheme) is further investigated and quantified. A novel method to constrain PDF uncertainties in LHC observables, by effectively exploiting PDF-induced correlations with benchmark standard model cross sections, is presented. Using this method, we show that the top-antitop pair cross section can potentially serve as a standard candle observable for the LHC processes dominated by initial-state gluon scattering. Among other benefits, precise measurements of $t\bar{t}$ cross sections would reduce PDF uncertainties in predictions for single-top quark and Higgs boson production in the standard model and minimal supersymmetric standard model.
description: 32 pages, 15 figures; figures with embedded fonts available at http://hep.pa.msu.edu/cteq/public/6.6/pdfs/; extended discussion of small-x strangeness, added references, minor changes in Figs. 2-4 in the revised version
An injectable, self-healing and MMP-inhibiting hyaluronic acid gel via iron coordination
Creators: name: Gao, Ziyu
name: Yang, Xuebin
name: Jones, Elena
name: Bingham, Paul A.
name: Scrimshire, Alex
name: Thornton, Paul D.
name: Tronci, Giuseppe
Publisher: name: arXiv
Year: 2021
Subjects: subject: Tissues and Organs (q-bio.TO)
subject: FOS: Biological sciences

description: Regulating the activity of matrix metalloproteinases (MMPs) is a potential strategy for osteoarthritis (OA) therapy, although delivering this effect in a spatially and temporally localised fashion remains a challenge. Here, we report an injectable and self-healing hydrogel enabling factor-free MMP regulation and biomechanical competence in situ. The hydrogel is realised within one minute upon room temperature coordination between hyaluronic acid (HA) and a cell-friendly iron-glutathione complex in aqueous environment. The resultant gel displayed up to 300% in shear strain and tolerance towards ATDC 5 chondrocytes, in line with the elasticity and biocompatibility requirements for connective tissue application. Significantly enhanced inhibition of MMP-13 activity was achieved after 12 hours in vitro, compared with a commercial HA injection (OSTENIL PLUS). Noteworthy, 24-hour incubation of a clinical synovial fluid sample collected from a late-stage OA patient with the reported hydrogel was still shown to downregulate synovial fluid MMP activity (100.0 +/- 17.6 % --> 81.0 +/- 7.5 %), with at least comparable extent to the case of the OSTENIL PLUS-treated SF group (100.0 +/- 17.6 % --> 92.3 +/- 27.3 %). These results therefore open up new possibilities in the use of HA as both mechanically-competent hydrogel as well as a mediator of MMP regulation for OA therapy.
The "test space and pairing" idea for frames and some generalized characterizations and topological properties of Euclidean continuous frames
Creators: name: Idrissi, Nizar El
name: Kabbaj, Samir
name: Moalige, Brahim
Publisher: name: arXiv
Year: 2023
Subjects: subject: Functional Analysis (math.FA)
subject: General Topology (math.GN)
subject: FOS: Mathematics
subject: 42C15, 54D99

description: We introduce the "test space and pairing" idea for frames and apply it to the $\ell^2$ and $L^2$ spaces. First, we show that for every $J \neq \emptyset$, the notions of a classical $I$-frame with values in $H$ and a $J$-extended classical $I$-frame with values in $H$ are the same. The definition of a $J$-extended classical $I$-frame with values in $H$, $u = (u_i)_{i \in I}$, utilizes the "test space and pairing" idea by replacing the usual "test space" $H$ with $\ell^2(J;H)$ and the usual "pairing" ${P : (v ; (u_i)_{i \in I}) \in H \times \mathcal{F}_I^H \mapsto (\langle v , u_i \rangle)_{i \in I} \in \ell^2(I;\mathbb{F})}$ with ${P^J : ((v_j)_{j \in J} ; (u_i)_{i \in I}) \in \ell^2(J;H) \times \mathcal{F}_I^H \mapsto (\langle v_j , u_i \rangle)_{(i,j) \in I \times J} \in \ell^2(I \times J;\mathbb{F})}$. Secondly, we prove a similar result when the space $\ell^2(J;H)$ is replaced with the space $L^2(Y,ν;H)$ and the frame $u = (u_x)_{x \in X}$ is $(X,μ)$-continuous. Besides, we define the $J$-extended and $(Y,ν)$-extended analysis, synthesis, and frame operators of the frame $u$ and note that they are just natural block-diagonal operators. After that, we generalize quite straightforwardly the well-known characterizations of Euclidean finite frames to the corresponding characterizations of Euclidean continuous frames. One tool that we use in this endeavor is some rewritings of the quotients $N(v ; (u_x)_{x \in X})$ and $N( (v_y)_{y \in Y}) ; (u_x)_{x \in X} )$. Besides, we give a simple sufficient condition for having a frame with values in $\mathbb{F}^2$ and use it to provide an example of a classical $\mathbb{N}^*$-frame with values in $\mathbb{C}^2$. Finally, we generalize some topological properties of the set of frames and Parseval frames from the Euclidean finitely indexed case to the Euclidean continuous one.
description: 12 pages. This work is a corrected version of the previously published journal article which is why it has a different title
Stability for linearized gravity on the Kerr spacetime
Creators: name: Andersson, Lars
name: Bäckdahl, Thomas
name: Blue, Pieter
name: Ma, Siyuan
Publisher: name: arXiv
Year: 2019
Subjects: subject: Analysis of PDEs (math.AP)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 35F40, 35L15, 35Q76, 83C35, 83C57, 83C60

description: In this paper we prove integrated energy and pointwise decay estimates for solutions of the vacuum linearized Einstein equation on the domain of outer communication of the Kerr black hole spacetime. The estimates are valid for the full subextreme range of Kerr black holes, provided integrated energy estimates for the Teukolsky equation hold. For slowly rotating Kerr backgrounds, such estimates are known to hold, due to the work of one of the authors. The results in this paper thus provide the first stability results for linearized gravity on the Kerr background, in the slowly rotating case, and reduce the linearized stability problem for the full subextreme range to proving integrated energy estimates for the Teukolsky equation. This constitutes an essential step towards a proof of the black hole stability conjecture, i.e. the statement that the Kerr family is dynamically stable, one of the central open problems in general relativity.
description: Updated introduction. Added appendix. 111 pages. Corresponds with published version
Deep Learning Framework to Detect Face Masks from Video Footage
Creators: name: Joshi, Aniruddha Srinivas
name: Joshi, Shreyas Srinivas
name: Kanahasabai, Goutham
name: Kapil, Rudraksh
name: Gupta, Savyasachi
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: The use of facial masks in public spaces has become a social obligation since the wake of the COVID-19 global pandemic and the identification of facial masks can be imperative to ensure public safety. Detection of facial masks in video footages is a challenging task primarily due to the fact that the masks themselves behave as occlusions to face detection algorithms due to the absence of facial landmarks in the masked regions. In this work, we propose an approach for detecting facial masks in videos using deep learning. The proposed framework capitalizes on the MTCNN face detection model to identify the faces and their corresponding facial landmarks present in the video frame. These facial images and cues are then processed by a neoteric classifier that utilises the MobileNetV2 architecture as an object detector for identifying masked regions. The proposed framework was tested on a dataset which is a collection of videos capturing the movement of people in public spaces while complying with COVID-19 safety protocols. The proposed methodology demonstrated its effectiveness in detecting facial masks by achieving high precision, recall, and accuracy.
description: Contains 6 pages and 6 figures. Published in 12th CICN 2020
Applications of molecular markers to forest genetics [microform] : genetic diversity, genetic linkage mapping, and gene expression
Creators: name: Glaubitzx, Glaubitz
Publisher: name: University of British Columbia
Year: 2009

description: This thesis is comprised of four studies utilizing molecular genetic markers with coniferous trees. PCR and direct sequencing, RAPD markers, and RFLP markers were used in studies of gene expression (mRNA editing), genetic linkage mapping, and genetic diversity. In the first study, direct sequencing of PCR products was used to demonstrate the existence of RNA editing in the mitochondria of western red cedar (Thuja plicata Donn ex D. Don). This was the first demonstration of this phenomenon in a gymnosperm. The next two studies involved the use of RAPD markers for genetic linkage mapping in conifers. In the first of these, RAPD markers were shown to segregate in a Mendelian fashion among F l progeny of Douglas-fir (Pseudotsuga menziesii [Mirb.] Franco), and hence to be useful as genetic markers in conifers. A testcross mapping strategy was proposed to allow the efficient construction of genetic linkage maps in diploid organisms such as trees using these dominant markers. The feasibility of this strategy was demonstrated in Douglas-fir. This was the first study using RAPD markers in a conifer. An alternative mapping strategy, taking advantage of the availability of haploid megagametophyte tissue in conifers, was explored in the next study. A partial genetic linkage map was constructed for a single white spruce (Picea glauca [Moench] Voss) tree by following the segregation of RAPD markers among a set of megagametophytes obtained from seeds of that tree. It was shown that the disadvantage of the dominance of RAPD markers could be overcome by using this haploid tissue as a DNA source. The approach to genetic linkage mapping first taken in this study is now commonly used by conifer geneticists. The final study was on DNA-level genetic diversity in western red cedar. Previous results with isozyme markers and terpenes had suggested that genetic diversity is relatively low in this species. Single or low copy number nuclear RFLP markers were developed to further explore this question. The resulting estimate of species-wide genetic diversity (expected heterozygosity) closely agreed with those obtained from isozyme studies. This was the first large scale population genetics study in a conifer using single or low copy number nuclear RFLP markers.
On the distance of GRO J1655-40
Creators: name: Foellmi, C.
name: Depagne, E.
name: Dall, T. H.
name: Mirabel, I. F.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We challenge the accepted distance of 3.2 kpc of GRO J1655-40. We present VLT-UVES spectroscopic observations to estimate the absorption toward the source, and determine a maximum distance of GRO J1655-40. We show that the accepted value of 3.2 kpc is taken for granted by many authors. We retrieved in the ESO archive UVES spectra taken in April 2004 when GRO J1655-40 was in quiescence to determine the spectral type of the secondary star. For the first time we build a flux-calibrated mean (UVES) spectrum of GRO J1655-40 and compare its observed flux to that of five nearby stars of similar spectral types. We strengthen our results with the traditional pair method, using published photometric data of the comparison stars. We show that the distance of 3.2 kpc is questionable. We determine a spectral type F6IV for the secondary star. We demonstrate in details that the distance of GRO J1655-40 must be smaller than 1.7 kpc. The runaway black hole GRO J1655-40 could be associated with the open cluster NGC 6242 which is located at 1.0$\pm$0.1 kpc from the Sun. At $D \leq$ 1.7 kpc the jets are not a superluminal, and GRO J1655-40 becomes one of the closest known black holes to the Sun.
description: 9 pages, 6 figures, accepted for publication in Astronomy & Astrophysics. Small correction of distance range values using the photometric method. (re-accepted by A&A)
Writing science with LaTeX
Creators: name: Jansson, Peter
Publisher: name: Stockholm University
Year: 2023
Subjects: classificationCode: 379999
subject: Other earth sciences not elsewhere classified

description: An introduction to authoring with LaTeX for the sciences. The text assumes no prior knowledge of LaTeX. It is intended for students and professionals who wants a brief introduction as a basis for further self-learning. It should be sufficient for writing any document that is based on a template or specific class.v.7: Added new section on general typographical aspects of layout. Added the packages multirow and titlesec to the list of recommended packages. The text on the siunitx package has been expanded and updated to follow version 4 changes of the package. Expanded section on Zotero to include new features in synchronisation with Overleaf. v.6: Added details on adding an index and appendix. Also added an index to the compendium. Added references to the most recent package documentation on CTAN. Sections concerning Overleaf and Zotero has been updated to reflect current features.v.5: The section on referencing has been partially rewritten and reorganised. Minor corrections throughout the text.v.4: Revisions made to follow developments in Overleaf. Reorganisation in the section of package descriptions. Added a brief chapter on graphics in addition to presenting the graphicx package. General updates of links and typos.v.3: The part on referencing is completely rewritten with notes on Zotero and Overleaf 2 integration included. Many minor typos and errors in v.2 have also been corrected throughout the document.v.2: Added appendix on how to install LaTeX locally on a personal computer. Minor typos in v.1 corrected. Adjusted for Overleaf v2 upgrade.
On Secondary Atomization and blockage of surrogate cough droplets in single and multi-layer face masks
Creators: name: Sharma, Shubham
name: Pinto, Roven
name: Saha, Abhishek
name: Chaudhuri, Swetaprovo
name: Basu, Saptarshi
Publisher: name: arXiv
Year: 2020
Subjects: subject: Applied Physics (physics.app-ph)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: By now it is well-understood that the usage of facemasks provides protection from transmission of viral loads through exhalation and inhalation of respiratory droplets. Therefore, during the current Covid-19 pandemic the usage of face masks is strongly recommended by health officials. Although three-layer masks are generally advised for usage, many commonly available or homemade masks contain only single and double layers. In this study, we show through detailed physics based analyses and high speed imaging that high momentum cough droplets on impingement on single- and double-layer masks can lead to significant partial penetration and more importantly atomization into numerous much smaller daughter droplets, thereby increasing the total population of the aerosol, which can remain suspended for a longer time. The possibility of secondary atomization of high momentum cough droplets due to impingement, hydrodynamic focusing and extrusion through the microscale pores in the fibrous network of the mask has not been explored before. However, this unique mode of aerosol generation poses a finite risk of infection as shown in this work. We also demonstrate that in single layer masks close to 70 % of a given droplet volume is atomized and only 30 % is trapped within the fibers. The entrapped volume is close to 90 % for double layer masks which still allows some atomization into smaller droplets. We however found that a triple-layer surgical mask permits negligible penetration and hence should be effective in preventing disease transmission.
description: 8 pages, 4 figures, 1 table
Young Stellar Groups Around Herbig Ae/Be Stars: A Low-Mass YSO Census
Creators: name: Wang, Shiya
name: Looney, Leslie W.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present NIR and MIR observations of eight embedded young stellar groups around Herbig Ae/Be stars (HAEBEs) using archived Spitzer IRAC data and 2MASS data. These young stellar groups are nearby ($\leq$ 1 kpc) and still embedded within their molecular clouds. In order to identify the young stellar objects in our sample, we use the color-color diagram of J - [3.6] vs. Ks - [4.5]. The Spitzer images of our sample show that the groups around HAEBEs, spectral types earlier than B8, are usually associated with bright infrared nebulosity. Within this, there are normally 10 - 50 young stars distributed close to the HAEBEs ($
description: 33 pages, accepted to ApJ, see high resolution figures at http://www.astro.uiuc.edu/~swang9/papers/wang_groups.ps
Intra- and Intermolecular Inhomogeneities in the Course of Glassy Densification of Polyalcohols
Creators: name: Gabriel, Jan Philipp
name: Tress, Martin
name: Kossack, Wilhelm
name: Popp, Ludwig
name: Kremer, Friedrich
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: To test basic assumptions inherent to most theories of molecular liquids and glasses, Infrared spectroscopy is carried out on short polyalcohols at temperatures ranging from far above to far below their glass transition. By analyzing specific vibrations, the thermal expansion of covalent bonds and hydrogen bridges is determined revealing striking differences. A comparison with density verifies the negligibility of \textit{intra}molecular expansion but exposes severe inhomogeneities on \textit{inter}molecular scale. This signals distinct roles in glassy densification and promotes an atomistic understanding.
Ergodic Classical-Quantum Channels: Structure and Coding Theorems
Creators: name: Bjelakovic, Igor
name: Boche, Holger
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: Information Theory (cs.IT)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: We consider ergodic causal classical-quantum channels (cq-channels) which additionally have a decaying input memory. In the first part we develop some structural properties of ergodic cq-channels and provide equivalent conditions for ergodicity. In the second part we prove the coding theorem with weak converse for causal ergodic cq-channels with decaying input memory. Our proof is based on the possibility to introduce joint input-output state for the cq-channels and an application of the Shannon-McMillan theorem for ergodic quantum states. In the last part of the paper it is shown how this result implies coding theorem for the classical capacity of a class of causal ergodic quantum channels.
description: 19 pages, no figures. Final version
The Partition Function in the Wigner-Kirkwood expansion
Creators: name: Matinyan, S. G.
name: Müller, B.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the semiclassical Wigner-Kirkwood (WK) expansion of the partition function $Z(t)$ for arbitrary even homogeneous potentials, starting from the Bloch equation. As is well known, the phase-space kernel of $Z$ satisfies the so-called Uhlenbeck-Beth equation, which depends on the gradients of the potential. We perform a chain of transformations to obtain novel forms of this equation that invite analogies with various physical phenomena and formalisms, such as diffusion processes, the Fokker-Planck equation, and supersymmetric quantum mechanics.
Automated Ring-Diagram Framework for Classifying CP Invariants
Creators: name: Darvishi, Neda
name: Wang, Yining
name: Yu, Jiang-Hao
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this study, we introduce a transformative, automated framework for classifying basis invariants in generic field theories. Utilising a novel ring-diagram methodology accompanied by the well-known Cayley-Hamilton theorem, our approach uniquely enables the identification of basic invariants and their CP-property characterisation. Critically, our framework also unveils previously concealed attributes of established techniques reliant on the Hilbert-Poincaré series and its associated Plethystic logarithm. This paradigm shift has broad implications for the deeper understanding and more accurate classification of CP invariants in generic field theories.
description: 14 pages, 4 figures and 4 tables
LATITUDINAL SPECIES RICHNESS TIES IN WITH LONGITUDINAL SPECIES RICHNESS IN FOREST RED MILLIPEDES (DIPLOPODA: PACHYBOLIDAE)
Creators: name: M. Ian Cooper*
Publisher: name: Zenodo
Year: 2024
Subjects: Centrobolus, latitude, longitude, Red Millipedes, species.

description: Abstract: Latitude was tested for correlation with longitude in red millipedes Centrobolus.  Latitude correlated with longitude in Centrobolus (r=0.73, Z score=5.68, n=40, p=0.00000001). Latitude correlated with species richness (r=-0.97, Z score=-12.54, n=40, p=0). Longitude correlated with species richness (r=0.49, Z score=3.27, n=40, p=0.00054590). Latitudinal species richness correlated with longitudinal species richness in Centrobolus (r=0.3794, r2=0.1439, n=40, p=0.01576).
Προσπάθειες σύνθεσης των φυσικών προϊόντων μαρινεασίνη Α και Β:
Creators: name: Λυμπέρης, Εμμανουήλ Αλέξανδρος
Publisher: name: Aristotle University of Thessaloniki
Year: 2010
Subjects: Φυσικά προϊόντα
Μαρινεοσίνη
Horner-Emmons αντίδραση
Natural products
Marineosine
Horner-emmons reaction

description: Στα πλαίσια αυτής της μεταπτυχιακής εργασίας πραγματοποιήθηκαν προσπάθειες σύνθεσης των φυσικών προιόντων μαρινεοσίνη Α και Β. Στην εισαγωγή γίνεται αναφορά στη βιοσύνθεση της ευρύτερης οικογένειας των προδιγιοσινών και στις δύο προσπάθειες σύνθεσης των μαρινεοσινών από ξένους ερευνητές, καθώς και τα προβλήματα τα οποία αντιμετώπισαν. Εν συνεχεία, δίδονται οι συνθετικές πορείες που ακολουθήθηκαν κατά τη προσπάθεια σύνθεσης της μαρινεοσίνης Α. Παρόλο που τα αποτελέσματα δεν οδήγησαν στη σύνθεση της εν λόγω ένωσης, οι μαρινεοσίνες αποτελούν ένα πολύ ενδιαφέρον και δελεαστικό στόχο στο τομέα της χημείας των φυσικών προϊόντων. Αυτό, άλλωστε, επιβεβαιώνεται και από το πλήθος των ερευνητών που ασχολούνται με αυτή την κατηγορία ενώσεων και είναι βέβαιο πως σύντομα θα υπάρξουν νέα δεδομένα σχετικά με τη σύνθεση και τη βιολογική τους δραστικότητα.
description: This post-graduate project make reference to the synthetical efforts of the natural products marineosine A and B. The introduction refers to the biosynthesis of the wider family prodigiosins, at the efforts of synthesis both marineosins A and B by foreign researchers and at the problems that they encountered. Subsequently, given the synthetic routes followed by the synthetical effort of marineosin A. Although the results have not led to the synthesis of this molecule, the marineosins are a very interesting and tempting target in the field of chemistry of natural products .This is also confirmed by the number of researchers that they involved with this class of compounds and are confident that soon there will be new data about their synthesis and their biological activity.
Identifying Spurious Correlations for Robust Text Classification
Creators: name: Wang, Zhao
name: Culotta, Aron
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: Computation and Language (cs.CL)
subject: Information Retrieval (cs.IR)
subject: FOS: Computer and information sciences

description: The predictions of text classifiers are often driven by spurious correlations -- e.g., the term `Spielberg' correlates with positively reviewed movies, even though the term itself does not semantically convey a positive sentiment. In this paper, we propose a method to distinguish spurious and genuine correlations in text classification. We treat this as a supervised classification problem, using features derived from treatment effect estimators to distinguish spurious correlations from "genuine" ones. Due to the generic nature of these features and their small dimensionality, we find that the approach works well even with limited training examples, and that it is possible to transport the word classifier to new domains. Experiments on four datasets (sentiment classification and toxicity detection) suggest that using this approach to inform feature selection also leads to more robust classification, as measured by improved worst-case accuracy on the samples affected by spurious correlations.
description: Findings of EMNLP-2020
Λογισμικό χαρτογράφησης για φορητή συσκευή με δέκτη GPS:
Creators: name: Χατζηιωάννου, Μιχαήλ Βασιλείου
Publisher: name: Aristotle University of Thessaloniki
Year: 2010
Subjects: Λογισμικό
Χαρτογράφηση
GPS
Mobile GIS
Hanheld device
GPS data

description: Η παρούσα μεταπτυχιακή διατριβή, με τίτλο “Λογισμικό Χαρτογράφησης για Φορητή Συσκευή με Δέκτη GPS”, ασχολείται με τη δημιουργία και την παρουσίαση ενός λογισμικού για συλλογή δεδομένων στο πεδίο, μέσω μιας φορητής συσκευής GPS. Για να γίνει πιο συγκεκριμένο το θέμα γύρω από το οποίο κινείται το παρόν λογισμικό, χρησιμοποιείται το παράδειγμα της συλλογής των δεδομένων που αφορούν τα δίκτυα ύδρευσης και αποχέτευσης μίας περιοχής. Η επιστημονική περιοχή, μέσα στην οποία βρίσκεται η παρούσα εργασία, είναι η περιοχή των συστημάτων γεωγραφικών πληροφοριών (GIS) και συγκεκριμένα της “φορητής έκφανσης” της τεχνολογίας αυτής, που είναι γνωστή και ως mobile GIS. Το είδος της μελέτης μπορεί να χαρακτηριστεί ως μελέτη συλλογής δεδομένων από το πεδίο (field mapping). Η εφαρμογή αναπύχθηκε με τον Qt Creator της Nokia. Η διεξαγωγή της εργασίας έγινε υπό την επίβλεψη του καθηγητή, του τμήματος Αγρονόμων και Τοπογράφων Μηχανικών της Πολυτεχνικής Σχολής του ΑΠΘ, Παρασχάκη Ιωάννη. Ευχαριστίες πρέπει να αποδοθούν στους υποψήφιους διδάκτορες, του ιδίου τμήματος, Καραμπουρνιώτη Ηρακλή και Γεροντίδη Νικόλαο για την αρωγή του στη διαδικασία της εκπόνησης του παρόντος θέματος καθώς και για τη συμβουλή τους πάνω στην επίλυση αντικειμενικών προβλημάτων.
description: This master thesis, titled “Mapping Application for Portable Device with GPS Receiver” deals with the creation and presentation of a software application for data collection in the field via a portable GPS receiver. In order to be the subject more specific, it is used the example of data, relating to water supply and sanitation network, in the area of AUTh's campus. The scientific area, in which the present thesis is located in, is the area of Geographic Information Systems (GIS), and more specific, the area of mobile GIS. The sort of this project can be described as a field data collection project (field mapping). The application was developed in Qt Creator. The conduct of this thesis was carried out under the supervision of professor Paraschakis Ioannis, from the Engineering School's department of Rural and Surveying Engineering of AUTh (Aristotle University of Thessaloniki). Acknowledgements must be attributed to doctoral candidates, of the same department, Karabourniotis Iraklis and Gerontidis Nikolaos, for their help on development process and for their advice on objective problems.
Cancellable elements of the lattice of monoid varieties
Creators: name: Gusev, Sergey V.
name: Lee, Edmond W. H.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20M07, 08B15

description: The set of all cancellable elements of the lattice of semigroup varieties has recently been shown to be countably infinite. But the description of all cancellable elements of the lattice $\mathbb{MON}$ of monoid varieties remains unknown. This problem is addressed in the present article. The first example of a monoid variety with modular but non-distributive subvariety lattice is first exhibited. Then a necessary condition of the modularity of an element in $\mathbb{MON}$ is established. These results play a crucial role in the complete description of all cancellable elements of the lattice $\mathbb{MON}$. It turns out that there are precisely five such elements.
description: 11 pages, 2 figures
Εντοπισμός και καταγραφή διαπολιτισμικών στοιχείων σε εγκεκριμένα εγχειρίδια της γαλλικής γλώσσας για την Πρωτοβάθμια Εκπαίδευση
Creators: name: Νάκου, Αλεξάνδρα Παναγιώτη
Publisher: name: Aristotle University of Thessaloniki
Year: 2010
Subjects: Διαπολιτισμικότητα
Διαπολιτισμικά στοιχεία
Διδακτικά εγχειρίδια
Διαπολιτισμική προσέγγιση
Interculturalism
Intercultural elements
Handbooks
Intercultural approach

description: Το 2008 ανακηρύχθηκε ως επίσημο ευρωπαϊκό έτος Διαπολιτισμικού Διαλόγου ανάμεσα στα κράτη-μέλη. Μέσα σε αυτό το κλίμα απαραίτητο εφόδιο για κάθε πολίτη αποτελεί η γλωσσομάθεια, η γνώση της γλώσσας αλλά και του πολιτισμού της κάθε γλώσσας. Με την παρούσα εργασία, θα εντοπιστούν και θα καταγραφούν στοιχεία διαπολιτισμικότητας στα διδακτικά εγχειρίδια Double Clic 1 & 2 και Salut! που χρησιμοποιούνται στο ελληνικό δημοτικό σχολείο. Έπειτα από λεπτομερή μελέτη των παραπάνω εγχειριδίων, παρατηρήθηκε ότι οι αναφορές σε διαπολιτισμικά στοιχεία δεν είναι αρκετές και ότι οι συγγραφείς των εγχειριδίων στοχεύουν περισσότερο στην ανάπτυξη των τεσσάρων ικανοτήτων επικοινωνίας, παρόλο που ισχυρίζονται ότι κατευθύνονται προς μία διαπολιτισμική προσέγγιση της γλώσσας.
description: 2008 was the official European year of Intercultural Dialogue between the states-member. Within this framework, language learning as well as language and culture knowledge is proved to be essential supplies for every citizen. In this thesis, intercultural elements will be identified and registered in the teaching handbooks, Double Clic 1, 2 and Salut!, that they are used in the Greek primary school. By studying meticulously the said handbooks, it was observed that there are not enough references to intercultural elements and handbooks writers aim to the development of four communication competences, even if they claim that they focus on an intercultural approach of language.
Short gamma-ray bursts from SGR giant flares and neutron star mergers: two populations are better than one
Creators: name: Chapman, Robert
name: Priddey, Robert S.
name: Tanvir, Nial R.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: There is increasing evidence of a local population of short duration Gamma-ray Bursts (sGRB), but it remains to be seen whether this is a separate population to higher redshift bursts. Here we choose plausible Luminosity Functions (LF) for both neutron star binary mergers and giant flares from Soft Gamma Repeaters (SGR), and combined with theoretical and observed Galactic intrinsic rates we examine whether a single progenitor model can reproduce both the overall BATSE sGRB number counts and a local population, or whether a dual progenitor population is required. Though there are large uncertainties in the intrinsic rates, we find that at least a bimodal LF consisting of lower and higher luminosity populations is required to reproduce both the overall BATSE sGRB number counts and a local burst distribution. Furthermore, the best fit parameters of the lower luminosity population agree well with the known properties of SGR giant flares, and the predicted numbers are sufficient to account for previous estimates of the local sGRB population.
description: 10 pages, 7 figures, 4 tables. Replaced with version accepted by MNRAS