From spirals to lenticulars: evidence from the rotation curves and mass models of three early-type galaxies

Rotation curves have traditionally been difficult to trace for early-type galaxies (ETGs) because they often lack a high-density disk of cold gas as in late-type galaxies (LTGs). We derive rotation curves for three lenticular galaxies from the ATLAS3D survey, combining CO data in the inner parts with deep HI data in the outer regions, extending out to 10-20 effective radii. We also use Spitzer photometry at 3.6 um to decompose the rotation curves into the contributions of baryons and dark matter (DM). We find that (1) the rotation-curve shapes of these ETGs are similar to those of LTGs of similar mass and surface brightness; (2) the dynamically$-$inferred stellar mass-to-light ratios are small for quiescent ETGs but similar to those of star-forming LTGs; (3) the DM halos follow the same scaling relations with galaxy luminosity as those of LTGs; (4) one galaxy (NGC 3626) is poorly fitted by cuspy DM profiles, suggesting that DM cores may exist in high-mass galaxies too. Our results indicate that these lenticular galaxies have recently transitioned from LTGs to ETGs without altering their DM halo structure (e.g., via a major merger) and could be faded spirals. We also confirm that ETGs follow the same radial acceleration relation as LTGs, reinforcing the notion that this is a universal law for all galaxy types.Comment: Accepted for publication in A&

Programa intensivo ERASMUS: TOPCART. Documentación Geométrica del Patrimonio (memoria de actividades 2010-2011)

[EN] Data contained in this record come from the following accademic activity (from which it is possible to locate additional records related with the Monastery):● LDGP_inv_002: "Intensive Program ERASMUS: TOPCART. Geometric Documentation of the Heritage (administrative and academic documentation)", http://hdl.handle.net/10810/9906[ES] Los datos de este registro provienen de la una actividad académica que también aparece descrita en el repositorio y desde donde se puede acceder a otros trabajos relacionados con el Monasterio:● LDGP_inv_002: "Programa intensivo ERASMUS: TOPCART. Documentación Geométrica del Patrimonio (documentación administrativa y académica)", http://hdl.handle.net/10810/9906[EN] The main objective this project is looking for is the exchange of practical methodologies, in topics related with the measure and representation of heritage, between teachers and specially students from different countries. For the achievement of this aim we expect the participation of a group of about 30 students and 8 lecturers from Germany, Italy, Greece, Lithuania and Spain.Activities will be focused on the development of concrete projects in documentation of heritage, specifically in the San Prudencio Monastery (La Rioja, Spain). In this site, digital techniques for the acquisition of geometric information from GPS equipment, surveying total stations, laser scanner and photogrammetry systems, will be put into practice.Obtained data will be processed as follows: first of all, they will be documented by adding necessary metadata in order to ensure their use in the future, then, they will be treated to obtain cartographic representations and virtual models which can be distributed on the Internet.As results we expect: metric data of the monument, graphic models for difussion and collaboration partnertships.[ES] El objetivo principal que se persigue en este proyecto es el intercambio de metodológico práctico, en materias afines a la medida y la representación del patrimonio, entre profesores y fundamentalmente alumnos, de diferentes países. Para la consecución de este fin se espera la participación de un grupo de aproximadamente 25 alumnos y 8 profesores de (Alemania, Italia, Grecia, Lituania y España).Las actividades se centrarán en el desarrollo de proyectos concretos de documentación de elementos patrimoniales, en concreto el apartado práctico se desarrollará en el Monasterio de San Prudencio (La Rioja, España). En el se aplicarán técnicas digitales de registro de información geométrica, constituidas por receptores GPS, estaciones totales topográficas, escáneres láser y sistemas fotogramétricos.Los datos obtenidos serán tratados de la siguiente manera: en primer lugar serán documentados, mediante la adición de la metainformación necesaria para garantizar su utilidad a lo largo del tiempo, seguidamente serán procesados con el fin de obtener las representaciones cartográficas y modelos virtuales de representación que puedan ser difundidas por medio de Internet.Como resultados se pretenden: un conjunto de registros métricos del momento de la intervención, modelos gráficos de difusión y finalmente relaciones de colaboración interpersonal e interinstitucional.European Commission, DG Education and Culture (Erasmus 2009-1-ES1-ERAIP-0013, 2010-1-ES1-ERA10-0024); Organismo Autónomo Programas Educativos Europeos (OAPEE); Gobierno de La Rioja (Spain); Universidad de La Rioja; Clavijo City Council; Logroño City Council; Ilustre Colegio de Ingenieros Técnicos en Topografía (Delegación de La Rioja)[ES] Memoria de proyecto (PDF) [es el último fichero de la lista, el enlace directo es https://addi.ehu.es/bitstream/10810/7053/1053/ldgp_mem011-1_Clavijo_SanPrudencio.pdf] + 11 imágenes de la visita preliminar en abril de 2009, en formato JPEG + 19 nubes de puntos en formato txt (comprimido en ZIP junto a un fichero de metadatos y una imagen que sirve de croquis y que también se presenta suelta) + 27 fotografías tomadas desde un helicóptero radicontrolado en 2011 por el grupo H (JPEG) + 18 fotografías métricas del edificio en forma de -L- tomadas desde el Sur + 13 fotografías métricas del edificio en forma de -L- tomadas desde el Este + 95 fotografías métricas del interior del edificio en forma de -L- (JPEG) + 35 fotografías métricas tomadas desde el cerro que se encuentra al sur (JPEG) + 8 fotografías métricas que forman 4 pares estereoscópicos (2 del grupo B y 2 del grupo D) (JPEG) + 183 fotografías métricas que forman 91 tripletas (grupos B, C y D) (JPEG). [NOTA: este registro no está cerrado, se irán incorporando nuevos materiales de forma progresiva][EN] General report (PDF) [it is the last file of the list, the direct link is https://addi.ehu.es/bitstream/10810/7053/1053/ldgp_mem011-1_Clavijo_SanPrudencio.pdf] + 11 pictures taken during the preliminary visit in April 2009 (JPEG format) + 19 point clouds in plain text (compressed in a ZIP file together with a file with metadata and an image PNG as sketch, these image are also presented on their own) + 27 photographs taken from a remote-controlled helicopter for the group H in 2011(JPEG) + 18 metric pictures of the L-shaped building taken from the South (JPEG) + 13 metric pictures of the L-shaped building taken from the East (JPEG) + 95 metric pictures of the inside part of the L-shaped building (JPEG) + 35 metric photographs taken from the hill opposite in the Southern + 8 metric photographs in four stereopairs (2 from group B and 2 from group D) (JPEG) + 183 metric photographs arranged in 91 triplets from groups B, C and D (JPEG). [NOTE: this record is not closed, more data will be uploaded progressively

Fusion of multitemporal optical and sar remote sensing data for change detection in open-pit mines

Εθνικό Μετσόβιο Πολυτεχνείο--Μεταπτυχιακή Εργασία. Διεπιστημονικό-Διατμηματικό Πρόγραμμα Μεταπτυχιακών Σπουδών (Δ.Π.Μ.Σ.) “Γεωπληροφορική

Investigating dynamic variables with eye movement analysis on visual scenes

116 σ.Η διπλωματική εργασία αποτελεί τμήμα ευρύτερης εμπειρικής έρευνας της από κοινού λειτουργίας των δυναμικών μεταβλητών “διάρκεια” και “ρυθμός αλλαγής” και της επιρροής τους στην αποτελεσματικότητα της οπτικής αναζήτησης της κίνησης. Η κίνηση αποτελεί κυρίαρχο και αδιαμφισβήτητο χαρακτηριστικό που παρατηρείται σε στάδιο προ-προσοχής και καθοδηγεί την οπτική προσοχή. Ο προσδιορισμός του κατάλληλου εύρους των τιμών του ρυθμού αλλαγής, βασίστηκε στην κίνηση ενός σημειακού συμβόλου -αλλαγή σε τοποθεσία- σε οπτικές σκηνές λευκού υποβάθρου. Ως ρυθμός αλλαγής θεωρείται το πηλίκο της σταθερής, σε αριθμό, αλλαγής σε θέση του σημειακού συμβόλου στις οπτικές σκηνές, ως προς τη μεταβλητή διάρκεια προβολής τους. Η ερευνητική διαδικασία, πραγματοποιήθηκε μέσω ανάλυσης των οφθαλμικών κινήσεων και διεκπεραιώθηκε σε συνθήκες ελεύθερης παρατήρησης, χωρίς τα υποκείμενα να έχουν κάποια συγκεκριμένη εργασία να εκτελέσουν. Οι οφθαλμικές κινήσεις μεταφράζονται σε προσηλώσεις και η διερεύνηση της αποτελεσματικής οπτικής αναζήτησης της κίνησης σε σχέση με τη διάρκεια και το μέγεθος της μετακίνησης παρουσιάζεται διαγραμματικά. Από το διάγραμμα προκύπτει η ζώνη επιρροής της διάρκειας στην ανίχνευση του κινούμενου συμβόλου και τα αποτελέσματα συγκρίνονται με τα αντίστοιχα σε παράλληλη έρευνα (Λόκκα 2013), ώστε να εντοπιστεί ο βαθμός επιρροής των περισπαστών του υποβάθρου στην ανίχνευση του κινούμενου συμβόλου, σε οπτικές σκηνές με υπόβαθρο τοπογραφικό χάρτη.The diploma thesis is an empirical study of the joint function of the dynamic variables of “duration” and “rate of change” and their influence in the effectiveness in blank visual scenes, in the frame of a wider research project. Motion is a dominant and undoubted preattentive feature that guides visual attention. Thus, the investigation of the optimal limits of rate of change is examined through motion of a point symbol -change in position- in blank visual scenes. The dynamic variable of rate of change is examined in relation to constant change in position of the point symbol in each visual scene and their variable duration. The experimental procedure was curried out throughout eye movement analysis and performed under free viewing conditions, where the subjects did not have any particular task to fulfill (task independent). The eye movements are rendered into fixations and the examination of the effective visual search of motion is presented in a diagram, in relation to duration and distance of the shift. From that diagram, the influence zone of duration of a moving point symbol’ s detection is derived and the results are compared to parallel study (Lokka 2013), in order to trace the amount of the effect of the distractors in the detection of the moving symbol in visual scenes with topographic map as background.Αλεξάνδρα Κ. Λέλλ

Usage of the HINTS exam and neuroimaging in the assessment of peripheral vertigo in the emergency department

Abstract Background Dizziness is a common presenting symptom in the emergency department (ED). The HINTS exam, a battery of bedside clinical tests, has been shown to have greater sensitivity than neuroimaging in ruling out stroke in patients presenting with acute vertigo. The present study sought to assess practice patterns in the assessment of patients in the ED with peripherally-originating vertigo with respect to utilization of HINTS and neuroimaging. Methods A retrospective cohort study was performed using data pertaining to 500 randomly selected ED visits at a tertiary care centre with a final diagnostic code related to peripherally-originating vertigo between January 1, 2010 - December 31, 2014. Results A total of 380 patients met inclusion criteria. Of patients presenting to the ED with dizziness and vertigo and a final diagnosis of non-central vertigo, 139 (36.6%) received neuroimaging in the form of CT, CT angiography, or MRI. Of patients who did not undergo neuroimaging, 17 (7.1%) had a bedside HINTS exam performed. Almost half (44%) of documented HINTS interpretations consisted of the ambiguous usage of “HINTS negative” as opposed to the terminology suggested in the literature (“HINTS central” or “HINTS peripheral”). Conclusions In this single-centre retrospective review, we have demonstrated that the HINTS exam is under-utilized in the ED as compared to neuroimaging in the assessment of patients with peripheral vertigo. This finding suggests that there is room for improvement in ED physicians’ application and interpretation of the HINTS exam