cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Sonnenfleckenzeichnung Nr. 118.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 24.05.1987, 07:30, erstellt von Marco Cortesi, Sonnenobservatorium Specola Solare Ticinese in Locarno
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 1987

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 4.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
Detailed analysis of the variable star population in the globular cluster NGC 7006
Creators: name: Ferro, A. Arellano
name: Galindo, F. C. Rojas
name: Fierro, I. H. Bustos
name: Muneer, S.
name: Yepez, M. A.
name: Giridhar, Sunetra
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: A five year CCD photometric \emph{VI} time-series of NGC 7006 is employed to perform a detailed analysis of the known population of variable stars. In the process we have corrected inconsistent classifications, sky coordinates and found ten new cluster member variables. An independent reddening estimate with a value $E(B-V)=0.08\pm0.05$ is made. Using Fourier decompositions of RR Lyrae light curves and well established calibrations, the cluster mean metallicity and distance [Fe/H]$_{\rm ZW}= -1.53\pm0.15$ and $41.2\pm1.4$ kpc are estimated based on an extended sample of cluster member RRab stars. Using the $Gaia$-DR3 data we performed an extensive membership analysis which leads to a clean Colour-Magnitude diagram, and hence to the identification of variables that are likely field stars, and to considerations on the variables distribution in the Horizontal Branch (HB). A double mode RR Lyrae and three CW star are discussed. The origin of CW stars from precursors in the blue tail of the HB with very thin ($\sim 0.06 \pm 0.01 M_{\odot}$) envelopes is argued. Our models indicate that the Main Sequence predecessor of RR Lyrae stars had a mass of 0.82-0.85 $M_{\odot}$ and lost about 25-35\% of its mass during the red giant branch events before settling in the HB some 12-13.5 Gyrs later.
description: 16 pages, 5 Tables, 8 Figures. Accepted by MNRAS November 8, 2022
Sonnenfleckenzeichnung Nr. 292.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 22.12.1987, 09:00, erstellt von Sergio Cortesi, Sonnenobservatorium Specola Solare Ticinese in Locarno
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 1987

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 3.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
Nonlinear drift-diffusion model of gating in the fast Cl channel
Creators: name: Vaccaro, Samuel R.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Physical sciences

description: The dynamics of the open or closed state region of an ion channel may be described by a probability density $p(x,t)$ which satisfies a Fokker-Planck equation. The closed state dwell-time distribution $f_c(t)$ derived from the Fokker-Planck equation with a nonlinear diffusion coefficient $D(x) \propto \exp(-γx)$, $γ> 0$ and a linear ramp potential $U_c(x)$, is in good agreement with experimental data and it may be shown analytically that if $γ$ is sufficiently large, $f_c(t) \propto t^{-2 - ν}$ for intermediate times, where $ν= U_c^{\prime}/γ\approx -0.3$ for a fast Cl channel. The solution of a master equation which approximates the Fokker-Planck equation exhibits an oscillation superimposed on the power law trend and can account for an empirical rate-amplitude correlation that applies to several ion channels.
Signatures of dynamic fibrils at the coronal base: Observations from Solar Orbiter/EUI
Creators: name: Mandal, Sudip
name: Peter, Hardi
name: Chitta, Lakshmi Pradeep
name: Cuadrado, Regina A.
name: Schühle, Udo
name: Teriaca, Luca
name: Solanki, Sami K.
name: Harra, Louise
name: Berghmans, David
name: Auchère, Frédéric
name: Parenti, Susanna
name: Zhukov, Andrei N.
name: Buchlin, Éric
name: Verbeeck, Cis
name: Kraaikamp, Emil
name: Rodriguez, Luciano
name: Long, David M.
name: Schwanitz, Conrad
name: Barczynski, Krzysztof
name: Pelouze, Gabriel
name: Smith, Philip J.
name: Liu, Wei
name: Cheung, Mark C.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The solar chromosphere hosts a wide variety of transients, including dynamic fibrils (DFs) that are characterised as elongated, jet-like features seen in active regions, often through H$α$ diagnostics. So far, these features have been difficult to identify in coronal images primarily due to their small size and the lower spatial resolution of the current EUV imagers. Here we present the first unambiguous signatures of DFs in coronal EUV data using high-resolution images from the Extreme Ultraviolet Imager (EUI) on board Solar Orbiter. Using the data acquired with the 174~Å High Resolution Imager (HRI$_{EUV}$) of EUI, we find many bright dot-like features (of size 0.3-0.5 Mm) that move up and down (often repeatedly) in the core of an active region. In a space-time map, these features produce parabolic tracks akin to the chromospheric observations of DFs. Properties such as their speeds (14 km~s$^{-1}$), lifetime (332~s), deceleration (82 m~s$^{-2}$) and lengths (1293~km) are also reminiscent of the chromospheric DFs. The EUI data strongly suggest that these EUV bright dots are basically the hot tips (of the cooler chromospheric DFs) that could not be identified unambiguously before because of a lack of spatial resolution.
description: Accepted for publication in A&A Letters. Event movie can be downloaded from https://drive.google.com/file/d/1o_4jHA5JbyQtrpUBtB3ItE_s3HjF6ncc/view?usp=sharing
Sonnenfleckenzeichnung Nr. 89.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 19.04.1987, 08:00, erstellt von Marco Cortesi, Sonnenobservatorium Specola Solare Ticinese in Locarno
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 1987

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 4.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
Towards a learning-based performance modeling for accelerating Deep Neural Networks
Creators: name: Perri, Damiano
name: Labini, Paolo Sylos
name: Gervasi, Osvaldo
name: Tasso, Sergio
name: Vella, Flavio
Publisher: name: arXiv
Year: 2022
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Emerging applications such as Deep Learning are often data-driven, thus traditional approaches based on auto-tuners are not performance effective across the wide range of inputs used in practice. In the present paper, we start an investigation of predictive models based on machine learning techniques in order to optimize Convolution Neural Networks (CNNs). As a use-case, we focus on the ARM Compute Library which provides three different implementations of the convolution operator at different numeric precision. Starting from a collation of benchmarks, we build and validate models learned by Decision Tree and naive Bayesian classifier. Preliminary experiments on Midgard-based ARM Mali GPU show that our predictive model outperforms all the convolution operators manually selected by the library.
Sonnenfleckenzeichnung Nr. 129.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 05.06.1987, 07:30, erstellt von Sergio Cortesi, Sonnenobservatorium Specola Solare Ticinese in Locarno
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 1987

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 3.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
Geçmişten Geleceğe İki "Metropolis" Metropolis Antik Kenti ile Sinemadaki "Metropolis" Kenti Arasındaki Benzeşimin İncelenmesi
Creators: name: GÜRAL, Ufuk
Publisher: name: Zenodo
Year: 2024

description: Bilim Kurgu Sineması’nın en önemli örneklerinden biri olan 1926 tarihli Fritz Lang filmi “Metropolis”, ismini aldığı Anadolu’daki Metropolis kentiyle bazı ortak unsurları paylaşır. Yönetmen Fritz Lang, “Geçmişte Gelecek Vardır” sözüne öykünürcesine, antik çağdan ödünç aldığı unsurlarla, izleyiciyi gelecekteki bir kente yolculuğa çıkarmıştır. Her şeyden önce, “Metropolis” antik çağın yaşam stili olan planlanmış kenti geleceğe yansıtmıştır. Filmde, şeffaf kapsül şeklinde, hi-tech gelecek kentleri değil, Eski Yunan Tapınakları’na benzer, yatay veya düşey elemanlar barındıran yapılar tasarlanmıştır. Buharla çalışan fabrikalar, şehirdeki konstrüktivist yapılar, Katakomb, Moloch Makinası, Katedral ve mahallelerin tasarımları hemen hepsi antik çağdan kalan grid planlı rasyonalist kentleşme politikasını yansıtır. Ayrıca filmin başrolündeki Dişi Robot'un dış görünümü, Metropolis antik kentinden çıkan Hygeia ve Ares betimlemeleriyle benzerlik gösterir. Nitekim sinema tarihinin takip eden dönemindeki robotlar, yapay zekalarının yanı sıra insansı özelliklerini, en azından organik parça taşımaları açısından daha fazla oranda barındırmışlardır. Çalışmamızda, gerek görsel gerekse içerik anlamında İzmir’in Torbalı ilçesindeki Metropolis kenti ile filmdeki Metropolis Kenti arasındaki bağlantıyı görsellik ve içerik gibi farklı unsurlar paralelinde inceliyoruz.
Modellierung und Simulation von Bauelementen der Nano- und Optoelektronik
Creators: name: Gajewski, Herbert
name: Glitzky, Annegret
name: Griepentrog, Jens André
name: Hünlich, Rolf
name: Kaiser, Hans-Christoph
name: Rehberg, Joachim
name: Röpke, Wilfried
name: Stephan, Holger
name: Wenzel, Hans
Publisher: name: Weierstrass Institute
Year: 1996

description: In vielen Zweigen der modernen Technik spielen nano- und optoelektronische Bauelemente eine wichtige Rolle. Zu ihrer Entwicklung sind mathematische Modellierung und numerische Simulation unverzichtbare Hilfsmittel. Am Weierstraß-Institut wurde in den letzten Jahren intensiv an der mathematischen Modellierung von Technologieschritten zur Herstellung von Bauelementen und der in ihnen ablaufenden Ladungstransportprozesse gearbeitet. Auf der Grundlage der Analyse der beschreibenden Systeme nichtlinearer partieller Differentialgleichungen entstanden die weithin akzeptierten Simulationsprogramme DIOS (Diffusion, Implantation, Oxidation in Semiconductors) und ToSCA (Two-dimensional Semiconductor Analysis Package). Im folgenden wird die Nutzung unserer Ergebnisse zur Entwicklung von Silizium-Germanium-Heterobipolartransistoren bzw. Quantum-Well-Halbleiterlasern im Rahmen zweier, durch das BMBF gefoerderter Projekte beschrieben. Beide Projekte leben von enger interdisziplinaerer Kooperation mit unseren Partnern vom Institut für Halbleiterphysik Frankfurt(Oder) bzw. vom Ferdinand-Braun-Institut für Höchstfrequenztechnik Berlin.
Sonnenfleckenzeichnung Nr. 75.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 01.04.1987, 09:30, erstellt von Sergio Cortesi, Sonnenobservatorium Specola Solare Ticinese in Locarno
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 1987

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 4.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
A Wavelet Algorithm for the Boundary Element Solution of a Geodetic Boundary Value Problem
Creators: name: Rathsfeld, Andreas
Publisher: name: Weierstrass Institute
Year: 1996
Subjects: subject: singular integral equation
subject: collocation
subject: wavelet algorithm.
subject: 45L10
subject: 65R20
subject: 65N38

description: In this paper we consider a piecewise bilinear collocation method for the solution of a singular integral equation over a part of the surface of the earth. This singular equation is the boundary integral equation corresponding to the oblique derivative boundary problem for Laplace's equation. We introduce special wavelet bases for the spaces of test and trial functions. Analogously to well-known results on wavelet algorithms, the stiffness matrices with respect to these bases can be reduced to sparse matrices such that the assembling of the matrices and the iterative solution of the matrix equations become fast. Though the theoretical results apply only to integral equations with "smooth" solutions over "smooth" manifolds, we present numerical tests for a geometry as difficult as the surface of the earth.
Causality in String Field Theory
Creators: name: Shabir, Arshid
name: Shah, Naveed Ahmad
name: Wani, Salman Sajad
name: Faizal, Mir
name: Jan, Kousar
name: Rubab, Seemin
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this letter, we will investigate causality in string field theory using pp-wave light-cone gauge string field theory. We will generalize the Ramsey scheme to string field theory, and use it to analyze string field theoretical processes. An explicit characteristic function for interactive string field theory will be built using this string field theoretical Ramsey scheme. The average of the difference between the initial and final values of any operator described in string field theory will be obtained using this characteristic function. We will use the quantum information theoretical technique based on quantum fisher information to extract information about such string field theoretical processes.
description: Accepted in EPL, 13 pages
Sonnenfleckenzeichnung Nr. 109.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 10.05.1987, 07:30, erstellt von Marco Cortesi, Sonnenobservatorium Specola Solare Ticinese in Locarno
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 1987

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 4.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
Innovative applications of stable carbon isotope ratio in environmental and food chemistry
Creators: name: Pironti, Concetta
Publisher: name: Universita degli studi di Salerno
Year: 2018
Subjects: subject: CHIM/06 CHIMICA ORGANICA

description: 2016 - 2017
description: In the last year, the stable isotope ratio analysis has become a useful tool with many applications in different scientific area. In particular the characteristic isotope signature of materials has permitted to identify authenticity and traceability of food sample and isotope composition has become a valuable marker in environmental studies. This work shows the applicability of analytical methods for isotopic carbon determination in food and environmental samples and the innovative use of δ13C in cultural heritage as valuable tool to trace pollutant fate. The first part is dedicated to the improvement of spectroscopic methods as Fourier Transform Infrared (FT-IR) and Non-Dispersive Infrared spectroscopy (NDIRS) and their application to identify geographical origin in sample like pasta, cocoa, olive oil. The results conducted in order to assess the robustness of the two alternative methods respecting IRMS showed a strong correlation like a demonstration of the positive relationship between the tested analytical methods. A new method was developed 13C NMR spectroscopy to determine the bulk 13C/12C carbon isotope ratio of inorganic carbonates and bicarbonates at natural abundance. In literature the use of 13C NMR spectroscopy was focused on 13C position-specific isotope analysis of organic molecules; in this work it was reported the improvement of NMR methodology able to obtain stable carbon isotope ratio in bulk material using an internal standard. .. [edited by Author]
Sonnenfleckenzeichnung Nr. 239.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 01.10.1987, 08:15, erstellt von Sergio Cortesi, Sonnenobservatorium Specola Solare Ticinese in Locarno
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 1987

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 4.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
title: Συμπεριφορά παλαιών (ντόπιων) και νέων ποικιλιών μαλακού και σκληρού σίτου σε περιβάλλον βιολογικής και συμβατικής καλλιέργειας
titleType: AlternativeTitle
Creators: name: Κουτής, Κωνσταντίνος
Publisher: name: University of Thessaly
Year: 2004
Subjects: subject: ΣΙΤΟΣ -- ΚΑΛΛΙΕΡΓΕΙΑ
subject: ΣΙΤΟΣ -- ΠΟΙΚΙΛΙΕΣ

description: Παρατηρήσεις έκδοσης: λείπει η σελίδα 25 από το φυσικό τεκμήριο.
description: Η αγρονομική συμπεριφορά παλαιών και νέων ποικιλιών μαλακού και σκληρού σιταριού μελετήθηκε την καλλιεργητική περίοδο 2002-2003, ώστε να μπορέσουν να αξιοποιηθούν σε συστήματα χαμηλών εισροών και ιδιαίτερα βιολογικής καλλιέργειας, με απώτερο στόχο την παραγωγή προϊόντων υψηλής ποιότητας. Για το σκοπό αυτό δοκιμάστηκαν έξι ποικιλίες μαλακού (Triticum aestivum L), (4 παλαιές και δύο νέες ) και έξι σκληρού (Triticum turgidum L. var. durum) σιταριού, (4 παλαιές και δύο νέες) αντίστοιχα, σε περιβάλλον συμβατικής και βιολογικής καλλιέργειας. Οι νεότερες ποικιλίες είναι δημιουργίες του Ινστιτούτο Σιτηρών Θεσ/νίκης, οι δε παλαιές είναι εγχώριοι αβελτίωτοι πληθυσμοί που προέρχονται από την βασική συλλογή της Ελληνικής Τράπεζα Γενετικού Υλικού Το πείραμα πραγματοποιήθηκε στο Δίλοφο Φαρσάλων, σε δύο χωριστά τμήματα αγρών γειτονικών μεταξύ τους, που συνορεύουν και είναι παρόμοιοι από εδαφολογικής άποψης, στους οποίους εφαρμόζεται, στο μεν ένα κλασσική συμβατική καλλιέργεια και στο άλλο βιολογική καλλιέργεια από 15ετίας. Το πειραματικό σχέδιο ήταν το ίδιο και. στους δύο αγρούς και ήταν αυτό των πλήρως τυχαιοποιημένων ομάδων (RCB) με 12 ποικιλίες και πέντε (5) επαναλήψεις. Μετρήθηκαν διάφορα μορφολογικά και φυσιολογικά χαρακτηριστικά καθώς και η τελική απόδοση σε σπόρο. Από τα αποτελέσματα προέκυψε ότι η βιολογική καλλιεργητική πρακτική και ιδιαίτερα η αμειψισπορά διατήρησε και βελτίωσε τη γονιμότητα του εδάφους εξασφαλίζοντας ικανοποιητικές συνθήκες ανάπτυξης των φυτών. Επιπλέον έκανε μη αναγκαία την εφαρμογή εξωτερικής λίπανσης και ζιζανιοκτονίας, μειώνοντας έτσι σημαντικά το κόστος παραγωγής. Από την άλλη η βελτίωση των συνθηκών καλλιέργειας λόγω εισροών (λίπανση, ζιζανιοκτονία) στον συμβατικό αγρό, ενίσχυσε την ανάπτυξη της καλλιέργειας μετά το αδέρφωμα, αύξησε την ομοιομορφία των φυτών και προκάλεσε αύξηση της παραγωγής σε σπόρο 10%, έναντι του βιολογικού αγρού. Οι σύγχρονες ποικιλίες μαλακού σιταριού Ωρωπός και Ελισάβετ αντέδρασαν καλύτερα και στα δύο συστήματα παραγοιγής, ήταν πιο ομοιόμορφες και δεν πλάγιασαν. Επίσης μπόρεσαν να αξιοποιήσουν καλύτερα τις αποθησαυριστικές ουσίες, να συντηρήσουν μεγαλύτερο αριθμό γόνιμοιν στάχεων ανά επιφάνεια και τελικώς να έχουν μεγαλύτερη απόδοση σε καρπό σε σχέση με τις αντίστοιχες παλαιές. Επιπλέον ήταν οι πιο αποδοτικές ποικιλίες με το συμβατικό τρόπο παραγωγής. Οι παραδοσιακές ποικιλίες σκληρού σιταριού, γενικά, απέδωσαν περισσότερο και στα δύο συστήματα παραγωγής από τις σύγχρονες αντίστοιχες ποικιλίες επιβεβαιώνοντας ότι αποτελούν πολύτιμη πηγή γενετικού πλούτου για την γεωργία της Μεσογείου. Από αυτές, οι παλιές ποικιλίες Σκληρόπετρα Πτολεμαίδας και Μαυραγάνι Αργολίδας είχαν γενικά καλή αγρονομική συμπεριφορά και απέδωσαν περισσότερο από όλες τις ποικιλίες με το βιολογικό τρόπο παραγωγής.
GCM Constraints on the Detectability of the CO$_2$-CH$_4$ Biosignature Pair on TRAPPIST-1e with JWST
Creators: name: Rotman, Yoav
name: Komacek, Thaddeus D.
name: Villanueva, Geronimo L.
name: Fauchez, Thomas J.
name: May, Erin M.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Terrestrial exoplanets such as TRAPPIST-1e will be observed in a new capacity with JWST/NIRSpec, which is expected to be able to detect CO$_2$, CH$_4$, and O$_2$ signals, if present, with multiple co-added transit observations. The CO$_2$-CH$_4$ pair in particular is theorized to be a potential biosignature when inferred to be in chemical disequilibrium. Here, we simulate TRAPPIST-1e's atmosphere using the ExoCAM General Circulation Model (GCM), assuming an optimistic haze-free, tidally locked planet with an aquaplanet surface, with varying atmospheric compositions from $10^{-4}$ bar to 1 bar of partial CO$_2$ pressure with 1 bar of background N$_2$. We investigate cases both with and without a modern Earth-like CH$_4$ mixing ratio to examine the effect of CO$_2$ and CH$_4$ on the transmission spectrum and climate state of the planet. We demonstrate that in the optimistic haze-free cloudy case, H$_2$O, CO$_2$, and CH$_4$ could all be detectable in less than 50 transits within an atmosphere of 1 bar N$_2$ and 10 mbar CO$_2$ during JWST's lifespan with NIRSpec as long as the noise floor is $\lesssim$ 10 ppm. We find that in these optimistic cases, JWST may be able to detect potential biosignature pairs such as CO$_2$-CH$_4$ in TRAPPIST-1e's atmosphere across a variety of atmospheric CO$_2$ content, and that temporal climate variability does not significantly affect spectral feature variability for NIRSpec PRISM.
description: 11 pages, 4 figures, 1 table, accepted for publication in ApJL
title: Διδασκαλία πιθανοτήτων σε ενήλικες μαθητές
titleType: AlternativeTitle
Creators: name: Στοφοριάδης, Χαράλαμπος
Publisher: name: University of Thessaly
Year: 2008
Subjects: subject: ΕΚΠΑΙΔΕΥΣΗ ΕΝΗΛΙΚΩΝ -- ΜΕΛΕΤΗ ΚΑΙ ΔΙΔΑΣΚΑΛΙΑ -- ΕΛΛΑΔΑ
subject: ΠΙΘΑΝΟΤΗΤΕΣ -- ΜΕΛΕΤΗ ΚΑΙ ΔΙΔΑΣΚΑΛΙΑ

description: Παρατηρήσεις έκδοσης: λείπουν οι σελίδες 59-60 από το φυσικό τεκμήριο.
Bolosoma Ijima 1904
Creators: name: Castello-Branco, Cristiana
name: Collins, Allen G.
name: Hajdu, Eduardo
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Porifera
Hexactinellida
Lyssacinosida
Euplectellidae
Bolosoma

description: Genus Bolosoma Ijima (1904) Diagnosis Body is fungiform, pedunculate, basiphytous with a more-or-less everted atrial cavity. Choanosomal spicules predominantly diactins, rarely hexactins and pentactins too. The spicules of the peduncle are diactins fused into a rigid skeleton by synapticular junctions. Dermalia and atrialia are hexactins, rarely pentactins. Microscleres are anchorate and toothed discohexasters, discasters, hemidiscohexasters, discohexactins, and derivatives of the latter to amphidiscs (Tabachnick, 2002 modi fi ed by Reiswig & Kelly (2011)).
description: Published as part of Castello-Branco, Cristiana, Collins, Allen G. & Hajdu, Eduardo, 2020, A collection of hexactinellids (Porifera) from the deep South Atlantic and North Pacific: new genus, new species and new records, pp. e 9431 in PeerJ 8 on page 10, DOI: 10.7717/peerj.9431, http://zenodo.org/record/4624210
description: {"references": ["Ijima I. 1904. Studies on the Hexactinellida: Contribution IV. (Rossellidae). Journal of the College of Sciences, Imperial University of Tokyo 18 (7): 1 - 307.", "Tabachnick KR. 2002. Family Euplectellidae Gray, 1867. In: Hooper JNA, Van Soest RWM, eds. Systema Porifera: A guide to the classification of sponges. Vol. 2. New York: Kluwer Academic / Plenum Publishers, 1388 - 1434."]}
Towards Stroke Patients' Upper-limb Automatic Motor Assessment Using Smartwatches
Creators: name: Bensalah, Asma
name: Chen, Jialuo
name: Fornés, Alicia
name: Carmona-Duarte, Cristina
name: Lladós, Josep
name: Ferrer, Miguel A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Assessing the physical condition in rehabilitation scenarios is a challenging problem, since it involves Human Activity Recognition (HAR) and kinematic analysis methods. In addition, the difficulties increase in unconstrained rehabilitation scenarios, which are much closer to the real use cases. In particular, our aim is to design an upper-limb assessment pipeline for stroke patients using smartwatches. We focus on the HAR task, as it is the first part of the assessing pipeline. Our main target is to automatically detect and recognize four key movements inspired by the Fugl-Meyer assessment scale, which are performed in both constrained and unconstrained scenarios. In addition to the application protocol and dataset, we propose two detection and classification baseline methods. We believe that the proposed framework, dataset and baseline results will serve to foster this research field.
The RPM3D project: 3D Kinematics for Remote Patient Monitoring
Creators: name: Fornés, Alicia
name: Bensalah, Asma
name: Carmona-Duarte, Cristina
name: Chen, Jialuo
name: Ferrer, Miguel A.
name: Fischer, Andreas
name: Lladós, Josep
name: Martín, Cristina
name: Opisso, Eloy
name: Plamondon, Réjean
name: Scius-Bertrand, Anna
name: Tormos, Josep Maria
Publisher: name: arXiv
Year: 2022
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: This project explores the feasibility of remote patient monitoring based on the analysis of 3D movements captured with smartwatches. We base our analysis on the Kinematic Theory of Rapid Human Movement. We have validated our research in a real case scenario for stroke rehabilitation at the Guttmann Institute5 (neurorehabilitation hospital), showing promising results. Our work could have a great impact in remote healthcare applications, improving the medical efficiency and reducing the healthcare costs. Future steps include more clinical validation, developing multi-modal analysis architectures (analysing data from sensors, images, audio, etc.), and exploring the application of our technology to monitor other neurodegenerative diseases.
Equidistribution of rational functions having a superattracting periodic point towards the activity current and the bifurcation current
Creators: name: Okuyama, Yûsuke
Publisher: name: arXiv
Year: 2014
Subjects: subject: Dynamical Systems (math.DS)
subject: Complex Variables (math.CV)
subject: FOS: Mathematics

description: We establish an approximation of the activity current $T_c$ in the parameter space of a holomorphic family $f$ of rational functions having a marked critical point $c$ by parameters for which $c$ is periodic under $f$, i.e., is a superattracting periodic point. This partly generalizes a Dujardin--Favre theorem for rational functions having preperiodic points, and refines a Bassanelli--Berteloot theorem on a similar approximation of the bifurcation current $T_f$ of the holomorphic family $f$. The proof is based on a dynamical counterpart of this approximation.
description: 12 pages
Bolosoma perezi Castello-Branco & Collins & Hajdu 2020, sp. nov.
Creators: name: Castello-Branco, Cristiana
name: Collins, Allen G.
name: Hajdu, Eduardo
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Porifera
Hexactinellida
Lyssacinosida
Euplectellidae
Bolosoma
Bolosoma perezi

description: Bolosoma perezi sp. nov. (Figs. 6 and 7) Type Material Holotype. MNRJ 21955, Rio Grande Rise, Southwest Atlantic (PROERG Expedition, ERG 15 — L 2; 31 7 ′ 3.36 ″ S / 34 1 ′ 48.72 ″ W), 1,022– 1,013 m depth, 07.VII.2011. LSID: urn:lsid:zoobank.org:act:CAD5EDB9-DB39-4684-A160-95EA2FA21210 Diagnosis Bolosoma perezi sp. nov. is the only Bolosoma with discohexasters and codonhexasters microscleres. EXTERNAL MORPHOLOGY. Sponge fragment, cushion-shaped and compressible, 162 mm in length × 78 mm in width × 16–27 mm in height; fragment apparently without a peduncle, color light gray in ethanol (fi g. 6). SKELETON AND SPICULES. A few long cemented diactins (40–80 m m diameter and over 900 m m long), which we assume are fragments of a peduncle. Choanosomal diactins with rough ends and rudiments of tangential rays (1,275–3,125 × 5–8 m m). Dermal and atrial hexactins and rare atrial pentactins with rough ends and sometimes random spines along the ray (270‒830 × 5‒8 m m). Microscleres are ball-like discohexasters (70‒80 m m diameter), its derivates (stauractins, 42–50 m m diameter), and codonhexasters (155–175 m m diameter, primary rosettes 27–43 m m diameter). The last one with six primary rays and secondary rays in number of four; discs with nine teeth (fi g. 7). DISTRIBUTION AND ECOLOGY. Known only from its type locality in the Rio Grande Rise (Southwest Atlantic), 1,022–1,013 m depth. This is the fi rst record of Bolosoma for the entire Atlantic Ocean. ETYMOLOGY. The speci fi c epithet honors Prof. Dr. Angel Perez (UNIVALI, Brazil) for granting us access to Rio Grande Rise materials, and for our long-standing collaboration in the study of South Atlantic deep-sea ecosystems. Remarks Bolosoma comprises eight species (see comparative Table 1), up to now recorded only from the Paci fi c Ocean. The new species presents a unique set of spicules, indicating its distinctiveness from the remaining species in the genus. None of its congeners present the combination of delicate codonhexasters and “ball-like” discohexasters, which confers B. perezi sp. nov. obvious status as a new species. This is the fi rst record of Bolosoma for the Atlantic Ocean.
description: Published as part of Castello-Branco, Cristiana, Collins, Allen G. & Hajdu, Eduardo, 2020, A collection of hexactinellids (Porifera) from the deep South Atlantic and North Pacific: new genus, new species and new records, pp. e 9431 in PeerJ 8 on pages 11-13, DOI: 10.7717/peerj.9431, http://zenodo.org/record/4624210
Integrating multi-type aberrations from DNA and RNA through dynamic mapping gene space for subtype-specific breast cancer driver discovery
Creators: name: Xi, Jianing
name: Deng, Zhen
name: Liu, Yang
name: Wang, Qian
name: Shi, Wen
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantitative Methods (q-bio.QM)
subject: FOS: Biological sciences

description: Driver event discovery is a crucial demand for breast cancer diagnosis and therapy. Especially, discovering subtype-specificity of drivers can prompt the personalized biomarker discovery and precision treatment of cancer patients. still, most of the existing computational driver discovery studies mainly exploit the information from DNA aberrations and gene interactions. Notably, cancer driver events would occur due to not only DNA aberrations but also RNA alternations, but integrating multi-type aberrations from both DNA and RNA is still a challenging task for breast cancer drivers. On the one hand, the data formats of different aberration types also differ from each other, known as data format incompatibility. One the other hand, different types of aberrations demonstrate distinct patterns across samples, known as aberration type heterogeneity. To promote the integrated analysis of subtype-specific breast cancer drivers, we design a "splicing-and-fusing" framework to address the issues of data format incompatibility and aberration type heterogeneity respectively. To overcome the data format incompatibility, the "splicing-step" employs a knowledge graph structure to connect multi-type aberrations from the DNA and RNA data into a unified formation. To tackle the aberration type heterogeneity, the "fusing-step" adopts a dynamic mapping gene space integration approach to represent the multi-type information by vectorized profiles. The experiments also demonstrate the advantages of our approach in both the integration of multi-type aberrations from DNA and RNA and the discovery of subtype-specific breast cancer drivers. In summary, our "splicing-and-fusing" framework with knowledge graph connection and dynamic mapping gene space fusion of multi-type aberrations data from DNA and RNA can successfully discover potential breast cancer drivers with subtype-specificity indication.
description: 14 pages, 5 figures, 1 table
title: Αντιλήψεις παιδιών Δημοτικού σχολείου για τα απλά ηλεκτρικά κυκλώματα και την παράλληλη σύνδεση : σχεδιασμός μιας διδακτικής παρέμβασης με χρήση υπολογιστή
titleType: AlternativeTitle
Creators: name: Διβράμη, Τριανταφυλλιά
Publisher: name: University of Thessaly
Year: 2007
Subjects: subject: ΗΛΕΚΤΡΙΚΑ ΚΥΚΛΩΜΑΤΑ
subject: ΦΥΣΙΚΕΣ ΕΠΙΣΤΗΜΕΣ -- ΜΕΛΕΤΗ ΚΑΙ ΔΙΔΑΣΚΑΛΙΑ (ΣΤΟΙΧΕΙΩΔΗΣ)

description: Παρατηρήσεις έκδοσης: λείπουν οι σελίδες 10 και 11 από το φυσικό τεκμήριο.
Modeling continuum polarization levels of tidal disruption events based on the collision-induced outflow mode
Creators: name: Charalampopoulos, Panos
name: Bulla, Mattia
name: Bonnerot, Clement
name: Leloudas, Giorgos
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: TDEs have been observed in the optical and UV for more than a decade but the underlying emission mechanism still remains a puzzle. It has been suggested that viewing angle effects could potentially explain their large photometric and spectroscopic diversity. Polarization is indeed sensitive to the viewing angle and the first polarimetry studies of TDEs are now available, calling for a theoretical interpretation. In this study, we model the continuum polarization levels of TDEs using the radiative transfer code POSSIS and the collision-induced outflow (CIO) TDE emission scenario where unbound shocked gas originating from a debris stream intersection point offset from the black hole, reprocesses the hard emission from the accretion flow into UV and optical bands. We explore two different cases of peak mass fallback rates M'p (~3 and ~0.3 Msol/yr) while varying the following geometrical parameters: the distance R_int from the black hole (BH) to the intersection point, the radius of the photosphere around the BH R_ph, on the surface of which the photons are generated, and the opening angle Deltheta (anisotropic emission). For the high mass fallback rate case, we find for every viewing angle polarization levels below one (P<1%) and P<0.5% for 10/12 simulations. The absolute value of polarization reaches its maximum (P_max) for equatorial viewing angles. For the low mass fallback rate case, the maximum value predicted is P~8.8% and P_max is reached for intermediate viewing angles. We find that the polarization depends strongly on i) the optical depths at the central regions set by the different M'p values and ii) the viewing angle. Finally, by comparing our model predictions to polarization observations of a few TDEs, we attempt to constrain their observed viewing angles and we show that multi-epoch polarimetric observations can become a key factor in constraining the viewing angle of TDEs.
description: Accepted for publication in Astronomy and Astrophysics journal; 20 pages
Spor Performansını Etkileyen Motivasyonel Faktörlerin İncelenmesi
Creators: name: AĞKÜN, Fatma Eda
Publisher: name: Zenodo
Year: 2024

description: Bu çalışma, motivasyon unsurlarına ve kapsama odaklanarak spor organizasyonlarında motivasyon ve performans birleştirme yöntemlerini araştırmayı sürdürmektedir. Bunu başarmak için çeşitli motivasyon türleri, araçlar, teoriler, performans kategorileri ve performans detayları hakkında ayrıntılı bilgiler, motivasyon ve performans üzerine bir literatür taraması yapıldı. Bulgular, spor organizasyonlarında çalışan motivasyonu ile performans arasında olumlu bir gelişme olduğunu ve spor yönetiminin dikkatine olan ihtiyacın arttığını vurgulamaktadır. Hem motivasyonun hem de performansın geliştirilmesi için yeteneklerini geliştirecek eğitimlerin alınması, ihtiyaçların karşılanması, yeterli kaynaklara ve uygun çalışma ortamına kazandırılması ve en önemli etkin yönetim uygulamalarıyla birlikte büyük önem taşınması söz konusudur. Bu fırsatları sağlayan spor organizasyonlarının daha yüksek düzeyde performans göstermesine neden olabileceği ve dolayısıyla sunacağı daha fazla değer ve prestije sahip bitki kuruluşları olarak konumlandırabilecekleri şekilde düzenlenebilmektedir.
Advhena Castello-Branco & Collins & Hajdu 2020, gen. nov.
Creators: name: Castello-Branco, Cristiana
name: Collins, Allen G.
name: Hajdu, Eduardo
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Porifera
Hexactinellida
Lyssacinosida
Euplectellidae
Advhena

description: Genus Advhena gen. nov. LSID: urn:lsid:zoobank.org:act:C9A45855-9AA8-4088-8665-9830A8CC59AB Type species: Advhena magnifica gen. et sp. nov. (described below) Diagnosis Bolosominae with a globular body slightly fl attened, with big lateral opening and long stalk (at least four times the body size). Choanosomal spicules are diactins. Dermalia and atrialia are hexactins and pentactins. Microscleres are discohexasters, codonhexasters, calycodiscohexasters and graphiocomes. Etymology Feminine gender. Modi fi ed from the latin, ‘Advena’, meaning stranger, foreigner, alien, newcomer, guest, in reference to the sponge shape, which calls to mind aliens from various movies. An ‘h’ was added in ‘Advena’ (Advhena) to distinguish the name from that of the helicarionid gastropod Advena Gude, 1913, in order to make sure there will be no overlapping with valid names. Remarks The new specimen cannot be accommodated in any of the currently accepted genera in the subfamily (Table 2). It is clearly a long stalked Bolosominae individuum, with diactins as the main spicules, plus hexactins and pentactins. It is distinguished from other Bolosominae by the set of microscleres present, namely discasters, discohexasters, codonhexasters and derivatives, calycocomes, and graphiocomes, which render it unique among bolosomines, and justi fi es the proposal of a new genus.
description: Published as part of Castello-Branco, Cristiana, Collins, Allen G. & Hajdu, Eduardo, 2020, A collection of hexactinellids (Porifera) from the deep South Atlantic and North Pacific: new genus, new species and new records, pp. e 9431 in PeerJ 8 on page 13, DOI: 10.7717/peerj.9431, http://zenodo.org/record/4624210
The flat entropy profile at the outskirts of the Abell 2244 galaxy cluster
Creators: name: Andreon, S.
name: Moretti, A.
name: Bohringer, H.
name: Castagna, F.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Entropy is an advantageous diagnostics to study the thermodynamic history of the intracluster plasma of galaxy clusters. We present the entropy profile of the Abell 2244 galaxy cluster derived both exclusively using X-ray data from the low-background Swift XRT telescope and also using Planck y data. The entropy profile derivation using X-rays only is robust at least to the virial radius because the cluster brightness is large compared to the X-ray background at low energies, temperature is strongly bounded by the lack of cluster X-ray photons at energies kT>3 keV, and the XRT background is low, stable and understood. In the observed solid angle, about one quadrant, the entropy radial profile deviates from a power-law at the virial radius, mainly because of a sharp drop of the cluster temperature. This bending of the entropy profile is confirmed when X-ray spectral information is replaced by the Compton map. Clumping and non-thermal pressure support are insufficient to restore a power law entropy profile because they are bound to be small by: a) the agreement between mass estimates from different tracers (gas and galaxies), b) the agreement between entropy profile determinations based on combinations of observables with different sensitivities and systematics, and c) the low value of clumping as estimated using the azimuthal scatter and the gas fraction. Based on numerical simulations, ion-electron equilibration is also insufficient to restore a linear entropy profile. Therefore, the bending of the entropy profiles seems to be robustly derived and witnesses the teoretically-predicted decrease in the inflow through the virial boundary.
description: MNRAS, in press
ASTE observations in the 345 GHz window towards the HII region N113 of the Large Magellanic Cloud
Creators: name: Paron, S.
name: Ortega, M. E.
name: Cunningham, M.
name: Jones, P. A.
name: Rubio, M.
name: Fariña, C.
name: Komugi, S.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: N113 is an HII region located in the central part of the Large Magellanic Cloud (LMC) with an associated molecular cloud very rich in molecular species. Most of the previously observed molecular lines cover the frequency range 85-270 GHz. Thus, a survey and study of lines at the 345 GHz window is required in order to have a more complete understanding of the chemistry and excitation conditions of the region. We mapped a region of 2.5' x 2.5' centered at N113 using the Atacama Submillimeter Telescope Experiment in the 13CO J=3-2 line with an angular and spectral resolution of 22" and 0.11 km/s, respectively. In addition, we observed 16 molecular lines as single pointings towards its center. For the molecular cloud associated with N113, from the 13CO J=3-2 map we estimate LTE and virial masses of about 1x10^4 and 4.5x10^4 M_sun, respectively. Additionally, from the dust continuum emission at 500 micron we obtain a mass of gas of 7x10^3 M_sun. Towards the cloud center we detected emission from: 12CO, 13CO, C18O (3-2), HCN, HNC, HCO+, C2H (4-3), and CS (7-6); being the first reported detection of HCN, HNC, and C2H (4-3) lines from this region. The CS (7-6) which was previously tentatively detected is confirmed in this study. By analyzing the HCN, HNC, and C2H, we suggest that their emission may arise from a photodissociation region (PDR). Moreover, we suggest that the chemistry involving the C2H in N113 can be similar to that in Galactic PDRs. Using the HCN J=4-3, J=3-2, and J=1-0 lines in a RADEX analysis we conclude that we are observing very high density gas, between some 10^5 and 10^7 cm-3.
description: accepted for publication in A&A, September 9, 2014
Measured Spin-Orbit Alignment of Ultra-Short Period Super-Earth 55 Cancri e
Creators: name: Zhao, Lily L.
name: Kunovac, Vedad
name: Brewer, John M.
name: Llama, Joe
name: Millholland, Sarah C.
name: Hedges, Christina
name: Szymkowiak, Andrew E.
name: Roettenbacher, Rachael M.
name: Cabot, Samuel H. C.
name: Weiss, Sam A.
name: Fischer, Debra A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: A planet's orbital alignment places important constraints on how a planet formed and consequently evolved. The dominant formation pathway of ultra-short period planets ($P<1$ day) is particularly mysterious as such planets most likely formed further out, and it is not well understood what drove their migration inwards to their current positions. Measuring the orbital alignment is difficult for smaller super-Earth/sub-Neptune planets, which give rise to smaller amplitude signals. Here we present radial velocities across two transits of 55 Cancri e, an ultra-short period Super-Earth, observed with the Extreme Precision Spectrograph (EXPRES). Using the classical Rossiter-McLaughlin (RM) method, we measure 55 Cnc e's sky-projected stellar spin-orbit alignment (i.e., the projected angle between the planet's orbital axis and its host star's spin axis) to be $λ=10\substack{+17\\ -20}^{\circ}$ with an unprojected angle of $ψ=23\substack{+14\\ -12}^{\circ}$. The best-fit RM model to the EXPRES data has a radial velocity semi-amplitude of just $0.41\substack{+0.09\\ -0.10} m s^{-1}$. The spin-orbit alignment of 55 Cnc e favors dynamically gentle migration theories for ultra-short period planets, namely tidal dissipation through low-eccentricity planet-planet interactions and/or planetary obliquity tides.
description: 12 pages, 4 figures, published in Nature Astronomy