cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Αλληλεπίδραση μεταξύ των μεταλλικών ή ετεροδυναμικών διεπιφανειών και των σφαλμάτων σε ημιαγωγούς ευρέως φάσματος
Creators: name: Πεχλιβάνη, Ελευθερία-Μαρία
Publisher: name: Aristotle University of Thessaloniki
Year: 2008
Subjects: Διεπιφάνειες
Ημιαγωγοί
Νιτρίδια
Υπεριώδης ακτινοβολία
Σφάλματα διεπιφάνειας
Ηλεκτρονικό μικροσκόπιο διερχόμενης δέσμης
Interfaces
Semiconductors
Nitrides
Ultraviolet
Deffects idbs
TEM

description: Συμμετέχοντας από τις 1/10/2008-31/03/2008 στο Ευρωπαικό πρόγραμμα με θέμα « Αλληλεπίδραση μεταξύ των Μεταλλικών ή Ετεροδομικών 1ιεπιφανειών και των Σφαλμάτων σε Ημιαγωγούς Ευρέως Φάσματος», μελετήσαμε με τη βοήθεια της ηλεκτρονικής μικροσκοπίας διερχόμενης δέσμης επιταξιακά υμένια GaN και AlGaN, που αναπτύχθηκαν πάνω σε υπόστρωμα Al2O3 , υπό διαφορετική στοιχειομετρία. Τα δείγματά μας ήταν πέντε: το Χ 631, Χ 633, Χ635, Χ 636 και το Χ638. Στόχος μας ήταν να διαπιστώσουμε αν τα υλικά είναι ομογενή, να μετρήσουμε το πάχος του buffer layer (GaN ή AlN) που εμφανίζεται στο κάθε δείγμα και να το συγκρίνουμε με τη τιμή που μας έδιναν οι επιστήμονες που το ανέπτυξαν στη Γαλλία. Ακόμα, να βρούμε το είδος των σφαλμάτων και να υπολογίσουμε τη πυκνότητα που παρουσιάζουν. Τα αποτελέσματα από τη μελέτη έδειξαν ότι τα υλικά μας ήταν ομογενή, το πάχος των buffer layers συνέπιπτε με αυτό των κατασκευαστών, το είδος των σφαλμάτων αναδείχθηκε σε IDBs και η πυκνότητα σφαλμάτων IDBs παρουσιάστηκε μικρότερη στο δείγμα Χ 635, ύστερα από μελέτη σε εκτεταμένη περιοχή του δείγματος.
description: We have investigated the formation of inversion domain boundaries (IDBs) and their density in one GaN and four AlGaN layers, which were grown on sapphire substrates, in different compositions using transmission electron microscopy (TEM). We found that the density of IDBs in Al0.23 Ga0.77 N appeared smaller than the other four samples, which have shown similar density. In addition, all samples found to be homogeneous and their compined buffer layers GaN or AlN measured as the value that growthers given.
description: Σε συνεργασία με το Ινστιτούτο Τεχνολογίας Γκρενόμπλ (Γαλλία), το ΕΚΕΦΕ Δημόκριτος, και το CNRS (Centre National de la Researche Scientifique, Γαλλία)
Magnetospheres of Terrestrial Exoplanets and Exomoons: Implications for Habitability and Detection
Creators: name: Green, James
name: Boardsen, Scott
name: Dong, Chuanfei
Publisher: name: arXiv
Year: 2020
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: Characterizing habitable exoplanets and/or their moons is of paramount importance. Here we show the results of our magnetic field topological modeling which demonstrate that terrestrial exoplanet-exomoon coupled magnetospheres work together to protect the early atmospheres of both the exoplanet and the exomoon. When exomoon magnetospheres are within the exoplanet's magnetospheric cavity, the exomoon magnetosphere acts like a protective magnetic bubble providing an additional magnetopause confronting the stellar winds when the moon is on the dayside. In addition, magnetic reconnection would create a critical pathway for the atmosphere exchange between the early exoplanet and exomoon. When the exomoon's magnetosphere is outside of the exoplanet's magnetosphere it then becomes the first line of defense against strong stellar winds, reducing the exoplanet's atmospheric loss to space. A brief discussion is given on how this type of exomoon would modify radio emissions from magnetized exoplanets.
description: submitted to ApJ Letters
Μορφολογική ανάλυση των ιδιωμάτων των χωρίων Ματάν και Ανκαβάν
Creators: name: Hodgson, Katherine Jeremy
Publisher: name: Aristotle University of Thessaloniki
Year: 2008
Subjects: subject: Γλωσσολογία
subject: Νεοελληνική διαλεκτολογία
subject: Ποντιακή διάλεκτος
subject: Μορφολογία
subject: Linguistics
subject: FOS: Languages and literature
subject: Modern greek dialects
subject: Pontic dialect
subject: Morphology

description: Μορφολογική ανάλυση του ρήματος, της αντωνυμίας και του ονόματος στα ποντιακά ιδιώματα που μιλιούνται στα χωριά Ματάν και Ανκαβάν της Αρμενίας
description: Morphological analysis of the verb, the pronoun and the noun and adjective in the pontiac dialects spoken in the villages Mactan and Hankavan, Armenia
Spin dynamics and spin freezing behavior in the two-dimensional antiferromagnet NiGa$_{2}$S$_{4}$ revealed by Ga-NMR, NQR and $μ$SR measurements
Creators: name: Takeya, H.
name: Ishida, K.
name: Kitagawa, K.
name: Ihara, Y.
name: Onuma, K.
name: Maeno, Y.
name: Nambu, Y.
name: Nakatsuji, S.
name: MacLaughlin, D. E.
name: Koda, A.
name: Kadono, R.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We have performed $^{69,71}$Ga nuclear magnetic resonance (NMR) and nuclear quadrupole resonance (NQR) and muon spin rotation/resonance on the quasi two-dimensional antiferromagnet (AFM) NiGa$_2$S$_4$, in order to investigate its spin dynamics and magnetic state at low temperatures. Although there exists only one crystallographic site for Ga in NiGa$_2$S$_4$, we found two distinct Ga signals by NMR and NQR. The origin of the two Ga signals is not fully understood, but possibly due to stacking faults along the c axis which induce additional broad Ga NMR and NQR signals with different local symmetries. We found the novel spin freezing occurring at $T_{\rm f}$, at which the specific heat shows a maximum, from a clear divergent behavior of the nuclear spin-lattice relaxation rate $1/T_{1}$ and nuclear spin-spin relaxation rate $1/T_{2}$ measured by Ga-NQR as well as the muon spin relaxation rate $λ$. The main sharp NQR peaks exhibit a stronger tendency of divergence, compared with the weak broader spectral peaks, indicating that the spin freezing is intrinsic in NiGa$_2$S$_4$. The behavior of these relaxation rates strongly suggests that the Ni spin fluctuations slow down towards $T_{\rm f}$, and the temperature range of the divergence is anomalously wider than that in a conventional magnetic ordering. A broad structureless spectrum and multi-component $T_1$ were observed below 2 K, indicating that a static magnetic state with incommensurate magnetic correlations or inhomogeneously distributed moments is realized at low temperatures. However, the wide temperature region between 2 K and $T_{\rm f}$, where the NQR signal was not observed, suggests that the Ni spins do not freeze immediately below $T_{\rm f}$, but keep fluctuating down to 2 K with the MHz frequency range.
description: 14 pages, 14 figures. To appear in Phys. Rev. B
Improved fully automated method for the determination of medium to highly polar pesticides in surface and groundwater and application in two distinct agriculture-impacted areas
Creators: name: Barbieri, Maria Vittoria
name: Monllor-Alcaraz, Luis Simon
name: Postigo, Cristina
name: de Alda, Miren Lopez
Publisher: name: arXiv
Year: 2020
Subjects: subject: Other Quantitative Biology (q-bio.OT)
subject: FOS: Biological sciences

description: Water is an essential resource for all living organisms. The continuous and increasing use of pesticides in agricultural and urban activities results in the pollution of water resources and represents an environmental risk. To control and reduce pesticide pollution, reliable multi-residue methods for the detection of these compounds in water are needed. In this context, the present work aimed at providing an analytical method for the simultaneous determination of trace levels of 51 target pesticides in water and applying it to the investigation of target pesticides in two agriculture-impacted areas of interest. The method developed, based on an isotopic dilution approach and on-line solid-phase extraction-liquid chromatography-tandem mass spectrometry, is fast, simple, and to a large extent automated, and allows the analysis of most of the target compounds in compliance with European regulations. Further application of the method to the analysis of selected water samples collected at the lowest stretches of the two largest river basins of Catalonia (NE Spain), Llobregat and Ter, revealed the presence of a wide suite of pesticides, and some of them at concentrations above the water quality standards (irgarol and dichlorvos) or the acceptable method detection limits (methiocarb, imidacloprid, and thiacloprid), in the Llobregat, and much cleaner waters in the Ter River basin. Risk assessment of the pesticide concentrations measured in the Llobregat indicated high risk due to the presence of irgarol, dichlorvos, methiocarb, azinphos ethyl, imidacloprid, and diflufenican (hazard quotient (HQ) values>10), and an only moderate potential risk in the Ter River associated to the occurrence of bentazone and irgarol (HQ>1).
description: Published in Science of the Total Environment
Exciton-Plasmon Coupling in 2D Semiconductors by Surface Acoustic Waves
Creators: name: Fandan, Rajveer
name: Pedrós, Jorge
name: Calle, Fernando
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We theoretically demonstrate the coupling between excitons in 2D semiconductors and surface plasmons in a thin metal film by means of a surface acoustic wave (SAW), proving that the generated exciton-plasmon polaritons (or plexcitons) are in the strong coupling regime. The strain field of the SAW creates a dynamic diffraction grating providing the momentum match for the surface plasmons, whereas the piezoelectric field, that could dissociate the excitons, is cancelled out by the metal. This is exemplified for monolayer MoS$\mathrm{_{2}}$ and mono- and few-layer black phosphorus on top of a thin silver layer on a LiNbO$\mathrm{_{3}}$ piezoelectric substrate, providing Rabi splittings of 100-150 meV. Thus, we demonstrate that SAWs are powerful tools to modulate the optical properties of supported 2D semiconductors by means of the high-frequency localized deformations tailored by the acoustic transducers, that can serve as electrically switchable launchers of propagating plexcitons suitable for active high-speed nanophotonic applications.
description: 20 pages, 5 figures, and TOC graphic
Ανασφάλεια εργασίας (job insecurity), ικανοποίηση από την εργασία (satisfaction) και οργανωσιακή δέσμευση (commitment)
Creators: name: Ματθαίος, Χρυσοβαλάντης Κωνσταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2008
Subjects: Ανασφάλεια εργασίας
Ικανοποίηση από εργασία
Οργανωσιακή δέσμευση
Πρωτοβάθμια εκπαίδευση
Job insecurity
Job satisfaction
Organizational commitment
Elementary school

description: Η παρούσα εργασία αποσκοπεί στη διερεύνηση της σχέσης ανάμεσα στις διάφορες διαστάσεις της ικανοποίησης από την εργασία (πληρωμή, προαγωγή, εποπτεία, συνθήκες εργασίας και οργανισμός ως σύνολο), της ανασφάλειας και της οργανωσιακής δέσμευσης σε σχέση με την πλήρη απασχόληση (διορισμένος/η) και την πλέον εφαρμοσμένη των ευέλικτων μορφών απασχόλησης, των αναπληρωτών και ωρομισθίων. Τα στοιχεία της εργασίας προέρχονται από εμπειρική έρευνα που έλαβε χώρα στις σχολικές μονάδες της Πρωτοβάθμιας Εκπαίδευσης Σερρών. Η εργασία επίσης στοχεύει να απαντήσει και στα ακόλουθα ερευνητικά ερωτήματα: • Είναι οι Έλληνες εκπαιδευτικοί ικανοποιημένοι από την εργασία τους ; • Το αίσθημα της ανασφάλειας κατατρέχει τους εκπαιδευτικούς; • Υπάρχει η έννοια της οργανωσιακής δέσμευσης στη σχέση των εκπαιδευτικών με τη Σχολική Μονάδα, όπου εργάζονται; • Είναι οι βασικές μεταβλητές των εννοιών προς μελέτη (εργασιακή ικανοποίηση, εργασιακή ασφάλεια και οργανωσιακή δέσμευση) άμεσα και ισχυρά συσχετιζόμενες ;
description: This research aims in the investigation of the job satisfaction dimensions (payment, promotion, monitoring, work conditions and organism as total), the job insecurity and the organizational commitment, regarding the appointed and the flexible forms of employment (assistants and time worker). This empiric research took place in Elementary Schools in Serres. Its main goal is to answer in the following inquiring questions: • Are the Greek educators satisfied from their work? • Do teachers feel job insecurity? • Do teachers feel organizational committed? • Are the main variables (job satisfaction, job insecurity and organizational commitment) immediately and powerfully connected?
Surfaces in ${\mathbb R}^{N^2-1}$ based on harmonic maps $S^2\to CP^{N-1}$
Creators: name: Zakrzewski, W. J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 03.65.Fd, 02.20.--a, 42.50Ar

description: We show that many surfaces in $\R^{N^2-1}$ can be generated by harmonic maps of $S^2\to CP^{N-1}$. These surfaces are based on the projectors in $CP^{N-1}$ which describe maps of $S^2\to CP^{N-1}$. In the case when these maps form the Veronese sequence all the surfaces have constant curvature.
description: 9 pages
Additional file 1 of The intention of Egyptian healthcare workers to take the monkeypox vaccine: is urgent action required?
Creators: name: Ghazy, Ramy Mohamed
name: Hussein, Mai
name: Abdu, Shymaa Mamdouh Mohamed
name: El-sayed Ellakwa, Doha
name: Tolba, Mahmoud M.
name: Youssef, Naglaa
name: Mahboob, Amira Saad
name: Abd ElHafeez, Samar
Publisher: name: figshare
Year: 2024
Subjects: subject: Medicine
subject: Cell Biology
subject: Biotechnology
subject: Immunology
subject: FOS: Clinical medicine
subject: Biological Sciences not elsewhere classified
subject: Cancer
subject: Science Policy
subject: Infectious Diseases
subject: FOS: Health sciences

description: Supplementary Material 1.
MLOD: Awareness of Extrinsic Perturbation in Multi-LiDAR 3D Object Detection for Autonomous Driving
Creators: name: Jiao, Jianhao
name: Yun, Peng
name: Tai, Lei
name: Liu, Ming
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: Extrinsic perturbation always exists in multiple sensors. In this paper, we focus on the extrinsic uncertainty in multi-LiDAR systems for 3D object detection. We first analyze the influence of extrinsic perturbation on geometric tasks with two basic examples. To minimize the detrimental effect of extrinsic perturbation, we propagate an uncertainty prior on each point of input point clouds, and use this information to boost an approach for 3D geometric tasks. Then we extend our findings to propose a multi-LiDAR 3D object detector called MLOD. MLOD is a two-stage network where the multi-LiDAR information is fused through various schemes in stage one, and the extrinsic perturbation is handled in stage two. We conduct extensive experiments on a real-world dataset, and demonstrate both the accuracy and robustness improvement of MLOD. The code, data and supplementary materials are available at: https://ram-lab.com/file/site/mlod
description: 8 pages, 6 figures
Διερεύνηση της συμπεριφοράς των οδηγών ΙΧ αυτοκινήτων σε συνθήκες μεγάλου κυκλοφοριακού φόρτου, υψηλών ταχυτήτων και χαμηλού επιπέδου εξυπηρέτησης
Creators: name: Γελαράκη, Στεφανία Κωναταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2008
Subjects: Συμπεριφορά οδηγών
Αντίληψη επικινδυνότητας
Driver's behaviour
Risk perception

description: H παρούσα εργασία έχει ως σκοπό τη διερεύνηση της συμπεριφοράς έμπειρων και άπειρων οδγηών σε συνθήκες οδήγησης σε δρόμο ταχείας κυκλοφορίας, ο οποίος λόγω της αυξημένης κίνησης και του λανθασμένου σχεδιασμού, ενέχει κινδύνους, προσφέρει χαμηλό επίπεδο εξυπηρέτησης και καθιστά την οδήγηση μια αγχώδη διαδικασία. Για να γίνει η εκτίμηση του άγχους αυτού, μετρήθηκε με τη βοήθεια κατάλληλων οργάνων η ταχύτητα και η επιτάχυνση ορισμένων οδηγών-δειγμάτων και στη συνέχεια καταστρώθηκαν διαγράμματα, τα οποία μετά από προσεχτική παρατήρηση κατέγραψαν τη συμπεριφορά των οδηγών και σύγκριναν μεταξύ τους παράγοντες, που μπορεί να επηρεάσουν την ίδια, καθώς και την αντίληψη επικινδυνότητας των οδηγών, στο συγκεκριμένο υπό μελέτη επιλεγμένο τμήμα οδού
description: The following paper intends to research the behavior of experienced and non-experienced drivers in high-way driving circumstances, where, due to intense traffic and wrong designing, the level of the provided service is low and the driving task becomes a stressful procedure. In order to estimate the amount of this stress, velocity and acceleration of the sample-drivers were measured with the help of specialized instruments and the charts, that were the results of the selected data, gave information about the driver’s behavior, after careful observation. In addition, different factors, that may be able to affect risk perception and driver’s behavior itself, were compared on the segment of the selected high way.
A direct consequence of the expansion of space?
Creators: name: Chodorowski, Michal
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Consider radar ranging of a distant galaxy in a Friedman-Lemaitre cosmological model. In this model the comoving coordinate of the galaxy is constant, hence the equations of null geodesics for photons travelling to the distant galaxy and back imply the following equation: \int_{t_e}^{t_r} dt/a(t) = \int_{t_r}^{t_o} dt/a(t). Here, t_e, t_r and t_o are respectively the times of emission, reflection and observation of the reflected photons, and a(t) is the scale factor. Since the universe is expanding, a(t) is a monotonically increasing function, so the return travel time, t_o - t_r, must be greater than the forward travel time, t_r - t_e. Clearly, space expands, and on their way back, the photons must travel a longer distance! The present paper explains why this argument for the expansion of space is wrong. We argue that, unlike the expansion of the cosmic substratum, the expansion of space is unobservable. We therefore propose to apply to it -- just like to the ether -- Ockham's razor.
description: 6 MN-style pages, no figures; matches the version accepted for publication in MNRAS
School District Leadership Strategies for Technology Integration Efforts to Support Innovation and Student Learning
Creators: name: Beckley, Brian Jay
Publisher: name: Washington State University
Year: 2024
Subjects: Innovation and student learning
Integrating Technology
School district leadership

description: Throughout the United States, school districts are rapidly shifting their use of technology in the classroom to address the educational disparities with academic achievement, inequitable access, and promote personalized learning experiences for students. This has an impact on school district leaders as it requires them to become effective users, supporters, and planners of technology. A better understanding of school district leadership practices and organizational systems to support technology integration in the classroom for student learning will assist others in leadership positions on how to effectively manage and lead for change in their own district. Using a descriptive qualitative method and semi-structured interviews with superintendents in nine Washington state districts of varied sizes, demographic, and geographic locations, this research aims to examine leaders’ perceptions of technology integration and their leadership role.
Gravity dual of conformal matter collisions in 1+1 dimensions
Creators: name: Kajantie, K.
name: Louko, Jorma
name: Tahkokallio, T.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We find the three-dimensional gravity dual of a process in which two clouds of (1+1)-dimensional conformal matter moving in opposite directions collide. This gives the most general conformally invariant holographic flow in the 1+1 dimensional boundary theory in terms of two arbitrary functions. With a suitable choice of the arbitrary functions the process can be interpreted as an opaque collision of two extended systems with central, fragmentation and interaction regions. Comparison with classical gluon field calculations relates the size of the system with the saturation scale.
description: 19 pages, 5 figures, three references added, text modified accordingly, typos corrected
Supersymmetric Form of the String Action in the Presence of the Gauge Field
Creators: name: Kamani, Davoud
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this manuscript we study the superstring theory with an Abelian worldsheet gauge field. The components of the gauge field appear as a space and a time coordinates. We call them "fictitious coordinates". The worldsheet supersymmetry and the Poincaré symmetry of this model will be analyzed. The $T$-duality and quantization of the two fictitious coordinates are also obtained.
description: 14 pages, Latex, no figure, corrected version
Inconsistencies arising from the coupling of galaxy formation sub-grid models to Pressure-Smoothed Particle Hydrodynamics
Creators: name: Borrow, Josh
name: Schaller, Matthieu
name: Bower, Richard G.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Smoothed Particle Hydrodynamics (SPH) is a Lagrangian method for solving the fluid equations that is commonplace in astrophysics, prized for its natural adaptivity and stability. The choice of variable to smooth in SPH has been the topic of contention, with smoothed pressure (P-SPH) being introduced to reduce errors at contact discontinuities relative to smoothed density schemes. Smoothed pressure schemes produce excellent results in isolated hydrodynamics tests; in more complex situations however, especially when coupling to the `sub-grid' physics and multiple time-stepping used in many state-of-the-art astrophysics simulations, these schemes produce large force errors that can easily evade detection as they do not manifest as energy non-conservation. Here two scenarios are evaluated: the injection of energy into the fluid (common for stellar feedback) and radiative cooling. In the former scenario, force and energy conservation errors manifest (of the same order as the injected energy), and in the latter large force errors that change rapidly over a few timesteps lead to instability in the fluid (of the same order as the energy lost to cooling). Potential ways to remedy these issues are explored with solutions generally leading to large increases in computational cost. Schemes using a Density-based formulation do not create these instabilities and as such it is recommended that they are preferred over Pressure-based solutions when combined with an energy diffusion term to reduce errors at contact discontinuities.
description: Submitted to MNRAS; comments to be sent to joshua.borrow@durham.ac.uk
Quantum Tunneling and Back Reaction
Creators: name: Banerjee, Rabin
name: Majhi, Bibhas Ranjan
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We give a correction to the tunneling probability by taking into account the back reaction effect to the metric of the black hole spacetime. We then show how this gives rise to the modifications in the semiclassical black hole entropy and Hawking temperature. Finally, we reproduce the familiar logarithmic correction to the Bekenstein-Hawking area law.
description: LaTex, 6 pages, no figures, minor changes, references added, to appear in Phys. Lett. B
Using Conditional Generative Adversarial Networks to Reduce the Effects of Latency in Robotic Telesurgery
Creators: name: Sachdeva, Neil
name: Klopukh, Misha
name: Clair, Rachel St.
name: Hahn, William
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Artificial Intelligence (cs.AI)
subject: Robotics (cs.RO)
subject: Image and Video Processing (eess.IV)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: I.4.6; I.2.6; J.3

description: The introduction of surgical robots brought about advancements in surgical procedures. The applications of remote telesurgery range from building medical clinics in underprivileged areas, to placing robots abroad in military hot-spots where accessibility and diversity of medical experience may be limited. Poor wireless connectivity may result in a prolonged delay, referred to as latency, between a surgeon's input and action a robot takes. In surgery, any micro-delay can injure a patient severely and in some cases, result in fatality. One was to increase safety is to mitigate the effects of latency using deep learning aided computer vision. While the current surgical robots use calibrated sensors to measure the position of the arms and tools, in this work we present a purely optical approach that provides a measurement of the tool position in relation to the patient's tissues. This research aimed to produce a neural network that allowed a robot to detect its own mechanical manipulator arms. A conditional generative adversarial networks (cGAN) was trained on 1107 frames of mock gastrointestinal robotic surgery data from the 2015 EndoVis Instrument Challenge and corresponding hand-drawn labels for each frame. When run on new testing data, the network generated near-perfect labels of the input images which were visually consistent with the hand-drawn labels and was able to do this in 299 milliseconds. These accurately generated labels can then be used as simplified identifiers for the robot to track its own controlled tools. These results show potential for conditional GANs as a reaction mechanism such that the robot can detect when its arms move outside the operating area within a patient. This system allows for more accurate monitoring of the position of surgical instruments in relation to the patient's tissue, increasing safety measures that are integral to successful telesurgery systems.
description: 6 pages with 5 figures and 1 table. J Robotic Surg (2020)
title: Uptake of tire-derived compounds in lettuce under realistic agricultural growing conditions
Creators: name: Hämmerle, Luzian Elijah
Year: 2025

description: Der durch den Klimawandel verschärfte Wassermangel hat zu einer verstärkten Nutzung von behandeltem Abwasser (TWW) zur Bewässerung geführt, wodurch neuartige Schadstoffe (CECs) in landwirtschaftliche Systeme eingebracht werden. Diese Arbeit untersucht das Verhalten und die Aufnahme von Reifenabriebverbindungen (TWCs) in Pflanzen, die unter realistischen landwirtschaftlichen Bedingungen angebaut werden, mit besonderem Fokus auf deren potenziellen Eintritt in die menschliche Nahrungskette. In einem Gewächshausversuch wurden Salatpflanzen in Böden mit unterschiedlichem Lehmgehalt kultiviert und mit TWC-angereichertem Wasser bewässert. Die Ergebnisse zeigen, dass Bodeneigenschaften die Bioverfügbarkeit und Aufnahme von TWCs erheblich beeinflussen, wobei ein höherer Lehmgehalt die Verfügbarkeit verringert. Eine Untersuchung von Blattgemüse aus Supermärkten und landwirtschaftlichen Feldern belegt zudem die Präsenz von TWCs in erwerblichen Lebensmitteln. Die Ergebnisse zeigen, dass die Aufnahme von TWCs durch verbindungsspezifische Eigenschaften und Verfügbarkeit im Boden bestimmt wird. Diese Forschung trägt zum Verständnis des Umweltverhaltens von TWCs bei und liefert wichtige Erkenntnisse für eine sicherere Wiederverwendung von behandeltem Abwasser.
description: Water scarcity exacerbated by climate change has led to an increased reliance on treated wastewater (TWW) for irrigation, introducing contaminants of emerging concern (CECs) into agricultural systems. This thesis investigates the behaviour and uptake of tire wear compounds (TWCs) in leafy crops grown under realistic agricultural conditions, focusing on their potential to enter the human food chain. A greenhouse experiment was conducted using lettuce plants grown in soils with varying clay content, irrigated with TWC-spiked water. Results show that soil properties influence TWC bioavailability and plant uptake, with higher clay content reducing accessibility. Additionally, a detection study of leafy greens from supermarkets and agricultural fields highlights the presence of TWCs in commercial produce. Findings demonstrate that plant uptake is governed by compound-specific properties and accessibility in soil. This research contributes to understanding the environmental fate of TWCs and informs strategies for safer reuse of treated wastewater.
Optical and thermodynamic properties of the high-temperature superconductor HgBa_2CuO_4+delta
Creators: name: van Heumen, E.
name: Lortz, R.
name: Kuzmenko, A. B.
name: Carbone, F.
name: van der Marel, D.
name: Zhao, X.
name: Yu, G.
name: Cho, Y.
name: Barisic, N.
name: Greven, M.
name: Homes, C. C.
name: Dordevic, S. V.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: In- and out-of-plane optical spectra and specific heat measurements for the single layer cuprate superconductor Hg-1201 at optimal doping (Tc = 97 K) are presented. Both the in-plane and out-of-plane superfluid density agree well with a recently proposed scaling relation rho_{s}=sigma_{dc}T_{c}. It is shown that there is a superconductivity induced increase of the in-plane low frequency spectral weight which follows the trend found in underdoped and optimally doped Bi-2212 and optimally doped Bi-2223. We observe an increase of optical spectral weight which corresponds to a change in kinetic energy of approximately 0.5 meV/Cu which is more than enough to explain the condensation energy. The specific heat anomaly is 10 times smaller than in YBCO and 3 times smaller than in Bi-2212. The shape of the anomaly is similar to the one observed in YBCO showing that the superconducting transition is governed by thermal fluctuations.
description: 11 pages, 13 figures
Measuring the vertical response of the Galactic disc to an infalling satellite
Creators: name: Poggio, Eloisa
name: Laporte, Chervin F. P.
name: Johnston, Kathryn V.
name: D'Onghia, Elena
name: Drimmel, Ronald
name: Filho, Douglas Grion
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Using N-body simulations of the Milky Way interacting with a satellite similar to the Sagittarius dwarf galaxy, we quantitatively analyse the vertical response of the Galactic disc to the satellite's repeated impacts. We approximate the vertical distortion of the Galactic disc as the sum of the first three Fourier azimuthal terms m = 0, 1 and 2, and observe their evolution in different dynamical regimes of interaction. After the first interaction, the m=0 term manifests itself as outgoing ring-like vertical distortions. The m=1 term (S-shape warp) is prograde when the impacts of the satellite are more frequent, or in general close to an interaction, whereas it is slowly retrograde in the most quiescent phases. The m=2 term is typically prograde, and close to an interaction it couples with the m=1 term. Finally, we find that the vertical response of the disc can be recovered in an unbiased way using the instantaneous positions and velocities of stars in a limited volume of the Galactic disc, analogous to real data, and that the measured vertical pattern speeds have a constraining power in the context of a Milky Way-satellite interaction.
description: 24 pages, 21 Figures. Submitted to MNRAS. We welcome comments, questions, suggestions for missing references, etc
Additional file 1 of The efficacy of different biomarkers and endpoints to refine referrals for suspected prostate cancer: the TARGET study (Tiered integrAted tests for eaRly diaGnosis of clinically significant ProstatE Tumours)
Creators: name: Lophatananon, Artitaya
name: Muir, Kenneth R.
name: Gnanapragasam, Vincent J.
Publisher: name: figshare
Year: 2024
Subjects: Medicine
Cell Biology
Biotechnology
Mathematical Sciences not elsewhere classified
Cancer
Mental Health

description: Additional File. Table S1. Additional value of individual test to improve AUC Base performance for detection of any cancer. A. Base model is pre-MRI standard of care including PSA, age. B. Base model with post-MRI standard of care including PSA, age, MRI and biopsy of Likert 3-5. All p value are comparisons against the base models. PRS- polygenic risk score FTPSA- Free to total PSA PSAd- PSA density, phi -Prostate Health Index.
Searches after Gravitational Waves Using ARizona Observatories (SAGUARO): Observations and Analysis from Advanced LIGO/Virgo's Third Observing Run
Creators: name: Paterson, K.
name: Lundquist, M. J.
name: Rastinejad, J. C.
name: Fong, W.
name: Sand, D. J.
name: Andrews, J. E.
name: Amaro, R. C.
name: Eskandari, O.
name: Wyatt, S.
name: Daly, P. N.
name: Bradley, H.
name: Zhou-Wright, S.
name: Valenti, S.
name: Yang, S.
name: Christensen, E.
name: Gibbs, A. R.
name: Shelly, F.
name: Bilinski, C.
name: Chomiuk, L.
name: Corsi, A.
name: Drout, M. R.
name: Foley, R. J.
name: Gabor, P.
name: Garnavich, P.
name: Grier, C. J.
name: Hamden, E.
name: Krantz, H.
name: Olszewski, E.
name: Paschalidis, V.
name: Reichart, D.
name: Rest, A.
name: Smith, N.
name: Strader, J.
name: Trilling, D.
name: Veillet, C.
name: Wagner, R. M.
name: Zabludoff, A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: With the conclusion of the third observing run for Advanced LIGO/Virgo (O3), we present a detailed analysis of both triggered and serendipitous observations of 17 gravitational wave (GW) events (7 triggered and 10 purely serendipitous) from the Searches After Gravitational-waves Using ARizona Observatories (SAGUARO) program. We searched a total of 4935 deg$^2$ down to a median 5$σ$ transient detection depth of 21.1 AB mag using the Mt Lemmon 1.5 m telescope, the discovery engine for SAGUARO. In addition to triggered events within 24~hours, our transient search encompassed a time interval following GW events of $<120$~hrs, providing observations on $\sim$ 1/2 of the events accessible to the Mt Lemmon 1.5 m telescope. We covered 2.1--86\% of the LVC total probability ($P_{\rm total}$) for individual events, with a median $P_{\rm total} \approx 8\%$ within $<120$~hours. Following improvements to our pipeline and the addition of serendipitous observations, we find a total of 7 new optical candidates across 5 GW events which we are unable to rule out after searching for additional information and comparing to kilonova models. Using both publicly available and our own late-time data, we investigated a total of 252 optical candidates for these 17 events, finding only 65\% were followed up in some capacity by the community. Of the total 252 candidates, we are able to rule out an additional 12 previously reported counterpart candidates. In light of these results, we discuss lessons learned from the SAGUARO GW counterpart search. We discuss how community coordination of observations and candidate follow-up, as well as the role of archival data, are crucial to improving the efficiency of follow-up efforts and preventing unnecessary duplication of effort with limited EM resources.
description: 44 pages, 21 figures, 2 tables, submitted to ApJ
Elicitation of agreement morphology
Creators: name: Parker, Verdena
name: Escamilla, Ramón
name: Newbold, Lindsey
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2022
Subjects: subject: hup

description: Audio file VP-080809-07: Elicitation of third-person vs. fourth-person agreement morphology, based on a handout from a presentation by Victor Golla at the 2009 Athabaskan Languages Conference at UC Berkeley.
Dark Energy-Dark Matter Interaction from the Abell Cluster A586
Creators: name: Bertolami, Orfeu
name: Pedro, Francisco Gil
name: Delliou, Morgan Le
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We find that deviation from the virial equilibrium of the Abell Cluster A586 yields evidence of the interaction between dark matter and dark energy. We argue that this interaction might imply a violation of the Equivalence Principle. Our analysis show that evidence is found in the context of two different models of dark energy-dark matter interaction.
description: Talk presented by O.B. at Encuentros Relativistas Espanoles 2007, Puerto de la Cruz, Tenerife, Spain, 10-14 September 2007. 6 pages, 3 figures and style file
A fault-tolerant collaborative tools development system
Creators: name: Ko, Miranda W.S.
Publisher: name: University of British Columbia
Year: 2009

description: Collaborative tools (multi-user applications) are very popular. It is desirable to have an application-independent system which provides the basic elements that are necessary for developing any kind of collaborative tools. This thesis presents a system named Collaborative Tools Development System (CTDS) for developing these tools. It not only facilitates the building of collaborative software from stand-alone (single-user) software, but it also eases the development of collaborative software from scratch. CTDS provides the communication and coordination services which are used by collaborative software. CTDS offers fault-tolerant collaboration. Failures of key components in CTDS do not have any impact on collaboration. CTDS also offers many other features for more effective and efficient collaboration.
Inventory [of Rainbow Ranche] taken January 1938
Creators: name: Goldie, James
Publisher: name: The University of British Columbia
Year: 2017

description: Eleven loose pages comprising an inventory of Rainbow Ranche equipment and supplies taken by James Goldie in January, 1938, plus a few notes added as late as August 1945; Inventory categories include orchard equipment, spare parts and supplies, tractor parts, tools, tool house equipment, bunk house equipment, spray machine repair and equipment, grader, packing house, stable and team equipment.
Generalized Hyperbolicity and Shadowing in $L^p$ spaces
Creators: name: D'Aniello, Emma
name: Darji, Udayan B.
name: Maiuriello, Martina
Publisher: name: arXiv
Year: 2020
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: Primary: 37B65, 47B33 Secondary: 37D05, 47A16

description: It is rather well-known that hyperbolic operators have the shadowing property. In the setting of finite dimensional Banach spaces, having the shadowing property is equivalent to being hyperbolic. In 2018, Bernardes et al. constructed an operator with the shadowing property which is not hyperbolic, settling an open question. In the process, they introduced a class of operators which has come to be known as generalized hyperbolic operators. This class of operators seems to be an important bridge between hyperbolicity and the shadowing property. In this article, we show that for a large natural class of operators on $L^p(X)$ the notion of generalized hyperbolicity and the shadowing property coincide. We do this by giving sufficient and necessary conditions for a certain class of operators to have the shadowing property. We also introduce computational tools which allow construction of operators with and without the shadowing property. Utilizing these tools, we show how some natural probability distributions, such as the Laplace distribution and the Cauchy distribution, lead to operators with and without the shadowing property on $L^p(X)$.
Disformal Dark Matter
Creators: name: Brax, Philippe
name: Kaneta, Kunio
name: Mambrini, Yann
name: Pierre, Mathias
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We generalize dark matter production to a two-metric framework whereby the physical metric, which couples to the Standard Model (SM), is conformally and/or disformally related to the metric governing the gravitational dynamics. We show that this setup is naturally present in many Ultra Violet (UV) constructions, from Kähler moduli fields to tensor-portal models, and from emergent gravity to supergravity models. In this setting we study dark matter production in the early Universe resulting from both scatterings off the thermal bath and the radiative decay of the inflaton. We also take into account non-instantaneous reheating effects at the end of inflation. In this context, dark matter emerges from the production of the scalar field mediating the conformal/disformal interactions with the SM, i.e. realising a Feebly Interacting Matter Particle (FIMP) scenario where the suppression scale of the interaction between the scalar and the SM can be taken almost as high as the Planck scale in the deep UV.
description: 14 pages, 7 figures
Quantifying quantum coherence based on the Tsallis relative operator entropy
Creators: name: Guo, Meng-Li
name: Jin, Zhi-Xiang
name: Li, Bo
name: Hu, Bin
name: Fei, Shao-Ming
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Coherence is a fundamental ingredient in quantum physics and a key resource in quantum information processing. The quantification of quantum coherence is of great importance. We present a family of coherence quantifiers based on the Tsallis relative operator entropy. Shannon inequality and its reverse one in Hilbert space operators derived by Furuta [Linear Algebra Appl. 381 (2004) 219] are extended in terms of the parameter of the Tsallis relative operator entropy. These quantifiers are shown to satisfy all the standard criteria for a well-defined measure of coherence and include some existing coherence measures as special cases. Detailed examples are given to show the relations among the measures of quantum coherence.
description: 10 pages, comments are welcome!
De-Gaussification by inconclusive photon subtraction
Creators: name: Olivares, Stefano
name: Paris, Matteo G. A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We address conditional de-Gaussification of continuous variable states by inconclusive photon subtraction (IPS) and review in details its application to bipartite twin-beam state of radiation. The IPS map in the Fock basis has been derived, as well as its counterpart in the phase-space. Teleportation assisted by IPS states is analyzed and the corresponding fidelity evaluated as a function of the involved parameters. Nonlocality of IPS states is investigated by means of different tests including displaced parity, homodyne detection, pseudospin, and displaced on/off photodetection. Dissipation and thermal noise are taken into account, as well as non unit quantum efficiency in the detection stage. We show that the IPS process, for a suitable choice of the involved parameters, improves teleportation fidelity and enhances nonlocal properties.
description: 17 pages, 30 figures
Formation of Massive Star Clusters by Fast HI Gas Collision
Creators: name: Maeda, Ryunosuke
name: Inoue, Tsuyoshi
name: Fukui, Yasuo
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Young massive clusters (YMCs) are dense aggregates of young stars, which are essential to galaxy evolution, owing to their ultraviolet radiation, stellar winds, and supernovae. The typical mass and radius of YMCs are M~10^4 M_sun and R~1 pc, respectively, indicating that many stars are located in a small region. The formation of YMC precursor clouds may be difficult because a very compact massive cloud should be formed before stellar feedback blows off the cloud. Recent observational studies suggest that YMCs can be formed as a consequence of the fast HI gas collision with a velocity of ~100 km s^-1, which is the typical velocity of the galaxy-galaxy interaction. In this study, we examine whether the fast HI gas collision triggers YMC formation using three-dimensional magnetohydrodynamics simulations, which include the effects of self-gravity, radiative cooling/heating, and chemistry. We demonstrate that massive gravitationally bound gas clumps with M >10^4 M_sun and L~4 pc are formed in the shock compressed region induced by the fast HI gas collision, which massive gas clumps can evolve into YMCs. Our results show that the YMC precursors are formed by the global gravitational collapse of molecular clouds, and YMCs can be formed even in low-metal environments, such as the Magellanic Clouds. Additionally, the very massive YMC precursor cloud, with M >10^5 M_sun, can be created when we consider the fast collision of HI clouds, which may explain the origin of the very massive stellar cluster R136 system in the Large Magellanic Cloud.
description: 9 pages, 12 figures, accepted by ApJ
Fülle des Lebens im Zeitalter von HIV/ Aids und wirtschaftlicher Globalisierung
Creators: name: Dube Shomanah, Musa W.
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 53 Nr. 4 (2004): Ökumenische Rundschau, Band 53, Heft 4
Hardy-Lieb-Thirring inequalities for fractional Schroedinger operators
Creators: name: Frank, Rupert L.
name: Lieb, Elliott H.
name: Seiringer, Robert
Publisher: name: arXiv
Year: 2006
Subjects: subject: Spectral Theory (math.SP)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We show that the Lieb-Thirring inequalities on moments of negative eigenvalues of Schroedinger-like operators remain true, with possibly different constants, when the critical Hardy-weight $C|x|^{-2}$ is subtracted from the Laplace operator. We do so by first establishing a Sobolev inequality for such operators. Similar results are true for fractional powers of the Laplacian and the Hardy-weight and, in particular, for relativistic Schroedinger operators. We also allow for the inclusion of magnetic vector potentials. As an application, we extend, for the first time, the proof of stability of relativistic matter with magnetic fields all the way up to the critical value of the nuclear charge $Zα=2/π$.
description: LaTeX2e, 29 pages; corrected version of Lemma 3.3
Dyson-Schwinger approach to pion-nucleon scattering using time-ordered perturbation theory
Creators: name: Blankleider, B.
name: Wray, J. L.
name: Kvinikhidze, A. N.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present a simple description of pion-nucleon ($πN$) scattering taking into account the full complexity of pion absorption and creation on the nucleon. To do this we solve Dyson-Schwinger equations within the framework of Time-Ordered Perturbation Theory. This enables us to construct partial wave separable $ πN$ t matrices that can be useful in models of nuclear processes involving fully dressed nucleons. At the same time, our approach demonstrates features of Quantum Field Theory, like particle dressing, renormalisation, and the use of Dyson-Schwinger equations, in a non-relativistic context that is maximally close to that of Quantum Mechanics. For this reason, this article may also be of pedagogical interest.
description: 9 pages, 5 figures
Nonlinear localized modes at phase-slip defects in waveguide arrays
Creators: name: Molina, Mario I.
name: Kivshar, Yuri S.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: We study light localization at a phase-slip defect created by two semi-infinite mismatched identical arrays of coupled optical waveguides. We demonstrate that the nonlinear defect modes possess the specific properties of both nonlinear surface modes and discrete solitons. We analyze stability of the localized modes and their generation in both linear and nonlinear regimes.
description: 3 pages, 6 figures, submitted to Opt. Lett