cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
An extended star cluster at the outer edge of the spiral galaxy M33
Creators: name: Stonkute, Rima
name: Vansevicius, Vladas
name: Arimoto, Nobuo
name: Hasegawa, Takashi
name: Narbutis, Donatas
name: Tamura, Naoyuki
name: Jablonka, Pascale
name: Ohta, Kouji
name: Yamada, Yoshihiko
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report a discovery of an extended globular-like star cluster, M33-EC1, at the outer edge of the spiral galaxy M33. The distance to the cluster is 890 kpc, and it lies at a 12.5 kpc projected distance from the center of M33. Old age (>~7 Gyr) and low metallicity ([M/H]
description: 20 pages, 6 figures, 2 tables, accepted for publication in AJ
Constraining the entropy of formation from young transiting planets
Creators: name: Owen, James E.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Recently K2 and TESS have discovered transiting planets with radii between $\sim$ 5-10 R$_\oplus$ around stars with ages $<100$ Myr. These young planets are likely to be the progenitors of the ubiquitous super-earths/sub-neptunes, that are well studied around stars with ages $\gtrsim 1$ Gyr. The formation and early evolution of super-earths/sub-neptunes are poorly understood. Various planetary origin scenarios predict a wide range of possible formation entropies. We show how the formation entropies of young ($\sim$20-60 Myr), highly irradiated planets can be constrained if their mass, radius and age are measured. This method works by determining how low-mass a H/He envelope a planet can retain against mass-loss. This lower bound on the H/He envelope mass can then be converted into an upper bound on the entropy. If planet mass measurements with errors $\lesssim 20$\% can be achieved for the discovered young planets around DS Tuc A and V1298 Tau, then insights into their origins can be obtained. For these planets, higher measured planet masses would be consistent with standard core-accretion theory. In contrast, lower planet masses ($\lesssim 6-7$ M$_\oplus$) would require a "boil-off" phase during protoplanetary disc dispersal to explain.
description: Accepted for publication in MNRAS
Infrared actuation in aligned polymer-nanotube composites
Creators: name: Ahir, S. V.
name: Squires, A. M.
name: Tajbakhsh, A. R.
name: Terentjev, E. M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Rubber composites containing multi-walled carbon nanotubes have been irradiated with near infrared light to study their reversible photo-mechanical actuation response. We demonstrate that the actuation is reproducible across differing polymer systems. The response is directly related to the degree of uniaxial alignment of the nanotubes in the matrix, contracting the samples along the alignment axis. The actuation stroke depends on the specific polymer being tested, however, the general response is universal for all composites tested. We conduct a detailed study of tube alignment induced by stress and propose a model for the reversible actuation behavior, based on the orientational averaging of the local response. The single phenomenological parameter of this model describes the response of an individual tube to adsorption of low-energy photons; its experimentally determined value may suggest some ideas about such a response.
description: 13 pages, 14 figures
FPGA prototyping of synchronized chaotic map for UAV secure communication
Creators: name: Nwachioma, Christian
name: Ezuma, Martins
name: Medaiyese, Olusiji . O.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: We propose a design that uses the principle of chaos for UAV secure communication. A UAV identified as an aerial base station communicates with a ground base station over an RF channel. The communication units have dynamics based on the logistic map. The map is chaotic in the appropriate parameter space. Its states are non-periodic, broadband, and noise-like in the frequency domain. They are useful for spreading information during transmission, making it difficult for an eavesdropper to recover the modulated message since state prediction is ultimately impossible. To retrieve it, we propose a variable feedback controller. It asymptotically stabilizes the error dynamics when the information source is off. During transmission, the controller synchronizes the units such that the error contains signatures of the information signal. Therefore, the information signal is retrievable by a suitable detection mechanism. Security depends on the confidentiality of the map, the variable feedback controller, including its scale factor and bounded feedback gain, and the designer`s choice of invertible function for use in the scrambling and descrambling process. Also, the method is less prone to jamming attacks and multipath effects as the broadband spectrum can be used to randomly select RF channels. It uses only a few simple algorithms, including a correlation summation and a detection mechanism. The algorithms collect subsamples of the received signal sequences and averages over each subsample length. The method requires minimal programming efforts and low hardware resource utilization. It is energy-efficient, which is a vital consideration for any UAV security model. Moreover, we realize a prototype of the communication system on field-programmable gate arrays. We presented a digital design of the secure communication system involving the transmission of bitstreams between the ABS and GBS.
description: 7 pages, 9 figures, 2021 IEEE Aerospace
UVES - VLT High Resolution Spectroscopy of GRB Afterglows
Creators: name: D'Elia, V.
name: Piranomonte, S.
name: Ward, P.
name: Fiore, F.
name: Meurs, E. J. A.
name: Norci, L.
name: Vergani, S. D.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present early time, high resolution spectroscopy of three GRB afterglows: GRB050730, GRB050922C and GRB060418. These data give us precious information on the kinematics, ionization and metallicity of the interstellar matter of GRB host galaxies up to a redshift z = 4, and of intervening absorbers along the line of sight. The absorption spectra show that elements are present both with high and low ionization states, and even forbidden, fine structure levels are commonly observed. These features allow us to evaluate the physical parameters of the absorbing gas. In details, the density of the gas regions lie in the range n = 10 - 10^6 cm-3, and the temperatures are of the order of T = 10^3 - 10^4 K. The metallicity of the GRB host galaxies is computed using the hydrogen absorption features. We find undersolar abundances for our GRBs, namely, Z = 0.001 - 0.01. However, depletion has not been considered. It can be taken into account using as metallicity indicators Zn and Cr, which tend to remain in the gas phase. We find metallicities higher than the previous values and in agreement with other measurements for GRB host galaxies. Finally, the observed [C/Fe] ratio for GRB050730 (z = 3.967) agrees with values expected for a galaxy younger than a Gyr undergoing bursts of star-formation. In addition, the [C/Fe] ratio evaluated component by component can give informations on the relative distances of the components from the GRB explosion site, since Fe dust is more efficiently destroyed than graphite.
description: 8 pages, 11 figure, To appear in "The Multicoloured Landscape of Compact Objects and their Explosive Progenitors: Theory vs Observations" (Cefalu, Sicily, June 2006). Eds. L. Burderi et al. (New York: AIP)
ALMA observations of the early stages of substellar formation in the Lupus 1 and 3 molecular clouds
Creators: name: Santamaría-Miranda, A.
name: de Gregorio-Monsalvo, I.
name: Plunkett, A. L.
name: Huélamo, N.
name: López, C.
name: Ribas, Á.
name: Schreiber, M. R.
name: Mužić, K.
name: Palau, A.
name: Knee, L. B. G.
name: Bayo, A.
name: Comerón, F.
name: Hales, A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The dominant mechanism leading to the formation of brown dwarfs (BDs) remains uncertain. The most direct keys to formation, which are obtained from younger objects (pre-BD cores and proto-BDs), are limited by the very low number statistics available. We aim to identify and characterize a set of pre- and proto-BDs as well as Class II BDs in the Lupus 1 and 3 molecular clouds to test their formation mechanism. We performed ALMA band 6 (1.3 mm) continuum observations of a selection of 64 cores previously identified from AzTEC/ASTE data (1.1 mm), along with previously known Class II BDs in the Lupus 1 and 3 molecular clouds. Surveyed archival data in the optical were used to complement these observations. We expect these ALMA observations prove efficient in detecting the youngest sources in these regions, since they probe the frequency domain at which these sources emit most of their radiation. We detected 19 sources from 15 ALMA fields. Considering all the pointings in our observing setup, the ALMA detection rate was $\sim$23% and the derived masses of the detected sources were between $\sim$0.18 and 124 $\mathrm{M_{Jup}}$. We classified these sources according to their spectral energy distribution as 5 Class II sources, 2 new Class I/0 candidats, and 12 new possible pre-BD or deeply embedded protostellar candidates. We detected a promising candidate for a Class 0/I proto-BD source and inferred the disk dust mass of a bona fide Class II BD. The pre-BD cores might be the byproduct of an ongoing process of large-scale collapse. The Class II BD disks follow the correlation between disk mass and the mass of the central object that is observed at the low-mass stellar regime. We conclude that it is highly probable that the sources in the sample are formed as a scaled-down version of low-mass star formation, although disk fragmentation may be responsible for a considerable fraction of BDs.
description: 21 pages, 10 figures, 13 tables, 3 Appendixes. Accepted in A&A
MPEC 2024-A14 : 2023 QR105
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2024
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2023 QR105

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Approaching complex societal issues: the applicability of knowledge management in practice
Creators: name: Simatwo, Sharon
Publisher: name: Loughborough University
Year: 2024
Subjects: classificationCode: 359999
subject: Other commerce, management, tourism and services not elsewhere classified

description: Tackling complex societal issues such as climate change, poverty, food security; and ensuring sustainability and resilience of efforts on the same has seen the interaction of institutions across domain boundaries to create and share knowledge in a bid to develop solutions to these problems. The importance of knowledge in such settings is implied in studies such as in transdisciplinary research where some authors have addressed knowledge-related issues such as knowledge creation and knowledge transfer within such contexts. Knowledge management (KM) is a long-standing discipline that prescribes strategies on the creation, use/reuse, dissemination and storage of knowledge. Since its inception as a discipline, a plethora of KM frameworks and tools have been developed for which organisations can effectively manage knowledge. The purpose of this thesis is in exploring the extent to which the principles of KM are applicable in addressing complex societal issues. It draws attention to the paucity of KM strategies within the discipline at the macro-level where complex societal issues are addressed and proposes that the next generation of the KM discipline is one that reflects the complexity of addressing complex societal issues. An empirical study of food security in Kenya is employed as the research environment, for which a grounded theory approach is applied into an investigation of factors to be considered for the development of KM strategies at the complex systems level where complex societal issues are addressed. Interviews were conducted in institutions across national government, county government, research and non-government organisations tackling food security in Kenya. The findings reveal that primarily, there is no systematic approach to managing and sharing food security knowledge at the macro-level across the main institutions involved; and a fundamental challenge in the coordination of food security efforts across the stakeholders involved is identified. An analysis and discussion of the findings propose that KM on its own may not suffice in tackling complex issues and may need to be complemented by principles from the systems thinking discipline.The thesis makes two main contributions to the field of knowledge management. The first is in the proposal for a next generation of KM which would be suited in addressing complex societal issues. The second is in the implications drawn from the empirical study which demonstrate the factors and elements to be considered in the development of a macro-level KM strategy for food security in Kenya has been presented.
Το δίκαιο ως μέσο Επικοινωνίας:
Creators: name: Γαϊτανίδου, Αγγελική Σταύρου
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: subject: Δίκαιο
subject: Επικοινωνία
subject: Μηνύματα
subject: Law
subject: FOS: Law
subject: Communication
subject: Messages

description: Σκοπός της διπλωματικής εργασίας ήταν η μελέτη του τρόπου με τον οποίο το δίκαιο λειτουργεί ως μέσο επικοινωνίας. Πιο συγκεκριμένα, επικεντρώνεται στον τρόπο με τον οποίο τα δικαιικά μηνύματα λειτουργούν ως όργανα κοινωνικής επικοινωνίας και καθορίζουν συνακόλουθα τις συμπεριφορές των ατόμων. Δίδεται έμφαση στην ανάλυση του περιεχομένου των δικαιικών κανόνων, στον τρόπο πιθανής αλλοίωσης από την πηγή αλλά και από τους ενδιάμεσους σταθμούς μετάδοσής τους. Προτείνονται τέλος μέθοδοι για τη διατύπωση του περιεχομένου των κανόνων δικαίου ούτως ώστε οι τελευταίοι να μετατρέπονται σε βιωματική εμπειρία των αποδεκτών τους.
description: The aim of the present thesis was the study of the way the law functions as a means of communication. Specifically, it focuses on the way the law messages function as a tool of social communication and influence as a consequence the people’s bahaviour. Emphasis is given on the analysis of the context of the laws, on the way the law messages are meaningly changed from the source and from the procedures which interfere and helps transmitting them. Methods for the phrasing of the laws are suggested, so as to be converted to an experiental activity for their receivers.
Similarity for downscaled kinetic simulations of electrostatic plasmas: reconciling the large system size with small Debye length
Creators: name: Zhang, Yanzeng
name: Mao, Haotian
name: Li, Yuzhi
name: Tang, Xian-Zhu
Publisher: name: arXiv
Year: 2025
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: A simple similarity has been proposed for kinetic (e.g., particle-in-cell) simulations of plasma transport that can effectively address the longstanding challenge of reconciling the tiny Debye length with the vast system size. This applies to both transport in unmagnetized plasma and parallel transport in magnetized plasmas, where the characteristics length scales are given by the Debye length, collisional mean free paths, and the system or gradient lengths. The controlled scaled variables are the configuration space, $\mathbf{x}/\mathscr{L},$ and artificial collisional rates, $\mathscr{L}μ$, which is realized through scaling the Coulomb Logarithm in the simulations, $\mathscr{L}\ln Λ.$ Whereas, the scaled time, $t/\mathscr{L}$, and electric field, $\mathscr{L}\mathbf{E}$, are automatic outcomes. The similarity properties are examined, demonstrating that the macroscopic transport physics is preserved through a similarity transformation while keeping the microscopic physics at its original scale of Debye length. To showcase the utility of this approach, two examples of 1D plasma transport problems were simulated using the VPIC code: the plasma thermal quench in tokamaks [J. Li, et al., Nuclear Fusion \textbf{63}, 066030 (2023)] and the plasma sheath in the high-recycling regime [Y. Li, et al., Physics of
 Plasmas \textbf{30}, 063505 (2023)].
Far-Infrared detection of H2D+ toward Sgr B2
Creators: name: Cernicharo, J.
name: Polehampton, E.
name: Goicoechea, J. R.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report on the first far-IR detection of H2D+, using the Infrared Space Observatory, in the line of sight toward Sgr B2 in the galactic center. The transition at 126.853 um connecting the ground level of o-H2D+, 1_1,1 with the the 2_1,2 level at 113 K, is observed in absorption against the continuum emission of the cold dust of the source. The line is broad, with a total absorption covering 350 km s^-1, i.e., similar to that observed in the fundamental transitions of H2O, OH and CH at ~179, 119 and 149 um respectively. For the physical conditions of the different absorbing clouds the H2D+ column density ranges from 2 to 5x10^13 cm^-2, i.e., near an order of magnitude below the upper limits obtained from ground based submillimeter telescopes. The derived H2D+ abundance is of a few 10^-10, which agrees with chemical models predictions for a gas at a kinetic temperature of ~20K.
description: Accepted in ApJ letters. Non edited
Transient Stability Analysis of Power Grids with Admissible and Maximal Robust Positively Invariant Sets
Creators: name: Aschenbruck, Tim
name: Esterhuizen, Willem
name: Streif, Stefan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optimization and Control (math.OC)
subject: Systems and Control (eess.SY)
subject: FOS: Mathematics
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: 93A15, 93-08, 93D99

description: The energy transition is causing many stability-related challenges for power systems. Transient stability refers to the ability of a power grid's bus angles to retain synchronism after the occurrence of a major fault. In this paper a set-based approach is presented to assess the transient stability of power systems. The approach is based on the theory of barriers, to obtain an exact description of the boundaries of admissible sets and maximal robust positively invariant sets, respectively. We decompose a power system into generator and load components, replace couplings with bounded disturbances and obtain the sets for each component separately. From this we deduce transient stability properties for the entire system. We demonstrate the results of our approach through an example of one machine connected to one load and a multi-machine system.
description: 8 pages, 8 figures, published in at - Automatisierungstechnik
Small scale statistics of viscoelastic turbulence
Creators: name: Berti, S.
name: Bistagnino, A.
name: Boffetta, G.
name: Celani, A.
name: Musacchio, S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: The small scale statistics of homogeneous isotropic turbulence of dilute polymer solutions is investigated by means of direct numerical simulations of a simplified viscoelastic fluid model. It is found that polymers only partially suppress the turbulent cascade below the Lumley scale, leaving a remnant energy flux even for large elasticity. As a consequence, fluid acceleration in viscoelastic flows is reduced with respect to Newtonian turbulence, whereas its rescaled probability density is left unchanged. At large scales the velocity field is found to be unaffected by the presence of polymers.
description: 7 pages, 4 figures
Γλωσσοδιδακτικές μέθοδοι και προσεγγίσεις στο γερμανικό εγχειρίδιο διδασκαλίας “Deutsch-ein Hit 1” της Α΄ Γυμνασίου:
Creators: name: Τοτσίδου, Ελένη Μιχαήλ
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: ξενόγλωσση διδασκαλία
σχολικό εγχειρίδιο
προσεγγίσεις
foreign language teaching
schoolbook
approaches

description: Η παρούσα εργασία είχε σαν στόχο να αναδείξει τις γλωσσοδιδακτικές προσεγγίσεις ή τις μεθόδους που αντανακλώνται στο εγχειρίδιο διδασκαλίας της γερμανικής γλώσσας της Α΄ Γυμνασίου, «Deutsch ein Hit 1», το οποίο εισήχθη στην ελληνική δημόσια εκπαίδευση κατά το σχολικό έτος 2006-2007. Έγινε διερεύνηση των διεθνών προσεγγίσεων και μεθόδων ξενόγλωσσης διδασκαλίας που επηρέασαν ή επηρεάζουν τη διδασκαλία των ξένων γλωσσών μέχρι σήμερα καθώς και μια σύντομη αναφορά στην έρευνα των σχολικών εγχειριδίων. Μεθοδολογικά ακολουθήθηκε η ποιοτική ανάλυση περιεχομένου. Μέσα από τα ευρήματα της ανάλυσης περιγράφονται οι βασικές μεθοδολογικές αρχές που ακολουθούνται στο δείγμα που αναλύθηκε με στόχο να παρουσιαστεί ο βαθμός διάχυσης των μεθόδων ή προσεγγίσεων που υιοθετήθηκαν στο εγχειρίδιο.
description: The aim of the present thesis has been the study of the language teaching approaches and methods that arise in the german language schoolbook 'Deutsch ein Hit 1' of the first grade junior high, a schoolbook that was introduced in greek public education during academic year 2006-2007. What has been examined was the international approaches and methods in foreign language teaching that influenced foreign language teaching up to now and there has been a brief report on the research conducted on school books. The methodology followed was the qualitative content analysis. Through the findings of the analysis, the basic methodology principles followed by the schoolbook are described with the aim of presenting the grade of 'difussion' of each method or approach adopted by the schoolbook.
Chiral $p$-wave superconductivity in a twisted array of proximitized quantum wires
Creators: name: Tummuru, Tarun
name: Can, Oguzhan
name: Franz, Marcel
Publisher: name: arXiv
Year: 2020
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: A superconductor with $p_x+ip_y$ order has long fascinated the physics community because vortex defects in such a system host Majorana zero modes. Here we propose a simple construction of a chiral superconductor using proximitized quantum wires and twist angle engineering as basic ingredients. We show that a weakly coupled parallel array of such wires forms a gapless $p$-wave superconductor. Two such arrays, stacked on top of one another with a twist angle close to $90^\circ$, spontaneously break time reversal symmetry and form a robust, fully gapped $p_x+ip_y$ superconductor. We map out topological phases of the proposed system, demonstrate existence of Majorana zero modes in vortices, and discuss prospects for experimental realization.
description: 5 pages, 3 figures; supplementary material
Modeling injury severity of crashes involving golf carts: A case study of The Villages, Florida
Creators: name: Kinero, Abdallah
name: Bukuru, Kabhabhela
name: Mwambeleko, Enock E.
name: Sando, Thobias
name: Alluri, Priyanka
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Genetics
subject: Molecular Biology
subject: Pharmacology
subject: Biotechnology
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: Sociology
subject: FOS: Sociology
subject: Science Policy

description: Crashes involving golf carts (GCs) have been on an increasing trend in recent years, particularly in the United States. This study focuses on analyzing GC crashes in the Florida community known as The Villages, one of the largest GC-oriented communities in the nation and worldwide. The objective was to evaluate the injury severity of crashes involving GCs in a retirement community where GCs are a common mode of transportation. The ordinal logistic regression (OLR) and Decision Tree Ensemble (DTE) models were used to analyze the injury severity of 616 GC-related crashes. Models’ accuracy parameters were used to check their reliability. The analysis revealed that GC crash severity is influenced by various factors. Factors found to be significant by the OLR model in determining injury severity include ejection of one or more occupants from the GC, the extent of damage to the GC, GC speed prior to the crash, roadway characteristics (including divided roadways, traffic control devices, paved shoulders, and T-intersections), and roll-over incidents. The OLR model demonstrated an overall accuracy of approximately 71% in predicting injury severity. The DTE model performed better, with an overall accuracy of 78%. The OLR model’s findings were supported by the DTE model, which identified estimated GC speed, occupant(s) ejection from the GC, estimated GC vehicle damage, intersection type, and type of shoulder as the most important factors influencing GC crash severity. Understanding these factors is vital for transportation agencies to develop effective strategies to reduce the severity of GC crashes, ensuring the safety of GC users. This study provides recommendations to transportation agencies on measures to improve the safety of GCs.
On Eisenbud's and Wigner's R-matrix: A general approach
Creators: name: Behrndt, J.
name: Neidhardt, H.
name: Racec, E. R.
name: Racec, P. N.
name: Wulf, U.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mathematical Physics (math-ph)
subject: Spectral Theory (math.SP)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 47A40, 34L25, 81U20

description: The main objective of this paper is to give a rigorous treatment of Wigner's and Eisenbud's $R$-matrix method for scattering matrices of scattering systems consisting of two selfadjoint extensions of the same symmetric operator with finite deficiency indices. In the framework of boundary triplets and associated Weyl functions an abstract generalization of the $R$-matrix method is developed and the results are applied to Schrödinger operators on the real axis.
The MOSDEF Survey: An Improved Voronoi Binning Technique on Spatially Resolved Stellar Populations at z~2
Creators: name: Fetherolf, Tara
name: Reddy, Naveen
name: Shapley, Alice
name: Kriek, Mariska
name: Siana, Brian
name: Coil, Alison
name: Mobasher, Bahram
name: Freeman, William
name: Sanders, Ryan
name: Price, Sedona
name: Shivaei, Irene
name: Azadi, Mojegan
name: de Groot, Laura
name: Leung, Gene
name: Zick, Tom
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We use a sample of 350 star-forming galaxies at $1.25
description: 23 pages, 15 figures, accepted for publication in MNRAS
Universal Quantum Computation in a Neutral Atom Decoherence Free Subspace
Creators: name: Brion, E.
name: Pedersen, L. H.
name: Molmer, K.
name: Chutia, S.
name: Saffman, M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In this paper, we propose a way to achieve protected universal computation in a neutral atom quantum computer subject to collective dephasing. Our proposal relies on the existence of a Decoherence Free Subspace (DFS), resulting from symmetry properties of the errors. After briefly describing the physical system and the error model considered, we show how to encode information into the DFS and build a complete set of safe universal gates. Finally, we provide numerical simulations for the fidelity of the different gates in the presence of time-dependent phase errors and discuss their performance and practical feasibility.
description: 7 pages, 8 figures
An asymptotically safe SU(5) GUT
Creators: name: Fabbrichesi, M.
name: Nieto, C. M.
name: Tonero, A.
name: Ugolotti, A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We minimally extend the Standard Model field content by adding new vector-like fermions at the TeV scale to allow gauge coupling unification at a realistic scale. We embed the model into a $SU(5)$ grand unified theory that is asymptotically safe and features an interacting fixed point for the gauge coupling. There are no Landau poles of the $U(1)$ gauge and Higgs couplings. Gauge, Yukawa and Higgs couplings are retraced from the fixed point and matched at the grand unification scale to those of the Standard Model rescaled up to the same energy. All couplings, their fixed point values and critical exponents always remain in the perturbative regime.
description: 25 pages, 3 figures, 6 tables
A comparison of licensed driver counts from the Federal Highway Administration and driver licensing agencies in 11 states
Creators: name: Evans, Alexander
name: Benedetti, Marco H.
name: Chang, Gregory
name: Shoots-Reinhard, Brittany
name: Chen, Zhenhua
name: Smith, Gary A.
name: Zhu, Motao
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Medicine
subject: Biotechnology
subject: Sociology
subject: FOS: Sociology
subject: Mathematical Sciences not elsewhere classified
subject: Science Policy
subject: Mental Health

description: Objective: Those who study motor vehicle crashes may rely on counts of licensed drivers to estimate crash, injury, or fatality rates. These counts may be obtained from the U.S. Department of Transportation Federal Highway Administration’s (FHWA) annual Highway Statistics Series or directly from state driver licensing agencies. However, previous studies have questioned the accuracy of these counts provided by the FHWA.Methods: To investigate this issue, we compared counts of licensed drivers from the FHWA and state licensing agencies in 11 states, categorized by sex and age group, from 2013 through 2017. We then assessed the impact of any potential differences by fitting two sets of Poisson regression models to estimate age- and sex-based driver fatality rate ratios. One set of models used counts from the FHWA as the offset and the other used counts from state licensing agencies.Results: Our analysis found that the differences between FHWA and state counts varied markedly. Seven states had substantial differences for at least one age group that spanned the entire study period. In several cases, these differences in license counts were large enough to produce directly contradictory driver fatality rate ratio estimates when comparing age groups.Conclusions: These findings highlight the continued concern regarding the accuracy of licensed driver counts from the FHWA and extend previous studies by illustrating the impact of using FHWA counts on statistical inference. We recommend against using these data for traffic safety research or policy evaluation. Nevertheless, we acknowledge the need for a centralized, easily accessible database for licensed driver data.
Σκηνοθετικά Ζητήματα στις «Χοηφόρες» του Αισχύλου:
Creators: name: Μπατσίλα, Χριστίνα Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: Αισχύλος
Χοηφόροι
Σκηνοθεσία
Aeschylus
Choefori
Stagecraft

description: Σκοπός της παρούσας εργασίας είναι ο εντοπισμός των σκηνοθετικών ζητημάτων και η παρουσίαση των προτάσεων που έγιναν για την αντιμετώπιση των ζητημάτων αυτών στην τραγωδία του Αισχύλου «Χοηφόρες». Αρχικά παρατίθενται τα στοιχεία που διαθέτουμε για το θέατρο στην αρχαιότητα γενικά, το θέατρο την εποχή του Αισχύλου και πιο συγκεκριμένα στις «Χοηφόρες». Αναλύοντας την τραγωδία κατά στίχον, παρουσιάζονται τα σημεία εκείνα του κειμένου που σχετίζονται με τη σκηνοθεσία της, όσον αφορά το σκηνικό οικοδόμημα, την παρουσία των υποκριτών στο σκηνικό και εξωσκηνικό χώρο, την ενδυμασία ή τα αντικείμενα που αυτοί φέρουν, καθώς και τη χρήση μηχανών, όπως το εκκύκλημα.
description: The aim of the present thesis study is to identify the issues regarding the stagecraft of the Aeschylean tragedy “Libation Bearers” (Choefori) and to present the proposals made to address these issues. Firstly we presented the elements of theater in ancient Greece in general, the theater at the time of Aeschylus and more specifically in the "Libation Bearers". Analyzing the tragedy in verse, we presented the points of the text associated with the direction of it, the stage building, the presence of actors in the on- stage and off – stage area, the costumes they attire and the objects they are carrying, as well as the use of machines such as the ekkyklima.
Early galaxy growth: mergers or gravitational instability?
Creators: name: Zanella, A.
name: Pallottini, A.
name: Ferrara, A.
name: Gallerani, S.
name: Carniani, S.
name: Kohandel, M.
name: Behrens, C.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We investigate the spatially-resolved morphology of galaxies in the early Universe. We consider a typical redshift z = 6 Lyman Break galaxy, "Althaea" from the SERRA hydrodynamical simulations. We create mock rest-frame ultraviolet, optical, and far-infrared observations, and perform a two-dimensional morphological analysis to de-blend the galaxy disk from substructures (merging satellites or star-forming regions). We find that the [CII]158um emitting region has an effective radius 1.5 - 2.5 times larger than the optical one, consistent with recent observations. This [CII] halo in our simulated galaxy arises as the joint effect of stellar outflows and carbon photoionization by the galaxy UV field, rather than from the emission of unresolved nearby satellites. At the typical angular resolution of current observations (> 0.15") only merging satellites can be detected; detection of star-forming regions requires resolutions of < 0.05". The [CII]-detected satellite has a 2.5 kpc projected distance from the galaxy disk, whereas the star-forming regions are embedded in the disk itself (distance < 1 kpc). This suggests that multi-component systems reported in the literature, which have separations > 2 kpc, are merging satellites, rather than galactic substructures. Finally, the star-forming regions found in our mock maps follow the local L[CII] - SFR_UV relation of galaxy disks, although sampling the low-luminosity, low-SFR tail of the distribution. We show that future JWST observations, bridging UV and [CII] datasets, will be exceptionally suited to characterize galaxy substructures thanks to their exquisite spatial resolution and sensitivity to both low-metallicity and dust-obscured regions that are bright at infrared wavelengths.
description: Accepted for publication in MNRAS; 17 pages (plus appendix), 7 figures, 4 tables
Theoretical study of one-proton removal from 15O
Creators: name: Parfenova, Y. L.
name: Zhukov, M. V.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: One-proton removal from 15O at intermediate energies (56 A MeV) is studied in the eikonal approximation of the Glauber model. The production of the 14N core fragment in the ground and excited states is regarded. The calculated proton removal cross section, the 15O interaction cross section, and the longitudinal momentum distribution of the 14N fragments are compared to recent experimental data [1]. [1] H. Jeppesen, R. Kanungo, B. Abu-Ibrahim it et al, Nucl. Phys. A 739, 57 (2004).
description: 7 pages, 4 figures
Demographic adjustments to driver death rates by vehicle type and size
Creators: name: Farmer, Charles M.
Publisher: name: Taylor & Francis
Year: 2023
Subjects: Cell Biology
Neuroscience
Pharmacology
Biotechnology
Biological Sciences not elsewhere classified
Mathematical Sciences not elsewhere classified
Cancer
Science Policy
Mental Health

description: Driver death rates per million registered vehicles are often used to compare the real-world crash experiences of vehicles of different types and sizes. However, these rates are affected by the risky behavior of drivers (e.g., speeding, impaired driving, lack of restraint use) that differs by age and gender. This paper presents a method for adjusting driver death rates to account for differences in driver age and gender. Driver death rates per million registered vehicles per year were calculated for passenger vehicles of model year 2020. To account for potential differences in driver exposure by age and gender, which can affect motor vehicle crash and injury experience, an algebraic method was used to standardize these rates to a common distribution of female drivers ages 25–64. The standardization depends upon an independent estimate of the relative fatality risk for female drivers ages 25–64. The smallest vehicles tended to have higher driver death rates compared with larger vehicles. However, for sports cars, this trend was reversed; larger sports cars had higher driver death rates. Vehicle types popular with male drivers, such as sports cars and pickups, had standardized death rates that were much lower than the raw rates. The adjustment for driver age and gender greatly reduced the variability of driver death rates among vehicle types. The procedure used here to adjust driver death rates for driver age and gender can be extended to any situation where it is desired to compare the crash rates of two or more subgroups of a population.
Spin-orbit coupling induced splitting of Yu-Shiba-Rusinov states in antiferromagnetic dimers
Creators: name: Beck, Philip
name: Schneider, Lucas
name: Rózsa, Levente
name: Palotás, Krisztián
name: Lászlóffy, András
name: Szunyogh, László
name: Wiebe, Jens
name: Wiesendanger, Roland
Publisher: name: arXiv
Year: 2020
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Magnetic atoms coupled to the Cooper pairs of a superconductor induce Yu-Shiba-Rusinov states (in short Shiba states). In the presence of sufficiently strong spin-orbit coupling, the bands formed by hybridization of the Shiba states in ensembles of such atoms can support low-dimensional topological superconductivity with Majorana bound states localized on the ensembles' edges. Yet, the role of spin-orbit coupling for the hybridization of Shiba states in dimers of magnetic atoms, the building blocks for such systems, is largely unexplored. Here, we reveal the evolution of hybridized multi-orbital Shiba states from a single Mn adatom to artificially constructed ferromagnetically and antiferromagnetically coupled Mn dimers placed on a Nb(110) surface. Upon dimer formation, the atomic Shiba orbitals split for both types of magnetic alignment. Our theoretical calculations attribute the unexpected splitting in antiferromagnetic dimers to spin-orbit coupling and broken inversion symmetry at the surface. Our observations point out the relevance of previously unconsidered factors on the formation of Shiba bands and their topological classification.
description: 22 pages Main Text with 4 Figures and 2 Tables, 29 pages Supplementary Information
The molecular dissection of TRIM25's RNA-binding mechanism provides key insights into its antiviral activity.
Creators: name: Álvarez, Lucía
name: Haubrich, Kevin
name: Iselin, Louisa
name: Gillioz, Laurent
name: Ruscica, Vincenzo
name: Lapouge, Karine
name: Augsten, Sandra
name: Huppertz, Ina
name: Choudhury, Nila Roy
name: Simon, Bernd
name: Masiewicz, Pawel
name: Lethier, Mathilde
name: Cusack, Stephen
name: Rittinger, Katrin
name: Gabel, Frank
name: Leitner, Alexander
name: Michlewski, Gracjan
name: Hentze, Matthias W
name: Allain, Frédéric HT
name: Castello, Alfredo
name: Hennig, Janosch
Publisher: name: The Francis Crick Institute
Year: 2024
Subjects: classificationCode: Signalling & Oncogenes
subject: Signalling & Oncogenes
classificationCode: Chemical Biology & High Throughput
subject: Chemical Biology & High Throughput
classificationCode: Infectious Disease
subject: Infectious Disease
classificationCode: Immunology
subject: Immunology
subject: FOS: Clinical medicine
classificationCode: Biochemistry & Proteomics
subject: Biochemistry & Proteomics
classificationCode: Structural Biology & Biophysics
subject: Structural Biology & Biophysics

description: TRIM25 is an RNA-binding ubiquitin E3 ligase with central but poorly understood roles in the innate immune response to RNA viruses. The link between TRIM25's RNA binding and its role in innate immunity has not been established. Thus, we utilized a multitude of biophysical techniques to identify key RNA-binding residues of TRIM25 and developed an RNA-binding deficient mutant (TRIM25-m9). Using iCLIP2 in virus-infected and uninfected cells, we identified TRIM25's RNA sequence and structure specificity, that it binds specifically to viral RNA, and that the interaction with RNA is critical for its antiviral activity.
Δικαίωμα απεργίας και δικονομικά ζητήματα:
Creators: name: Γιαννακούλας, Κωνσταντίνος–Δημήτριος Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: Απεργία
Δικονομικά ζητήματα
Δικαστική απαγόρευση
Strike
Procedure issues
Judicial ban

description: Η διπλωματική εργασία ξεκινά με μια γενική αναφορά στο δικαίωμα απεργίας ( κατοχύρωση στο Σύνταγμα και σε Διεθνή Κείμενα, περιορισμοί του δικαιώματος από τον συνταγματικό και τον κοινό νομοθέτη, μέτρα προστασίας του δικαιώματος ), ενώ ειδική αναφορά γίνεται στο τεκμήριο νομιμότητας της απεργίας. Στο ειδικό μέρος της εργασίας, αναλύονται δικονομικά ζητήματα των απεργιακών διαφορών, όπως το ζήτημα της ενεργητικής νομιμοποίησης τρίτων στις απεργιακές διαφορές και το ζήτημα της νομιμότητας του καταψηφιστικού αιτήματος για τη δικαστική διακοπή της παράνομης απεργίας, με αναφορά στις διατυπωθείσες απόψεις.
description: Thesis starts with a general reference to the right to strike ( guarantee in the Greek Constitution and others International Contracts, constitutional and legislative right’s restrictions and protection measures ), with special reference to the legitimacy presumption of the right to strike. In the main part of this thesis, procedural issues are analyzed, with emphasis on the issues of indirectly damaged person’s standing and the legitimacy of employer’s request for judicial ban of the illegal strike.
Top quark spin correlations in the Randall-Sundrum model at the CERN Large Hadron Collider
Creators: name: Arai, Masato
name: Okada, Nobuchika
name: Smolek, Karel
name: Simak, Vladislav
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In the Randall-Sundrum model, we study top-antitop pair production and top spin correlations at the Large Hadron Collider. In addition to the Standard Model processes, there is a new contribution to the top-antitop pair production process mediated by graviton Kaluza-Klein modes in the s-channel. We calculate the density matrix for the top-antitop pair production including the new contribution. With a reasonable parameter choice in the Randall-Sundrum model, we find a sizable deviation of the top-antitop pair production cross section and the top spin correlations from those in the Standard Model. In particular, resonant productions of the graviton Kaluza-Klein modes give rise to a remarkable enhancement of such a deviation.
description: 18 pages, 7 figures, discussion added, typos corrected, references added, version accepted by PRD
Warm Inflation, Neutrinos and Dark matter: a minimal extension of the Standard Model
Creators: name: Levy, Miguel
name: Rosa, João G.
name: Ventura, Luis B.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We show that warm inflation can be realized within a minimal extension of the Standard Model with three right-handed neutrinos, three complex scalars and a gauged lepton/B-L U(1) symmetry. This simple model can address all the shortcomings of the Standard Model that are not related to fine-tuning, within general relativity, with distinctive experimental signatures that can be probed in the near future. The inflaton field emerges from the collective breaking of the U(1) symmetry, and interacts with two of the right-handed neutrinos, sustaining a high-temperature radiation bath during inflation. The discrete interchange symmetry of the model protects the scalar potential against large thermal corrections and leads to a stable inflaton remnant at late times which can account for dark matter. Consistency of the model and agreement with Cosmic Microwave Background observations naturally yield light neutrino masses below 0.1 eV, while thermal leptogenesis occurs naturally after a smooth exit from inflation into the radiation era.
description: 43 pages (30 main + 13 appendices), 8 figures. Comments are welcome
An X-ray Survey of Wolf-Rayet Stars in the Magellanic Clouds. I. The Chandra ACIS Dataset
Creators: name: Guerrero, Martin A.
name: Chu, You-Hua
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Wolf-Rayet (WR) stars are evolved massive stars with strong fast stellar winds. WR stars in our Galaxy have shown three possible sources of X-ray emission associated with their winds: shocks in the winds, colliding stellar winds, and wind-blown bubbles; however, quantitative analyses of observations are often hampered by uncertainties in distances and heavy foreground absorption. These problems are mitigated in the Magellanic Clouds (MCs), which are at known distances and have small foreground and internal extinction. We have therefore started a survey of X-ray emission associated with WR stars in the MCs using archival Chandra, ROSAT, and XMM-Newton observations. In the first paper of this series, we report the results for 70 WR stars in the MCs using 192 archival Chandra ACIS observations. X-ray emission is detected from 29 WR stars. We have investigated their X-ray spectral properties, luminosities, and temporal variability. These X-ray sources all have luminosities greater than a few times 10^32 ergs s^-1, with spectra indicative of highly absorbed emission from a thin plasma at high temperatures typical of colliding winds in WR+OB binary systems. Significant X-ray variability with periods ranging from a few hours up to ~20 days is seen associated with several WR stars. In most of these cases, the X-ray variability can be linked to the orbital motion of the WR star in a binary system, further supporting the colliding wind scenario for the origin of the X-ray emission from these stars.
description: To appear in The Astrophysical Journal Supplement. A version with full resolution figures can be obtained upon request to mar@iaa.es