cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Kinematics of Antlia 2 and Crater 2 from The Southern Stellar Stream Spectroscopic Survey (S5)
Creators: name: Ji, Alexander P.
name: Koposov, Sergey E.
name: Li, Ting S.
name: Erkal, Denis
name: Pace, Andrew B.
name: Simon, Joshua D.
name: Belokurov, Vasily
name: Cullinane, Lara R.
name: Da Costa, Gary S.
name: Kuehn, Kyler
name: Lewis, Geraint F.
name: Mackey, Dougal
name: Shipp, Nora
name: Simpson, Jeffrey D.
name: Zucker, Daniel B.
name: Hansen, Terese T.
name: Bland-Hawthorn, Joss
name: Collaboration, S5
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present new spectroscopic observations of the diffuse Milky Way satellite galaxies Antlia 2 and Crater 2, taken as part of the Southern Stellar Stream Spectroscopic Survey (S5). The new observations approximately double the number of confirmed member stars in each galaxy and more than double the spatial extent of spectroscopic observations in Antlia 2. A full kinematic analysis, including Gaia EDR3 proper motions, detects a clear velocity gradient in Antlia 2 and a tentative velocity gradient in Crater 2. The velocity gradient magnitudes and directions are consistent with particle stream simulations of tidal disruption. Furthermore, the orbit and kinematics of Antlia 2 require a model that includes the reflex motion of the Milky Way induced by the Large Magellanic Cloud. We also find that Antlia 2's metallicity was previously overestimated, so it lies on the empirical luminosity-metallicity relation and is likely only now experiencing substantial stellar mass loss. Current dynamical models of Antlia 2 require it to have lost over 90% of its stars to tides, in tension with the low stellar mass loss implied by the updated metallicity. Overall, the new kinematic measurements support a tidal disruption scenario for the origin of these large and extended dwarf spheroidal galaxies.
description: 23 pages (+appendix), 11 figures, accepted to ApJ. Updated to accepted version (1 new figure, minor changes to text) Video of Antlia 2 tidal disruption here: https://www.youtube.com/watch?v=wvt-Q4kRq90
A symmetry principle for Topological Quantum Order
Creators: name: Nussinov, Zohar
name: Ortiz, Gerardo
Publisher: name: arXiv
Year: 2007
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present a unifying framework to study physical systems which exhibit topological quantum order (TQO). The guiding principle behind our approach is that of symmetries and entanglement. We introduce the concept of low-dimensional Gauge-Like Symmetries (GLSs), and the physical conservation laws (including topological terms and fractionalization) which emerge from them. We prove then sufficient conditions for TQO at both zero and finite temperatures. The topological defects which are associated with the restoration of GLSs lead to TQO. Selection rules associated with the GLSs enable us to systematically construct states with TQO; these selection rules do not rely on the existence of a finite gap between the ground states to all other excited states. All currently known examples of TQO display GLSs. We analyze spectral structures and show that Kitaev's toric code model and Wen's plaquette model are equivalent and reduce, by a duality mapping, to an Ising chain. Despite the spectral gap in these systems, the toric operator expectation values may vanish once thermal fluctuations are present. This mapping illustrates that the quantum states themselves in a particular (operator language) representation encode TQO and that the duality mappings, being non-local in the original representation, disentangle the order. We present a general algorithm for the construction of long-range string orders in general systems with entangled ground states.
description: 57 pages, 14 figures, references added
Improvements to the LC Muon Tracking and Identification Software
Creators: name: Milstene, C.
name: Fisk, G.
name: Para, A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: Evolution of the Muon-ID package originally written by R. Markeloff at NIU. The original method used a helical swimmer to extrapolate the tracks from the Interaction Point and to collect hits in all sub-detectors: the electromagnetic and hadronic calorimeters and the muon detector. The package was modified to replace the swimmer by a stepper which does account both for the effects of the magnetic field and for the losses by ionization in the material encountered by the particle. The Modified package shows a substantial improvement in the efficiency of muon identification. It was applied on bbar-b jets and the muon detection efficiency and purity was studied. Further improvement should be reached by accounting for stochastic processes via the utilization of the Kalman filter.
description: PDF,6 pages,4 Figures,2 Tables. Presented at the 2005 International Linear Collider Workshop, Stanford,U.S.A, PSN1011 in the proceeding-typo corrected
Bismuth-doping Alters Structural Phase Transitions in Methylammonium Lead Tribromide Single Crystals
Creators: name: Jedlicka, Erin
name: Wang, Jian
name: Mutch, Joshua
name: Jung, Young-Kwang
name: Went, Preston
name: Mohammed, Joseph
name: Ziffer, Mark
name: Giridharagopal, Rajiv
name: Walsh, Aron
name: Chu, Jiun-Haw
name: Ginger, David S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We study the effects of bismuth doping on the crystal structure and phase transitions in single crystals of the perovskite semiconductor methylammonium lead tribromide, MAPbBr3. By measuring temperature-dependent specific heat capacity (Cp) we find that, as Bi doping increases, the phase transition assigned to the cubic to tetragonal phase boundary decreases in temperature. Furthermore, after doping we observe one phase transition between 135 and 155 K, in contrast to two transitions observed in the undoped single crystal. These results appear strikingly similar to previously reported effects of mechanical pressure on perovskite crystal structure. Using X-ray diffraction, we show that the lattice constant decreases as Bi is incorporated into the crystal, as predicted by density functional theory (DFT). We propose that bismuth substitutional doping on the lead site is dominant, resulting in BiPb+ centers which induce compressive chemical strain that alters the crystalline phase transitions.
description: 19 pages, 4 figures
Rotational hysteresis of the exchange anisotropy direction in Co/FeMn thin films
Creators: name: Olamit, Justin
name: Liu, Kai
Publisher: name: arXiv
Year: 2006
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We have investigated the effects of rotating an applied field on the exchange anisotropy in Co/FeMn thin films. When the applied field is initially along the cooling field direction, the longitudinal hysteresis loop has a maximum coercivity and the transverse hysteresis loop is flat, indicating that the exchange field is along the cooling field direction. When the applied field angle is rotated away and then restored to the original field cooling direction, the exchange anisotropy direction has changed. The rotation of the exchange field direction trails the applied field and is hysteretic. The rotational hysteresis of the exchange field direction is due to the weak anisotropy in thin FeMn layers, and decreases with increasing FeMn thickness.
description: 13 pages, 3 figures, to appear in J. Appl. Phys
Symmetry Finder: A method for hunting symmetry in neutrino oscillation
Creators: name: Minakata, Hisakazu
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Symmetry in neutrino oscillation serves for a better understanding of the physical properties of the phenomenon. We present a systematic way of finding symmetry in neutrino oscillation, which we call Symmetry Finder (SF). By extending the known framework in vacuum into a matter environment, we derive the SF equation, a powerful machinery for identifying symmetry in the system. After learning lessons on symmetry in the Zaglauer-Schwarzer system with a matter equivalent of the vacuum symmetry, we apply the SF method to the Denton et al. (DMP) perturbation theory to first order. We show that the method is so powerful that we uncover the eight reparametrization symmetries with the $1 \leftrightarrow 2$ state exchange in DMP, denoted as IA, IB, $\cdot \cdot \cdot$, IVB, all new except for IA. The transformations consist of the both fundamental and dynamical variables, indicating their equal importance. It is also shown that all the symmetries discussed in this paper can be understood as the Hamiltonian symmetries, which ensures their all-order validity and applicability to varying density matter.
description: Typo corrected in Table 2, references added, 25 pages
Victimization against Non-Heterosexual Male Adolescents in Bangkok: A Qualitative Study
Creators: name: Sakol Sopitarchasak
name: Ronnapoom Samakkeekarom
name: Teeranee Techasrivichien
name: Suguimoto, S. Pilar
name: Kanokwan Tharawan
name: Kihara, Masahiro
name: Ono-Kihara, Masako
Publisher: name: National Research Council of Thailand
Year: 2015
Subjects: Sexual identity,Gender identity,Non-heterosexual,Victimization,Male, Adolescents

description: 4, 1, Social Science Asia
Relationship of small mammal populations to uniform even-aged shelterwood systems
Creators: name: Trebra, Charlotte Dorothea Von
Publisher: name: University of British Columbia
Year: 2009

description: This study was designed to test the hypothesis that a shelterwood silvicultural system would reduce small mammal population levels in 30% and 50% basal area removal stands. The benefit of an overstory canopy, or shelterwood, may help reduce the frequent frost problems observed in interior Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco var. glauca) plantations, and improve the success of natural regeneration, if seed predation does not threaten the survival of the seed supply. Small mammal population levels, seed fall, seed germination, and seed predation were monitored in order to determine the small mammal population dynamics associated with seed predation in the central interior of British Columbia, Canada. Deer mice (Peromyscus maniculatus) and red-backed voles (Clethrionomys gapperi) were the most common small mammal species sampled prior to harvesting, and both species continued to be dominant in the first and second year post-harvest. There was no negative effect on small mammal populations due to the different intensities of basal area removal. Seed fall crops were recorded the first and second year post-harvest; the seed crop in the second year post-harvest was substantially larger than the first year post-harvest on treatments and controls. Seed predation varied between l5.4x10 and 35.0x10 seeds/ha/month, and seemed to fluctuate with the seasonal small mammal population levels (lower in spring and higher in fall) but not with the amount of seed crop available. Germination occurred in 62% to 63 % of the seeds that survived overwinter, on the seedbeds created during harvesting. Thus, the regeneration success of the stands, with regard to seed survival and establishment, in 30% and 50% basal area removal stands did not seem to be inhibited by the small mammal communities observed on the sites.
Intergenerational Solidarity in Two Rural Thai Villages
Creators: name: Ando, Hirofumi
name: Peerasit Kamnuansilpa
name: Matsukura, Rikiya
name: Supawatanakorn Wongthanavasu
Publisher: name: National Research Council of Thailand
Year: 2015
Subjects: Intergenerational solidarity,Aging,Thailand,Khon Kaen,Intergenerational relationships

description: 4, 1, Social Science Asia
Thermal conductivity of intercalation, conversion, and alloying lithium-ion battery electrode materials as function of their state of charge
Creators: name: Shin, Jungwoo
name: Kim, Sanghyeon
name: Park, Hoonkee
name: Jang, Ho Won
name: Cahill, David G.
name: Braun, Paul V.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Applied Physics (physics.app-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Upon insertion and extraction of lithium, materials important for electrochemical energy storage can undergo changes in thermal conductivity ($Λ$) and elastic modulus ($\it M$). These changes are attributed to evolution of the intrinsic thermal carrier lifetime and interatomic bonding strength associated with structural transitions of electrode materials with varying degrees of reversibility. Using in situ time-domain thermoreflectance (TDTR) and picosecond acoustics, we systemically study $Λ$ and $\it M$ of conversion, intercalation and alloying electrode materials during cycling. The intercalation V$_{2}$O$_{5}$ and TiO$_{2}$ exhibit non-monotonic reversible $Λ$ and $\it M$ switching up to a factor of 1.8 ($Λ$) and 1.5 ($\it M$) as a function of lithium content. The conversion Fe$_{2}$O$_{3}$ and NiO undergo irreversible decays in $Λ$ and $\it M$ upon the first lithiation. The alloying Sb shows the largest and partially reversible order of the magnitude switching in $Λ$ between the delithiated (18 W m$^{-1}$ K$^{-1}$) and lithiated states (<1 W m$^{-1}$ K$^{-1}$). The irreversible $Λ$ is attributed to structural degradation and pulverization resulting from substantial volume changes during cycling. These findings provide new understandings of the thermal and mechanical property evolution of electrode materials during cycling of importance for battery design, and also point to pathways for forming materials with thermally switchable properties.
description: Main article: 31 pages, 6 figures. SI: 23 pages, 12 figures
Two- and three-dimensional velocity structure of the southwestern Canadian Cordillera from seismic refraction data
Creators: name: Zelt, Barry Curtis
Publisher: name: University of British Columbia
Year: 2009

description: The forest tenure system in British Columbia is a fundamental element of provincial forest policy with important economic implications. The effect of tenure on land value and forest management has generated a great deal of speculation, but the lack of empirical information has hindered informed debate. This thesis contributes to this need for empirical information. Forest property rights are described in terms of bundles of characteristics. Analyzing differences in these characteristics locates each form of tenure in the spectrum from complete property rights to the complete absence of property rights. A model for predicting land value and the intensiveness of forest management is developed. An event study of forest policy changes, and a hedonic study, are used to analyze the value of thinly traded forest tenures and that of frequently traded tenures, respectively. The results suggest that the particular property characteristics embodied in a specific form of tenure are important factors in determining the value of forest lands. This thesis also analyzes empirically the effect of forest tenure on silvicultural investment and the quality of forest practices. The results show that variations in silvicultural investment and forest practice are strongly related to the specific characteristics of forest tenure. Variations in land value, silvicultural investment and productivity are attributed to differences in tenure characteristics: a strong and complete form of tenure leads to high land value, high investment and high outputs. Policy implications of this thesis are discussed, and research needs are identified.
Σύνθεση και ανάπτυξη ενός ελληνικού επιχειρηματικού φορέα με βάση τον εξωπορισμό για διεθνή έργα
Creators: name: Μπέκτση, Αικατερίνη Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Εξωπορισμός
Φορέας
Επιχειρηματικό σχέδιο
Outsourcing
Enterprise
Business plan

description: Σκοπός της διατριβής ήταν η σύνθεση και ανάπτυξη ενός ελληνικού επιχειρηματικού φορέα που θα αναλαμβάνει εκπόνηση τεχνικών μελετών διεθνών έργων, με βάση τον εξωπορισμό. Παρουσιάστηκαν στοιχεία για την υφιστάμενη κατάσταση της κατασκευαστικής βιομηχανίας. Αναπτύχθηκε το επιχειρηματικό σχέδιο του φορέα, με βάση την αποστολή και τους αντικειμενικούς σκοπούς του, ενώ προτάθηκε και πιθανή μορφή σύστασής του και νομικής εξασφάλισής του. Εξετάστηκε ο ανταγωνισμός που πρόκειται να αντιμετωπίσει τόσο στο διεθνές επίπεδο όσο και πιθανόν εγχώρια. Αναφέρθηκαν πιθανοί στόχοι αγοράς, με διακριτοποίηση σε γεωγραφικό επίπεδο αλλά και σε ότι αφορά πιθανά είδη έργων, ώστε να γίνουν προτάσεις στόχευσης πελατών. Ένα άλλο θέμα που εξετάστηκε ώστε να γίνουν προτάσεις, ήταν οι στρατηγικές που θα ακολουθήσει ο φορέας, όπως αυτή που θα ενταχθούν οι ενέργειες marketing αλλά και αυτές που αφορούν την προώθηση των δράσεων του και τις δημόσιες σχέσεις που θα ακολουθήσει και τέλος την τιμολογιακή στρατηγική που θα ακολουθεί. Επιπλέον παρουσιάστηκε ένα οικονομικό πλάνο για τα πρώτα τρία έτη λειτουργίας του φορέα βασισμένο σε συντηρητικές υποθέσεις, λαμβάνοντας όμως υπόψη όλες τις απαραίτητες τιμές για την εξαγωγή λογικών και ορθών αποτελεσμάτων. Τέλος, αναφέρονται συμπεράσματα που αφορούν στον αντίκτυπο του φορέα στο περιβάλλον στο οποίο θα ενταχθεί και θα λειτουργεί, αλλά και στον σχεδιασμό και την εφαρμογή του επιχειρηματικού σχεδίου με στόχο την ίδρυση του φορέα.
description: The aim of the present thesis was the composition and development of a Greek outsourced-based enterprise for international projects. Data on the current situation of the construction industry was presented. The company's business plan was developed on the basis of its mission and objectives. A possible form of its constitution and legal assurance was proposed. It has been considered the competition that the enterprise is going to face both internationally and possibly domestically. Potential market targets have been reported, geared to geography, but also to possible types of projects, so that customer targeting proposals can be made. Another issue that was considered to make proposals was the strategies that the enterprise will integrate to its function, such as marketing strategy, but also promotion and public relations strategies, and finally the pricing strategy. In addition, a financial plan was presented for the first three years of enterprise’s operation based on conservative assumptions, but taking into account all the necessary values for the export of reasonable results. Finally, conclusions are made regarding the impact that the enterprise will have in the environment that will operate. Conclusions also are made concerning the design and implementation of the business plan for the establishment of the enterprise.
Cantando música de jakuwy
Creators: name: Mỹky, Kamunu
name: Mỹky, Paatau
name: Bardagil Mas, Bernat
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2023
Subjects: subject: irn

description: Kamũnũ e Paatau interpretam juntas algumas melodias de jakuwy (jakuli), a música que tradicionalmente é tocada com a flauta katẽntiri pelos homens e cantada pelas mulheres. Elas foram as esposas do finado Tapura, quem foi cacique da aldeia Japuira e também um tocador de katẽntiri muito respeitado.
Kamũnũ and Paatau perform some melodies of jakuwy (jakuli), a type of music traditionally played by men on the katẽntiri reed pipe and sung by women. They were both married to the deceased Tapura, chief of the village of Japuira and a highly respected player of katẽntiri.
Axion dark matter search using arm cavity transmitted beams of gravitational wave detectors
Creators: name: Nagano, Koji
name: Nakatsuka, Hiromasa
name: Morisaki, Soichiro
name: Fujita, Tomohiro
name: Michimura, Yuta
name: Obata, Ippei
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Instrumentation and Detectors (physics.ins-det)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Axion is a promising candidate for ultralight dark matter which may cause a polarization rotation of laser light. Recently, a new idea of probing the axion dark matter by optical linear cavities used in the arms of gravitational wave detectors has been proposed [Phys. Rev. Lett. 123, 111301 (2019)]. In this article, a realistic scheme of the axion dark matter search with the arm cavity transmission ports is revisited. Since photons detected by the transmission ports travel in the cavity for odd-number of times, the effect of axion dark matter on their phases is not cancelled out and the sensitivity at low-mass range is significantly improved compared to the search using reflection ports. We also take into account the stochastic nature of the axion field and the availability of the two detection ports in the gravitational wave detectors. The sensitivity to the axion-photon coupling, $g_{aγ}$, of the ground-based gravitational wave detector, such as Advanced LIGO, with 1-year observation is estimated to be $g_{aγ} \sim 3\times10^{-12}$ GeV$^{-1}$ below the axion mass of $10^{-15}$ eV, which improves upon the limit achieved by the CERN Axion Solar Telescope.
description: 10 pages, 4 figures
Isotope shifts for ${}^1S_0-{}^3P_{0,1}^o$ Yb lines from multi-configuration Dirac-Hartree-Fock calculations
Creators: name: Schelfhout, Jesse S.
name: McFerran, John J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Relativistic multiconfiguration Dirac-Hartree-Fock (MCDHF) calculations with configuration interaction (CI) are carried out for the $^{1}S_{0}$ and $^{3}P_{0,1}^o$ states in neutral ytterbium by use of the available GRASP2018 package. From the resultant atomic state functions and the RIS4 extension, we evaluate the mass and field shift parameters for the $^{1}S_{0}-\,^{3}P_{0}^o$ (clock) and $^{1}S_{0}-\,^{3}P_{1}^o$ (intercombination) lines. We present improved estimates of the nuclear charge parameters, $λ^{A,A'}$, and differences in mean-square charge radii, $δ\langle r^2\rangle^{A,A'}$, and examine the second-order hyperfine interaction for the $^{3}P_{0,1}^o$ states. Isotope shifts for the clock transition have been estimated by three largely independent means from which we predict the unknown clock line frequencies in bosonic Yb isotopes. Knowledge of these line frequencies has implications for King plot nonlinearity tests and the search for beyond Standard-Model signatures.
description: 14 pages, 3 figures; introduction amended and minor changes made to article text
MHD Flow Regimes in Annular Channel
Creators: name: Zhang, Kaiyu
name: Wang, Yibai
name: Tang, Haibin
name: Yang, Lijun
Publisher: name: arXiv
Year: 2021
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: One method and two results are contributed to the complete understanding about MHD laminar flow in annular channel with transverse magnetic field in this paper. In terms of the method, a computationally cheap semi-analytic algorithm is developed based on spectral method and perturbation expansion. By virtue of the fast computation, dense cases with almost continuous varying Hartmann number $M$, Reynolds number $Re$ and cross-section ratio $η$ are calculated to explore the flow patterns that are missed in previous research. In terms of the results of inertialess regime, we establish the average velocity map and electric-flow coupling delimitation in $η$-$M$ space. Seven phenomenological flow patterns and their analytical approaches are identified. In terms of the results of inertial regime, we examine the law of decreasing order-of-magnitude of inertial perturbation on primary flow with increasing Hartmann number. The proposed semi-analytic solution coincides with the $Re^2/M^{4}$ suppression theory of Baylis & Hunt (J. Fluid Mech., vol. 43, 1971, pp. 423-428) in the case of $M<40$. When $M>40$, the pair of trapezoid vortices of secondary flow begins to crack and there is therefore a faster drop in inertial perturbation as $Re^2/M^{5}$, which is a new suppression theory. When $M>80$, the anomalous reverse vortices are fully developed near Shercliff layers resulting in the slower suppression mode of $Re^2/M^{2.5}$, which confirms the prediction of Tabeling & Chabrerie (J. Fluid Mech., vol. 103, 1981, pp. 225-239).
Η θέση η λειτουργία και η δημιουργία του παιδικού τραγουδιού στο σχολείο
Creators: name: Σαμαράς, Σταμάτιος Ιωάννη
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Δημιουργία
Παιδικό τραγούδι
Σχολείο
Creation
Children's song
School

description: Η παρούσα διατριβή κάνει μια προσπάθεια να αναδείξει από την μια πλευρά την σπουδαιότητα του παιδικού τραγουδιού στην εκπαιδευτική διαδικασία και ιδιαίτερα της γλώσσας και από την άλλη έναν εύκολο τρόπο δημιουργίας παιδικών τραγουδιών με την συμμετοχή των μαθητών. Το πρώτο μέρος της διατριβής (θεωρητικό) στην αρχή ασχολείται με την μουσική γενικότερα, και την σχέση της με την γλώσσα και την ποίηση. Στην συνέχεια διαπιστώνει την διαχρονικότητα του παιδικού τραγουδιού, μελετά την μουσική εκπαίδευση και αγωγή στα διάφορα μουσικοπαιδαγωγικά συστήματα αναφέροντας τις απόψεις των μουσικοπαιδαγωγών για το θέμα. Ακόμη αναφέρεται αναλυτικά στην ευεργετική συμβολή του παιδικού τραγουδιού στην διαδικασία εκμάθησης της γλώσσας. Το δεύτερο μέρος (δημιουργικό) παρουσιάζει και αναλύει εύκολους τρόπους δημιουργίας παιδικών τραγουδιών. Δίνει αρκετές ιδέες για την παραγωγή στίχων και παράλληλα εύκολους τρόπους επένδυσης των στίχων αυτών με απλές μελωδίες με σκοπό να δημιουργηθούν τραγούδια. Στο τέλος παρουσιάζονται έξι παιδικά τραγούδια σε έντυπη σε ηχητική (mp3) και οπτική (karaoke) μορφή τα οποία δημιουργήθηκαν ακολουθώντας τις παραπάνω προτεινόμενους τρόπους.
description: This dissertation attempts to highlight both the importance of children's singing in the educational process and especially the Greek language and an easy way to create children's songs with the participation of the pupils. The first part of the dissertation (theoretical) at the beginning deals with music in general and its relation to language and poetry. Then the intertemporal value of children's songs is pointed out,. Music education and education in the various musical pedagogical systems, the views of the music educators on the subject are also mentioned. In other words it refers in detail to the beneficial contribution of children's song to the language learning process. The second part (creative) presents and analyzes easy ways to create children's songs. It gives a lot of ideas for producing verses and also easy ways of lining these verses with simple melodies in order to create songs. At the end, six children's songs are printed in audio (mp3) and visual (karaoke) formats that were created following the above suggested ways.
Fallback supernova assembly of heavy binary neutron stars and light black hole-neutron star pairs and the common stellar ancestry of GW190425 and GW200115
Creators: name: Vigna-Gómez, Alejandro
name: Schrøder, Sophie L.
name: Ramirez-Ruiz, Enrico
name: Aguilera-Dena, David R.
name: Batta, Aldo
name: Langer, Norbert
name: Willcox, Reinhold
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The detection of the unusually heavy binary neutron star merger GW190425 marked a stark contrast to the mass distribution from known Galactic pulsars in double neutron star binaries and gravitational-wave source GW170817. We suggest here a formation channel for heavy binary neutron stars and light black hole - neutron star binaries in which massive helium stars, which had their hydrogen envelope removed during a common envelope phase, remain compact and avoid mass transfer onto the neutron star companion, possibly avoiding pulsar recycling. We present three-dimensional simulations of the supernova explosion of the massive stripped helium star and follow the mass fallback evolution and the subsequent accretion onto the neutron star companion. We find that fallback leads to significant mass growth in the newly formed neutron star. This can explain the formation of heavy binary neutron star systems such as GW190425, as well as predict the assembly of light black hole - neutron star systems such as GW200115. This formation avenue is consistent with the observed mass-eccentricity correlation of binary neutron stars in the Milky Way. Finally, avoiding mass transfer suggests an unusually long spin-period population of pulsar binaries in our Galaxy.
description: 7 main pages, 3 main figures, plus appendices. Accepted for publication in ApJ Letters
The Bactrian Effect: Multiple Resonances and Light Dirac Dark Matter
Creators: name: Rizzo, Thomas G.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The possibility of light dark matter (DM) annihilating through a dark photon (DP) which kinetically mixes (KM) with the Standard Model (SM) hypercharge field is a very attractive scenario. For DM in the interesting mass range below $\sim 1$ GeV, it is well known that bounds from the CMB provide a very strong model building constraint forcing the DM annihilation cross section to be roughly 3 orders of magnitude below that needed to reproduce the observed relic density. Under most circumstances this removes the possibility of an $s$-wave annihilation process for DM in this mass range as would be the case, e.g., if the DM were a Dirac fermion. In an extra-dimensional setup explored previously, it was found that the $s$-channel exchange of multiple gauge bosons could simultaneously encompass a suppressed annihilation cross section during the CMB era while also producing a sufficiently large annihilation rate during freeze-out to recover the DM relic density. In this paper, we analyze more globally the necessary requirements for this mechanism to work successfully and then realize them within the context of a simple model with two `dark' gauge bosons having masses of a similar magnitude and whose contributions to the annihilation amplitude destructively interfere. We show that if the DM mass threshold lies appropriately in the saddle region of this destructive interference between the two resonance humps it then becomes possible to satisfy these requirements simultaneously provided several ancillary conditions are met. The multiple constraints on the parameter space of this setup are then explored in detail to identify the phenomenologically successful regions.
description: 26 pages, 12 figs; figure and discussion added, typos removed
Ανάλυση μοντέλων εξάπλωσης
Creators: name: Αράτζιας, Σωκράτης Ιωάννη
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Μοντέλα
Ενδημία
Εξάπλωση
Models
Endemic
Spread

description: Τις τελευταίες δεκαετίες παρατηρείται σημαντική ανάπτυξη της έρευνας σε μοντέλα εξάπλωσης σε διάφορους τομείς όπως εξάπλωση επιδημιών, μεταβίβαση πληροφορίας, κοινωνικά δίκτυα, οικοσυστήματα, εξάπλωση φήμης και εξάπλωση ιών στον Παγκόσμιο Ιστό. Στόχος της παρούσας εργασίας είναι η διερεύνηση της σχέσης των μαθηματικών μοντέλων εξάπλωσης με την πραγματικότητα και η αποσαφήνιση των εκάστοτε παραδοχών οι οποίες οδηγούν σε μεγάλες διαφοροποιήσεις των συγκεκριμένων εξισώσεων. Παρουσιάζονται συστηματικά οι παραδοχές, οι εξισώσεις, οι ερμηνείες των παραμέτρων καθώς και ορισμένα αξιοσημείωτα συμπεράσματα που προέκυψαν.
description: During the last decades, the spread models have been developed significantly by adaptation to various scientific disciplines like disease propagation, rumor propagation in social networks and virus / worm propagation in computer networks. In the present thesis, we provide an extensive and detailed review of the specific dynamic models. We highlight and distinguish the basic assumptions of the models, the corresponding differential equations and the variables and parameters.
Διερεύνηση παραγόντων που επηρεάζουν τη χρήση πεζογεφυρών στο αστικό οδικό δίκτυο
Creators: name: Σκανδάμη, Μαρία Ουρανία Φωτίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Πεζογέφυρα
Ασφάλεια πεζών
Διάσχιση οδού
Pedestrian bridge
Pedestrian safety
Crossing the road

description: Η παρούσα Διπλωματική Εργασία αποσκοπεί στη διερεύνηση παραγόντων που επηρεάζουν τη χρήση πεζογεφυρών στο αστικό περιβάλλον. Για την εκπόνηση της Διπλωματικής Εργασίας επιλέχθηκε μία πεζογέφυρα στην ανατολική πλευρά της πόλης της Θεσσαλονίκης. Εκατέρωθεν της συγκεκριμένης πεζογέφυρας υπάρχουν δύο σηματοδοτούμενοι κόμβοι με ισόπεδες διαβάσεις για τους πεζούς. Αρχικά μετρήθηκαν οι φόρτοι και η ταχύτητα των οχημάτων που διέρχονται από την οδό και οι ροές των πεζών στους τρεις τρόπους διάσχισης στο συγκεκριμένο τμήμα της οδού (οι δύο διαβάσεις και η πεζογέφυρα). Το ποσοστό χρήσης της πεζογέφυρας με βάση τις μετρήσεις πεδίου βρέθηκε ίσο με 10%. Ακολούθησε έρευνα ερωτηματολογίου, η οποία αφορούσε στους πεζούς που διέρχονταν με έναν από τους τρεις τρόπους διάσχισης της οδού (συλλέχθηκαν 130 ερωτηματολόγια). Περίπου οι μισοί (49%) από τους πεζούς που ρωτήθηκαν δήλωσαν πως δε διασχίζουν ποτέ την πεζογέφυρα. Βρέθηκε ότι οι σημαντικότεροι παράγοντες που επηρεάζουν τους πεζούς στην απόφασή τους με ποιον τρόπο θα διασχίσουν την οδό είναι η ένδειξη του φωτεινού σηματοδότη για τους πεζούς, η ταχύτητα των οχημάτων και ο φόρτος των οχημάτων που διέρχονται από την οδό. Οι περισσότεροι (87%) θεωρούν την πεζογέφυρα πολύ ασφαλή, παρόλο που δεν την χρησιμοποιούν. Στην αξιολόγηση της πεζογέφυρας παίζει πολύ σημαντικό ρόλο και η συνήθεια, όσο συχνότερα χρησιμοποιεί κάποιος την πεζογέφυρα, τόσο πιο εύκολη θεωρεί τη χρήση της. Οι ισόπεδες διαβάσεις που υπάρχουν σε μικρές αποστάσεις από την πεζογέφυρα, αποτρέπουν τους πεζούς από τη χρήση της.
description: The Diploma Thesis was designed to find out factors that influence the use of pedestrian bridges in urban environment. For the elaboration of this study, a pedestrian bridge on the eastern side of Thessaloniki was selected. The study area included two signalized intersections and the pedestrian bridge. Counts were made concerning traffic volume, the vehicle speed and the pedestrian flows. The use rate of the pedestrian bridge was 10% according to the counts. A questionnaire based survey was conducted among pedestrians referring the three ways of crossing the road (2 level crossing and the pedestrian bridge, n=130). Almost half of the pedestrians (49%) said that they never cross the pedestrian bridge. The factors that affect the majority of the pedestrians in their decision, include the indication of the pedestrian traffic light, the traffic volume and the vehicle speed. Most of the pedestrians (87%) consider the pedestrian bridge very safe even though they don’t use it. “Habit” was found to affect the assessment of the pedestrian bridge, the more often someone uses it, the easier they consider its use. The level crossings that are located at short distances of the pedestrian bridge, prevent its use.
Inelastic dark matter scattering off Thallium cannot save DAMA
Creators: name: Jacobsen, Sunniva
name: Freese, Katherine
name: Kelso, Chris
name: Sandick, Pearl
name: Stengel, Patrick
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the compatibility of the observed DAMA modulation signal with inelastic scattering of dark matter (DM) off of the $0.1\%$ Thallium (Tl) dopant in DAMA. In this work we test whether there exist regions of parameter space where the Tl interpretation gives a good fit to the most recent data from DAMA, and whether these regions are compatible with the latest constraints from other direct detection experiments. Previously, Chang et al. in 2010, had proposed the Tl interpretation of the DAMA data, and more recently (in 2019) the DAMA/LIBRA collaboration found regions in parameter space of Tl inelastic scattering that differ by more than $10σ$ from a no modulation hypothesis. We have expanded upon their work by testing whether the regions of parameter space where inelastic DM-Tl scattering gives a good fit to the most recent DAMA data survive the constraints placed by the lack of a DM signal in XENON1T and CRESST-II. In addition, we have tested how these regions change with the main sources of uncertainty: the Tl quenching factor, which has never been measured directly, and the astrophysical uncertainties in the DM distribution. We conclude that inelastic DM scattering off Tl cannot explain the DAMA data in light of null results from other experiments.
description: Added references in sections 1 and 2. Added a comment on the recent results from ANAIS-112
Foliation of a space associated to vertex operator algebra
Creators: name: Zuevsky, A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics

description: We construct the foliation of aspace associated to correlation functions of vertex operator algebras on considered on Riemann surfaces. We prove that the computation of general genus $g$ correlation functions determines a foliation on the space associated to these correlation functions a sewn Riemann surface. Certain further applications of the definition are proposed.
Reconstructing non-repeating radio pulses with Information Field Theory
Creators: name: Welling, Christoph
name: Frank, Philipp
name: Enßlin, Torsten A.
name: Nelles, Anna
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Particle showers in dielectric media produce radio signals which are used for the detection of both ultra-high energy cosmic rays and neutrinos with energies above a few PeV. The amplitude, polarization, and spectrum of these short, broadband radio pulses allow us to draw conclusions about the primary particles that caused them, as well as the mechanics of shower development and radio emission. However, confidently reconstructing the radio signals can pose a challenge, as they are often obscured by background noise. Information Field Theory offers a robust approach to this challenge by using Bayesian inference to calculate the most likely radio signal, given the recorded data. In this paper, we describe the application of Information Field Theory to radio signals from particle showers in both air and ice and demonstrate how accurately pulse parameters can be obtained from noisy data.
Goal-oriented adaptive sampling under random field modelling of response probability distributions
Creators: name: Gautier, Athénaïs
name: Ginsbourger, David
name: Pirot, Guillaume
Publisher: name: arXiv
Year: 2021
Subjects: subject: Methodology (stat.ME)
subject: Optimization and Control (math.OC)
subject: Applications (stat.AP)
subject: Computation (stat.CO)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: In the study of natural and artificial complex systems, responses that are not completely determined by the considered decision variables are commonly modelled probabilistically, resulting in response distributions varying across decision space. We consider cases where the spatial variation of these response distributions does not only concern their mean and/or variance but also other features including for instance shape or uni-modality versus multi-modality. Our contributions build upon a non-parametric Bayesian approach to modelling the thereby induced fields of probability distributions, and in particular to a spatial extension of the logistic Gaussian model. The considered models deliver probabilistic predictions of response distributions at candidate points, allowing for instance to perform (approximate) posterior simulations of probability density functions, to jointly predict multiple moments and other functionals of target distributions, as well as to quantify the impact of collecting new samples on the state of knowledge of the distribution field of interest. In particular, we introduce adaptive sampling strategies leveraging the potential of the considered random distribution field models to guide system evaluations in a goal-oriented way, with a view towards parsimoniously addressing calibration and related problems from non-linear (stochastic) inversion and global optimisation.
Texto: O contato
Creators: name: Mỹky, Paatau
name: Bardagil Mas, Bernat
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2023
Subjects: subject: irn

description: Paatau sobre o contato e a chegada da frente liderade por Thomáz Lisboa e o futuro marido dela, Tapura.
Paatau tells about contact, and the arrival of the expedition led by Thomáz Lisboa and her future husband Tapura.
Η εργαλειοποίηση των ανθρώπινων ασπίδων από τις μη κρατικές ένοπλες ομάδες στο Διεθνές Δίκαιο
Creators: name: Ελευθερίου, Δέσποινα Εμμανουήλ
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Ανθρώπινες ασπίδες
Μη κρατικές ένοπλες ομάδες
Διεθνές Ανθρωπιστικό Δίκαιο
Human shields
Armed non – state groups
International Humanitarian Law

description: Σκοπός της παρούσας διπλωματικής εργασίας ήταν η εξέταση του φαινομένου της εργαλειοποίησης των ανθρώπινων ασπίδων από τις μη κρατικές ένοπλες ομάδες, της χρήσης δηλαδή αμάχων ως ασπίδων κατά τη διάρκεια μιας μη διεθνούς ένοπλης σύγκρουσης. Αρχικά αναλύσαμε τις έννοιες της αρχής της διάκρισης, της προστασίας των αμάχων και της αμέσου ή ενεργούς συμμετοχής στις εχθροπραξίες, προκειμένου να διασαφηνιστούν τα ανωτέρω ζητήματα. Επιπροσθέτως, εξετάσαμε την έννοια της μη κρατικής ένοπλης ομάδας, καθώς και το κανονιστικό πλαίσιο βάσει του οποίου συμμετέχει η τελευταία στις εχθροπραξίες, τόσο από πλευράς Διεθνούς Ανθρωπιστικού Δικαίου, όσο και από πλευράς Δικαίου των Ανθρωπίνων Δικαιωμάτων. Ακολούθως, αναλύσαμε το κύριο θέμα της διπλωματικής εργασίας, αυτό των ανθρώπινων ασπίδων. Εκκινώντας από την εννοιολογική προσέγγιση του όρου και τις διακρίσεις του φαινομένου, οδηγούμαστε στο νομικό πλαίσιο απαγόρευσης και προστασίας των ανθρώπινων ασπίδων, όπου εξετάζονται οι κανόνες του Διεθνούς Ανθρωπιστικού Δικαίου, του Διεθνούς Ποινικού Δικαίου και του Δικαίου των Ανθρωπίνων Δικαιωμάτων. Τέλος, εξετάζονται οι υποχρεώσεις του επιτιθέμενου μέρους καθώς και οι λόγοι που ωθούν τα εμπόλεμα μέρη να χρησιμοποιήσουν ανθρώπινες ασπίδες.
description: The aim of the present dissertation was the study of the instrumentalisation of human shields by armed non – state groups, meaning the use of civilians as human shields during a non - international armed conflict. Firstly, we analysed the concepts of the principle of distinction, the protection of civilians and the notion of direct participation in hostilities, in order to clarify these terms. Furthermore, we examined the concept of armed non – state groups and the legal framework, under which they take part in hostilities, both in terms on International Humanitarian Law and Human Rights Law. Subsequently, we analysed the main subject of the present dissertation, that of human shields. Starting from the conceptual approach of the term and its distinctions, we are guided towards the legal framework for the prohibition and protection of human shields, where we examine the rules of International Humanitarian Law, International Criminal Law and Human Rights Law. Finally, we examine the obligations of the attacking party and the reasons for the enemy parties to use human shields.
Development and examination of sequential approaches for applicability testing of tree volume models
Creators: name: Wang, Yue
Publisher: name: University of British Columbia
Year: 2009

description: In forest inventories, an existing standard volume equation may be considered for appli- cation to a local area (subpopulation), or to the same species in a different geographic region (new population). In order to use a volume model with confidence under these situations, an applicability test must be carried out to determine the actual accuracy of the model. Procedures based on a predetermined, sufficiently large sample of data (fixed sample size procedures) are available. However, since applicability testing is only used to classify a model as either acceptable or unacceptable, it is likely that a testing decision can be made with a smaller sample size, especially when the actual accuracy of the model is far below or above the user’s requirement. This is particularly of concern when data collection for model checking is very expensive, time-consuming or destructive. As an alternative, three sequential accuracy testing plans (SATP) were developed by extending Freese’s (1960) accuracy tests using Wald’s (1947) sequential probability ratio tests (SPRT) in this thesis. Observations are taking sequentially, and at each stage of sampling, a decision of whether to accept or reject the model, or to continue sampling, is made. The SATP procedures are potentially superior to a fixed sample size procedure in terms of lower sample sizes. Approximate Operating Characteristic (OC) and Average Sample Number (ASN) equations were also suggested to assist the potential users of the SATP procedures in choosing appropriate tested parameters for a given problem. The simulation results using normal distribution generators showed that the SATP procedures are reliable for classifying a volume model as either acceptable or unacceptable based on two pre-set limits of the accuracy requirement. Also, on average, the use of the SATP procedures will result in a 40 to 60% of sampling cost-saving compared to an equally reliable conventional fixed sample size procedure. A detailed example is given to illustrate the application of the SATP procedures.
Discussion: The Dantzig selector: Statistical estimation when $p$ is much larger than $n$
Creators: name: Friedlander, Michael P.
name: Saunders, Michael A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics

description: Discussion of ``The Dantzig selector: Statistical estimation when $p$ is much larger than $n$'' [math/0506081]
description: Published in at http://dx.doi.org/10.1214/009053607000000479 the Annals of Statistics (http://www.imstat.org/aos/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Statistical privacy-preserving message dissemination for peer-to-peer networks
Creators: name: Mödinger, David
name: Lorenz, Jan-Hendrik
name: Hauck, Fanz J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: Concerns for the privacy of communication is widely discussed in research and overall society. For the public financial infrastructure of blockchains, this discussion encompasses the privacy of transaction data and its broadcasting throughout the network. To tackle this problem, we transform a discrete-time protocol for contact networks over infinite trees into a computer network protocol for peer-to-peer networks. Peer-to-peer networks are modeled as organically growing graphs. We show that the distribution of shortest paths in such a network can be modeled using a normal distribution $\mathcal{N}(μ,σ^2).$ We determine statistical estimators for $μ,σ$ via multivariate models. The model behaves logarithmic over the number of nodes n and proportional to an inverse exponential over the number of added edges k. These results facilitate the computation of optimal forwarding probabilities during the dissemination phase for optimal privacy in a limited information environment.
description: 6 figures, 19 pages, single column
A prototype of an automatic mattress turning device:astudy of interface pressure at bony prominences in normal subjects
Creators: name: Apichana Kovindha
Publisher: name: Asia-Pacific Journal of Science and Technology
Year: 2019
Subjects: nterface pressure,assistive device,repositioning,pressure ulcer,automatic mattress turning device

description: Asia-Pacific Journal of Science and Technology, 24, 2, 1-6