cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Ναρκισσισμός και αυτοεκτίμηση: Ξετυλίγοντας το νήμα της μεταξύ τους σχέσης:
Creators: name: Καρκανεβάτος, Ιάκωβος Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2014
Subjects: Ναρκισσισμός
Αυτοεκτίμηση
Εξατομικευμένος Εαυτός
Narcissism
Self-Esteem
Agency

description: Στην παρούσα εργασία διερευνήσαμε τη σχέση του ναρκισσισμού με την αυτοεκτίμηση. Για το σκοπό αυτό πραγματοποιήσαμε δύο μελέτες. Στην πρώτη μελέτη σε δείγμα 66 ατόμων εξετάσαμε τη θεωρία σύμφωνα με την οποία τα άτομα με ναρκισσισμό χαρακτηρίζονται από ασύμφωνη υψηλή αυτοεκτίμηση, δηλαδή από υψηλή έκδηλη αυτοεκτίμηση και χαμηλή άδηλη αυτοεκτίμηση. Στη δεύτερη μελέτη σε δείγμα 103 ατόμων εξετάσαμε τη σχέση του ναρκισσισμού και της αυτοεκτίμησης με δύο διαστάσεις της προσωπικότητας, τον εξατομικευμένο εαυτό και τον από κοινού εαυτό, καθώς και με τις ακραίες πλευρές των δύο αυτών διαστάσεων: τον ακραία εξατομικευμένο εαυτό και τον ακραία από κοινού εαυτό. Η πρώτη μελέτη έδειξε ότι η αλληλεπίδραση μεταξύ της έκδηλης αυτοεκτίμησης και της άδηλης αυτοεκτίμησης δεν προβλέπει το ναρκισσισμό. Η δεύτερη μελέτη έδειξε ότι τα άτομα με υψηλή αυτοεκτίμηση χαρακτηρίζονται από υψηλό εξατομικευμένο εαυτό και χαμηλό ακραία από κοινού εαυτό, ενώ τα άτομα με ναρκισσισμό χαρακτηρίζονται όχι μόνο από υψηλό εξατομικευμένο εαυτό και χαμηλό ακραία από κοινού εαυτό, αλλά και από υψηλό ακραία εξατομικευμένο εαυτό, και από χαμηλό από κοινού εαυτό. Τα αποτελέσματα συζητούνται με βάση τόσο τη θεωρία όσο και τη βιβλιογραφία για το ναρκισσισμό και την αυτοεκτίμηση.
description: In the present study we investigated the relationship between narcissism and self-esteem. For this purpose, we conducted two studies. In the first study in sample of 66 individuals we examined the theory according to which the individuals with narcissism are characterized by discrepant high self-esteem that is to say by high explicit self-esteem and low implicit self-esteem. In the second study in a sample of 103 subjects we examined the relationship between narcissism and self-esteem with two dimensions of personality, agency and communion, as well as with the end sides of these two dimensions: unmitigated agency and unmitigated communion. The first study showed that the interaction between explicit self-esteem and implicit self-esteem does not predict narcissism. The second study showed that the individuals with high self-esteem are characterized by high agency and low unmitigated communion, while the individuals with narcissism are characterized not only by high agency and low unmitigated communion, but also by high unmitigated agency, and low communion. The results are discussed on the basis of both the theory and the literature on narcissism and self-esteem.
Effect of the Trace Anomaly on the Cosmological Constant
Creators: name: Koksma, Jurjen F.
name: Prokopec, Tomislav
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: It has been argued that the quantum (conformal) trace anomaly could potentially provide us with a dynamical explanation of the cosmological constant problem. In this paper, however, we show by means of a semiclassical analysis that the trace anomaly does not affect the cosmological constant. We construct the effective action of the conformal anomaly for flat FLRW spacetimes consisting of local quadratic geometric curvature invariants. Counterterms are thus expected to influence the numerical value of the coefficients in the trace anomaly and we must therefore allow these parameters to vary. We calculate the evolution of the Hubble parameter in quasi de Sitter spacetime, where we restrict our Hubble parameter to vary slowly in time, and in FLRW spacetimes. We show dynamically that a Universe consisting of matter with a constant equation of state, a cosmological constant and the quantum trace anomaly evolves either to the classical de Sitter attractor or to a quantum trace anomaly driven one. When considering the trace anomaly truncated to quasi de Sitter spacetime, we find a region in parameter space where the quantum attractor destabilises. When considering the exact expression of the trace anomaly, a stability analysis shows that whenever the trace anomaly driven attractor is stable, the classical de Sitter attractor is unstable, and vice versa. Semiclassically, the trace anomaly does not affect the classical late time de Sitter attractor and hence it does not solve the cosmological constant problem.
description: 18 pages, 11 figures, published version
Courtship with two spoons—Anatomy and presumed function of the bizarre antennae of Cardiocondyla zoserka ant males
Creators: name: Heinze, Jürgen
name: Marschall, Jella
name: Lautenschläger, Birgit
name: Seifert, Bernhard
name: Gratiashvili, Nana
name: Strohm, Erhard
Publisher: name: Universität Regensburg
Year: 2021
Subjects: subject: 570 Biowissenschaften, Biologie
subject: 590 Tiere (Zoologie)

description: Mating in ants often occurs on the wing during nuptial flights or on the ground when scattered female sexuals attract males by pheromones. In both scenarios, there is little opportunity for males to engage in prolonged aggressive competition or elaborate courtship displays. Male morphology is therefore adapted to locating female sexuals and mating, and it lacks specific weapons or other traits associated with courtship. In contrast, sexuals of the ant genus Cardiocondyla typically mate in their natal nests. As a consequence, in many species winged males have been replaced by wingless fighter or territorial males, which kill or expel rival males with their strong mandibles and show complex mating behavior. However, no wingless males are known from Cardiocondyla zoserka from West Africa, and instead, winged males have evolved a bizarre secondary sexual trait: uniquely shaped antennae with spoon-like tips that show heavily sculptured ventral surfaces with numerous invaginations. We here report on the courtship behavior of C. zoserka males and describe antennal glands with class 3 gland cells, which presumably secrete a close range sex pheromone. Antennal glands have not yet been found in males of other ant species, including a close relative of C. zoserka, suggesting that in ants with intranidal mating sexual selection can rapidly lead to highly divergent adaptations and the evolution of novel structures.
Some solvable automaton groups
Creators: name: Bartholdi, Laurent
name: Šunik, Zoran
Publisher: name: arXiv
Year: 2006
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20E08, 68Q70, 20F05

description: It is shown that certain ascending HNN extensions of free abelian groups of finite rank, as well as various lamplighter groups, can be realized as automaton groups, i.e., can be given a self-similar structure. This includes the solvable Baumslag-Solitar groups BS(1,m), for m not +/-1. In addition, it is shown that, for any relatively prime integers m,n>=2, the pair of Baumslag-Solitar groups BS(1,m) and BS(1,n) can be realized by a pair of dual automata. The examples are then used to illustrate more general connections between Schreier graphs, composition of automata and dual automata.
description: Minor corrections on which Baumslag-Solitar groups are realized by automata
APPENDIX
Creators: name: Asl, Mahdi Ghaemi
Publisher: name: figshare
Year: 2021
Subjects: subject: 140205 Environment and Resource Economics
subject: FOS: Economics and business

description: APPENDIX

1. Appendix A: Part of the methodology1.1. Government Response Tracker Index (OxCGRT)1.2. Partial hypothetical extraction

2. Appendix B: Supplementary Information2.1. Status of each sector2.2. The heatmap of countries' sectors
Characterizing key developmental understandings and pedagogically powerful ideas within a statistical knowledge for teaching framework
Creators: name: Groth, Randall E.
Publisher: name: Maryland Shared Open Access Repository
Year: 2013
Subjects: statistical knowledge for teaching
key developmental understanding
pedagogy

description: A hypothetical framework to characterize statistical knowledge for teaching (SKT) is described. Empirical grounding for the framework is provided by artifacts from an undergraduate course for prospective teachers that concentrated on the development of SKT. The theoretical notion of “key developmental understanding” (KDU) is used to identify landmarks in the development of SKT subject matter knowledge. Sample KDUs are given for the subject matter knowledge categories of common content knowledge, specialized content knowledge, and horizon knowledge. The theoretical notion of “pedagogically powerful idea” is used to describe how KDUs must be transformed to become useful in teaching. Examples of pedagogically powerful ideas for the pedagogical content knowledge categories of knowledge of content and teaching and curriculum knowledge are provided. Knowledge of content and students is hypothesized as a basis for the development of pedagogically powerful ideas.
A Theory of Flavour and Set of the Interaction Structural Parts
Creators: name: Sharafiddinov, Rasulkhozha S.
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: At the availability of a sharp interconnection, the difference in sizes with Dirac and Pauli form factors of a massive neutrino must constitute their linearly ordered set. Such a class of currents can lead in the field of a spinless nucleus to the constitution of a partially ordered set consisting of cross sections of polarized and unpolarized neutrino scattering. We discuss a theory, in which flavor conservation is predicted as a theorem about the equality of cross sections of the interaction with a gauge boson of leptonic current structural components. This theorem relates flavor and mirror symmetries as a consequence of force unification forming the two left-(right-) handed fermions in individual difermions. Thereby, it requires one to follow the logic of a true nature of elementary particles from the point of view of a flavor dynamics of all types of micro-world symmetry laws.
description: 10 pages, LaTex, Published version in J. Phys. Nat. Sci
Percolation routing in a three-dimensional multicomputer network topology using optical interconnection
Creators: name: Lu, Mi
Publisher: name: figshare
Year: 2021
Subjects: subject: 80302 Computer System Architecture
subject: FOS: Computer and information sciences

description: We investigate the network communication behavior of a three-dimensional (3D) multicomputer system using optical interconnection in which faulty nodesare left in place, a concept called “fail-in-place.” We call this the percolation problem in which various amounts of missing nodes fixed in position in the network may have a dramatic effect on the network’s ability to transport data effectively. As the number of failed nodes increases, data have to bererouted through intermediate nodes creating potential “hot spots.” These hot spots become the bottleneck that degrades performance. The ability to absorb rerouted data without ejecting it from the network is critical in massivelyparallel computing systems. Optical technology is a promising solution for internode communication with extraordinarily quick response time supportingenormous bandwidth. To adopt it in multiprocessor systems, efficient routing techniques are needed. We adapt self-routing strategies for all-optical packet routing in 3D mesh networks and investigate the percolation properties. Toachieve percolation routing, we incorporate the features inherent in optics to achieve decoding and routing capability in real time. The objective is to develop a dynamic communication environment that adapts and evolves with a high density of missing units or nodes, and by employing analytical, experimental, and simulation methods, show that optical interconnection in a dense 3D system reduces considerably this percolation problem.
Spider : An agent-based message-passing architecture
Creators: name: Birsan, Dorian
Publisher: name: University of British Columbia
Year: 2009

description: Communication is a driving force in the high-performance parallel computing environment of the 90's. Obtaining good performance eventually requires optimizing communication, hence the importance of controlling network resources. Current network designs offer a closed, rigid interface that emphasizes hardware solutions for routing, leaving little room for communication control. In this thesis we address interface issues between network hardware and communication software. An open, flexible interface is proposed, which does not enforce communication policies, but offers mechanisms for user control over messaging. Control is exerted by programming the network, using a message-centered approach, as opposed to traditional node-centered approaches. This distinction is based on where the control lies: in the message or in the node. Messages are no longer passively communicated from source to destination, but are instead active, intelligent, and self-routing. We call them communication agents. SPIDER (Simple Programmable Interface Design for Efficient Routing) is a user-programmable routing kernel that supports the message-centered programming paradigm with communication agents. We present a general design and a system prototype for a transputerbased multicomputer. The implementation was used to explore the benefits of programming the network. It was found that the paradigm has expressive power for solving communication tasks, is general, reliable and can improve performance in communication-intensive applications.
Latest results from NA60
Creators: name: Foerster, A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The NA60 experiment has measured the production of muon pairs and of charged particles in In+In collisions at a beam energy of 158 AGeV. For invariant dimuon masses below the phi the space-time averaged rho spectral function was isolated by a novel procedure. It shows a strong broadening but essentially no shift in mass. The production of J/psi was measured as a function of the collision centrality. As in previous experiments studying Pb+Pb collisions an anomalous supression is observed, setting in at approximately 90 participant nucleons. Using the charged particles the reaction plane was reconstructed. The elliptic flow of charged particles increases with pt showing a saturation for pt > 2GeV/c. For the first time azimuthal distributions for J/psi are shown.
description: 9 pages, 11 figures, talk given at the conference "Strangeness in Quark Matter 2006 (SQM2006)", March 2006, Los Angeles, USA, accepted for publication in Journal of Physics G
Aκουστική ανάλυση φωνής ασθενών με σπασμωδική δυσφωνία προσαγωγικού τύπου.:
Creators: name: Γκαϊτατζή, Ολγα Νικολάου
Publisher: name: Aristotle University of Thessaloniki
Year: 2014
Subjects: Σπασμωδική δυσφωνία προσαγωγικού τύπου
Λογισμικό PRAAT
Έγχυση BOTOX
Ακουστική ανάλυση
Αdductor spasmodic dysphonia (ADSD)
PRAAT software
BOTOX injection
Acoustic analysis
Έντυπα και cd με ελλιπή στοιχεία δεν γ

description: Σκοπός της παρούσας διπλωματικής εργασίας είναι η ακουστική ανάλυση φωνής ασθενών με σπασμωδική δυσφωνία προσαγωγικού τύπου με τη βοήθεια του λογισμικού PRAAT. Αναλύθηκαν δείγματα φωνής παρατεταμένης φώνησης του φωνήεντος /α/ και ανάγνωσης κειμένου για 3 ασθενείς με διεγνωσμένη σπασμωδική δυσφωνία πρίν την θεραπεία τους με έγχυση BOTOX. Επίσης για έναν από τους ασθενείς αναλύθηκαν επιπλέον δείγματα φώνησης από το 1 έως τον 30 αριθμό και τραγουδιστής φωνής και συγκεκριμένα ψαλμωδίας. Τα ακουστικά δείγματα αναλύθηκαν με τη βοήθεια του λογισμικού PRAAT και τα δεδομένα που εξάχθηκαν επεξεργάστηκαν και αναλύθηκαν στατιστικά σε αρχεία excel ώστε να υπολογιστούν ακουστικές παράμετροι και να συγκριθούν με παρόμοιες βιβλιογραφικές μελέτες. Τα αποτελέσματα παρατίθενται αναλυτικά και βάση αυτών γίνεται η τελική αξιολόγηση.
description: The purpose of this diplomatic thesis is the acoustic analysis of the voice of patients with adductor spasmodic dysphonia (ADSD) with the use of PRAAT software. The voice samples analysesd were: sustained phonation of the vowel / a / and reading passage of 3 patients diagnosed with adductor spasmodic dysphonia before the treatment with BOTOX injection. Additionally for one of the patients samples of phonation from number 1 to 30 and of singing voice (Byzantine music chant) were analyzed The audio samples were analyzed with PRAAT software and extracted data were analyzed statistically in excel to calculate acoustic parameters, in order to be compared with similar literature studies. The results are presented analytically and based on them occurs the final evaluation
A route to observing ponderomotive entanglement with optically trapped mirrors
Creators: name: Wipf, Christopher
name: Corbitt, Thomas
name: Chen, Yanbei
name: Mavalvala, Nergis
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The radiation pressure of two detuned laser beams can create a stable trap for a suspended cavity mirror; here it is shown that such a configuration entangles the output light fields via interaction with the mirror. Intra-cavity, the opto-mechanical system can become entangled also. The degree of entanglement is quantified spectrally using the logarithmic negativity. Entanglement survives in the experimentally accessible regime of gram-scale masses subject to thermal noise at room temperature.
description: 4 pages, 4 figures
Dasgupta, Sangeeta: Reordering Adivasi Worlds: Representation, Resistance, Memory
Creators: name: Xaxa, Virginius
Publisher: name: Zeitschrift für Ethnologie/Journal of Social and Cultural Anthropology
Year: 2024

description: Zeitschrift für Ethnologie/Journal of Social and Cultural Anthropology, Bd. 149 Nr. 1 (2024): Zeitschrift für Ethnologie/Journal of Social and Cultural Anthropology
Επιχειρηματική Ευφυΐα:
Creators: name: Δόντσιου, Ιωάννα Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2014
Subjects: Επιχειρηματική
Ευφυΐα
Νοημοσύνη
Business
Intelligence
BI

description: Σκοπός της παρούσας διπλωματικής μελέτης ήταν η ανάλυση των εννοιών της Επιχειρηματικής Ευφυΐας. Ειδικότερα, δόθηκε έμφαση στη σημασία της για τις επιχειρήσεις και παρουσιάστηκαν οι βασικές εφαρμογές της. Επιπλέον, αναλύθηκαν τα βασικά χαρακτηριστικά των συστημάτων της Επιχειρηματικής Ευφυΐας και οι δυνατότητές τους. Κατόπιν, ακολούθησε η παρουσίαση διάφορων λογισμικών προϊόντων που κυκλοφορούν στην αγορά και έγινε η σύγκριση δύο προϊόντων ανοικτού κώδικα, της Pentaho και της Jaspersoft, και καταγράφηκαν συμπεράσματα.
description: The aim of the present thesis was the analysis of the meaning of Business Intelligence (BI). More specifically, accent was given in the importance of BI for the enterprises and its basic applications were presented. Moreover, we analyzed the basic characteristics of BI systems and their capacity. Then, the presentation of various software products followed and two of them, open source software Pentaho and Jaspersoft, were compared and conclusions were written down.
U.S. Farm Programs and Agricultural Resources
Creators: name: Shoemaker, Robbin
name: Anderson, Margot
name: Hrubovcak, James
name: Shoemaker, Robbin
name: Anderson, Margot
name: Hrubovcak, James
Publisher: name: Unknown
Year: 1990
Subjects: Agricultural and Food Policy
Crop Production/Industries
Financial Economics
Land Economics/Use

description: "What is the effect of U.S. agricultural support programs on land, input use, and production in agriculture?" U.S. agricultural support programs have a greater effect on land and other farm inputs than on commodity production. Commodity programs have Increased land values and encouraged the substitution of other Inputs such as farm chemicals for land. Agricultural support programs raise total farm income, but in their absence, commodity production would decline, prices would rise, and the mix of crops would change as program crop producers shift to other crops.
Dust Stratification in Young Circumstellar Disks
Creators: name: Rettig, T.
name: Brittain, S.
name: Simon, Theodore
name: Gibb, E.
name: Balsara, D. S.
name: Tilley, D. A.
name: Kulesa, C.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present high-resolution infrared spectra of four YSOs (T Tau N, T Tau S, RNO 91, and HL Tau). The spectra exhibit narrow absorption lines of 12CO, 13CO, and C18O as well as broad emission lines of gas phase12CO. The narrow absorption lines of CO are shown to originate from the colder circumstellar gas. We find that the line of sight gas column densities resulting from the CO absorption lines are much higher than expected for the measured extinction for each source and suggest the gas to dust ratio is measuring the dust settling and/or grain coagulation in these extended disks. We provide a model of turbulence, dust settling and grain growth to explain the results. The techniques presented here allow us to provide some observationally-motivated bounds on accretion disk alpha in protostellar systems.
On the Hardness of PAC-learning Stabilizer States with Noise
Creators: name: Gollakota, Aravind
name: Liang, Daniel
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Data Structures and Algorithms (cs.DS)
subject: Machine Learning (cs.LG)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: We consider the problem of learning stabilizer states with noise in the Probably Approximately Correct (PAC) framework of Aaronson (2007) for learning quantum states. In the noiseless setting, an algorithm for this problem was recently given by Rocchetto (2018), but the noisy case was left open. Motivated by approaches to noise tolerance from classical learning theory, we introduce the Statistical Query (SQ) model for PAC-learning quantum states, and prove that algorithms in this model are indeed resilient to common forms of noise, including classification and depolarizing noise. We prove an exponential lower bound on learning stabilizer states in the SQ model. Even outside the SQ model, we prove that learning stabilizer states with noise is in general as hard as Learning Parity with Noise (LPN) using classical examples. Our results position the problem of learning stabilizer states as a natural quantum analogue of the classical problem of learning parities: easy in the noiseless setting, but seemingly intractable even with simple forms of noise.
Berger, Stefan and Philipp Müller (eds.): Dynamics of Emigration: Émigré Scholars and the Production of Historical Knowledge in the 20th Century
Creators: name: Stoll, Viktor
Publisher: name: Zeitschrift für Ethnologie/Journal of Social and Cultural Anthropology
Year: 2024

description: Zeitschrift für Ethnologie/Journal of Social and Cultural Anthropology, Bd. 149 Nr. 1 (2024): Zeitschrift für Ethnologie/Journal of Social and Cultural Anthropology
Captured older stars as the reason for apparently prolonged star formation in young star clusters
Creators: name: Pflamm-Altenburg, Jan
name: Kroupa, Pavel
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The existence of older stars within a young star cluster can be interpreted to imply that star formation occurs on time scales longer than a free-fall time of a pre-cluster cloud core. Here the idea is explored that these older stars are not related to the star formation process forming the young star cluster but rather that the orbits of older field stars are focused by the collapsing pre-cluster cloud core. Two effects appear: The focussing of stellar orbits leads to an enhancement of the density of field stars in the vicinity of the centre of the young star cluster. And due to the time-dependent potential of the forming cluster some of these stars can get bound gravitationally to the cluster. These stars exhibit similar kinematical properties as the newly formed stars and can not be distinguished from them on the basis of radial-velocity or proper-motion surveys. Such contaminations may lead to a wrong apparent star-formation history of a young cluster. In the case of the ONC the theoretical number of gravitationally bound older low-mass field stars agrees with the number of observed older low-mass stars.
description: Accepted by MNRAS, 7 pages, 2 figures
PAGER: A Distributed Algorithm for the Dead-end Problem of Location-based Routing in Sensor Networks
Creators: name: Lu, Mi
Publisher: name: figshare
Year: 2021
Subjects: subject: 80302 Computer System Architecture
subject: FOS: Computer and information sciences

description: The dead-end problem is an importance issue oflocation-based routing in sensor network, whichoccurs when a message falls into a local minimumusing greedy forwarding. Current methods for thisproblem are insufficient either in eliminatingtraffic/path memorization or finding satisfied shortpaths. In this paper, we propose a novel algorithm,named Partial-partition Avoiding Geographic Routing(PAGER), to solve the problem. The basic idea ofPAGER is to divide a sensor network graph intofunctional sub-graphs, and provide each sensor nodewith message forwarding directions based on thesesub-graphs. That results in loop-free short pathswithout memorization of traffics/paths in sensor nodes.We implement our algorithm in a protocol andevaluate it in sensor networks with differentparameters. Results show that PAGER generatesconsiderably shorter paths, higher delivery ratio andlower energy consumption than the Greedy PerimeterStateless Routing protocol. At the same time, PAGERachieves better performance in handling large-scalenetwork than the Ad-hoc On-demand Distance Vectorprotocol.
Schick, Johannes F.M., Mario Schmidt and Martin Zillinger (eds.): The Social Origins of Thought: Durkheim, Mauss, and the Category Project
Creators: name: Sprenger, Guido
Publisher: name: Zeitschrift für Ethnologie/Journal of Social and Cultural Anthropology
Year: 2024

description: Zeitschrift für Ethnologie/Journal of Social and Cultural Anthropology, Bd. 149 Nr. 1 (2024): Zeitschrift für Ethnologie/Journal of Social and Cultural Anthropology
The dynamics of three nearby E0 galaxies in refracted gravity
Creators: name: Cesare, Valentina
name: Diaferio, Antonaldo
name: Matsakos, Titos
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences

description: We tested whether refracted gravity, a theory of modified gravity that describes the dynamics of galaxies without the aid of dark matter, can model the dynamics of the three massive elliptical galaxies, NGC 1407, NGC 4486, and NGC 5846, out to $\sim$$10R_{\rm e}$, where the baryonic mass component fades out and dark matter is required in Newtonian gravity. We probed these outer regions with the kinematics of the globular clusters provided by the SLUGGS survey. Refracted gravity mimics dark matter with the gravitational permittivity, a monotonic function of the local mass density depending on three parameters, $ε_0$, $ρ_{\rm c}$, and $Q$, which are expected to be universal. Refracted gravity satisfactorily reproduces the velocity dispersion profiles of the stars and red and blue globular clusters, with stellar mass-to-light ratios in agreement with stellar population synthesis models, and orbital anisotropy parameters consistent with previous results obtained in Newtonian gravity with dark matter. The sets of the three parameters of the gravitational permittivity found for each galaxy are consistent with each other within $\sim$2$σ$. We compare the mean $\{ε_0,Q,\log_{10}\left[ρ_{\rm c}\left(\mathrm{g}\, \mathrm{cm}^{-3}\right)\right]\} = \{0.089^{+0.038}_{-0.035}, 0.47^{+0.29}_{-0.21}, -24.25^{+0.28}_{-0.20}\}$ found here with the means of the parameters required to model the rotation curves and vertical velocity dispersion profiles of 30 disk galaxies from the DiskMass Survey (DMS): $ρ_{\rm c}$ and $Q$ agree within 1$σ$ with the DMS values, whereas $ε_0$ agrees within 3$σ$. This agreement suggests that ellipticals and disk galaxies allow for common values of the parameters of the permittivity and supports the universality of the permittivity function.
description: 19 pages, 9 figures, 7 tables, published in Astronomy & Astrophysics in January 2022, Volume 657, Page A133, accepted for publication on 12 October 2021. v2: changes after refereeing process
Nucleon-Nucleon Interaction: A Typical/Concise Review
Creators: name: Naghdi, M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Nearly a recent century of work is divided to Nucleon-Nucleon (NN) interaction issue. We review some overall perspectives of NN interaction with a brief discussion about deuteron, general structure and symmetries of NN Lagrangian as well as equations of motion and solutions. Meanwhile, the main NN interaction models, as frameworks to build NN potentials, are reviewed concisely. We try to include and study almost all well-known potentials in a similar way, discuss more on various commonly used plain forms for two-nucleon interaction with an emphasis on the phenomenological and meson-exchange potentials as well as the constituent-quark potentials and new ones based on chiral effective field theory and working in coordinate-space mostly. The potentials are constructed in a way that fit NN scattering data, phase shifts, and are also compared in this way usually. An extra goal of this study is to start comparing various potentials forms in a unified manner. So, we also comment on the advantages and disadvantages of the models and potentials partly with reference to some relevant works and probable future studies.
description: 85 pages, 5 figures, than the previous v3 edition, minor changes, and typos fixed
Undergraduates never do anything useful
Creators: name: Littlejohn, George R.
name: Howard, Thomas P.
Publisher: name: F1000Research
Year: 2015

description: There is a common perception in higher education that for those primarily involved in research, particularly early career researchers (ECRs), engagement with undergraduates takes up valuable research time and that contact should be kept to a minimum. This may be summarised in the assertion that, ‘undergraduates never do anything useful’. If approached properly however, engagement with undergraduate research is a mutually rewarding experience. The outcome is enhanced research skills for the student and demonstrable mentoring and project management skills for the ECR. Moreover, research undertaken by undergraduates can be world-leading. Recently, undergraduate researchers were responsible for the construction of the first synthetic eukaryotic chromosome, and published in Science in 2014.

We recently held a workshop for ECRs at the University of Exeter, the outcomes of which we present here. The workshop addressed the negative perception of undergraduate research and set out an approach for ECRs to find creative and productive ways to be involved in Undergraduate Education. Involvement of researchers in student research brings considerable benefits to both parties. The key to successful undergraduate research is to define honestly what resources can be devoted to it and to define a suitable programme of work.  Mary Williams' blog post covering the event here: http://blog.aspb.org/2014/04/28/research-led-teaching-opportunities-for-early-career-researchers/
Sorting real numbers on random access machines
Creators: name: Blumenthal, Daniel S.
Publisher: name: University of British Columbia
Year: 2009

description: This work describes a family, Segment-Sort, of algorithms for rapid sequential sorting of real numbers. Two computational models are discussed which correspond to the two main types of Segment-Sort algorithm: deterministic and random. With the deterministic model, the Basic RAM, it is possible to sort input populations randomly chosen from a broad class of common probability distributions in "space" (number of memory words, each able to hold a real number) and average time both linear in the number of real numbers given as input. Included among these distributions are a variety of types containing singularities, unbounded oscillations and points of actual nonzero probability (atoms). With the second model, the Random RAM, one may sort n arbitrarily chosen distinct real numbers in 0(n) operations using only 0(n) memory words on average. Except for random integer selection on the Random RAM , both models are confined to simple binary arithmetic. The power of both models appears to stem largely from the combination of left and right shifting operations.
Introducing a Novel Data over Voice Technique for Secure Voice Communication
Creators: name: Krasnowski, Piotr
name: Lebrun, Jerome
name: Martin, Bruno
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: The current increasing need for privacy-preserving voice communications is leading to new ideas for securing voice transmission. This paper refers to a relatively new concept of sending encrypted data or speech as pseudo-speech in the audio domain over existing voice communication infrastructures, like 3G cellular network and Voice over IP (VoIP). The distinctive characteristic of such a communication system is that it relies on the robust transmission of binary information in the form of audio signal. This work presents a novel Data over Voice (DoV) technique based on codebooks of short harmonic waveforms. The technique provides a sufficiently fast and reliable data rate over cellular networks and many VoIP applications. The new method relies on general principles of Linear Predictive Coding for voice compression (LPC voice coding) and is more versatile compared to solutions trained on exact channel models. The technique gives by design a high control over the desired rate of transmission and provides robustness to channel distortion. In addition, an efficient codebook design approach inspired by quaternary error correcting codes is proposed. The usability of the proposed DoV technique for secure voice communication over cellular networks and VoIP has been successfully validated by empirical experiments. The paper details the system parameters, putting a special emphasis on system's security and technical challenges.
description: 22 pages, 43 figures; submitted to Wireless Personal Communications, Springer on 17 Jul. 2020; initially accepted on 13 Apr. 2021; revised on 27 Apr. 2021; finally accepted on 6 Jan. 2022; published on 25 Jan. 2022; this work is supported by grant DGA Cifre-Defense program No 01D17022178 DGA/DS/MRIS and AID program No SED0456JE75
The Deep Chandra Survey of the Groth Strip - II. optical identification of the X-ray sources
Creators: name: Georgakakis, A.
name: Nandra, K .
name: Laird, E. S.
name: Gwyn, S.
name: Steidel, C. C.
name: Sarajedini, V. L.
name: Barmby, P.
name: Faber, S. M.
name: Coil, A. L.
name: Cooper, M. C.
name: Davis, M.
name: Newman, J. A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We discuss the optical and X-ray spectral properties of the sources detected in a single 200ks Chandra pointing in the Groth-Westphal Strip region. Optical identifications and spectroscopic redshifts are primarily from the DEEP2 survey. This is complemented with deeper (r~26mag) multi-waveband data (ugriz) from the Canada France Hawaii Legacy Survey to estimate photometric redshifts and to optically identify sources fainter than the DEEP2 magnitude limit (R(AB)~24.5mag). We focus our study on the 2-10keV selected sample comprising 97 sources to the limit ~8e-16erg/s/cm2, this being the most complete in terms of optical identification rate (86%) and redshift determination fraction (63%; both spectroscopic and photometric). We first construct the redshift distribution of the sample which shows a peak at z~1. This is in broad agreement with models where less luminous AGNs evolve out to z~1 with powerful QSOs peaking at higher redshift, z~2. Evolution similar to that of broad-line QSOs applied to the entire AGN population (both type-I and II) does not fit the data. We also explore the observed N_H distribution of the sample and estimate a fraction of obscured AGN (N_H>1e22) of ~48%. This is found to be consistent with both a luminosity dependent intrinsic N_H distribution, where less luminous systems comprise a higher fraction of type-II AGNs, and models with a fixed ratio 2:1 between type-I and II AGNs. We further compare our results with those obtained in deeper and shallower surveys. We argue that a luminosity dependent parametrisation of the intrinsic N_H distribution is required to account for the fraction of obscured AGN observed in different samples over a wide range of fluxes.
description: MNRAS in press
Ungruhe, Christian: Lasten tragen, Moderne befördern: Wanderarbeit, Jugend, Erwachsenwerden und ihre geschlechtsspezifischen Differenzierungen in Ghana
Creators: name: Klocke-Daffa, Sabine
Publisher: name: Zeitschrift für Ethnologie/Journal of Social and Cultural Anthropology
Year: 2024

description: Zeitschrift für Ethnologie/Journal of Social and Cultural Anthropology, Bd. 149 Nr. 1 (2024): Zeitschrift für Ethnologie/Journal of Social and Cultural Anthropology
Doping Dependence of Polaron Hopping Energies in La(1-x)Ca(x)MnO(3) (0<= x<= 0.15)
Creators: name: Neupane, K. P.
name: Cohn, J. L.
name: Terashita, H.
name: Neumeier, J. J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Measurements of the low-frequency (f<= 100 kHz) permittivity at T<= 160 K and dc resistivity (T<= 430 K) are reported for La(1-x)Ca(x)MnO(3) (0<= x<= 0.15). Static dielectric constants are determined from the low-T limiting behavior of the permittivity. The estimated polarizability for bound holes ~ 10^{-22} cm^{-3} implies a radius comparable to the interatomic spacing, consistent with the small polaron picture established from prior transport studies near room temperature and above on nearby compositions. Relaxation peaks in the dielectric loss associated with charge-carrier hopping yield activation energies in good agreement with low-T hopping energies determined from variable-range hopping fits of the dc resistivity. The doping dependence of these energies suggests that the orthorhombic, canted antiferromagnetic ground state tends toward an insulator-metal transition that is not realized due to the formation of the ferromagnetic insulating state near Mn(4+) concentration ~ 0.13.
description: PRB in press, 5 pages, 6 figures
Einstein-Gauss-Bonnet gravity coupled to bumblebee field in four dimensional spacetime
Creators: name: Ding, Chikun
name: Chen, Xiongwen
name: Fu, Xiangyun
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study Einstein-Gauss-Bonnet gravity coupled to a bumblebee field which leads to a spontaneous Lorentz symmetry breaking in the gravitational sector. We obtain an exact black hole solution and a cosmological solution in four dimensional spacetime by a regularization scheme. We also obtain a Schwarzschild-like bumblebee black hole solution in $D$-dimensional spacetime. We find that the bumblebee field doesn't affect the locations of the black hole horizon, but only affects the gravitational potential. That is, its gravitational potential has a minimum value(negative) in the black hole interior and has a positive value $1+\ell$ at short distance $r\rightarrow0$. If the constant $\ell$ is large enough, then this kind of black hole is practically free from the singularity problem. The thermodynamics and phase transition are also studied. In a cosmological context, it is interesting that the Gauss-Bonnet term has no effect on the conservation of energy equation. A late-time expansion of de Sitter universe can be replicated in an empty space. The Gauss-Bonnet term and the bumblebee field can both actually act as a form of dark energy.
description: 18 pages, four figures, accepted by Nucl. Phys. B
Theoretical light curves for deflagration models of Type Ia supernova
Creators: name: Blinnikov, S. I.
name: Roepke, F. K.
name: Sorokina, E. I.
name: Gieseler, M.
name: Reinecke, M.
name: Travaglio, C.
name: Hillebrandt, W.
name: Stritzinger, M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present synthetic bolometric and broad-band UBVRI light curves of SNe Ia, for four selected 3-D deflagration models of thermonuclear supernovae. The light curves are computed with the 1-D hydro code STELLA, which models (multi-group time-dependent) non-equilibrium radiative transfer inside SN ejecta. Angle-averaged results from 3-D hydrodynamical explosion simulations with the composition determined in a nucleosynthetic postprocessing step served as the input to the radiative transfer model. The predicted model UBV light curves do agree reasonably well with the observed ones for SNe Ia in the range of low to normal luminosities, although the underlying hydrodynamical explosion models produced only a modest amount of radioactive Ni56 and relatively low kinetic energy in the explosion. The evolution of predicted B and V fluxes in the model with a Ni56 mass of 0.42 M_sun follows the observed decline rate after the maximum very well, although the behavior of fluxes in other filters somewhat deviates from observations, and the bolometric decline rate is a bit slow. Using our models, we check the validity of Arnett's rule and the accuracy of the procedure for extracting the Ni56 mass from the observed light curves. We find that the comparison between theoretical light curves and observations provides a useful tool to validate SN Ia models. The steps necessary to improve the agreement between theory and observations are set out.
description: 14 pages, 17 figures, 4 tables; accepted to publication in Astronomy & Astrophysics
Tuning for Three-flavors of Anisotropic Clover Fermions with Stout-link Smearing
Creators: name: Edwards, Robert G.
name: Joó, Bálint
name: Lin, Huey-Wen
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: In this work we perform the parameter tuning of three flavors of dynamical clover quarks on anisotropic lattices. The fermion action uses three-dimensional spatial stout-link smearing. The gauge anisotropy is determined in a small box with Schrödinger background using Wilson-loop ratios. The fermion anisotropy is obtained from studying the meson dispersion relation with antiperiodic boundary conditions in the time direction. The spatial and temporal clover coefficients are fixed to the tree-level tadpole-improved values, and we demonstrate that they satisfy the nonperturbative conditions as determined by the Schrödinger functional method. For the desired lattice spacing $a_s\approx 0.12$ fm and renormalized anisotropy $ξ=3.5$, we find the gauge and fermionic anisotropies can be fixed to quark mass independent values up through the strange quark mass. This work lays the foundation needed for further studies of the excited-state hadron spectrum.
description: 23 pages, 18 figures
Non-RAM-Based Architectural Designs of Wavelet-Based Digital Systems Based on Novel Nonlinear I/O Data Space Transformations
Creators: name: Lu, Mi
name: Dongming Peng
Publisher: name: figshare
Year: 2021
Subjects: subject: 80106 Image Processing
subject: FOS: Computer and information sciences

description: The designs of application specific integrated circuitsand/or multiprocessor systems are usually required in order toimprove the performance of multidimensional applications such asdigital-image processing and computer vision. Wavelet-based algorithmshave been found promising among these applications dueto the features of hierarchical signal analysis and multiresolutionanalysis. Because of the large size of multidimensional input data,off-chip random access memory (RAM) based systems have everbeen necessary for calculating algorithms in these applications,where either memory address pointers or data preprocessing andrearrangements in off-chip memories are employed. This paperestablishes and follows novel concepts in data dependence analysisfor generalized and arbitrarily multidimensional wavelet-basedalgorithms, i.e., the wavelet-adjacent field and the super wavelet-dependencevector. Based on them, a series of novel nonlinear I/Odata space transformations for variable localization and dependencegraph regularization for wavelet algorithms is proposed.It leads to general designs of non-RAM-based architectures forwavelet-based algorithms where off-chip communications forintermediate calculation results are eliminated without preprocessingor rearranging input data.
Managing network congestion with a Kohonen-based RED queue
Creators: name: Lochin, Emmanuel
name: Talavera, Bruno
Publisher: name: arXiv
Year: 2006
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: Neural and Evolutionary Computing (cs.NE)
subject: FOS: Computer and information sciences

description: The behaviour of the TCP AIMD algorithm is known to cause queue length oscillations when congestion occurs at a router output link. Indeed, due to these queueing variations, end-to-end applications experience large delay jitter. Many studies have proposed efficient Active Queue Management (AQM) mechanisms in order to reduce queue oscillations and stabilize the queue length. These AQM are mostly improvements of the Random Early Detection (RED) model. Unfortunately, these enhancements do not react in a similar manner for various network conditions and are strongly sensitive to their initial setting parameters. Although this paper proposes a solution to overcome the difficulties of setting these parameters by using a Kohonen neural network model, another goal of this study is to investigate whether cognitive intelligence could be placed in the core network to solve such stability problem. In our context, we use results from the neural network area to demonstrate that our proposal, named Kohonen-RED (KRED), enables a stable queue length without complex parameters setting and passive measurements.
description: 8 pages, 9 figures
Fay, Franziska: Disputing Discipline: Child Protection, Punishment, and Piety in Zanzibar Schools
Creators: name: Sounaye, Abdoulaye
Publisher: name: Zeitschrift für Ethnologie/Journal of Social and Cultural Anthropology
Year: 2024

description: Zeitschrift für Ethnologie/Journal of Social and Cultural Anthropology, Bd. 149 Nr. 1 (2024): Zeitschrift für Ethnologie/Journal of Social and Cultural Anthropology
Frembgen, Jürgen Wasim: Sufi Hotel. Aufzeichnungen aus den Untiefen einer Megacity
Creators: name: Zehmisch, Philipp
Publisher: name: Zeitschrift für Ethnologie/Journal of Social and Cultural Anthropology
Year: 2024

description: Zeitschrift für Ethnologie/Journal of Social and Cultural Anthropology, Bd. 149 Nr. 1 (2024): Zeitschrift für Ethnologie/Journal of Social and Cultural Anthropology