cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Allocative Efficiency and Profitability of Smallholder Wheat Producers in South Eastern Ethiopia: Stochastic Frontier Approach
Creators: name: Tolesa Alemu Ayano, Adem Kedir Geleto
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2018

description: This study was carried out in major wheat producing agro-ecologies of Ethiopia to measure the level of allocative efficiency and profitability of smallholders in wheat production. Cross-sectional data were collected from 381 randomly selected farm households. Descriptive and inferential statistics and Stochastic Frontier Cobb-Douglas cost function were employed to achieve the objectives of the study. The results reveal that elasticities of total cost of production due to changes in prices of improved seed, pesticides, and wheat output are statistically significant in the lowland. In midland, changes in prices of chemical fertilizers, improved seed, pesticides and output have significant effects on the proportionate change in total cost of production. Increased total cost of production is associated with increased profitability. The average allocative efficiency estimates for the lowland, midland and highland agro-ecologies were 89, 88 and 87 percents, respectively. Relatively, smallholders are more profitable in midland agro-ecology with average profit of 8,039.89 ETB/ha. The profitability of smallholders is the lowest in the lowland (1,083.91 ETB/ha). Increases in the supply (availability) and utilization of improved seeds, chemical fertilizers and pesticides with fair prices increase the profitability of smallholders in wheat production.
Δεξιότητες εξαπάτησης σε ηλικιωμένους μάρτυρες
Creators: name: Κατσού, Φλώρα Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Εξαπάτηση
Ηλικιωμένοι
Μάρτυρες
Deception
Elders
Eyewitnesses

description: Στην παρούσα μελέτη εξετάστηκαν οι δεξιότητες εξαπάτησης ηλικιωμένων «μαρτύρων». Ανάλογα με την επίδοση στη Γνωστική Εκτίμηση Μόντρεαλ (MoCa) διαχωρίστηκαν σε τρεις ομάδες γνωστικής λειτουργικότητας, ενώ αποκλείστηκαν όσοι είχαν επίδοση κάτω από το 20 και πάνω από 5 στο Geriatric Depression Scale (GDS). Χορηγήθηκαν πέντε δοκιμασίες: δύο γνωστικά έργα, D-KEFS Δοκιμασία του Πύργου και Δοκιμασία της Λεκτικής Ευχέρειας, δύο έργα κοινωνικής νόησης, The Awareness of Social Inference Test (TASIT II) και Ιστορίες Θεωρίας του Νου 3ου Επιπέδου, ένα πείραμα μνήμης μαρτύρων και εξαπάτησης, που κατασκευάστηκε για τη συγκεκριμένη έρευνα. Βρέθηκε στατιστικώς σημαντική διαφορά ανάμεσα στις τρεις ομάδες στην επίδοση μνήμης μαρτύρων και εξαπάτησης. Επίσης, βρέθηκε ότι η γενική γνωστική ικανότητα επιδρά στην ικανότητα εξαπάτησης. Τα ευρήματά μας έδειξαν ότι οι ηλικιωμένοι με χαμηλή γνωστική λειτουργικότητα δε μπορούν να πουν ψέματα επιτυχημένα, σε αντίθεση με τους ηλικιωμένους με μέτρια γνωστική λειτουργικότητα που διατηρούν την ικανότητα εξαπάτησης παρόλο που η μνήμη τους εξασθενεί. Αυτό ίσως οφείλεται στο γνωστικό φόρτο που είναι μεγαλύτερου βαθμού σε ηλικιωμένους με χαμηλή γνωστική λειτουργικότητα.
description: This study examined the deception skills of elderly “eyewitnesses”. They were divided into three groups of different cognitive functionality based on their performance in Montreal Cognitive Assessment (MoCa), excluding these participants with scores below 20 and over 5 in the Geriatric Depression Scale (GDS). Five tests were assessed. Two cognitive tasks, the D-KEFS Tower Test and Verbal Fluency, two social cognition tasks, the Awareness of Social Inference Test (TASIT II) and Theory of Mind 3rd Level tasks, an eyewitness and deception task, which was constructed for this study. There was a statistically significant difference between the groups in eyewitness memory and deception. It has also been found that general cognitive ability affects the ability to deceive. The findings have shown that elders with low cognitive function cannot lie successfully, unlike elders with moderate cognitive functionality that retain the ability to deceive even though their memory is deteriorating. This may be due to higher cognitive load that deception applies to elders with low cognitive function.
The Nature of the Secondary Star in the Black Hole X-Ray Transient V616 Mon (=A0620-00)
Creators: name: Harrison, Thomas E.
name: Howell, Steve B.
name: Szkody, Paula
name: Cordova, France A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have used NIRSPEC on Keck II to obtain $K$-band spectroscopy of the low mass X-ray binary V616 Mon (= A0620$-$00). V616 Mon is the proto-typical soft x-ray transient containing a black hole primary. As such it is important to constrain the masses of the binary components. The modeling of the infrared observations of ellipsoidal variations in this system lead to a derived mass of 11.0 M$_{\sun}$ for the black hole. The validity of this derivation has been called into question due to the possiblity that the secondary star's spectral energy distribution is contaminated by accretion disk emission (acting to dilute the variations). Our new $K$-band spectrum of V616 Mon reveals a late-type K dwarf secondary star, but one that has very weak $^{\rm 12}$CO absorption features. Comparison of V616 Mon with SS Cyg leads us to estimate that the accretion disk supplies only a small amount of $K$-band flux, and the ellipsoidal variations are not seriously contaminated. If true, the derived orbital inclination of V616 Mon is not greatly altered, and the mass of the black hole remains large. A preliminary stellar atmosphere model for the $K$-band spectrum of V616 Mon reveals that the carbon abundance is approximately 50% of the solar value. We conclude that the secondary star in V616 Mon has either suffered serious contamination from the accretion of supernova ejecta that created the black hole primary, or it is the stripped remains of a formerly more massive secondary star, one in which the CNO cycle had been active.
description: 20 pages, 5 figures
Loschmidt echo and Berry phase around degeneracies in nonlinear systems
Creators: name: Yi, X. X.
name: Huang, X. L.
name: Wang, W.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study the Loschmidt echo and Berry phase in a nonlinear system transported around a double and triple degeneracy. The nonlinearity of the system makes the Berry phase different from that in linear systems. We propose a witness of nonlinearity for the nonlinear system and show its dependence on the parameters of the system, taking the standard Landau-Zener model as an example. We calculate the Loschmidt echo(LE) or quantum fidelity in the quantum dynamics under perturbations around the degeneracy, and establish a connection between the LE and the witness of nonlinearity. These phases and Loschmidt echo can be observed with current experimental technology in a nonlinear resonator.
Stiffening of matter in quark-hadron continuity
Creators: name: Kojo, Toru
Publisher: name: arXiv
Year: 2021
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We discuss stiffening of matter in quark-hadron continuity. We introduce a model that relates quark wave functions in a baryon and the occupation probability of states for baryons and quarks in dense matter. In a dilute regime, the confined quarks contribute to the energy density through the masses of baryons, but do not directly contribute to the pressure; hence, the equations of state are very soft. This dilute regime continues until the low momentum states for quarks get saturated; this may happen even before baryons fully overlap, possibly at density slightly above the nuclear saturation density. After the saturation the pressure grows rapidly while changes in energy density are modest, producing a peak in the speed of sound. If we use baryonic descriptions for quark distributions near the Fermi surface, we reach a description similar to the quarkyonic matter model of McLerran and Reddy. With a simple adjustment of quark interactions to get the nucleon mass, our model becomes consistent with the constraints from 1.4-solar mass neutron stars, but the high density part is too soft to account for two-solar mass neutron stars. We delineate the relation between the saturation effects and short range interactions of quarks, suggesting interactions that leave low density equations of state unchanged but stiffen the high density part.
description: 14 pages, 14 figures; v2) 15 pages, 16 figures; v3) published in PRD
Conversa com Luíz Tamuxi e Manoel Kanuxi
Creators: name: Kanuxi, Manoel
name: Tamuxi, Luiz
name: Bardagil Mas, Bernat
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2023
Subjects: Manoki language

description: Conversa entre Luíz Tamuxi, Manoel Kanuxi e Bernat Bardagil Nãpuli, principalmente em língua mỹky, sobre vários temas como mel e abelhas.
Conversation between Luíz Tamuxi, Manoel Kanuxi and Bernat Bardagil Nãpuli, mostly in Mỹky language, about several topics including honey and bees.
Full KEGG
Creators: name: huckvale, erik
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 340701
subject: Computational chemistry

description: This Figshare contains the data and code for reproducing the scientific article involving training a machine learning model to predict the pathway involvement of compounds. The dataset contains all the compounds with pathway annotations available in the Kyoto Encyclopedia of Genes and Genomes (KEGG) as of September 2024.
Beautiful and charming chromodipole moments
Creators: name: Haisch, Ulrich
name: Koole, Gabriël
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: In the context of the Standard Model effective field theory we derive direct and indirect bounds on chromodipole operators involving the bottom and charm quark. We find that the experimental upper limit on the neutron electric dipole moment puts severe constraints on the imaginary parts of the Wilson coefficients of both chromodipole operators. The magnitudes of the Wilson coefficients are instead only weakly constrained by dijet searches and Z-boson production in association with bottom-quark jets. Flavour physics does not provide meaningful bounds.
description: 22 pages, 7 figures and 1 table, v2: minor modifications and additions to the text; matches version published in JHEP
The effect of steady rate exercise on the pattern of force production of the lower limbs in cycling
Creators: name: Black, Alexander H.
Publisher: name: University of British Columbia
Year: 2009

description: The role of fatigue in the cessation of activity has been studied extensively and reported i n the physiology literature. Biomechanical compensations that occur as a result of fatigue, however, have had little focus in the scientific literature. Data have been published (Black et al. 1992 and Amoroso et al., 1993) that suggest there are biomechanical compensations that occur just prior to the cessation of activity as a result of the fatigue process in cycling. These compensations include increases in the index of effectiveness, earlier maximum force production in the pedal cycle, and increased dorsiflexion at the ankle. These changes suggest that there are compensations by the muscles in response to the onset of whole body fatigue. The purpose of the present investigation was to quantify the biomechanical changes that result from the progressive onset of fatigue in cycling. The criterion measurements included timings of maximum joint angle excursions, timings of maximum force production and timings of maximum joint moments at the ankle, knee and hip. Male cyclists (n=12) completed a progressive, incremental maximal exercise test at 90 RPM on a bicycle ergometer to determine maximum power outputs. Two steady rate, constant power output rides followed: one at 80% maximum power output (max P.O.) to exhaustion, and one at 30% max P.O., for the same length of time as the 80% max P.O. ride. Force data were collected from the right pedal of an instrumented bicycle for 3 pedal cycles at the end of each minute of the steady rate exercise tests. Kinematic data were recorded ongoing throughout the steady rate exercise test. Kinematic and kinetic data for the initial and final minutes of both steady state rides were then time matched and joint moments for the ankle, knee and hip were calculated using the inverse dynamics approach. There were significant differences between the initial and final minutes of the study. These changes included earlier maximum hip extensor moment, greater ankle plantarflexor moment, increased knee flexor moment and increased hip extensor moment (p<0.05). These increased joint moments summed to produce a significantly larger propulsive moment in the final minute of the exercise (p<0.05). These changes were results of changes in the kinematic data and the kinetic data that were the result of fatigue. Based on the results of this study, it was concluded that the increase in the propulsive moment was necessary to overcome a decrease in the index of effectiveness (p<0.05), which was a product of whole body fatigue. The increase i n the propulsive moment was a result of increases in the maximum joint moments at each of the lower limb joints. In summary, as the results of fatigue affect an athlete, the athlete is forced to change the strategy of muscle recruitment which is used to overcome the given power output in order postpone the cessation of exercise.
Unitarity constraints on ALP interactions
Creators: name: Brivio, I.
name: Éboli, O. J. P.
name: Gonzalez-Garcia, M. C.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We derive partial-wave unitarity constraints on gauge-invariant interactions of an Axion-Like Particle (ALP) up to dimension-6 from all allowed $2\to2$ scattering processes in the limit of large center-of-mass energy. We find that the strongest bounds stem from scattering amplitudes with one external ALP and only apply to the coupling to a pair of $SU(2)_L$ gauge bosons. Couplings to $U(1)_Y$ and $SU(3)_C$ gauge bosons and to fermions are more loosely constrained.
description: 11 pages, 1 figure, 5 tables. Version published in PRD
NGC 3741: dark halo profile from the most extended rotation curve
Creators: name: Gentile, G.
name: Salucci, P.
name: Klein, U.
name: Granato, G. L.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present new HI observations of the nearby dwarf galaxy NGC 3741. This galaxy has an extremely extended HI disk, which allows us to trace the rotation curve out to unprecedented distances in terms of the optical disk: we reach 42 B-band exponential scale lengths or about 7 kpc. The HI disk is strongly warped, but the warp is very symmetric. The distribution and kinematics are accurately derived by building model data cubes, which closely reproduce the observations. In order to account for the observed features in the data cube, radial motions of the order of 5-13 km/s are needed. They are consistent with an inner bar of several hundreds of pc and accretion of material in the outer regions. The observed rotation curve was decomposed into its stellar, gaseous and dark components. The Burkert dark halo (with a central constant density core) provides very good fits. The dark halo density distribution predicted by the LambdaCDM theory fails to fit the data, unless NGC 3741 is a 2.5-sigma exception to the predicted relation between concentration parameter and virial mass and has at the same time a high value of the virial mass (though poorly constrained) of 10$^{11}$ solar masses. Noticeably, MOND seems to be consistent with the observed rotation curve. Scaling up the contribution of the gaseous disk also gives a good fit.
description: Accepted for publication in MNRAS; 16 pages, 19 figures. Version with full resolution figures available at http://www.phys.unm.edu/~ggentile/paper.ps
A privacy-preserving approach to streaming eye-tracking data
Creators: name: David-John, Brendan
name: Hosfelt, Diane
name: Butler, Kevin
name: Jain, Eakta
Publisher: name: arXiv
Year: 2021
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences

description: Eye-tracking technology is being increasingly integrated into mixed reality devices. Although critical applications are being enabled, there are significant possibilities for violating user privacy expectations. We show that there is an appreciable risk of unique user identification even under natural viewing conditions in virtual reality. This identification would allow an app to connect a user's personal ID with their work ID without needing their consent, for example. To mitigate such risks we propose a framework that incorporates gatekeeping via the design of the application programming interface and via software-implemented privacy mechanisms. Our results indicate that these mechanisms can reduce the rate of identification from as much as 85% to as low as 30%. The impact of introducing these mechanisms is less than 1.5$^\circ$ error in gaze position for gaze prediction. Gaze data streams can thus be made private while still allowing for gaze prediction, for example, during foveated rendering. Our approach is the first to support privacy-by-design in the flow of eye-tracking data within mixed reality use cases.
description: 12 pages, 4 figures, to appear in IEEE TVCG Special Issue on IEEE VR 2021
Brane Models with a Ricci-Coupled Scalar Field
Creators: name: Bogdanos, C.
name: Dimitriadis, A.
name: Tamvakis, K.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider the problem of a scalar field, non-minimally coupled to gravity through a $-ξϕ^{2}R$ term, in the presence of a Brane. Exact solutions, for a wide range of values of the coupling parameter $ξ$, for both $ϕ$-dependent and $ϕ$-independent Brane tension, are derived and their behaviour is studied. In the case of a Randall-Sundrum geometry, a class of the resulting scalar field solutions exhibits a folded-kink profile. We go beyond the Randall-Sundrum geometry studying general warp factor solutions in the presence of a kink scalar. Analytic and numerical results are provided for the case of a Brane or for smooth geometries, where the scalar field acts as a thick Brane. It is shown that finite geometries with warp factors that asymptotically decrease exponentially are realizable for a wide range of parameter values. We also study graviton localization in our setup and find that the localizing potential for gravitons with the characteristic volcano-like profile develops a local maximum located at the origin for high values of the coupling $ξ$.
description: 20 pages, 14 figures
Opportunities and Constraints of Ware Potato Value Chain Analysis: West Showa Zone, Central Ethiopia
Creators: name: *Biruk-Kemaw1 Diriba-Shiferaw2 Seid-Sani1 Tamiru Chalchisa3
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2017

description: Potato plays important roles in local food systems and for food security; however due to the prevalence of production and marketing constraints, the crop haven't supply majority of its advantages.Thus the study was conducted in order to assess the constraints, opportunities and to develop strategic interventions in ware potato production and value chain in Ambo and Dendi districts, Ethiopia. Both primary and secondary data collections were used. Primary data were collected from 227 sampled respondents randomly. Descriptive statistics and opportunities and constraint were used as a means of data analysis. The study revealed that there were high ware potato production potentials in the study areas and from the total potato produced by sample respondents, about 76.28% and 68.68% were sold from Ambo and Dendi districts, respectively. Even though there were potential conditions, in the study areas, the sector was constrained by different production and marketing problems like diseases, drought, insects problems, lack of sufficient irrigation water, limited access to supply of agricultural inputs, lack of adequate extension services, postharvest loss of produce, and others. Thus, to advance the crop productivity, post-harvest value and marketing systems, the ware potato value chain needs an organized and modern agricultural practices, pre and post-harvest management systems, creation of value in order to increase benefits and sufficient technical, financial support services, regulatory framework and availability of information systems. Generally, interventions are required to improve the efficiency and profitability of ware potato value chain in the study areas.
Nonextensive random-matrix theory based on Kaniadakis entropy
Creators: name: Abul-Magd, A. Y.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The joint eigenvalue distributions of random-matrix ensembles are derived by applying the principle maximum entropy to the Renyi, Abe and Kaniadakis entropies. While the Renyi entropy produces essentially the same matrix-element distributions as the previously obtained expression by using the Tsallis entropy, and the Abe entropy does not lead to a closed form expression, the Kaniadakis entropy leads to a new generalized form of the Wigner surmise that describes a transition of the spacing distribution from chaos to order. This expression is compared with the corresponding expression obtained by assuming Tsallis' entropy as well as the results of a previous numerical experiment.
description: 10 pages, 2 figures
Texto: Quando os povos sairam da pedra
Creators: name: Tamuxi, Luiz
name: Bardagil Mas, Bernat
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2023
Subjects: Manoki language

description: Luíz Tamuxi conta em mỹky a história de como as pessoas sairam da pedra, dando origem aos diferentes povos.
Luíz Tamuxi tells in Mỹky the story of how people emerged from inside the stone, giving rise to the different nations.
Gold Clusters Sliding on Graphite: a Possible Quartz Crystal Microbalance Experiment?
Creators: name: Pisov, Stoyan
name: Tosatti, Erio
name: Tartaglino, Ugo
name: Vanossi, Andrea
Publisher: name: arXiv
Year: 2007
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: A large measured 2D diffusion coefficient of gold nanoclusters on graphite has been known experimentally and theoretically for about a decade. When subjected to a lateral force, these clusters should slide with an amount of friction that could be measured. We examine the hypothetical possibility to measure by Quartz Crystal Microbalance (QCM) the phononic sliding friction of gold clusters in the size range around 250 atoms on a graphite substrate between 300 and 600 K. Assuming the validity of Einstein's relations of ordinary Brownian motion and making use of the experimentally available activated behavior of the diffusion coefficients, we can predict the sliding friction and slip times as a function of temperature. It is found that a prototypical deposited gold cluster could yield slip times in the standard measurable size of 10^(-9) sec for temperatures around 450-500 K, or 200 C. Since gold nanoclusters may also melt around these temperatures, QCM would offer the additional chance to observe this phenomenon through a frictional change.
description: 5 pages, 3 figures. Published. Minimal changes with respect to the previous version
Warped generalized geometry compactifications, effective theories and non-perturbative effects
Creators: name: Koerber, P.
name: Martucci, L.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Summarizing the results of arXiv:0707.1038, we discuss the four-dimensional effective approach to type II N=1 supersymmetric flux compactifications with general SU(3)x SU(3)-structure. In particular, we study the effect of a non-trivial warp factor, which we argue leads naturally to a supergravity formulation invariant under local complexified Weyl transformations. We show that the full ten-dimensional supersymmetry equations can be obtained as F-flatness and D-flatness conditions from the superpotential and Kaehler potential. We then consider non-perturbative corrections to these supersymmetry conditions, following from adding instanton or gaugino condensation effects to the superpotential. As examples, we show how smeared instantons allow to understand the ten-dimensional geometry of KKLT-like AdS vacua and we give an explanation for the superpotential for "mobile" D3-branes in terms of a non-perturbatively induced generalized complex structure.
description: 9 pages, contribution to the proceedings of the 3rd workshop of the RTN project 'Constituents, Fundamental Forces and Symmetries of the Universe', Valencia
Smart City και Κτηματολόγιο
Creators: name: Βαρβατάκη, Νίκη Αθανασίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Κτηματολόγιο
Έξυπνη πόλη
Γεωγραφικά Συστήματα Πληροφοριών
Cadastre
Smart City
G.I.S.

description: Η παρούσα μεταπτυχιακή διατριβή έχει ως αντικείμενο τη διευρεύνηση των χαρακτηριστικών των έξυπνων πόλεων, καθώς και του τρόπου με τον οποίο το κτηματολόγιο μπορεί να συμβάλλει στην αξιοπιστία των δεδομένων που αυτές παρέχουν στους πολίτες. Ο όρος «έξυπνη πόλη» χρησιμοποιείται για να περιγράψει μία περιοχή (πόλη, συνοικία, κοινότητα, περιφέρεια) με βασικό χαρακτηριστικό της τη θέληση για επίλυση πρωτοεμφανιζόμενων προβλημάτων μέσω δημιουργικού πληθυσμού, καινοτόμων δραστηριοτήτων, αλλά και ανεπτυγμένης υποδομής ηλεκτρονικών υπηρεσιών και on line εργαλείων. Η έξυπνη πόλη προκύπτει μέσα από τη σύνθεση της πόλης, του συστήματος καινοτομίας και διαχείρισης γνώσεων, αλλά και του ψηφιακού χώρου. Η δε χρήση κατάλληλου και ελεγμένου ως προς την ποιότητά του υποβάθρου που να αποδεικνύει ανά πάσα στιγμή τη νομική, αλλά και την τεχνική κατάσταση όλων των ακινήτων που συμμετέχουν στην έξυπνη πόλη επιτυγχάνεται μέσω του κτηματολογίου. Η διερεύνηση της βιβλιογραφίας, των τεχνολογιών, αλλά και των εφαρμογών έξυπνων πόλεων βρίσκει εφαρμογή στο Δήμο Θεσσαλονίκης, όπου δημιουργείται και εξελίσσεται ένας ψηφιακός χώρος για την υποστήριξη των δημοτών, αλλά και των επισκεπτών της πόλης. Η μεταπτυχιακή αυτή διατριβή καταλήγει με την παρουσίαση των συμπερασμάτων που προέκυψαν από την έρευνα στη διεθνή βιβλιογραφία, αλλά και την παρουσίαση προτάσεων για την εύρυθμη λειτουργία μίας έξυπνης πόλης μέσω ενός ενιαίου πληροφοριακού συστήματος που να αποδεικνύει τη νομική και τεχνική κατάσταση όλων των ακινήτων, όπως το κτηματολόγιο
description: Abstract This thesis aims at exploring the smart cities’ characteristics, as well as how the cadastre can contribute to the reliability of the data provided to citizens.The term “smart city" is used to describe an area with its key characteristic the will to solve emerging problems through creative population, innovative activities and developed e-services infrastructure and on-line tools.The smart city emerges through the composition of the city, the innovation and knowledge management system, as well as the digital space. The use of appropriate and quality-tested backgrounds proving at any time the legal and technical status of all properties participating in the smart city can be achieved through cadastre. The exploration of bibliography, technologies and smart city applications is being implemented in the Municipality of Thessaloniki, where a digital space is created and evolved to support the city's residents and visitors.This thesis concludes with the presentation of the basic thoughts from research in the international literature and the presentation of proposals for the smooth operation of a smart city through a single information system that demonstrates the legal and technical status of all real estates, cadastre
Quantum theory of plasmon polaritons in chains of metallic nanoparticles: From near- to far-field coupling regime
Creators: name: Allard, Thomas F.
name: Weick, Guillaume
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We develop a quantum theory of plasmon polaritons in chains of metallic nanoparticles, describing both near- and far-field interparticle distances, by including plasmon-photon Umklapp processes. Taking into account the retardation effects of the long-range dipole-dipole interaction between the nanoparticles, which are induced by the coupling of the plasmonic degrees of freedom to the photonic continuum, we reveal the polaritonic nature of the normal modes of the system. We compute the dispersion relation and radiative linewidth, as well as the group velocities of the eigenmodes, and compare our numerical results to classical electrodynamic calculations within the point-dipole approximation. Interestingly, the group velocities of the polaritonic excitations present an almost periodic sign change and are found to be highly tunable by modifying the spacing between the nanoparticles. We show that, away from the intersection of the plasmonic eigenfrequencies with the free photon dispersion, an analytical perturbative treatment of the light-matter interaction is in excellent agreement with our fully retarded numerical calculations. We further study quantitatively the hybridization of light and matter excitations, through an analysis of Hopfield's coefficients. Finally, we consider the limit of infinitely spaced nanoparticles and discuss some recent results on single nanoparticles that can be found in the literature.
description: 20 pages, 9 figures
Canonical Formulation of A Bosonic Matter Field in 1+1 Dimensional Curved Space
Creators: name: Ghalati, R. N.
name: McKeon, D. G. C.
name: Sherry, T. N.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study a Bosonic scalar in 1+1 dimensional curved space that is coupled to a dynamical metric field. This metric, along with the affine connection, also appears in the Einstein-Hilbert action when written in first order form. After illustrating the Dirac constraint analysis in Yang-Mills theory, we apply this formulation to the Einstein-Hilbert action and the action of the Bosonic scalar field, first separately and then together. Only in the latter case does a dynamical degree of freedom emerge.
description: 21 pages
Ab initio electron-phonon interactions in correlated electron systems
Creators: name: Zhou, Jin-Jian
name: Park, Jinsoo
name: Timrov, Iurii
name: Floris, Andrea
name: Cococcioni, Matteo
name: Marzari, Nicola
name: Bernardi, Marco
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Electron-phonon ($e$-ph) interactions are pervasive in condensed matter, governing phenomena such as transport, superconductivity, charge-density waves, polarons and metal-insulator transitions. First-principles approaches enable accurate calculations of $e$-ph interactions in a wide range of solids. However, they remain an open challenge in correlated electron systems (CES), where density functional theory often fails to describe the ground state. Therefore reliable $e$-ph calculations remain out of reach for many transition metal oxides, high-temperature superconductors, Mott insulators, planetary materials and multiferroics. Here we show first-principles calculations of $e$-ph interactions in CES, using the framework of Hubbard-corrected density functional theory (DFT+$U$ ) and its linear response extension (DFPT+$U$), which can describe the electronic structure and lattice dynamics of many CES. We showcase the accuracy of this approach for a prototypical Mott system, CoO, carrying out a detailed investigation of its $e$-ph interactions and electron spectral functions. While standard DFPT gives unphysically divergent and short-ranged $e$-ph interactions, DFPT+$U$ is shown to remove the divergences and properly account for the long-range Fröhlich interaction, allowing us to model polaron effects in a Mott insulator. Our work establishes a broadly applicable and affordable approach for quantitative studies of e-ph interactions in CES, a novel theoretical tool to interpret experiments in this broad class of materials.
description: 6 pages, 4 figures
Direct measurements of the fractional quantum Hall effect gaps
Creators: name: Khrapai, V. S.
name: Shashkin, A. A.
name: Trokina, M. G.
name: Dolgopolov, V. T.
name: Pellegrini, V.
name: Beltram, F.
name: Biasiol, G.
name: Sorba, L.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We measure the chemical potential jump across the fractional gap in the low-temperature limit in the two-dimensional electron system of GaAs/AlGaAs single heterojunctions. In the fully spin-polarized regime, the gap for filling factor nu=1/3 increases LINEARLY with magnetic field and is coincident with that for nu=2/3, reflecting the electron-hole symmetry in the spin-split Landau level. In low magnetic fields, at the ground-state spin transition for nu=2/3, a correlated behavior of the nu=1/3 and nu=2/3 gaps is observed.
Head-to-Toe Measurement of El Gordo: Improved Analysis of the Galaxy Cluster ACT-CL J0102-4915 with New Wide-field Hubble Space Telescope Imaging Data
Creators: name: Kim, Jinhyub
name: Jee, M. James
name: Hughes, John P.
name: Yoon, Mijin
name: HyeongHan, Kim
name: Menanteau, Felipe
name: Sifon, Cristobal
name: Hovey, Luke
name: Arunachalam, Prasiddha
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present an improved weak-lensing (WL) study of the high$-z$ $(z=0.87)$ merging galaxy cluster ACT-CL J0102-4915 (El Gordo) based on new wide-field Hubble Space Telescope (HST) imaging data. The new imaging data cover the 3.5$\times$3.5 Mpc region centered on the cluster and enable us to detect WL signals beyond the virial radius, which was not possible in previous studies. We confirm the binary mass structure consisting of the northwestern (NW) and southeastern (SE) subclusters and the 2$σ$ dissociation between the SE mass peak and the X-ray cool core. We obtain the mass estimates of the subclusters by simultaneously fitting two Navarro-Frenk-White (NFW) halos without employing mass-concentration relations. The masses are $M_{200c}^{NW} = 9.9^{+2.1}_{-2.2} \times 10^{14} M_{\sun}$ and $M_{200c}^{SE} = 6.5^{+1.9}_{-1.4} \times 10^{14} M_{\sun}$ for the NW and SE subclusters, respectively. The mass ratio is consistent with our previous WL study but significantly different from the previous strong lensing results. This discrepancy is attributed to the use of extrapolation in strong lensing studies because the SE component possesses a higher concentration. By superposing the two best-fit NFW halos, we determine the total mass of El Gordo to be $M_{200c} = 2.13^{+0.25}_{-0.23} \times 10^{15} M_{\sun}$, which is 23% lower than our previous WL result [$M_{200c} =(2.76\pm0.51) \times 10^{15} M_{\sun}$]. Our updated mass is a more direct measurement since we are not extrapolating to $R_{200c}$ as in all previous studies. The new mass is compatible with the current $Λ$CDM cosmology.
description: 27 pages, 18 figures, 3 tables; matches the version accepted for publication in ApJ
Probing photoinduced proton coupled electron transfer process by means of two-dimensional resonant electronic-vibrational spectroscopy
Creators: name: Zhang, Jiaji
name: Borrelli, Raffaele
name: Tanimura, Yoshitaka
Publisher: name: arXiv
Year: 2021
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We develop a detailed theoretical model of photo-induced proton-coupled electron transfer (PPCET) processes, which are at the basis of solar energy harvesting in biological systems and photovoltaic materials. Our model enables to analyze the dynamics and the efficiency of a PPCET reaction under the influence of a thermal environment by disentangling the contribution of the fundamental electron transfer (ET) and proton transfer (PT) steps. In order to study quantum dynamics of the PPCET process under an interaction with non-Markovian environment we employ the hierarchical equations of motion (HEOM). We calculate transient absorption spectroscopy (TAS) and a newly defined two-dimensional resonant electronic-vibrational spectroscopy (2DREVS) signals in order to study the nonequilibrium reaction dynamics. Our results show that different transition pathways can be separated by TAS and 2DREVS.
description: J. Chem. Phys. Accepted
General Computations Without Fixing the Gauge
Creators: name: Rosten, Oliver J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Within the framework of a manifestly gauge invariant exact renormalization group for SU(N) Yang-Mills, we derive a simple expression for the expectation value of an arbitrary gauge invariant operator. We illustrate the use of this formula by computing the O(g^2) correction to the rectangular, Euclidean Wilson loop with sides T >> L. The standard result is trivially obtained, directly in the continuum, for the first time without fixing the gauge. We comment on possible future applications of the formalism.
description: 11 pages, 5 figures. v2: published in prd, review of methodology shortened, refs added, reformatted
A new perturbation technique for eigenenergies of the screened coulomb potential
Creators: name: Dobrovolska, I. V.
name: Tutik, R. S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The explicit semiclassical treatment of the logarithmic perturbation theory for the bound-state problem of the radial Shrodinger equation with the screened Coulomb potential is developed. Based upon h-expansions and new quantization conditions a novel procedure for deriving perturbation expansions is offered. Avoiding disadvantages of the standard approach, new handy recursion formulae with the same simple form both for ground and excited states have been obtained.
Η καθ’ ύλη αρμοδιότητα των ποινικών δικαστηρίων
Creators: name: Μπάτσιου, Παρασκευή Ιωάννη
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Δικαιοδοσία
Καθ’ ύλη αρμοδιότητα
Ένδικα μέσα
Jurisdiction
Material competence
Appeals

description: Στόχος της παρούσας διπλωματικής εργασίας είναι η εκτενής μελέτη του ζητήματος της καθ’ ύλη αρμοδιότητας των ποινικών δικαστηρίων με αναφορές στην ελληνική θεωρία και νομολογία. Αφού αναλύθηκε η έννοιας της «Δικαιοδοσίας» στο ποινικό δικονομικό δίκαιο καθώς και η καθ’ ύλη αρμοδιότητα των κοινών και των ειδικών ποινικών δικαστηρίων, εξετάζουμε τον τρόπο με τον οποίον ενεργούν τα δικαστήρια όταν εισάγεται σ’ αυτά μια υπόθεση για την οποία είναι καθ’ ύλη αναρμόδια. Παρουσιάζονται τα ένδικα μέσα κατά αποφάσεων που εφάρμοσαν εσφαλμένα τους κανόνες σχετικά με την καθ’ ύλη αρμοδιότητα. Στο τελευταίο κεφάλαιο παρουσιάζονται ειδικά ζητήματα που άπτονται του ζητήματος της καθ’ ύλη αρμοδιότητας.
description: The purpose of the present thesis is the thorough study of the material competence of criminal courts with references to the Greek law theory and case – law. After analyzing the term of ‘Jurisdiction’ in the criminal procedure law and the material competence of common and special criminal courts, we examine the way that courts react when they deal with a case about which they are materially incompetent. We present the appeals against decisions that did not apply right the procedural law about the material competence. The last chapter of the thesis deals with some specific aspects of the material competence.
Texto: A turma do Canuto Jalukari
Creators: name: Tamuxi, Luiz
name: Bardagil Mas, Bernat
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2023
Subjects: Manoki language

description: Luíz Tamuxi fala sobre a turma do Canuto Jalukari, um grupo de Manoki chamados Akohmija (o povo tucano) que existiu antes da chegada das doenças e o deslocamento para Utiariti, que hoje em dia são lembrados como muito guerreiros. Primeiro em português e depois em mỹky.
Luíz Tamuxi tells about the Manoki of chief Canuto Jalukari, a group known back then as the Akohmija (toucan people) that existed before the epidemics and the transfer to the Utiariti mission, who have a reputation for being fierce and warlike. First in Portuguese and then in Mỹky.
Structure detection in the D1 CFHTLS deep field using accurate photometric redshifts: a benchmark
Creators: name: Mazure, A.
name: Adami, C.
name: Pierre, M.
name: Fèvre, O. Le
name: Arnouts, S.
name: Duc, P. A.
name: Ilbert, O.
name: LeBrun, V.
name: Meneux, B.
name: Pacaud, F.
name: Surdej, J.
name: Valtchanov, I.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We investigate structures in the D1 CFHTLS deep field in order to test the method that will be applied to generate homogeneous samples of clusters and groups of galaxies in order to constrain cosmology and detailed physics of groups and clusters. Adaptive kernel technique is applied on galaxy catalogues. This technique needs none of the usual a-priori assumptions (luminosity function, density profile, colour of galaxies) made with other methods. Its main drawback (decrease of efficiency with increasing background) is overcame by the use of narrow slices in photometric redshift space. There are two main concerns in structure detection. One is false detection and the second, the evaluation of the selection function in particular if one wants "complete" samples. We deal here with the first concern using random distributions. For the second, comparison with detailed simulations is foreseen but we use here a pragmatic approach with comparing our results to GalICS simulations to check that our detection number is not totally at odds compared to cosmological simulations. We use XMM-LSS survey and secured VVDS redshifts up to z~1 to check individual detections. We show that our detection method is basically capable to recover (in the regions in common) 100% of the C1 XMM-LSS X-ray detections in the correct redshift range plus several other candidates. Moreover when spectroscopic data are available, we confirm our detections, even those without X-ray data.
description: 14 pages, 22 additionnal jpeg figures, accepted in A&A
Equivalence of critical scaling laws for many-body entanglement in the Lipkin-Meshkov-Glick model
Creators: name: Orus, R.
name: Dusuel, S.
name: Vidal, J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We establish a relation between several entanglement properties in the Lipkin-Meshkov-Glick model, which is a system of mutually interacting spins embedded in a magnetic field. We provide analytical proofs that the single-copy entanglement and the global geometric entanglement of the ground state close to and at criticality behave as the entanglement entropy. These results are in deep contrast to what is found in one- dimensional spin systems where these three entanglement measures behave differently.
description: 4 pages, 2 figures, published version
Ο επιθεωρητισμός και η αξιολόγηση των εκπαιδευτικών πρωτοβάθμιας εκπαίδευσης κατά την περίοδο 1967-1982
Creators: name: Μότα, Ευστρατία Αποστόλου
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Αξιολόγηση Εκπαιδευτικών
Επιθεωρητισμός
Teacher's evaluation

description: Η παρούσα εργασία έχει σκοπό τη μελέτη και ανάλυση των περιεχομένων των Εκθέσεων Ουσιαστικών Προσόντων των δασκάλων από τους επιθεωρητές της Πρωτοβάθμιας Εκπαίδευσης την περίοδο 1967-1982, καθώς και την καταγραφή των αποτελεσμάτων και συμπερασμάτων που εξήχθησαν. Με τη χρήση της μεθόδου της ποιοτικής ανάλυσης περιεχομένου μελετήθηκε ο τρόπος αξιολόγησης των εκπαιδευτικών της πρωτοβάθμιας εκπαίδευσης, στη βάση σχετικών κριτηρίων. Χρησιμοποιήθηκαν πρωτογενείς πηγές άντλησης δεδομένων που συζητήθηκαν βιβλιογραφικά, στο ιστορικό και κοινωνικό πλαίσιο της παραπάνω περιόδου.
description: The present study aims to study and analyze the contents of the Qualifications Reports of teachers by the primary school inspectors during the period 1967-1982, as well as to record the results and conclusions that were exported. The method of qualitative content analysis studied the way of assessment of primary education teachers on the basis of relevant criteria. Primary sources of data collection were discussed, bibliographically, in the historical and social context of the above period.
Nearby Supernova Factory Observations of SN 2006D: On Sporadic Carbon Signatures in Early Type Ia Supernova Spectra
Creators: name: Factory, The Nearby Supernova
name: :
name: Thomas, R. C.
name: Aldering, G.
name: Antilogus, P.
name: Aragon, C.
name: Bailey, S.
name: Baltay, C.
name: Baron, E.
name: Bauer, A.
name: Buton, C.
name: Bongard, S.
name: Copin, Y.
name: Gangler, E.
name: Gilles, S.
name: Kessler, R.
name: Loken, S.
name: Nugent, P.
name: Pain, R.
name: Parrent, J.
name: Pecontal, E.
name: Pereira, R.
name: Perlmutter, S.
name: Rabinowitz, D.
name: Rigaudier, G.
name: Runge, K.
name: Scalzo, R.
name: Smadja, G.
name: Wang, L.
name: Weaver, B. A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present four spectra of the Type Ia supernova (SN Ia) 2006D extending from -7 to +13 days with respect to B-band maximum. The spectra include the strongest signature of unburned material at photospheric velocities observed in a SN Ia to date. The earliest spectrum exhibits C II absorption features below 14,000 km/s, including a distinctive C II λ6580 absorption feature. The carbon signatures dissipate as the SN approaches peak brightness. In addition to discussing implications of photospheric-velocity carbon for white dwarf explosion models, we outline some factors that may influence the frequency of its detection before and around peak brightness. Two effects are explored in this regard, including depopulation of the C II optical levels by non-LTE effects, and line-of-sight effects resulting from a clumpy distribution of unburned material with low volume-filling factor.
description: 15 pages, 4 figures, accepted for publication in Astrophysical Journal Letters
The Multiverse in an Inverted Island
Creators: name: Langhoff, Kevin
name: Murdia, Chitraang
name: Nomura, Yasunori
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the redundancies in the global spacetime description of the eternally inflating multiverse using the quantum extremal surface prescription. We argue that a sufficiently large spatial region in a bubble universe has an entanglement island surrounding it. Consequently, the semiclassical physics of the multiverse, which is all we need to make cosmological predictions, can be fully described by the fundamental degrees of freedom associated with certain finite spatial regions. The island arises due to mandatory collisions with collapsing bubbles, whose big crunch singularities indicate redundancies of the global spacetime description. The emergence of the island and the resulting reduction of independent degrees of freedom provides a regularization of infinities which caused the cosmological measure problem.
description: 11 pages, 7 figures; minor revisions