cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Ο ψευδοπλατωνικός διάλογος Αξίοχος: εισαγωγή, μετάφραση και ερμηνευτικά σχόλια
Creators: name: Γαλατάς, Ιωάννης Κωνσταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Αξίοχος
Ψευδοπλατωνικός διάλογος
Διάλογος
Axiochus
Pseudo-platonic dialogue
Dialogue

description: Σκοπός της διπλωματικής είναι η ανάλυση και η ερμηνεία του ψευδο-πλατωνικού έργου Αξίοχος. Εξετάσαμε σε ένα πρώτο επίπεδο τον χρόνο συγγραφής του έργου καθώς και τους «πιθανούς» συγγραφείς του. Επίσης, γίνεται αναφορά στα γραμματολογικά και υφολογικά στοιχεία του έργου. Ένα άλλο θέμα που θίξαμε είναι αυτό της φιλοσοφικής-ιστορικής ανάλυσης του κειμένου και των ιδεών που απορρέουν από αυτό. Στο τελευταίο στάδιο της διπλωματικής προχωρήσαμε στην εξαγωγή συμπερασμάτων, όσον αφορά τα ερωτήματα που θέσαμε στην αρχή.
description: The aim of the dissertation is the analysis and interpretation of the pseudo-platonic piece of work Axiohus. We examined in a first baseline the time of writing of the text as well as its ‘possible’ authors. Also, there is a reference to elements interrelated with the genre and art form of the text. An additional issue broached was that of the philosophical-historical analysis of the text and the ideas that spring from it. In the last stage of the dissertation we proceeded to the extraction of conclusions regarding the questions posed at the beginning.
Qualitative aspects in nonlocal dynamics
Creators: name: Coclite, Giuseppe Maria
name: Dipierro, Serena
name: Fanizza, Giuseppe
name: Maddalena, Francesco
name: Romano, Marzia
name: Valdinoci, Enrico
Publisher: name: arXiv
Year: 2021
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: In this paper we investigate, through numerical studies, the dynamical evolutions encoded in a linear one-dimensional nonlocal equation arising in peridynamcs. The different propagation regimes ranging from the hyperbolic to the dispersive, induced by the nonlocal feature of the equation, are carefully analyzed. The study of an initial value Riemann-like problem suggests the formation of a singularity.
description: 18 pages, 14 figures
Intensity-SLAM: Intensity Assisted Localization and Mapping for Large Scale Environment
Creators: name: Wang, Han
name: Wang, Chen
name: Xie, Lihua
Publisher: name: arXiv
Year: 2021
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: Simultaneous Localization And Mapping (SLAM) is a task to estimate the robot location and to reconstruct the environment based on observation from sensors such as LIght Detection And Ranging (LiDAR) and camera. It is widely used in robotic applications such as autonomous driving and drone delivery. Traditional LiDAR-based SLAM algorithms mainly leverage the geometric features from the scene context, while the intensity information from LiDAR is ignored. Some recent deep-learning-based SLAM algorithms consider intensity features and train the pose estimation network in an end-to-end manner. However, they require significant data collection effort and their generalizability to environments other than the trained one remains unclear. In this paper we introduce intensity features to a SLAM system. And we propose a novel full SLAM framework that leverages both geometry and intensity features. The proposed SLAM involves both intensity-based front-end odometry estimation and intensity-based back-end optimization. Thorough experiments are performed including both outdoor autonomous driving and indoor warehouse robot manipulation. The results show that the proposed method outperforms existing geometric-only LiDAR SLAM methods.
description: Accepted in IEEE Robotics and Automation Letters
Formation of Social Ties Influences Food Choice: A Campus-Wide Longitudinal Study
Creators: name: Gligorić, Kristina
name: White, Ryen W.
name: Kıcıman, Emre
name: Horvitz, Eric
name: Chiolero, Arnaud
name: West, Robert
Publisher: name: arXiv
Year: 2021
Subjects: subject: Social and Information Networks (cs.SI)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Nutrition is a key determinant of long-term health, and social influence has long been theorized to be a key determinant of nutrition. It has been difficult to quantify the postulated role of social influence on nutrition using traditional methods such as surveys, due to the typically small scale and short duration of studies. To overcome these limitations, we leverage a novel source of data: logs of 38 million food purchases made over an 8-year period on the Ecole Polytechnique Federale de Lausanne (EPFL) university campus, linked to anonymized individuals via the smartcards used to make on-campus purchases. In a longitudinal observational study, we ask: How is a person's food choice affected by eating with someone else whose own food choice is healthy vs. unhealthy? To estimate causal effects from the passively observed log data, we control confounds in a matched quasi-experimental design: we identify focal users who at first do not have any regular eating partners but then start eating with a fixed partner regularly, and we match focal users into comparison pairs such that paired users are nearly identical with respect to covariates measured before acquiring the partner, where the two focal users' new eating partners diverge in the healthiness of their respective food choice. A difference-in-differences analysis of the paired data yields clear evidence of social influence: focal users acquiring a healthy-eating partner change their habits significantly more toward healthy foods than focal users acquiring an unhealthy-eating partner. We further identify foods whose purchase frequency is impacted significantly by the eating partner's healthiness of food choice. Beyond the main results, the work demonstrates the utility of passively sensed food purchase logs for deriving insights, with the potential of informing the design of public health interventions and food offerings.
Timing an Accreting Millisecond Pulsar: Measuring the Accretion Torque in IGR J00291+5934
Creators: name: Burderi, L.
name: Di Salvo, T.
name: Lavagetto, G.
name: Menna, M. T.
name: Papitto, A.
name: Riggio, A.
name: Iaria, R.
name: D'antona, F.
name: Robba, N. R.
name: Stella, L.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We performed a timing analysis of the fastest accreting millisecond pulsar IGR J00291+5934 using RXTE data taken during the outburst of December 2004. We corrected the arrival times of all the events for the orbital (Doppler) effects and performed a timing analysis of the resulting phase delays. In this way we have the possibility to study, for the first time in this class of sources, the spin-up of a millisecond pulsar as a consequence of accretion torques during the X-ray outburst. The accretion torque gives us for the first time an independent estimate of the mass accretion rate onto the neutron star, which can be compared with the observed X-ray luminosity. We also report a revised value of the spin period of the pulsar.
description: 7 pages including 1 figure. Accepted for publication by ApJ; revised version including proof corrections
Magnetic fields at the periphery of UCHII regions from carbon recombination line observations
Creators: name: Roshi, D. Anish
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Several indirect evidences indicate a magnetic origin for the non-thermal width of spectral lines observed toward molecular clouds. In this letter, I suggest that the origin of the non-thermal width of carbon recombination lines (CRLs) observed from photo-dissociation regions (PDRs) near ultra-compact \HII\ regions is magnetic and that the magnitude of the line width is an estimate of the \alfven speed. The magnetic field strengths estimated based on this suggestion compare well with those measured toward molecular clouds with densities similar to PDR densities. I conclude that multi-frequency CRL observations have the potential to form a new tool to determine the field strength near star forming regions.
description: To appear in ApJ Letters
Finite Generation of Canonical Ring by Analytic Method
Creators: name: Siu, Yum-Tong
Publisher: name: arXiv
Year: 2008
Subjects: subject: Complex Variables (math.CV)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 32J25, 14E30

description: In the 80th birthday conference for Professor LU Qikeng in June 2006 I gave a talk on the analytic approach to the finite generation of the canonical ring for a compact complex algebraic manifold of general type. This article is my contribution to the proceedings of that conference from my talk. In this article I give an overview of the analytic proof and focus on explaining how the analytic method handles the problem of infinite number of interminable blow-ups in the intuitive approach to prove the finite generation of the canonical ring. The proceedings of the LU Qikeng conference will appear as Issue No. 4 of Volume 51 of Science in China Series A: Mathematics (www.springer.com/math/applications/journal/11425).
Nucleon decay in gauge unified models with intersecting D6-branes
Creators: name: Chemtob, Marc
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Baryon number violation is discussed in gauge unified orbifold models of type II string theory with intersecting Dirichlet branes. We consider setups of D6-branes which extend along the flat Minkowski space-time directions and wrap around 3-cycles of the internal 6-d manifold. The discussion is motivated by the enhancement effect of low energy amplitudes anticipated for M-theory and type II string theory models with matter modes localized at points of the internal manifold. The conformal field theory formalism is used to evaluate the open string amplitudes at tree level. We study the single baryon number violating processes of dimension 6 and 5, involving four quarks and leptons and in supersymmetry models, two pairs of matter fermions and superpartner sfermions. The higher order processes associated with the baryon number violating operators of dimension 7 and 9 are also examined, but in a qualitative way. We discuss the low energy representation of string theory amplitudes in terms of infinite series of poles associated to exchange of string Regge resonance and compactification modes. The comparison of string amplitudes with the equivalent field theory amplitudes is first studied in the large compactification radius limit. Proceeding next to the finite compactification radius case, we present a numerical study of the ratio of string to field theory amplitudes based on semi-realistic gauge unified non-supersymmetric and supersymmetric models employing the Z3 and Z2xZ2 orbifolds. We find a moderate enhancement of string amplitudes which becomes manifest in the regime where the gauge symmetry breaking mass parameter exceeds the compactification mass parameter, corresponding to a gauge unification in a seven dimensional space-time.
description: 63 pages revtex4. 8 postscript figures. 4 tables. Subsection II.B revised. Several new references added. To appear in Physical Review D
Lightweight 3-D Localization and Mapping for Solid-State LiDAR
Creators: name: Wang, Han
name: Wang, Chen
name: Xie, Lihua
Publisher: name: arXiv
Year: 2021
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: The LIght Detection And Ranging (LiDAR) sensor has become one of the most important perceptual devices due to its important role in simultaneous localization and mapping (SLAM). Existing SLAM methods are mainly developed for mechanical LiDAR sensors, which are often adopted by large scale robots. Recently, the solid-state LiDAR is introduced and becomes popular since it provides a cost-effective and lightweight solution for small scale robots. Compared to mechanical LiDAR, solid-state LiDAR sensors have higher update frequency and angular resolution, but also have smaller field of view (FoV), which is very challenging for existing LiDAR SLAM algorithms. Therefore, it is necessary to have a more robust and computationally efficient SLAM method for this new sensing device. To this end, we propose a new SLAM framework for solid-state LiDAR sensors, which involves feature extraction, odometry estimation, and probability map building. The proposed method is evaluated on a warehouse robot and a hand-held device. In the experiments, we demonstrate both the accuracy and efficiency of our method using an Intel L515 solid-state LiDAR. The results show that our method is able to provide precise localization and high quality mapping. We made the source codes public at \url{https://github.com/wh200720041/SSL_SLAM}.
description: Accepted by IEEE Robotics and Automation Letters
Electronic structure and elastic properties of Cd$_{16}$Se$_{15}$Te solid state solution: first principles study
Creators: name: Kashuba, A. I.
name: Andriyevsky, B.
name: Ilchuk, H. A.
name: Petrus, R. Yu.
name: Malyi, T. S.
name: Semkiv, I. V.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The electronic band structure and elastic properties of the Cd${}_{16}$Se${}_{15}$Te solid state solution in the framework of the density functional theory calculations are investigated. The structure of the sample is constructed on the original binary compound CdSe, which crystallizes in the cubic phase. Based on the electronic band structure, the effective mass of electron, heavy hole, light hole, spin-orbit effective masses and reduced mass in G point are calculated. In addition, the exciton binding energy, refractive index and high-frequency dielectric constant are calculated. The Young modulus, shear modulus, bulk modulus and Poisson ratio are calculated theoretically. Based on the results of elastic coefficients, the value of acoustic velocity and Debye temperature is obtained.
description: 10 pages, 3 figures, 6 tables
Μελέτη σύνθεσης βλασουλαμίνης Α
Creators: name: Κελεσίδης, Αντώνιος Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Χημεία
Σύνθεση
Σεσκιτερπένια
Chemistry
Synthesis
Sesquiterpenes

description: Βασικός στόχος της παρούσας εργασίας ήταν η εύρεση συνθετικής πορείας για την εργαστηριακή σύνθεση της βλασουλαμίνης Α. Το μόριο στόχος αποτελείται από δύο όμοιες μονάδες σεσκιτερπενοειδών λακτονών και έναν αμινικό πολυκυκλικό πυρήνα. Αρχικά, από το φυσικό τερπένιο R-(-)-καρβόνη, ξεκινά μια αλληλουχία ποικιλίας αντιδράσεων που αποσκοπούν στη σύνθεση των σεσκιτερπενικών μονάδων. Οι αρχικές αντιδράσεις έως και τη σύνθεση ενός ενδιαμέσου καρβοξυλικού οξέος είχαν μελετηθεί στο παρελθόν από την ομάδα μας, παρατίθενται παρόλα αυτά σχετικές βελτιώσεις σε ορισμένα στάδια. Ακολουθούν διάφορες δοκιμές προς την παραγωγή του αντίστοιχου λακτονικού παραγώγου που πραγματοποιείται εν τέλει φωτοχημικά με τη χρήση NBS. Έπειτα, εξετάζεται η δράση οργανομεταλλικών αντιδραστηρίων ως αλκυλιωτικοί παράγοντες και συγκεκριμένα αντιδραστηρίων του μαγνησίου, του λιθίου και του δημητρίου. Μελετώνται επίσης οι παράμετροι που χαρακτηρίζουν τις περικυκλικές αντιδράσεις και συγκεκριμένα της μετάθεσης Cope και της αντίδρασης ενίου. Τέλος, σχετικά με τη σύνθεση του ετεροκυκλικού πυρήνα του μορίου, μελετούνται οι παράμετροι της παραγωγής εναμινών με τη χρήση πυρρολιδίνης και υδροξυακετόνης και η αντίδραση του παραγόμενου ενδιαμέσου με την 4 θέση ενός α, β-ακόρεστου κυκλικού εστέρα.
description: The main goal of this particular project was the discovery of a synthetic route for natural product vlasoulamine A. The target molecule is composed out of two identical sesquiterpene lactone units and a nitrogen polycyclic core. Initially, using the natural terpene R-(-)-carvone, begins a sequence of a variety of reactions aiming at the synthesis of the sesquiterpene units. The first reactions up to the synthesis of a carboxylic acid intermediate were studied by our group in the past. However, relevant improvements are pointed out in a few transformations. The work continues with various tests aimed at the production of the corresponding lactone derivative, which is eventually carried out photochemically with the use of NBS. Afterwards, the nature of organometallic reactants as alkylating agents, is considered and more precisely those of magnesium, lithium and cerium. Later on, the characteristics of pericyclic reactions is studied and more precisely those of the Cope rearrangement and of the ene reaction. Finally, regarding the synthesis of the heterocyclic core of the molecule, the parametres of enamine production with the use of pyrrolidine and hydroxyacetone and the product’s reaction with the carbon 4 of a α, β-unsaturated cyclic ester group, are studied.
Introducing Physical Warp Drives
Creators: name: Bobrick, Alexey
name: Martire, Gianni
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The Alcubierre warp drive is an exotic solution in general relativity. It allows for superluminal travel at the cost of enormous amounts of matter with negative mass density. For this reason, the Alcubierre warp drive has been widely considered unphysical. In this study, we develop a model of a general warp drive spacetime in classical relativity that encloses all existing warp drive definitions and allows for new metrics without the most serious issues present in the Alcubierre solution. We present the first general model for subluminal positive-energy, spherically symmetric warp drives; construct superluminal warp-drive solutions which satisfy quantum inequalities; provide optimizations for the Alcubierre metric that decrease the negative energy requirements by two orders of magnitude; and introduce a warp drive spacetime in which space capacity and the rate of time can be chosen in a controlled manner. Conceptually, we demonstrate that any warp drive, including the Alcubierre drive, is a shell of regular or exotic material moving inertially with a certain velocity. Therefore, any warp drive requires propulsion. We show that a class of subluminal, spherically symmetric warp drive spacetimes, at least in principle, can be constructed based on the physical principles known to humanity today.
description: Accepted in CQG, comments welcome
Geodesics on Flat Surfaces
Creators: name: Zorich, Anton
Publisher: name: arXiv
Year: 2006
Subjects: subject: Dynamical Systems (math.DS)
subject: Geometric Topology (math.GT)
subject: FOS: Mathematics

description: This short survey illustrates the ideas of Teichmuller dynamics. As a model application we consider the asymptotic topology of generic geodesics on a "flat" surface and count closed geodesics and saddle connections. This survey is based on the joint papers with A.Eskin and H.Masur and with M.Kontsevich.
description: (25 pages, 5 figures) Based on the talk at ICM 2006 at Madrid; see Proceedings of the ICM, Madrid, Spain, 2006, EMS, 121-146 for the final version. For a more detailed survey see the paper "Flat Surfaces", arXiv.math.DS/0609392
Life history of a collection: the Tahltan materials collected by James A. Teit
Creators: name: Fenn, Catherine
Publisher: name: University of British Columbia
Year: 2008

description: This paper documents the life history of the Tahltan materials from northwestern British Columbia collected by James A. Teit in 1912 and 1915 for the Geological Survey of Canada. The paper situates the collector's work in the social and institutional contexts that influenced his activities, gives recognition to the Tahltan people who contributed to the collection’s construction, and provides an overview of how the collection is currently organized in the Canadian Museum of Civilization (CMC). I address the questions: what is the life history of this collection? and what constitutes this collection today? Naming and classifying activities, macro-systems of museum classification, contribute to, and indeed create, the dispersed nature of large museum collections. Removed from communities and social settings, assembled 'artefacts' are dispersed to central holding agencies far afield from ethnographic sites and the originating peoples. Thus, the paper focusses on the relationship between field collecting and museum collections as archival records exemplified by the collection assembled by Teit in northwestern British Columbia. Further, the paper addresses the issues arising from the report of the Task Force on Museums and First Peoples (1992). The conclusions of the Task Force call for improved access to collections by aboriginal peoples and point to the pressing need to carry out inventories of existing collections. Originally created to accommodate and even facilitate academic research, museum classification practices actually impede the implementation of the Task Force's recommendations.
Synchronizability determined by coupling strengths and topology on Complex Networks
Creators: name: Gomez-Gardenes, Jesus
name: Moreno, Yamir
name: Arenas, Alex
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We investigate in depth the synchronization of coupled oscillators on top of complex networks with different degrees of heterogeneity within the context of the Kuramoto model. In a previous paper [Phys. Rev. Lett. 98, 034101 (2007)], we unveiled how for fixed coupling strengths local patterns of synchronization emerge differently in homogeneous and heterogeneous complex networks. Here, we provide more evidence on this phenomenon extending the previous work to networks that interpolate between homogeneous and heterogeneous topologies. We also present new details on the path towards synchronization for the evolution of clustering in the synchronized patterns. Finally, we investigate the synchronization of networks with modular structure and conclude that, in these cases, local synchronization is first attained at the most internal level of organization of modules, progressively evolving to the outer levels as the coupling constant is increased. The present work introduces new parameters that are proved to be useful for the characterization of synchronization phenomena in complex networks.
description: 11 pages, 10 figures and 1 table. APS format
A Duality Exact Sequence for Legendrian Contact Homology
Creators: name: Ekholm, Tobias
name: Etnyre, John B.
name: Sabloff, Joshua M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Symplectic Geometry (math.SG)
subject: Geometric Topology (math.GT)
subject: FOS: Mathematics

description: We establish a long exact sequence for Legendrian submanifolds L in P x R, where P is an exact symplectic manifold, which admit a Hamiltonian isotopy that displaces the projection of L off of itself. In this sequence, the singular homology H_* maps to linearized contact cohomology CH^* which maps to linearized contact homology CH_* which maps to singular homology. In particular, the sequence implies a duality between the kernel of the map (CH_*\to H_*) and the cokernel of the map (H_* \to CH^*). Furthermore, this duality is compatible with Poincare duality in L in the following sense: the Poincare dual of a singular class which is the image of a in CH_* maps to a class αin CH^* such that α(a)=1. The exact sequence generalizes the duality for Legendrian knots in Euclidean 3-space [24] and leads to a refinement of the Arnold Conjecture for double points of an exact Lagrangian admitting a Legendrian lift with linearizable contact homology, first proved in [6].
description: 57 pages, 10 figures. Improved exposition and expanded analytic detail
Grammatical and phonological elicitation: Wordhood and stress
Creators: name: Palacio, Frank
name: Dabkowski, Maksymilian
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2022
Subjects: subject: cab

description: Wordhood of the affixes and auxiliaries future ba, nonfuture mu, -gi 'still,' potential -di, imperfective -ñei, and imperatives. Vowel hiatus resolution on úwi 'meat,' iráhü 'child,' isáni 'child,' arüna 'arm,' wuri 'woman.'
First-principles investigation of half-metallic ferromagnetism of Fe$_2$YSn (Y = Mn, Ti and V) Heusler alloys
Creators: name: Sayah, M.
name: Zeffane, S.
name: Mokhtari, M.
name: Dahmane, F.
name: Zekri, L.
name: Khenata, R.
name: Zekri, N.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: In this paper, we use the first-principles calculations based on the density functional theory to investigate structural, electronic and magnetic properties of Fe$_{2}$YSn with (Y = Mn, Ti and V). The generalized gradient approximation (GGA) method is used for calculations. The Cu$_{2}$MnAl type structure is energetically more stable than the Hg$_{2}$CuTi type structure. The negative formation energy is shown as the evidence of thermodynamic stability of the alloy. The calculated total spin moment is found as 3$μ_\text{B}$ and 0$μ_\text{B}$ at the equilibrium lattice constant for Fe$_{2}$MnSn and Fe$_{2}$TiSn respectively, which agrees with the Slater-Pauling rule of $M_t= Z_t-24$. The study of electronic and magnetic properties proves that Fe$_{2}$MnSn and Fe$_{2}$TiSn full-Heusler alloys are complete half-metallic ferromagnetic materials.
description: 9 pages, 4 figures, 2 tables
Δόμηση εντός εκτάσεων δασικού χαρακτήρα και κτηματολόγιο. (Η περίπτωση του δασοκτήματος Σταυρονικήτα)
Creators: name: Τσαλικίδης, Μιχαήλ Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: subject: Δάσος
subject: Δόμηση
subject: Κτηματολόγιο
subject: Forest
subject: Building
subject: FOS: Civil engineering
subject: Cadastre

description: Η παρούσα εργασία πραγματεύεται την υλοποίηση ενός μεγάλου εγχειρήματος που ξεκίνησε την δεκαετία του 60, όταν στο πλαίσιο της επερχόμενης τουριστικής ανάπτυξης, αποφασίστηκε να αξιοποιηθεί τουριστικά μια ευρύτερη παραθαλάσσια αγροτοδασική περιοχή στην Κασσάνδρα Χαλκιδικής και ολοκληρώθηκε με την μεταξύ άλλων οικιστική δόμηση ενός από τα ομορφότερα παραθαλάσσια δάση της πατρίδας μας. Στην εργασία γίνεται αναφορά στο νομικό καθεστώς που διέπει τη δόμηση σε εκτάσεις δασικού χαρακτήρα και τις επιτρεπτές επεμβάσεις σε αυτές τις εκτάσεις, στον τρόπο απόκτησης και διατήρησης της μοναστηριακής ακίνητης περιουσίας στο πέρασμα των αιώνων, καθώς και στο νομικό πλαίσιο που διέπει τα εμπράγματα δικαιώματα των μοναστηριακών δασών από την περίοδο της βυζαντινής και οθωμανικής αυτοκρατορίας, μέχρι σήμερα. Επίσης παρουσιάζεται η μετάβαση της κυριότητας μοναστηριακών δασών στα χέρια επιχειρηματιών με σκοπό την τουριστική τους αξιοποίηση καθώς και οι παλινωδίες της Διοίκησης στο πέρασμα των χρόνων μέχρι τη διακοπή της δόμησης του δάσους σε εφαρμογή Αποφάσεων του ΣτΕ. Τέλος εξετάζεται η σημερινή κατάσταση όπως έχει διαμορφωθεί μετά την ανάρτηση και μερική κύρωση των δασικών χαρτών στην ΠΕ Χαλκιδικής και η προσπάθεια να λυθούν τα προβλήματα που έχουν προκύψει υπό το πρίσμα της ισχύουσας κτηματολογικής αλλά και της νέας περιβαλλοντικής νομοθεσίας
description: The present work deals with the implementation of a large project that began in the early 60's, with the tourism development in many parts of the country. The project was decided to be used for tourism a wider coastal agroforestry area in Kassandra, Halkidiki and resulted in the partial creation of a holiday houses settlement in one of the most beautiful coastal forest of our country. The following thesis refers to the legal status concerning the construction in forest areas and the uses which are permitted in this area as well as the way of acquisition of the monastery’s real estate over the centuries and the legal framework that governs the real estate rights of the monastery’s forests from the period of the Byzantine and Ottoman empires until today. This thesis deals with the transfer of ownership of monastery’s forests to the hands of entrepreneurs for the purpose of tourist development and also presents the changes of the State administration during the years until the cessation of house building in the implementation of Council of State decisions. Finally, the current situation is examined as it has been formed after the posting and partial ratification of the forest maps in the Prefecture of Halkidiki and the attempt to solve the problems that have arisen in the light of current Cadastral and new environmental legislation.
Rapidity and species dependence of particle production at large transverse momentum for $d$+Au collisions at \sqrt s_NN = 200 GeV
Creators: name: STAR Collaboration
Publisher: name: arXiv
Year: 2006
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We determine rapidity asymmetry in the production of charged pions, protons and anti-protons for large transverse momentum (pT) for d+Au collisions at \sqrt s_NN = 200 GeV. The identified hadrons are measured in the rapidity regions |y| < 0.5 and 0.5 < |y| < 1.0 for the pT range 2.5 < pT < 10 GeV/c. We observe significant rapidity asymmetry for charged pion and proton+anti-proton production in both rapidity regions. The asymmetry is larger for 0.5 < |y| < 1.0 than for |y|< 0.5 and is almost independent of particle type. The measurements are compared to various model predictions employing multiple scattering, energy loss, nuclear shadowing, saturation effects, and recombination, and also to a phenomenological parton model. We find that asymmetries are sensitive to model parameters and show model-preference. The rapidity dependence of π^{-}/π^{+} and \bar{p}/p ratios in peripheral d+Au and forward neutron-tagged events are used to study the contributions of valence quarks and gluons to particle production at high pT. The results are compared to calculations based on NLO pQCD and other measurements of quark fragmentation functions.
description: 14 pages and 13 figures
Thermal dissipation in the quantum Hall regime in graphene
Creators: name: Fang, J. -Y.
name: Yang, N. -X.
name: Yan, Q.
name: Guo, A. -M.
name: Sun, Q. -F.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: It is widely accepted that both backscattering and dissipation cannot occur in topological systems because of the topological protection. Here we show that the thermal dissipation can occur in the quantum Hall (QH) regime in graphene in the presence of dissipation sources, although the Hall plateaus and the zero longitudinal resistance still survive. Dissipation appears along the downstream chiral flow direction of the constriction in the Hall plateau regime, but it occurs mainly in the bulk in the Hall plateau transition regime. In addition, dissipation processes are accompanied with the evolution of the energy distribution from non-equilibrium to equilibrium. This indicates that topology neither prohibits the appearance of dissipation nor prohibits entropy increasing, which opens a new topic on the dissipation in topological systems.
description: 10 pages, 9 figures
The complexity of ergodic games
Creators: name: Chatterjee, Krishnendu
name: Ibsen-Jensen, Rasmus
Publisher: name: IST Austria
Year: 2013
Subjects: 000 Computer science, knowledge & general works

description: We study finite-state two-player (zero-sum) concurrent mean-payoff games played on a graph. We focus on the important sub-class of ergodic games where all states are visited infinitely often with probability 1. The algorithmic study of ergodic games was initiated in a seminal work of Hoffman and Karp in 1966, but all basic complexity questions have remained unresolved. Our main results for ergodic games are as follows: We establish (1) an optimal exponential bound on the patience of stationary strategies (where patience of a distribution is the inverse of the smallest positive probability and represents a complexity measure of a stationary strategy); (2) the approximation problem lie in FNP; (3) the approximation problem is at least as hard as the decision problem for simple stochastic games (for which NP and coNP is the long-standing best known bound). We show that the exact value can be expressed in the existential theory of the reals, and also establish square-root sum hardness for a related class of games.
Influence of Disorder on the Hall Effect in Bi$_2$Sr$_2$CuO$_{6+δ}$
Creators: name: Fruchter, L.
name: Raffy, H.
name: Bouquet, F.
name: Li, Z. Z.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The in-plane resistivity and Hall coefficient have been measured for the single-layer compound Bi$_2$Sr$_2$CuO$_{6+δ}$ for the whole range of doping states. The deviation of the Hall coefficient, $R_H$, from a high-temperature linear behavior and the temperature dependence of the Hall angle are both only weakly dependent upon doping, contrasting with Bi$_2$Sr$_{2-x}$La$_x$CuO$_{6+δ}$ and Bi$_2$Sr$_2$CaCuO$_{8+δ}$. This is in contradiction with former proposals that the transverse transport detects the formation of incoherent Cooper pairs in the pseudogap state. Conversely, the analysis of the data using a phenomenological angular dependent scattering rate clearly allows to distinguish between underdoped and overdoped states, and we propose that the maximum in $R_H(T)$ simply arises due to the combination of a large isotropic scattering rate and an anisotropic temperature dependent one.
{\it Ab initio} calculations of forbidden transition probabilities and lifetimes of low-lying states in V$^{4+}$
Creators: name: Dixit, Gopal
name: Sahoo, B. K.
name: Deshmukh, P. C.
name: Chaudhuri, R. K.
name: Majumder, Sonjoy
Publisher: name: arXiv
Year: 2007
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Electric quadrupole (E2) and magnetic dipole (M1) transition amplitudes among the low-lying states of quadruply ionized vanadium V$^{4+}$, important in various field of experimental and astrophysics are presented very accurately. Most of these results are reported for the first time in the literature. Relativistic coupled-cluster theory with single, double and leading triple excitations has been employed for these calculations. Estimation of different correlation effects arising through the above formalism have been highlighted by studying core and valence electrons excitations to the excited states. The lifetime of the first excited $D$- state is found to be long.
description: 16 pages in pdf output
Anisotropic compact stars in higher-order curvature theory
Creators: name: Nashed, G. G. L.
name: Odintsov, S. D.
name: Oikonomou, V. K.
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: In this paper, we shall consider spherically symmetric spacetime solutions describing the interior of stellar compact objects, in the context of higher-order curvature theory of the f(R) type. We shall derive the non--vacuum field equations of the higher-order curvature theory, without assuming any specific form of the $\mathrm{f(R)}$ theory, specifying the analysis for a spherically symmetric spacetime with two unknown functions. We obtain a system of highly non-linear differential equations, which consists of four differential equations with six unknown functions. To solve such a system, we assume a specific form of metric potentials, using the Krori-Barua ansatz. We successfully solve the system of differential equations, and we derive all the components of the energy-momentum tensor. Moreover, we derive the non-trivial general form of $\mathrm{f(R)}$ that may generate such solutions and calculate the dynamic Ricci scalar of the anisotropic star. Accordingly, we calculate the asymptotic form of the function $\mathrm{f(R)}$, which is a polynomial function. We match the derived interior solution with the exterior one, which was derived in \cite{Nashed:2019tuk}, with the latter also resulting in a non-trivial form of the Ricci scalar. Notably but rather expected, the exterior solution differs from the Schwarzschild one in the context of general relativity. The matching procedure will eventually relate two constants with the mass and radius of the compact stellar object. We list the necessary conditions that any compact anisotropic star must satisfy and explain in detail that our model bypasses all of these conditions for a special compact star $\textit {Her X--1 }$, which has an estimated mass and radius \textit {(mass = 0.85 $\pm 0.15M_{\circledcirc}$\,\, and\, \,radius $= 8.1 \pm 0.41$km)}.
description: 16 pages, 12 figures, 3 tables
The "Unromantic Pictures" of Quantum Theory
Creators: name: Tumulka, Roderich
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: I am concerned with two views of quantum mechanics that John S. Bell called ``unromantic'': spontaneous wave function collapse and Bohmian mechanics. I discuss some of their merits and report about recent progress concerning extensions to quantum field theory and relativity. In the last section, I speculate about an extension of Bohmian mechanics to quantum gravity.
description: 37 pages LaTeX, no figures; written for special volume of J. Phys. A in honor of G.C. Ghirardi
f_0(1710) production in exclusive B decays
Creators: name: Chen, Chuan-Hung
name: Yuan, Tzu-Chiang
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Production of $f_0(1710)$, a theoretical endeavor of pure scalar glueball state, is studied in detail from exclusive rare B decay within the framework of perturbative QCD. The branching fraction for $B^\pm \to K^{*\pm} f_0(1710) \to K^{*\pm} (K \bar K)$ is estimated to be about $8 \times 10^{-6}$, while for $B^\pm \to K^\pm f_0(1710) \to K^\pm (K \bar K)$ it is smaller by roughly an order of magnitude. With the accumulation of almost 1 billion $B \bar B$ pairs from the B{\tiny A}B{\tiny AR} and Belle experiments to date, hunting for a scalar glueball via these rare decay modes should be attainable.
description: 20 pages, 4 figures, 6 tables. Published version. To appear in PLB
A Contemporary Model Description of Magnetism
Creators: name: Irkhin, Valentin Yu.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: A treatment of many-electron polar and $s-d(f)$ exchange models is carried out in connection with the development of the theory of magnetism of transition and rare-earth metals, as well as their compounds. Particular emphasis is placed on the derivation of the many-electron Heisenberg, Hubbard, Anderson and $t-J$ models, as well as the internal relationship between them. Among the topics discussed are many-electron approaches in describing systems of $d$- and $f$-electrons, atomic representation of Hubbard's $X$-operators, slave-particle representations, the problem of strong itinerant magnetism and the formation of local moments, the role of non-quasiparticle (incoherent states). The application of these concepts to strongly correlated systems, in particular, to half-metallic ferromagnets and Kondo lattices, is discussed. A comparison is performed with modern field-theoretical and topological approaches.
description: In Russian, 79 p. Book Chapter in: Physics of Magnetic Materials and Nanostructures (Ekaterinburg, 2020), p.277. Extended and updated version of the paper in Phys. Met. Metallogr. 110, 602 (2010)
Evolution of Coupled Scalar and Spinor Particles in Classical Field Theory
Creators: name: Dvornikov, Maxim
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the evolution of mixed scalar as well as spinor fields within the context of the classical field theory. The initial condition problem is solved and the fields distributions, exactly accounting for the initial conditions, are obtained for both scalar and spinor fields. In the system of two coupled fields we consider the special case of the initial conditions which are rapidly oscillating functions. It is demonstrated that the energy densities of the scalar fields and the intensities of the spinor fields coincide with the usual transition and survival probabilities of neutrino flavor oscillations in vacuum.
description: Talk presented at IPM-LHP06, Tehran, Iran; PSN: IPM-LHP06-19May; 6 pages, no figures, SLAC proceedings LaTeX style (slac_two.rtx is included); minimal changes (compared to v.2) intended to improve the text were made, 2 tiny typos corrected, 1 reference was renovated
Μουσειολογικός νοηματικός σχεδιασμός έκθεσης αναφορικά με το υπερφυσικό στον ελληνικό παραδοσιακό πολιτισμό επί των συλλογών του Λαογραφικού και Εθνολογικού Μουσείου Μακεδονίας- Θράκης
Creators: name: Λαβράνος, Χρήστος Μάριος Σπυρίδωνα
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Υπερφυσικό
Μαγεία
Μουσειολογία
Supernatural
Magic
Museology

description: Θεματικό πυρήνα της παρούσας διατριβής αποτελεί η μελέτη του υπερφυσικού στα πλαίσια της πνευματικότητας του ελληνικού παραδοσιακού πολιτισμού. Στο πρώτο μέρος μελετάται η σύνθεση της λαϊκής πνευματικότητας με στοιχεία από το αρχαιοελληνικό παρελθόν και τη χριστιανική θρησκεία. Ειδικότερα, αναλύεται εκτενώς η έννοια της ψυχής, ως βασικό και διαχρονικό υπερφυσικό στοιχείο και έπειτα το φαινόμενο της μαγείας και των αντίστοιχων πρακτικών, αφού αποτελεί το σύστημα στο οποίο συγκεράζονται και εκφράζονται οι υπερφυσικές πεποιθήσεις. Το δεύτερο μέρος αποτελείται από το νοηματικό σχεδιασμό της έκθεσης αναφορικά με το παραπάνω θέμα με αντικείμενα από τις συλλογές του Λαογραφικού και Εθνολογικού Μουσείου Μακεδονίας- Θράκης. Η έκθεση τιτλοφορείται ως «Το ταξίδι της ψυχής: μια περιπλάνηση στον υπερφυσικό κόσμο του λαϊκού πολιτισμού» και κεντρική νοηματική της ιδέα αποτελεί η πορεία της ανθρώπινης ψυχής στη ζωή και το θάνατο και οι μαγικές πρακτικές και πεποιθήσεις που τη συνοδεύουν στον ελληνικό παραδοσιακό πολιτισμό. Σκοπός της έκθεσης είναι να παρουσιάσει το υπερφυσικό ως βασική συνιστώσα της λαϊκής πνευματικότητας και να άρει οποιεσδήποτε προκαταλήψεις σχετικά με αυτό.
description: The main core of this dissertation is the examination of the supernatural in the frames of greek traditional spirituality. The first part examines the composition of the common folk’s spirituality, combined with ancient greek elements and christian religion. Furthermore, it focuses on the concept of soul, as a basic and intertemporal supernatural element and examines the phenomenon of magic and relative practices, which comprises the system in which the supernatural beliefs are conjuncted and expressed. The main course of the second part is a museological conceptual planning concerning the subject mentioned above using objects from Folklife and Ethnological Museum of Macedonia- Thrace. The museological thinking behind the exhibition, which is entitled as “The journey of the soul: A wandering in the supernatural world of traditional culture”, is the course of the human soul in life and death and the magical practices and beliefs correlated to it in traditional greek culture. The main goal of this potential exhibition is to present the supernatural as a principal component of common folk’s spirituality and to alleviate the existing taboos about it.
description: Σε συνεργασία με: Παιδαγωγικό Δημοτικής Εκπαίδευσης (Πανεπιστήμιο Δυτικής Μακεδονίας)
Additional file 10 of Breeding history and candidate genes responsible for black skin of Xichuan black-bone chicken
Creators: name: Li, Donghua
name: Sun, Guirong
name: Zhang, Meng
name: Cao, Yanfang
name: Zhang, Chenxi
name: Fu, Yawei
name: Li, Fang
name: Li, Guoxi
name: Jiang, Ruirui
name: Han, Ruili
name: Li, Zhuanjian
name: Wang, Yanbin
name: Tian, Yadong
name: Liu, Xiaojun
name: Li, Wenting
name: Kang, Xiangtao
Publisher: name: figshare
Year: 2020
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 10: Supplementary Table S6. Time of divergence between populations.
Neoglacial climate in the Southern Coast Mountains, British Columbia
Creators: name: Evans, Martin Grant
Publisher: name: University of British Columbia
Year: 2008

description: Palaeobotanical records of Holocene climate change in the southern Coast Mountains identify a cooler/wetter Neoglacial period subsequent to 6600 BP. Geomorphic evidence of alpine glacier advance suggests that there were three distinct cooler/wetter periods during the Neoglacial, but this pattern has not been identified in palaeobotanical studies. By careful selection of a sensitive alpine site this thesis has recognised this structure in a palynological record of Neoglacial climate. This continuous record of Neoglacial climate which has the same basis as records of early Holocene climate (i.e. palynological) and hence allows more direct comparisons of the two periods. Pollen spectra, conifer needle macrofossils, organic matter content, and magnetic susceptibility were assessed for a 4800 year continuous sequence of sediment from an alpine lake. Calibration of the Picea/Pinus pollen ratio by using an altitudinal transect of surface pollen samples allowed partial quantification of shifts in treeline. Treeline at the site was at least 85 m above the present level from 4800-3800 BP, suggesting that summer temperatures were at least 0.6°C above the present. High treeline until 3800 BP indicates a relatively late date for the Hypsithermal/Neoglacial transition at this site. Alternatively, the apparent complexity of this transition in the Coast Mountains may be due to difficulties of separating temperature and precipitation signals in many climatic records. Treeline declined to near present levels by 2500 BP and was lower than present from 2500-1500 BP and from 1200 BP until close to the present. Estimates of equilibrium line altitude depression for Coast Mountain glaciers during the Little Ice Age suggest that these periods of lower treeline were due to a cooling of up to 0.8°C. During the last 5000 years the Southern Coast Mountains have experienced fluctuations on the order of 1.5°C.
Chemistry and line emission from evolving Herbig Ae disks
Creators: name: Jonkheid, B.
name: Dullemond, C. P.
name: Hogerheijde, M. R.
name: van Dishoeck, E. F.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Aims: To calculate chemistry and gas temperature of evolving protoplanetary disks with decreasing mass or dust settling, and to explore the sensitivity of gas-phase tracers. Methods: The density and dust temperature profiles for a range of models of flaring and self-shadowed disks around a typical Herbig Ae star are used together with 2-dimensional ultraviolet (UV) radiative transfer to calculate the chemistry and gas temperature. In each model the line profiles and intensities for the fine structure lines of [O I], [C II] and [C I] and the pure rotational lines of CO, CN, HCN and HCO+ are determined. Results: The chemistry shows a strong correlation with disk mass. Molecules that are easily dissociated, like HCN, require high densities and large extinctions before they can become abundant. The products of photodissociation, like CN and C2H, become abundant in models with lower masses. Dust settling mainly affects the gas temperature, and thus high temperature tracers like the O and C+ fine structure lines. The carbon chemistry is found to be very sensitive to the adopted PAH abundance. The line ratios CO/13CO, CO/HCO+ and [O I] 63 um/146 um can be used to distinguish between disks where dust growth and settling takes place, and disks that undergo overall mass loss.
description: 14 pages, 12 figures. Accepted for publication in A&A