cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Μηχανισμοί ελέγχου της ηλεκτρικής δραστηριότητας στην καρδιά της μέλισσας Apis mellifera macedonica
Creators: name: Παπαευθυμίου, Χρυσοβαλάντης
Publisher: name: Aristotle University of Thessaloniki
Year: 2005
Subjects: Apis mellifera
Καρδιοτοξικότητα
Cardiotoxicity

description: Σκοπός της παρούσας διατριβής ήταν η διερεύνηση των μηχανισμών ελέγχου της ηλεκτρικής δραστηριότητας στην καρδιά της μέλισσας, Apis mellifera macedonia. Η ιστολογική μελέτη έγινε με οπτική μικροσκοπία και η νεύρωση της περιοχής της καρδιάς με χρώση χλωριούχου κοβαλτίου. Η ηλεκτρομηχανική δραστηριότητα διερευνήθηκε in vitro με μεταγωγέα τάσης, αναρροφητικότητα και ενδοκυτταρικά μικροηλεκτρόδια, έγχυση ρεύματος και ηλεκτρόδια μεμβρανικού τεμαχίου. Ο καρδιακός ρυθμός in vitro δε διαφοροποιείται σε χειμερινές και θερινές μέλισσες. Η καρδιά αποτελείται από 5 μεταμερίδα και αναρτάται στο εσωτερικό της κοιλιάς με 5 ζεύγη πλευρικών μυών. Η καρδιά και πλευρικοί μύες αποτελούνται από γραμμωτά μυϊκά κύτταρα με μήκος σαρκομεριδίου 2 και 7μm αντίστοιχα το πάχος του καρδιακού τοιχώματος είναι μεγαλύτερο στο πρόσθιο σε σχέση με το οπίσθιο τμήμα της καρδιάς. Τα καρδιακά δυναμικά ενέργειας χαρακτηρίζονται από σύντομη διάρκεια, απουσία υψιπέδου και μικρή απόλυτη ανερέθιστη περίοδο. Η ταχύτητα αγωγής είναι μεγαλύτερη μεταξύ 5ου-4ου μεταμεριδίου. Τα καρδιακά μυϊκά κύτταρα ηλεκτρικώς συζευγμένα. Ο οπίσθιος βηματοδότης είναι γρηγορότερος και πρόσθιος αργόγερος. Η παρουσία οκτοπαμινεργικών νευρικών απολήξεων στην καρδιά είναι πιθανή. Η οκταπαμίνη διεγείρει τη λειτουρία της καρδιάς όπως και η ακετυλοχολίνη. Η αναστολή της καρδιάς ελέγχεται από την αναστροφή του καρδιακού παλμού. Η καρδιά και οι πλευρικοί μύες είναι ηλεκτρική συζευγμένοι. Ο 1ος πλευρικός μυς είναι ο μοναδικός που διαθέτει ανεξάρτητη βηματοδοτική δραστηριότητα
description: The purpose of the present study was to investigate the mechanism that control the electrical activity in the heart of the worker honeybee, Apis mellifera macedonica.Optical microscopy and cobalt chloride dyeing were used in order to study the histology and innervation of the heart region. The electromechanical activity and current injection. The heart consists of 5 chambers and 5 pairs of alary muscles support the heart within the abdomen. The heart and alary muscles are composed from striated muscle cells with a sarcomere of 2 and 7 μm in length perspectively. The width of heart rate wall increases significantly in the anterior region in comparison with the posterior heart. Heart rate in vitro is independent of the physiological type of bee(summer of winter bee) cardiac action potential are characterized by the short duration, absence of plateau and the short absolute refractory period. The conduction velocity is higher at the posterior region of the heart. Cardiac muscle cells are electrically coupled the posterior pacemaker is fastest and the anterior one is the slowest. Octodamine and acetylcholine stimulate the heart the inhibition of the heart is probably controlled by heartbeat reversal heart and alamy muscles are electricity coupled the isolated alary muscle of the 1st cardiac chamber is the only one that displays pacemaker activity
Study on N Omega-bar systems in a chiral quark model
Creators: name: Zhang, D.
name: Huang, F.
name: Dai, L. R.
name: Yu, Y. W.
name: Zhang, Z. Y.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The N Omega-bar systems with spin S=1 and S=2 are dynamically investigated within the framework of the chiral SU(3) quark model and the extended chiral SU(3) quark model by solving the resonating group method (RGM) equation. The model parameters are taken from our previous work, which gave a good description of the energies of the baryon ground states, the binding energy of deuteron, and the experimental data of the nucleon-nucleon (NN) and nucleon-hyperon (NY) scattering processes. The results show that N Omega-bar states with spin S=1 and S=2 can be bound both in the chiral SU(3) and extended chiral SU(3) quark models, and the binding energies are about 28-59 MeV. When the annihilation effect is considered, the binding energies increase to about 37-130 MeV, which indicates the annihilation effect plays a relatively important role in forming an N Omega-bar bound state. At the same time, the N Omega-bar elastic scattering processes are also studied. The S, P, D partial wave phase shifts and the total cross sections of S=1 and S=2 channels have been calculated by solving the RGM equation for scattering problems.
description: 16 pages, 7 figures
Long time-series NDVI reconstruction in cloud-prone regions via spatio-temporal tensor completion
Creators: name: Chu, Dong
name: Shen, Huanfeng
name: Guan, Xiaobin
name: Chen, Jing M.
name: Li, Xinghua
name: Li, Jie
name: Zhang, Liangpei
Publisher: name: arXiv
Year: 2021
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: The applications of Normalized Difference Vegetation Index (NDVI) time-series data are inevitably hampered by cloud-induced gaps and noise. Although numerous reconstruction methods have been developed, they have not effectively addressed the issues associated with large gaps in the time series over cloudy and rainy regions, due to the insufficient utilization of the spatial and temporal correlations. In this paper, an adaptive Spatio-Temporal Tensor Completion method (termed ST-Tensor) method is proposed to reconstruct long-term NDVI time series in cloud-prone regions, by making full use of the multi-dimensional spatio-temporal information simultaneously. For this purpose, a highly-correlated tensor is built by considering the correlations among the spatial neighbors, inter-annual variations, and periodic characteristics, in order to reconstruct the missing information via an adaptive-weighted low-rank tensor completion model. An iterative l1 trend filtering method is then implemented to eliminate the residual temporal noise. This new method was tested using MODIS 16-day composite NDVI products from 2001 to 2018 obtained in the region of Mainland Southeast Asia, where the rainy climate commonly induces large gaps and noise in the data. The qualitative and quantitative results indicate that the ST-Tensor method is more effective than the five previous methods in addressing the different missing data problems, especially the temporally continuous gaps and spatio-temporally continuous gaps. It is also shown that the ST-Tensor method performs better than the other methods in tracking NDVI seasonal trajectories, and is therefore a superior option for generating high-quality long-term NDVI time series for cloud-prone regions.
description: 12 figures, 1 tables
Knee joint forces in the “Serra da Estrela” territory: the Trails4Health project
Creators: name: Costa, Mário Jorge
name: Bragada, José
name: Santos, Catarina
name: Casanova, Natalina
name: Casanova, Jorge
name: Bartolomeu, Raúl
Publisher: name: Motricidade
Year: 2019

description: The aim of this study was to characterize knee joint forces in different trails from the Serra da Estrela with distinct characteristics. Twenty-nine subjects (20 males and 9 females), mean of 28.04±10.79 years, 1.73±0.09 m of height and 69.59±11.00 kg of body mass volunteered for this study. In separate days, all subjects underwent three hikes (trail 1: circular, 10970m; trail 2: linear, 9053m; trail 3: circular, 7536m). A GPS device (Fenix 5, Garmin, USA) was used to ensure a consistent 5 km·h-1 pace and tracking the slopes. The knee joint forces, namely the maximum patellofemoral compressive force (MaxPcF), the maximum tibiofemoral shear force (MaxTsF) expressed as times the body weight (xBW) and the load equivalent (LE) were estimated. The MaxPcF was 2.1, 1.8 and 2.1, and the MaxTsF was 0.83, 0.80 and 0.83 for trails 1, 2 and 3, respectively. The MaxPcF for trail 1 is equivalent to a flat 17386 m walk and MaxTsF is equivalent to a 10980 m walk. The MaxPcF for trail 2 is equivalent to a flat 12605 m walk and MaxTsF is equivalent to a 8320 m walk. The MaxPcF for trail 3 is equivalent to a flat 12357 m walk and MaxTsF is equivalent to a 7532 m walk. According to the LE, trail 1 can be classified as “moderate”, and trails number 2 and 3 are classified as “pleasant”. Main data suggests that trail number 2 elicited less knee compression and shear forces. In contrast, trails number 1 and 3 are less appropriate for those who suffered from previous knee pain.
description: Motricidade, Vol 15 No 1 (2019): Motricidade, Volume 15, n.º 1
Physicists, Non Physical Topics, and Interdisciplinarity
Creators: name: Galam, Serge
Publisher: name: arXiv
Year: 2022
Subjects: subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: Defining interdisciplinary physics today requires first a reformulation of what is physics today, which in turn calls for clarifying what makes a physicist. This assessment results from my forty year journey arguing and fighting to build sociophysics. My view on interdisciplinary physics has thus evolved jumping repeatedly to opposite directions before settling down to the following claim: today physics is what is done by physicists who handle a problem the "physicist's way". However the training of physicists should stay restricted to inert matter. Yet adding a focus on the universality of the physicist approach as a generic path to investigate a topic. Consequently, interdisciplinary physics should become a cabinet of curiosities including an incubator. The cabinet of curiosities would welcome all one shots papers related to any kind of object provided it is co-authored at least by one physicist. Otherwise the paper should uses explicitly technics from physics. In case a topic gets many papers, it would be moved to the incubator to foster the potential emergence of a new appropriate subfield of physics. A process illustrated by the subsection social physics in Frontiers in physics.
description: 14 pages, Contribution on "Editor's Challenge in Interdisciplinary Physics: What is Interdisciplinary Physics?" in Frontiers in Physics
Οι τιμητικοί τίτλοι επί Κομνηνών(1081-1185)
Creators: name: Γεωργίου, Σταύρος Γ.
Publisher: name: Aristotle University of Thessaloniki
Year: 2005
Subjects: Αυλική ιεραρχία
Αξιώματα
Court hierarchy

description: Το αντικείμενο της διατριβής είναι οι τιμητικοί τίτλοι επί Κομνηνών(1081-1185). Η υιοθέτηση ενός νέου συστήματος τιμητικών τίτλων υπήρξε μια από τις σημαντικότερες μεταρρυθμίσεις του ιδρυτή της δυναστείας Αλεξίου Α' Κομνηνού. Ο στόχος της διατριβής είναι διπλός : από τη μια να περιγραφεί η δομή της νέας ιεραρχίας των τιμητικών τίτλων και από την άλλη να διερευνηθεί η σχέση του νέου συστήματος αξιών με τις αλλαγές που επιχειρούνται στη διοίκηση και στις νέες αντιλήψεις που εισήγαγαν οι Κομνηνοί στη διακυβέρνηση της Αυτοκρατορίας. Αυτό επιχειρείται με τη μελέτη των πηγών και την αξιοποίηση της βιβλιογραφίας. Ταυτόχρονα εξετάζονται πολλά επιμέρους ζητήματα(τιμητικές προσφωνήσεις, ενδύματα, κ.ά)
description: The subject of this thesis is the honorific titles of the Comnenian Era(1081-1185), one of the most important innovation of Alexios I Komnenos(1081-1118). The intention of research is both the description of the new hierarchy of honorific titles and the verification of the relation between the new system of titles and the new perceptions introduced by the Comneni in to Administration. It is also examined many other issues(vestments, insignia etc). That is succeeded through the research of sources and secondary bibliography
Sinking microplastics in the water column: simulations in the Mediterranean Sea
Creators: name: de la Fuente, Rebeca
name: Drótos, Gábor
name: Hernández-García, Emilio
name: López, Cristóbal
name: van Sebille, Erik
Publisher: name: arXiv
Year: 2021
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: FOS: Physical sciences

description: We study the vertical dispersion and distribution of negatively buoyant rigid microplastics within a realistic circulation model of the Mediterranean sea. We first propose an equation describing their idealized dynamics. In that framework, we evaluate the importance of some relevant physical effects: inertia, Coriolis force, small-scale turbulence and variable seawater density, and bound the relative error of simplifying the dynamics to a constant sinking velocity added to a large-scale velocity field. We then calculate the amount and vertical distribution of microplastic particles on the water column of the open ocean if their release from the sea surface is continuous at rates compatible with observations in the Mediterranean. The vertical distribution is found to be almost uniform with depth for the majority of our parameter range. Transient distributions from flash releases reveal a non-Gaussian character of the dispersion and various diffusion laws, both normal and anomalous. The origin of these behaviors is explored in terms of horizontal and vertical flow organization.
L^{2}-restriction bounds for eigenfunctions along curves in the quantum completely integrable case
Creators: name: Toth, John A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: We show that for a quantum completely integrable system in two dimensions,the $L^{2}$-normalized joint eigenfunctions of the commuting semiclassical pseudodifferential operators satisfy restriction bounds ofthe form $ \int_γ |ϕ_{j}^{\hbar}|^2 ds = {\mathcal O}(|\log \hbar|)$ for generic curves $γ$ on the surface. We also prove that the maximal restriction bounds of Burq-Gerard-Tzvetkov are always attained for certain exceptional subsequences of eigenfunctions.
description: Correct some typos and added some more detail in section 2
[Elicitation session in pairs]
Creators: name: Palacio, Philip Tim
name: Cathcart, Chundra
name: Stickles, Elise
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2020
Subjects: subject: cab

description: 4 WAV, 3 TextGrid, and 2 TXT files.
Garifuna complement clauses (esc_cac_02).
Story text elicitation (esc_cac_02, esc_cac_04).
Universal fractal structures in the weak interaction of solitary waves in generalized nonlinear Schrödinger equations
Creators: name: Zhu, Yi
name: Yang, Jianke
Publisher: name: arXiv
Year: 2007
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: Weak interactions of solitary waves in the generalized nonlinear Schrödinger equations are studied. It is first shown that these interactions exhibit similar fractal dependence on initial conditions for different nonlinearities. Then by using the Karpman-Solov'ev method, a universal system of dynamical equations is derived for the velocities, amplitudes, positions and phases of interacting solitary waves. These dynamical equations contain a single parameter, which accounts for the different forms of nonlinearity. When this parameter is zero, these dynamical equations are integrable, and the exact analytical solutions are derived. When this parameter is non-zero, the dynamical equations exhibit fractal structures which match those in the original wave equations both qualitatively and quantitatively. Thus the universal nature of fractal structures in the weak interaction of solitary waves is analytically established. The origin of these fractal structures is also explored. It is shown that these structures bifurcate from the initial conditions where the solutions of the integrable dynamical equations develop finite-time singularities. Based on this observation, an analytical criterion for the existence and locations of fractal structures is obtained. Lastly, these analytical results are applied to the generalized nonlinear Schrödinger equations with various nonlinearities such as the saturable nonlinearity, and predictions on their weak interactions of solitary waves are made.
description: 22pages, 15 figures
Switching Dynamics in Reaction Networks Induced by Molecular Discreteness
Creators: name: Togashi, Yuichi
name: Kaneko, Kunihiko
Publisher: name: arXiv
Year: 2006
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Biological Physics (physics.bio-ph)
subject: Molecular Networks (q-bio.MN)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: To study the fluctuations and dynamics in chemical reaction processes, stochastic differential equations based on the rate equation involving chemical concentrations are often adopted. When the number of molecules is very small, however, the discreteness in the number of molecules cannot be neglected since the number of molecules must be an integer. This discreteness can be important in biochemical reactions, where the total number of molecules is not significantly larger than the number of chemical species. To elucidate the effects of such discreteness, we study autocatalytic reaction systems comprising several chemical species through stochastic particle simulations. The generation of novel states is observed; it is caused by the extinction of some molecular species due to the discreteness in their number. We demonstrate that the reaction dynamics are switched by a single molecule, which leads to the reconstruction of the acting network structure. We also show the strong dependence of the chemical concentrations on the system size, which is caused by transitions to discreteness-induced novel states.
description: 11 pages, 5 figures
Διερεύνηση της μηχανικής συμπεριφοράς συγκολλητών διατομών αλουμινίου με υπολογιστικές μεθόδους
Creators: name: Πρεφτίτση, Φωτεινή Γ.
Publisher: name: Aristotle University of Thessaloniki
Year: 2005
Subjects: Συγκόλληση
Ζώνη επιρροής θερμότητας
Weld
Heat affected zone

description: Η εργασία αφορά στην διερεύνηση της επίδρασης της απομείωσης της μηχανικής αντοχής συγκολλητών διατομών αλουμινίου λόγω της θερμικής επιρροής των συγκολλήσεων στην μορφή αστοχίας τους. Η διερεύνηση πραγματοποιήθηκε μέσω ανάλυσης πεπερασμένων στοιχείων λαμβάνοντας υπ'οψιν την μη γραμμικότητα του υλικού, όχι όμως και την γεωμετρική μη γραμμικότητα. Λόγω της έλλειψης τυποποιημένων σειρών διατομών αλουμινίου, αρχικά προτάθηκε μέθοδος για την τυποποίηση των διαστάσεων των διατομών αλουμινίου. Εν συνεχεία, πραγματοποιήθηκαν αναλύσεις που βασίζονται σε μοντέλο κέλυφους δοκού διπλού Τ με ανανέωση του εφαπτομενικού μητρώου δυσκαμψίας, μετά το πέρας έκαστου φορτιστικού βήματος. Τα αποτελέσματα των αναλύσεων έδειξαν πρώϊμη αστοχία των συγκολλητών διατομών λόγω της αλληλεπίδρασης κάμψης-τέμνουσας που σε συνδυασμό με την απομείωση των μηχανικών αντοχών προκαλεί απώλεια της επιπεδότητας των συγκολλητών διατομών σε επίπεδα φορτίου όπου οι αντίστοιχες διατομές χωρίς συγκόλληση συμπεριφέρονται σύμφωνα με την παραδοχή Bernoulli
description: The present aspects of the behaviour of welded aluminium double-T beams. The investigation was conducted by means of a finite shell element model, taking into account material nonlinearity geometrical nonlinearity was neglected. An important problem concerning the use of aluminium sections in structural applications. Is the lack in standard aluminium profile series. Initialy, a method for generati of alluminium profile series is proposed. Additionally, an unwanted but nevertheless unavoidable side effect of the welding process in aluminium is the creation of the so-called heat affected zone the alteration of the material behaviour due to the hAZ is indroduced at a gauss-point level. The result of the analysis show early failure of the welded beam due to the accumulation of shear deformation in the boundary between the HAZ and the unaffected material in the areas of high bending and shear
Kyphosidae
Creators: name: Golani, Daniel
name: Fricke, Ronald
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Actinopterygii
Perciformes
Kyphosidae

description: KYPHOSIDAE   Kyphosus bigibbus Lacepède 1801
 Gulf of Suez: Egypt (Rüppell 1836, as Pimelepterus fuscus; El-Ganainy et al 2005).
 Gulf of Aqaba: ¯
 Red Sea main basin: Egypt (Martens 1867, as Pimelepterus fuscus), Sudan (Fowler 1931), Saudi Arabia (Tortonese 1983).
 General distribution: Atlantic Ocean; Red Sea, Indo-West Pacific: East Africa east to southern Japan, Indonesia and northern New Zealand.
 Kyphosus cinerascens (Forsskål in Niebuhr 1775)
 Gulf of Suez: Egypt (El-Ganainy et al 2005).
 Gulf of Aqaba: ¯
 Red Sea main basin: Egypt (Klunzinger 1870, as Pimelepterus tahmel), Sudan (Fowler 1931), Eritrea (Picaglia 1895, as Pimelepterus tahmel), Saudi Arabia (Rüppell 1836, as Pimelepterus tahmel).
 General distribution: South Atlantic; Red Sea, Indo-West Pacific: East Africa east to Hawaiian Islands and Line islands and Easter Island.
 Kyphosus vaigiensis (Quoy & Giamard 1825)
 Gulf of Suez: ¯
 Gulf of Aqaba: Jordan (Khalaf & Disi 1997).
 Red Sea main basin: Egypt (Botros 1971, as Pimelepterus waigiensis), Saudi Arabia (Rüppell 1836, as Pimelepterus marciac).
 General distribution: Red Sea, Indo-West Pacific: East Africa east to Hawaiian, Line and Marquesas islands.
description: Published as part of Golani, Daniel & Fricke, Ronald, 2018, Checklist of the Red Sea Fishes with delineation of the Gulf of Suez, Gulf of Aqaba, endemism and Lessepsian migrants, pp. 1-215 in Zootaxa 4509 (1) on pages 106-107, DOI: 10.11646/zootaxa.4509.1.1, http://zenodo.org/record/2607566
Τα αίτια της λειψυδρίας και της πλημμυρογένεσης στα νησιά του Βορειοανατολικού Αιγαίου(Ν. Λέσβου, Ν. Χίου, Ν. Σάμου)
Creators: name: Κρητικού, Ζαϊρα-Αικατερίνη
Publisher: name: Aristotle University of Thessaloniki
Year: 2005
Subjects: Χαρτογραφική απεικόνιση λεκανών απορροής
Χειμαρρικό περιβάλλον
Map representation of runoff basins
Torrential environment

description: Σκοποί : η χαρτογραφική απεικόνιση των λεκανών απορροής των νησιών της περιοχής έρευνας, ο προσδιορισμός των βασικών χειμαρρικών παραγόντων, ο καθορισμός του χειμαρρικού περιβάλλοντος, η ανάλυση των φαινομένων της λειψυδρίας και της πλημμυρογένεσης και η διερεύνηση των αιτιών των φαινομένων αυτών. Μεθοδος έρευνας : εγινε χαρτογραφική απικόνιση των λεκανών απορροής και των χειμαρικών ρευμάτων, προσδιορίστηκαν τα μορφομετρικά και υδρογραφικά χαρακτηριστικά τους, δημιουργήθηκαν χάρτες και προσδιορίστηκαν οι μέγιστες αναμενόμενες παροχές(υδατοπαροχή-στερεοπαροχή) και η υποβάθμιση. Αναζητήθηκαν τα έργα αντιπλημμυρικής προστασίας και αξιοποίησης του υδατικού δυναμικού και οι τρόποι κάλυψης των υδρευτικών και αρδευτικών αναγκών. Συμπεράσματα : τα αίτια της λειψυδρίας είναι η υπερεκμετάλλευση των υπόγειων υδροφορέων, η αποδάσωση και η δομή των πετρολογικών σχηματισμών, ο σύγχρονος τρόπος ζωής με τις συνεχώς αυξανόμενες απαιτήσεις σε νερό, η ανομοιόμορφη κατανομλη των κατακρημνισμάτων και η μεγάλη ξηροθερμική περίοδος. Τα αίτια της πλημμυρογένεσης είναι το μικρό ποσοστό δασοκάλυψης, οι ευπαθείς χειμαρρικοί σχηματισμοί, το έντονο ανάγλυφο, η μη εφαρμογή του δασοτεχνικού συστήματος διευθέτησης, οι διάφορες ανθρωπογενείς επεμβάσεις στις κοίτες των ρευμάτων, και οι αυξημένες τιμές υδατοπαροχών και στερεοπαροχών
description: Aims : the map representation of the runoff basins of the research area islands, the definition of the basic torrential factors, the definition of the torrential environment, the analysis of water-shortage and flood-creation phenomena and the investigation of the causes of the above phenomena for the research area. Method : the runoff basins were represented in maps and their morphometric and hydrographic characteristics were defined, the maps for vegetation, relief and vegetation were formed and the basic torrential factors were defined. The maximum protection water-and sediment discharge were estimeted. The flood protection and water exploitation works that exist in the above islands and the ways of covering water needs were recorded. Conclusions : causes of water shortage : the extreme explotation of underground water, deforestation, the structure of geological formation, the modern way of life, the unequal distribution of precipation. Causes of flood creation : deforestation, geological formation, steep relief, the delay in applying the forest correction system, the interventions in the streambeds, the high values of the prospective discharges
Η επίδραση κοινωνικο-γνωστικών λειτουργών στην υποκειμενική ερμηνεία ηθικών διαστάσεων της ψυχοθεραπείας
Creators: name: Βασιλειάδης, Γρηγόρης
Publisher: name: Aristotle University of Thessaloniki
Year: 2005
Subjects: Ηθική κρίση
Ψυχολόγοι
Συμβουλευτική
Moral counseling
Counseling
Psychologists

description: Με την παρούσα διδακτορική ερευνητική διατριβή επιχειρήθηκε η εκτίμηση του επιπέδου ηθικής κρίσης των Ελλήνων επαγγελματικών ψυχολόγων, του τρόπου με τον οποίο λαμβάνουν κλινικές αποφάσεις στην πρακτική της ψυχοθεραπείας και μελετήθηκε η αλληλεπίδραση των παραπάνω μεταβλητών. 550 επαγγελματίες ψυχολόγοι κλήθηκαν να απαντήσουν σ'ενα διεθνώς σταθμισμένο ερωτηματολόγιο που αξιολογεί το επίπεδο της ηθικής τους κρίσης(DIT), και σε 10 υποθετικά διλήμματα επαγγελματικής δεοντολογίας και πρακτικής στην ψυχοθεραπεία, επιλέγοντας την υποκειμενικά ορθότερη κλινική απόφαση για το καθένα απ΄αυτά, καθώς το σημαντικότερο λόγο που τη στηρίζει. Τα αποτελέσματα της διατριβής δείχνουν ότι : α)οι επαγγελματίες ψυχολόγοι έχουν υψηλή ηθική κρίση, β)δυσκολεύονται να συμφωνήσουν σε κρίσιμα επαγγελματικά ζητήματα, ο χειρισμός των οποίων απαιτεί η διεθεύτηση συγκρουόμενων οπτικών και γ)το υψηλότερο επίπεδο ηθικής κρίσης των ψυχολόγων συνδέεται θετικά με την ικανότητά τους να ενσωματώνουν πολλές οπτικές γωνίες στην αντιμετώπιση ενός προβλήματος και να λαμβάνουν περισσότερο υπόψιν τους τα δικαιώματα και τις διαφορετικές προοπτικές των εμπλεκόμενων πλευρών και τις βασικές ηθικές αξίες της ψυχοθεραπείας, απ'τις οποίες απορρέει ο σεβασμός στα παραπάνω δικαιώματα
description: The present doctoral research dissertation attempts to assess the level of the moral reasoning of the professional phychologists in Greece and Cyprus, and to investigate how they make clinical decisions in psychotherapy practice. The interactions between the above-mentioned variable were also examined. 550 professional psychologists were asked to respond to a world wide standardized questionnaire(D.I.T) aiming to evaluate the moral reasoning process, and 10 vignettes regarding professional ethics of psychotherapy, by choosing the subjectively correct answer to each of them. The results of the dissertation indicate that the professional psychologists are characterized by considerably high level of moral reasoning and that they can hardly agree on critical professional issues, the management of which calls for the integration of ethically conflictual perspectives. Besides, the research findings clearly support that the highest level of psychologists' moral reasoning processes is positively related to their capacity in integrating different perspectives in clinical decision making creatively taking seriously the clients' and third parties' rights into consideration
Reply to "Can gravitational dynamics be obtained by diffeomorphism invariance of action?"
Creators: name: Sotiriou, Thomas P.
name: Liberati, Stefano
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In a previous work we showed that, in a suitable setting, one can use diffeomorphism invariance in order to derive gravitational field equations from boundary terms of the gravitational action. Standing by our results we reply here to a recent comment questioning their validity.
description: Accepted for publication in PRD
Multi-field, multi-frequency bosonic stars and a stabilization mechanism
Creators: name: Sanchis-Gual, Nicolas
name: Di Giovanni, Fabrizio
name: Herdeiro, Carlos
name: Radu, Eugen
name: Font, José A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Scalar bosonic stars (BSs) stand out as a multi-purpose model of exotic compact objects. We enlarge the landscape of such (asymptotically flat, stationary, everywhere regular) objects by considering multiple fields (possibly) with different frequencies. This allows for new morphologies ${\it and}$ a stabilization mechanism for different sorts of unstable BSs. First, any odd number of complex fields, yields a continuous family of BSs departing from the spherical, equal frequency, $\ell-$BSs. As the simplest illustration, we construct the $\ell$ = ${\it 1}$ ${\it BSs}$ ${\it family}$, that includes several single frequency solutions, including even parity (such as spinning BSs and a toroidal, static BS) and odd parity (a dipole BS) limits. Second, these limiting solutions are dynamically unstable, but can be stabilized by a ${\it hybrid}$-$\ell$ construction: adding a sufficiently large fundamental $\ell=0$ BS of another field, with a different frequency. Evidence for this dynamical robustness is obtained by non-linear numerical simulations of the corresponding Einstein-(complex, massive) Klein-Gordon system, both in formation and evolution scenarios, and a suggestive correlation between stability and energy distribution is observed. Similarities and differences with vector BSs are anticipated.
description: 8 pages, 8 figures. Revised version, more references
The Sivers single-spin asymmetry in photon-jet production
Creators: name: Bacchetta, Alessandro
name: Bomhof, Cedran
name: D'Alesio, Umberto
name: Mulders, P. J.
name: Murgia, F.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study a weighted asymmetry in the azimuthal distribution of photon-jet pairs produced in the process p^\uparrow p --> γjet X with a transversely polarized proton. We focus on the contribution of the Sivers effect only, considering experimental configurations accessible at RHIC-BNL. We show that predictions for the asymmetry, obtained in terms of gluonic-pole cross sections calculable in perturbative QCD, can be tested and clearly discriminated from those based on a generalized parton model, involving standard partonic cross sections. Experimental measurements of the asymmetry will therefore test our present understanding of single-spin asymmetries.
description: Some changes in the text and in the layout. Two references added. Accepted for publication in PRL
[Elicitation session in pairs]
Creators: name: Palacio, Philip Tim
name: Cibelli, Emily
name: Sheil, Christine
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2020
Subjects: subject: cab

description: 3 WAV, 3 TextGrid, and 3 TXT files.
Middle voice verb elicitation (esc_cms_01).
Work on complement clauses in sentences where the matrix verb can take either a NP/pronoun or CP complement (cms_esc_02).
Personal impassives (esc_cms_03).
Vancouver service exports to the Asia Pacific and the role of local government in their promotion
Creators: name: Tate, Laura Ellen
Publisher: name: University of British Columbia
Year: 2011

description: This thesis looks at the feasibility of promoting knowledge intensive service (KIS) exports to Asia as part of a local economic development strategy. To this end a two part study was conducted, consisting of a postal survey and a series of elite interviews. The study demonstrates that many Vancouver KIS firms have already established a presence in Pacific Rim markets; furthermore, future growth in these markets is likely. The study examines various characteristics of KIS exporters to Asia so as to enable policy makers to draft appropriate recommendations. The remainder of the thesis outlines current initiatives at senior and local levels of government. A case is made for increasing the scope of local government action in this sphere, and some potential initiatives are suggested.
Μελέτη διφασικής αντιρροής σε κατακόρυφο κανάλι με μικρό διάκενο
Creators: name: Δρόσος, Ευάγγελος Ι.
Publisher: name: Aristotle University of Thessaloniki
Year: 2005
Subjects: Στενό ορθογωνικό κανάλι
Διατμητική τάση υγρού-τοιχώματος
Μικροί αριθμοί Reynolds υγρού
Narrow rectancular channel
Wall shear stress
Low liquid Reynolds numbers

description: Στη διατριβή μελετώνται βασικά ρευστοδυναμικά χαρακτηριστικά της υγρής στιβάδας σε συνθήκες αντιρροής με αέρα, σε κατακόρυφο κανάλι ορθογωνικής διατορής, μικρού διακένου(1cm) και σχετικά μικρού μήκους(38cm). Στα πειράματα χρησιμοποιήθηκε ατμοσφαιρικός αέρας και νερό δυο υδατικά διαλύματα βουτανό Ans 1,5% και 2,5%κ.β. και ένα ηλεκτροχημικό διάλυμα. Οι μετρήσεις πραγματοποιήθηκαν σε μικρούς αριθμούς Reynolds υγρού(<350) για τους οποίους η ροή του υγρού είναι υπό διαμόρφωση. Η εργασία περιλαμβάνει ψηφιακή καταγραφή της ροής σε διάφορες θέσεις του καναλιού, ενώ μετρώνται επίσης το πάχος της υγρής στιβάδας με μια αγωγιμομετρική τεχνική και η διατμητική τάση υγρού-τοιχώματος με τη μέθοδο της ηλεκτροδιάχυσης. Τα πειραματικά δεδομένα δείχνου ότι, για την ελευθέρως ρέουσα στιβάδα-της οποίας τα χαρακτηριστικά προκαθορίζουν την εξέλιξη της αντιρροής των δυο φάσεων-με αύξηση της απόστασης από την είσοδο του υγρού μειώνεται η κύρια συχνότητα των κυμάτων διαταραχής, όπως επίσης και με αύξηση της παροχής αέρα(σε συνθήκες αντιρροής). Σε συνθήκες αντιρροής επίσης, παρατηρείται αύξηση του μέσου πάχους στιβάδας που σχετίζεται με την παράλληλη μείωση της διατμητικής τάσης, ενώ η έναρξη της πλημμύρισης συμβαίνει στο κάτω τμήμα
description: The purpose of this work is to study adiabatic gas-liquid counter-current flow, focusing also on the onset of flooding, in a vertical rectangular channel at distances relatively close to the liquid entry. The gap of the channel is 10mm and the active length of the test section is 38cm. Experiments were carried out with air and three liquids(i.e. water, 1,5%w/w and 2,5%w/w n-butanol volutions), plus an electrochemical solution, at intermediate liquid Reynolds numbers(<350). Film thickness measurements were made using a conductivity method and liquid-to-wall shear stress was also measured using an electrochemical technique. The new data show that the flow development of the free falling film, on which gas shearing is applied, influences the resulting two-phase flow pattern. By increasing gas flow rate, a sharp increase of mean film thickness is observed, while liquid-to-wall shear stress decreases. Flooding is observed at the lower hall of the channel
The Determination of alpha_s from Tau Decays Revisited
Creators: name: Davier, M.
name: Descotes-Genon, S.
name: Hocker, A.
name: Malaescu, B.
name: Zhang, Z.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We revisit the determination of alpha_s(m_tau) using a fit to inclusive tau hadronic spectral moments in light of (1) the recent calculation of the fourth-order perturbative coefficient K_4 in the expansion of the Adler function, (2) new precision measurements from BABAR of e+e- annihilation cross sections, which decrease the uncertainty in the separation of vector and axial-vector spectral functions, and (3) improved results from BABAR and Belle on tau branching fractions involving kaons. We estimate that the fourth-order perturbative prediction reduces the theoretical uncertainty, introduced by the truncation of the series, by 20% with respect to earlier determinations. We discuss to some detail the perturbative prediction and show that the effect of the incomplete knowledge of the series is reduced by using the so-called contour-improved calculation, as opposed to fixed-order perturbation theory which manifests convergence problems. The corresponding theoretical uncertainties are studied at the tau and Z mass scales. Nonperturbative contributions extracted from the most inclusive fit are small, in agreement with earlier determinations. Systematic effects from quark-hadron duality violation are estimated with simple models and found to be within the quoted systematic errors. The fit gives alpha_s(m_tau) = 0.344 +- 0.005 +- 0.007, where the first error is experimental and the second theoretical. After evolution to M_Z we obtain alpha_s(M_Z) = 0.1212 +- 0.0005 +- 0.0008 +- 0.0005, where the errors are respectively experimental, theoretical and due to the evolution. The result is in agreement with the corresponding NNNLO value derived from essentially the Z width in the global electroweak fit. The alpha_s(M_Z) determination from tau decays is the most precise one to date.
description: 22 pages, 7 figures
Macroscopically degenerate localized zero-energy states of quasicrystalline bilayer systems in strong coupling limit
Creators: name: Ha, Hyunsoo
name: Yang, Bohm-Jung
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: When two identical two-dimensional (2D) periodic lattices are stacked in parallel after rotating one layer by a certain angle relative to the other layer, the resulting bilayer system can lose lattice periodicity completely and become a 2D quasicrystal. Twisted bilayer graphene with 30-degree rotation is a representative example. We show that such quasicrystalline bilayer systems generally develop macroscopically degenerate localized zero-energy states (ZESs) in strong coupling limit where the interlayer couplings are overwhelmingly larger than the intralayer couplings. The emergent chiral symmetry in strong coupling limit and aperiodicity of bilayer quasicrystals guarantee the existence of the ZESs. The macroscopically degenerate ZESs are analogous to the flat bands of periodic systems, in that both are composed of localized eigenstates, which give divergent density of states. For monolayers, we consider the triangular, square, and honeycomb lattices, comprised of homogenous tiling of three possible planar regular polygons: the equilateral triangle, square, and regular hexagon. We construct a compact theoretical framework, which we call the quasiband model, that describes the low energy properties of bilayer quasicrystals and counts the number of ZESs using a subset of Bloch states of monolayers. We also propose a simple geometric scheme in real space which can show the spatial localization of ZESs and count their number. Our work clearly demonstrates that bilayer quasicrystals in strong coupling limit are an ideal playground to study the intriguing interplay of flat band physics and the aperiodicity of quasicrystals.
description: 5 pages, 4 figures + Supplementary Material (12 pages,5 figures)
Thermodynamic origin of the peak effect in the superconductor Nb3Sn
Creators: name: Lortz, R.
name: Musolino, N.
name: Wang, Y.
name: Junod, A.
name: Toyota, N.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We report a pronounced peak effect in the magnetization and the magnetocaloric coefficient in a single crystal of the superconductor Nb3Sn. As the origin of the magnetization peak effect in classical type-II superconductors is still strongly debated, we performed an investigation of its underlying thermodynamics. Calorimetric experiments performed during field sweeps at constant temperatures reveal that the sharp increase in the current density occurs concurrently with additional degrees of freedom in the specific heat due to thermal fluctuations and a liquid vortex phase. No latent heat due to a direct first-order melting of a Bragg glass phase into the liquid phase is found which we take as evidence for an intermediate glass phase with enhanced flux pinning. The Bragg glass phase can however be restored by a small AC field. In this case a first-order vortex melting transition with a clear hysteresis is found. In the absence of an AC field the intermediate glass phase is located within the field range of this hysteresis. This indicates that the peak effect is associated with the metastability of an underlying first-order vortex melting transition.
A multiband envelope function model for quantum transport in a tunneling diode
Creators: name: Morandi, Omar
name: Modugno, Michele
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We present a simple model for electron transport in semiconductor devices that exhibit tunneling between the conduction and valence bands. The model is derived within the usual Bloch-Wannier formalism by a k-expansion, and is formulated in terms of a set of coupled equations for the electron envelope functions. Its connection with other models present in literature is discussed. As an application we consider the case of a Resonant Interband Tunneling Diode, demonstrating the ability of the model to reproduce the expected behaviour of the current as a function of the applied voltage
description: 8 pages, 4 figures
Tuning Phononic and Electronic Contributions of Thermoelectric in defected S-Shape Graphene Nanoribbons
Creators: name: Bazrafshan, M. Amir
name: Khoeini, Farhad
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: Thermoelectrics as a way to use waste heat, is essential in electronic industries, but its low performance at operational temperatures makes it inappropriate in practical applications. Tailoring graphene can change its properties. In this work, we are interested in studying the transport properties of S-shape graphene structures with the single vacancy (SV) and double vacancy (DV) models. The structures are composed of a chiral part, which is an armchair graphene nanoribbon, and two zigzag graphene ribbons. We investigate the changes in the figure of merit by means of the Seebeck coefficient, electronic conductance, and electronic and phononic conductances with the vacancies in different device sizes. The transport properties of the system are studied by using the non-equilibrium Greens function method, so that the related Hamiltonians (dynamical matrices) are obtained from the tight-binding (force constant) model. The maximum figure of merit (ZT) obtains for the DVs in all lengths. Physical properties of such a system can be tuned by controlling various parameters such as the location and the type of the defects, and the device size. Our findings show that lengthening the structure can reduce phononic contribution, and single vacancies than double vacancies can better distinguish between electronic thermal conductance behavior and electronic conductance one. Namely, vacancy engineering can significantly increase thermoelectric performance. In the large devices, the SVs can increase the ZT up to 2.5 times.
description: 26 pages
Ψηφιακή επεξεργασία σημάτων: εφαρμογή σε γεωφυσικά δεδομένα
Creators: name: Σαραγιώτης, Χρήστος Δ.
Publisher: name: Aristotle University of Thessaloniki
Year: 2005
Subjects: Σεισμική φάση
Αντιεντροπία
Λοξότητα, κύρτωση
Seismic phase
Vegentropy
Skewness, kurtosis

description: Η διατριβή πραγματεύεται το πρόβλημα του αυτόματου προσδιορισμού των χρόνων άφιξης των σεισμικών φάσεων P και S, ταχύς και ακριβής προσδιορισμός των οποίων είναι μεγάλης σημασίας για τους σεισμολόγους. Για το σκοπό αυτό γίνεται οι εξής υποθέσεις α)ο θόρυβος των σεισμικών καταγραφών ακολουθεί κανονική ή τουλάχιστον κάποια μη-συμμετρική κατανομή και β)υπάρχει ένα χρονικό παράθυρο στο οποίο περιλαμβάνεται η έναρξη σεισμικών φάσεων στο οποίο η σεισμική καταγραφή δεν ακολουθεί κανονική κατανομή. Με βάση τις παραπάνω υποθέσεις το πρόβλημα ανάγεται στον εντοπισμό της μεταβολής της στασιμότητας στις καταγραφές. Ετσι, χρησιμοποιούνται τέσσερις μέθοδοι, οι οποίες βασίζονται στη Στατιστική Ανώτερης Τάξης(HOS), την κ-Στατιστική, το Μετασχηματισμό Κυματιδίων σε συνδυασμό με Στατιστική Ανώτερης Τάξης και τέλος ένα πληροφοριοθεωρητικό κριτήριο της αντιεντροπίας, αντίστοιχα. Οι μέθοδοι αυτές εφαρμόζονται σε πραγματικά δεδομένα και γίνεται σύγκριση με τη μέθοδο της περιβάλλουσας του Allen, που είναι και η ευρύτερα εφαρμοζόμενη μέθοδος σήμερα
description: This thesis deals with the problem of the automatic determination of the P and S seismic phases arrivals, the fast and accurate determination of which of great importance for seismologists. To this end the following two hypothesis are made : a)the noise of seismic records follows gaussian distribution or at least some unknown nonsymmetrical distribution and b)there exists a time window, which includes the seismic phase arrival, which does not follow gaussian or symmetrical distribution. Based on the aforementioned assumptions the problem is transformed into determining the departure from stationarity on seismic records. Four methods are employed which are based on Higher-Order Statistics, k-Statistics, the Wavelet Transform and Higher Order Statistics and an information-theoretic criterion based on negentropy. Those methods are applied on rela seismic data and the results are compared with Allen's method, which the most widely used method nowadays
Range-Visual-Inertial Odometry: Scale Observability Without Excitation
Creators: name: Delaune, Jeff
name: Bayard, David S.
name: Brockers, Roland
Publisher: name: arXiv
Year: 2021
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: Traveling at constant velocity is the most efficient trajectory for most robotics applications. Unfortunately without accelerometer excitation, monocular Visual-Inertial Odometry (VIO) cannot observe scale and suffers severe error drift. This was the main motivation for incorporating a 1D laser range finder in the navigation system for NASA's Ingenuity Mars Helicopter. However, Ingenuity's simplified approach was limited to flat terrains. The current paper introduces a novel range measurement update model based on using facet constraints. The resulting range-VIO approach is no longer limited to flat scenes, but extends to any arbitrary structure for generic robotic applications. An important theoretical result shows that scale is no longer in the right nullspace of the observability matrix for zero or constant acceleration motion. In practical terms, this means that scale becomes observable under constant-velocity motion, which enables simple and robust autonomous operations over arbitrary terrain. Due to the small range finder footprint, range-VIO retains the minimal size, weight, and power attributes of VIO, with similar runtime. The benefits are evaluated on real flight data representative of common aerial robotics scenarios. Robustness is demonstrated using indoor stress data and fullstate ground truth. We release our software framework, called xVIO, as open source.