cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Protein kinase regulation of sarcoplasmic reticulum function in isolated adult rat ventricular myocytes
Creators: name: Wientzek, Monika
Publisher: name: University of British Columbia
Year: 2009

description: The sarcoplasmic reticulum (SR) is one of the major regulators of the cytosolic Ca2+ concentration in cardiac ventricular muscle cells. In the myocardium, relaxation results from a decrease in cytoplasmic free Ca2+ levels mediated through an efflux of Ca2+ from the cell via the sarcolemmal Na+/Ca2+- exchanger and by the sequestration of 0a2+ by the network SR membranes through the actions of a calcium pump (a Mg2+dependent, Ca2+/K+activated adenosine triphosphatase; Ca2+/K+-ATPase). During an action potential, the Ca2+ stored in the SR is released to the cytoplasm via a Ca2+release channel present in the junctional SR and Ca2+ also enters the cell through voltage-controlled Ca2+ channels in the sarcolemmal membrane. These two processes result in an increase in cytoplasmic Ca2+ concentration which leads to contraction of the myocardium. SR membrane function is regulated in part by the phosphorylation of proteins present in this membrane. Subsequent to 3-adrenergic stimulation of the heart by catecholamines, levels of cAMP are increased leading to the activation of cAMP-dependent protein kinase (PK A). In isolated cardiac SR membrane vesicles and perfused hearts, phosphorylation of an indigenous SR protein, phospholamban, is mediated by PK A. Phosphorylated phospholamban acts as a modulator of the Ca2+/K+-ATPase to stimulate active Ca2+ uptake by increasing the affinity of this enzyme for Ca2+. This stimulation of Ca2+-uptake is the main mechanism by which catecholamines accelerate relaxation in the heart. When phospholamban is in the dephosphorylated state, a cytoplasmic portion of the molecule interacts near the phosphorylation site of the Ca2+-pump to inhibit Ca2+-transport. [More abstract follows]
The Vehicle Routing Problem: the Case of a Frozen Pastry Products Company
Creators: name: Κοντοσφύρη, Βικτωρία Παναγιώτη
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: Πρόβλημα Δρομολόγησης Οχημάτων
Πρόβλημα Δρομολόγησης Οχημάτων με Περιορισμό Χωρητικότητας
Αλγόριθμος Clarke and Wright
Vehicle Routing Problem
Capacitated Vehicle Routing Problem
Clarke and Wright algorithm

description: Due to the globalization and the ever-increasing demands of the customers, the improvement of the supply chain constitutes a key factor for the competitiveness and the sustainability of each company. This dissertation deals with one of the most crucial problems of the supply chain management, the Capacitated Vehicle Routing Problem (CVRP) and an attempt is made in order to study, analyze and solve it. The main purpose of this thesis is to propose feasible and near-optimal solutions for the routing of a fleet of vehicles for daily deliveries of a company X, combining real data with algorithms. The Capacitated Vehicle Routing Problem is an interesting and demanding problem. It concerns the essential integration and coordination of the two basic operations of the supply chain, the distribution process and the inventory management. More specifically, the first part of this thesis consists of the literature review and a reference is made in the basic concepts of the VRP, its variations and the solution methods. The second part includes the practical application of the aforementioned problem in the company X and the solution of the Clarke and Wright algorithm is presented, thus the near-optimal solution is provided
description: Λόγω της παγκοσμιοποίησης και των συνεχώς αυξανόμενων απαιτήσεων των πελατών, η βελτίωση της εφοδιαστικής αλυσίδας αποτελεί βασικό παράγοντα για την ανταγωνιστικότητα και τη βιωσιμότητα μιας εταιρίας. Η συγκεκριμένη διπλωματική εργασία ασχολείται με ένα από τα πιο κρίσιμα προβλήματα της διαχείρισης αλυσίδας εφοδιασμού, το πρόβλημα της δρομολόγησης οχημάτων και γίνεται η προσπάθεια μελέτης, ανάλυσης και επίλυσης του. Ο βασικός σκοπός αυτής της διπλωματικής εργασίας είναι να προτείνει εφικτές και σχεδόν βέλτιστες λύσεις για τη δρομολόγηση ενός στόλου οχημάτων για τις καθημερινές παραδόσεις μιας εταιρίας X συνδυάζοντας τα πραγματικά δεδομένα της εταιρίας με τους κατάλληλους αλγόριθμους. Το πρόβλημα δρομολόγησης οχημάτων με περιορισμό χωρητικότητας είναι ένα ενδιαφέρον και απαιτητικό πρόβλημα. Αφορά την ουσιαστική ολοκλήρωση και τον συντονισμό δύο βασικών λειτουργιών της εφοδιαστικής αλυσίδας, της διαδικασίας διανομής και της διαχείρισης αποθεμάτων. Πιο συγκεκριμένα, το πρώτο μέρος αυτής της διπλωματικής εργασίας αποτελείται από την βιβλιογραφική επισκόπηση και γίνεται αναφορά στις βασικές έννοιες του προβλήματος δρομολόγησης, τις παραλλαγές του και τις μεθόδους επίλυσης του. Το δεύτερο μέρος περιλαμβάνει την πρακτική εφαρμογή του προαναφερθέντος προβλήματος στην εταιρία Χ και παρουσιάζεται η λύση του αλγορίθμου Clarke and Wright
JAMOAT TRANSPORTI QATNOV JARAYONINI PTV VISSIM DASTURIDA MODELLASHTIRISH
Creators: name: Boboxonov, Mashxurbek
Publisher: name: Zenodo
Year: 2024

description: Shaharlarning transport tizimlari murakkab va ko‘p qatlamli jarayonlardan iborat bo‘lib, ularni samarali boshqarish va optimallashtirish muhimdir. Jamoat transporti shahar hayotida katta o‘rin tutadi, u orqali fuqarolar ishga, uyga va boshqa muhim joylarga harakatlanadilar. Transport tizimini optimallashtirish orqali tirbandliklar oldini olish, energiyani tejash va vaqtni samarali boshqarish kabi maqsadlarga erishish mumkin. Shu nuqtai nazardan, jamoat transporti tizimini mikroskopik simulyatsiya qilish transport rejalashtirish jarayonlarida muhim qadam sanaladi. PTV VISSIM – shahar infratuzilmasidagi transport vositalarining harakatini modellashtirishga mo‘ljallangan ilg‘or dastur bo‘lib, bu jarayonlarni aniq tahlil qilish imkonini beradi. Ushbu tadqiqot PTV VISSIM dasturida jamoat transporti qatnovini qanday modellashtirish mumkinligini va bu modellashtirishning afzalliklarini ko‘rib chiqadi.
Analysis of angular distributions in gamma N \to pi0 eta N
Creators: name: Fix, A.
name: Ostrick, M.
name: Tiator, L.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Angular distributions in the final state of pi0-eta photoproduction on nucleons are considered. As a formal base the familiar isobar model is used in which the (pi0 eta N) state is a product of the resonance decay into eta-Delta(1232) and pi-S_{11}(1535) channels. One of the principal assumptions used is that in the actual energy region the reaction is dominated by a single resonance state. The developed formalism can serve as a tool for testing spin and parity of that resonance.
description: 16 pages, 8 figures, accepted for publication in EPJA
Comment on "Fluctuations in Extractable Work Bound the Charging Power of Quantum Batteries"
Creators: name: Cusumano, Stefano
name: Rudnicki, Łukasz
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In the abstract of~[Phys. Rev. Lett. {\bf 125}, 040601 (2020)] one can read that: [...]{\it to have a nonzero rate of change of the extractable work, the state $ρ_\mathcal{W}$ of the battery cannot be an eigenstate of a "free energy operator", defined by $\mathcal{F}=H_\mathcal{W}+β^{-1}\log ρ_\mathcal{W}$, where $H_\mathcal{W}$ is the Hamiltonian of the battery and $β$ is the inverse temperature} [...]. Contrarily to what is presented below Eq.~(17) of the paper, we observe that the above conclusion does not hold when the battery is subject to nonunitary dynamics.
description: 1 page, submitted to the journal the 23rd of December 2020
Determination of the neutrino mass hierarchy in the regime of small matter effect
Creators: name: Schwetz, Thomas
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: We point out a synergy between T-conjugated oscillation channels in the determination of the neutrino mass hierarchy with oscillation experiments with relatively short baselines (L < 700 km), where the matter effect is small. If information from all four oscillation channels $ν_μ\toν_e$, $\barν_μ\to\barν_e$, $ν_e\toν_μ$ and $\barν_e\to\barν_μ$ is available, a matter effect of few percent suffices to break the sign-degeneracy and allows to determine the neutrino mass hierarchy. The effect is discussed by analytical considerations of the relevant oscillation probabilities, and illustrated with numerical simulations of realistic experimental setups. Possible configurations where this method could be applied are the combination of a super beam experiment with a beta beam or a neutrino factory, or a (low energy) neutrino factory using a detector with muon and electron charge identification.
description: 13 pages, 3 figures
Ο αξιακός άξονας του ομοφυλόφιλου στον Pier Vittorio Tondelli υπό το πρίσμα των “Ετεροτοπιών” του Michel Foucault: Μελέτη πάνω στα έργα Altri Libertini και Camere Separate
Creators: name: Χρυσάφη-Βακλαβά, Μαρία
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: Τοντέλι
Ομοφυλοφιλία
Ιταλική Λογοτεχνία
Tondelli
Homosexuality
Italian Literature

description: Ο εντοπισμός και η καταγραφή του αξιακού κώδικα του ομοφυλόφιλου χαρακτήρα δύο βιβλίων του Ιταλού συγγραφέα Pier Vittorio Tondelli αποτελούν το θέμα της παρούσας εργασίας. Η έρευνα πραγματοποιήθηκε στα έργα του συγγραφέα, Altri Libertini και Camere Separate υπό το πρίσμα των «Ετεροτοπιών» του Michel Foucault. Αρχικά στην εργασία πραγματοποιείται μια παρουσίαση του διαχωρισμού Gender – Sex (κοινωνικό φύλο – βιολογικό φύλο), μια ιστορική αναδρομή πάνω στο θέμα της σεξουαλικότητας και της ομοφυλοφιλίας και μια σύντομη παρουσίαση των σεξουαλικών ταυτοτήτων σήμερα. Στη συνέχεια, υπάρχει μια παρουσίαση του θέματος των «Ετεροτοπιών» και των αρχών τους, όπως το συνέλαβε και το ανέπτυξε ο Michel Foucault. Γίνεται αναφορά στην έννοια και την ιστορία της Σημειωτικής καθώς και στο θέμα των «αξιών». Ακολουθεί ανάλυση αποσπασμάτων, που διαδραματίζονται σε Ετεροτοπίες, από τα δύο υπό μελέτη έργα. Εντοπίζονται οι κώδικες που αναφέρονται σε αξίες, όπως αυτές ορίστηκαν στο θεωρητικό κομμάτι της εργασίας, οι κώδικες αυτοί καταγράφονται και καταμετρούνται. Τέλος, γίνεται μια γενική καταγραφή και καταμέτρηση των κωδίκων και εξάγεται μια σειρά από συμπεράσματα σχετικά με την παρουσία τους και τον τρόπο με τον οποίο μεταβάλλονται από το ένα έργο στο άλλο
description: Locating and recording the code of values of the homosexual character of two works by Italian writer Pier Vittorio Tondelli is the subject of this thesis. The research was conducted on the writer’s works, Altri Libertini and Camere Separate. Initially, the distinction between “gender” and “sex” is presented, followed by a historical overview of the subject of sexuality and homosexuality and a brief presentation of sexual identities today. A presentation of “Heterotopias” and their principles, as conceived and explained by M. Foucault, follows. A reference is made on the subject and the history of Semiotics as well as on the subject of “values”. Afterwards, excerpts of the two works, that take place in Heterotopias, are analyzed. The codes that refer to values, as they have been defined in the theoretical part of the thesis, are located. These codes are registered and counted. Finally, a general registration and counting of the codes is conducted and a series of conclusions is extracted, regarding the presence of the aforementioned codes and the way in which they change from one work to the other
Entrevista sobre templos y líderes sacerdotales yanesha
Creators: name: Huayol, Domingo
name: Santos Granero, Fernando
name: Valerio Dionisio, Marín
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: ame

description: Fragmento poco audible y tal vez repetido de la entrevista más grande que le hizo Marín Valerio sobre el mismo tema. Transcrito, traducido y mecanografiado.
Spheroids scaling relations over cosmic time
Creators: name: Treu, Tommaso
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: I report on recent measurements of two scaling relations of spheroids in the distant universe: the Fundamental Plane, and the relation between lensing velocity dispersion and stellar velocity dispersion. The joint analysis of the two scaling relations indicates that the most massive (above 10^11.5 solar masses) spheroids are consistent with no evolution since z~1 both in terms of star formation and internal structure. Furthermore their total mass density profile is on average well described by an isothermal sphere with no evidence for redshift evolution. At smaller masses the picture appears to be substantially different, as indicated by evidence for substantial recent star formation (as much as 20-40% of stellar mass formed since z~1), and by hints of a reduced dark matter content at smaller masses. A larger sample of lenses extending to velocity dispersions below 200 km/s, and to redshifts above >0.5 is needed to verify these trends.
description: invited paper at the 235th IAU symposium Galaxy evolution across the Hubble Time
Η συμμόρφωση της Διοίκησης στις ακυρωτικές αποφάσεις των διοικητικών δικαστηρίων
Creators: name: Σφήκα, Γεωργία Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: Συμμόρφωση
Διοίκηση
Ακυρωτικές Αποφάσεις
Cοmpliance
Administration
Administrative Court

description: Σκοπός της παρούσας διπλωματικής εργασίας είναι να παρουσιάσει σφαιρικά το καθεστώς που ισχύει κατά συμμόρφωση της Διοίκησης στις ακυρωτικές αποφάσεις των διοικητικών δικαστηρίων. Αρχικά, παρουσιάζονται οι αρχές που αποτελούν το θεμέλιό της, δηλαδή του κράτους δικαίου, της νομιμότητας της διοικητικής δράσης, της διάκρισης των λειτουργιών, και το δικαίωμα δικαστικής προστασίας, ενώ γίνεται και αναφορά στο συνταγματικό κείμενο που αποτυπώνεται ρητά πλέον η υποχρέωση της Διοίκησης. Στη συνέχεια γίνεται η διάκριση από συγγενείς έννοιες, όπως το διαπλαστικό αποτέλεσμα της ακυρωτικής απόφασης και το δεδικασμένο. Κεντρικός άξονας της εργασίας είναι η διάκριση της συμμόρφωσης σε θετική και αποθετική ενώ παρουσιάζεται εκτενώς το περιεχόμενο των δύο εννοιών. Τέλος, δεν θα μπορούσε να λείπει μία επισκόπηση των λόγων μη συμμόρφωσης της Διοίκησης στις δικαστικές αποφάσεις και οι προτάσεις για την αντιμετώπιση του φαινομένου
description: The purpose of this study is to examine the issue of the compliance of the Administration with the annulment judgments of the administrative court. Initially, we present the principles that are its foundation, which are the principles of the state of justice, the legality of administrative action, the separation of functions, and the right to judicial protection, while reference is made to the constitutional text where the Administration's obligation is now clearly reflected. Then, it is made the differentiation between congenital concepts, such as the constructive effect of the annulment decision and the res judicata. Τhe crucial point of this paper is the distinction of compliance in positive and negative while the content of the two concepts is extensively presented. Finally, an overview of the reasons for non-compliance of the Administration with court decisions could not miss as well as proposals to address the phenomenon
Detecting ionized bubbles in redshifted 21 cm maps
Creators: name: Datta, Kanan K.
name: Bharadwaj, Somnath
name: Choudhury, T. Roy
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The reionization of the Universe, it is believed, occurred by the growth of ionized regions (bubbles) in the neutral intergalactic medium (IGM). We study the possibility of detecting these bubbles in radio-interferometric observations of redshifted neutral hydrogen (HI) 21 cm radiation. The signal 1 mJy will be buried in noise and foregrounds, the latter being at least a few orders of magnitude stronger than the signal. We develop a visibility based formalism that uses a filter to optimally combine the entire signal from a bubble while minimizing the noise and foreground contributions. This formalism makes definite predictions on the ability to detect an ionized bubble or conclusively rule out its presence in a radio- interferometric observation. We make predictions for the currently functioning GMRT and a forthcoming instrument, the MWA at a frequency of 150 MHz (corresponding to a redshift of 8.5). For both instruments, we show that a 3 sigma detection will be possible for a bubble of comoving radius R_b > 40 Mpc (assuming it to be spherical) in 100 hrs of observation and R_b 22 Mpc in 1000 hrs of observation, provided the bubble is at the center of the field of view. In both these cases the filter effectively removes the expected foreground contribution so that it is below the signal, and the system noise is the deciding criteria. We find that there is a fundamental limitation on the smallest bubble that can be detected arising from the statistical fluctuations in the HI distribution. Assuming that the HI traces the dark matter we find that it will not be possible to detect bubbles with R_b < 8 Mpc using the GMRT and R_b < 16 Mpc using the MWA, however large be the integration time.
description: 11 pages, 10 figures, 1 table. Accepted for Publication in MNRAS. Revised to match the accepted version
Τα εκπαιδευτικά νομοσχέδια του Αθανασίου Ευταξία, 1899
Creators: name: Σαραϊδάρης, Θεόδωρος Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: Εκπαίδευση
Νομοσχέδια
Αθανάσιος Ευταξίας
Education
Bills
Athanasios Eftaxias

description: Σκοπός της διπλωματικής εργασίας είναι να επιχειρήσει να προσεγγίσει τα νομοσχέδια του 1899 που κατέθεσε προς ψήφιση στη Βουλή ο Αθανάσιος Ευταξίας. Να δούμε αν τελικά τα νομοσχέδια του 1899 χρήζουν προσεκτικότερης ερευνητικής ματιάς. Πρόκειται για μία μελέτη που έχει ως στόχο να απαντήσει στα ερωτήματα αναφορικά με το περιεχόμενο των νομοσχεδίων, τα στοιχεία που τα διαφοροποιεί από προηγούμενες μεταρρυθμιστικές προσπάθειες, τις επιδράσεις στη διαμόρφωση των νομοσχεδίων αυτών, καθώς και τις επιδράσεις που αυτά είχαν στην ελληνική παιδαγωγική σκέψη της εποχής και μετέπειτα. Η παρούσα εργασία καλείται να ερμηνεύσει, να αποκαλύψει και να αντιπαρατεθεί με κείμενα πολιτικής ιστοριογραφίας, με νομοθετικά κείμενα, εισηγητικές εκθέσεις, πολιτικούς λόγους και τη γενικότερη εκπαιδευτική πραγματικότητα της εποχής που εξετάζουμε
description: The aim of the diploma thesis is to attempt to approach the 1899 bills submitted by Athanasios Eftaxias to the Parliament. Let's see if the 1899 bills need a more careful research look. This is a study aimed at answering the questions regarding the content of the drafts, the elements that differentiate them from previous reform efforts, the effects on the drafting of these drafts, as well as the effects they had on the Greek pedagogical thinking of the time and afterwards. This work is meant to interpret, reveal and contrast with texts of political historiography, with legislative texts, introductory reports, political reasons and the general educational reality of the time we are examining
Crystal field theory of Co$^{2+}$ in doped ZnO
Creators: name: Kuzian, R. O.
name: Daré, A. M.
name: Sati, P.
name: Hayn, R.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We present a crystal field theory of transition metal impurities in semiconductors in a trigonally distorted tetrahedral coordination. We develop a perturbative scheme to treat covalency effects within the weak ligand field case (Coulomb interaction dominates over one-particle splitting) and apply it to ZnO:Co$^{2+}$ (3d$^7$). Using the large value of the charge transfer energy $Δ_{pd}$ compared to the $p$-$d$ hoppings, we perform a canonical transformation which eliminates the coupling with ligands to first order. As a result, we obtain an effective single-ion Hamiltonian, where the influence of the ligands is reduced to the one-particle 'crystal field' acting on $d$-like-functions. This derivation allows to elucidate the microscopic origin of various 'crystal field' parameters and covalency reduction factors which are usually used empirically for the interpretation of optical and ESR experiments. The connection of these parameters with the geometry of the local environment becomes transparent. The experimentally known $g$-values and the zero-field splitting 2D are very well reproduced by the exact diagonalization of the effective single-ion Hamiltonian with only one adjustable parameter $Δ_{pd}$. Alternatively to the numerical diagonalization we use perturbation theory in the weak field scheme (Coulomb interaction $\gg$ cubic splitting $\gg$ trigonal splitting and spin-orbit coupling) to derive compact analytical expressions for the spin-Hamiltonian parameters that reproduce the result of exact diagonalization within 20% of accuracy.
description: 28 pages, 3 figures
Beyond Perturbation Theory in Inflation
Creators: name: Celoria, Marco
name: Creminelli, Paolo
name: Tambalo, Giovanni
name: Yingcharoenrat, Vicharit
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Inflationary perturbations are approximately Gaussian and deviations from Gaussianity are usually calculated using in-in perturbation theory. This method, however, fails for unlikely events on the tail of the probability distribution: in this regime non-Gaussianities are important and perturbation theory breaks down for $|ζ| \gtrsim |f_{\rm \scriptscriptstyle NL}|^{-1}$. In this paper we show that this regime is amenable to a semiclassical treatment, $\hbar \to 0$. In this limit the wavefunction of the Universe can be calculated in saddle-point, corresponding to a resummation of all the tree-level Witten diagrams. The saddle can be found by solving numerically the classical (Euclidean) non-linear equations of motion, with prescribed boundary conditions. We apply these ideas to a model with an inflaton self-interaction $\propto λ\dotζ^4$. Numerical and analytical methods show that the tail of the probability distribution of $ζ$ goes as $\exp(-λ^{-1/4}ζ^{3/2})$, with a clear non-perturbative dependence on the coupling. Our results are relevant for the calculation of the abundance of primordial black holes.
description: 37 pages, 14 figures. Matches JCAP version
Spending the inheritance : undifferentiated production and the competitive dynamics of the post-war forest industry: the case of British Columbia forest products and MacMillan Bloedel 1945-1979
Creators: name: Kennedy, Graham E.
Publisher: name: University of British Columbia
Year: 2009

description: The continued production of undifferentiated products in the B.C. forest industry has fascinated and divided provincial historians. The causes of this orientation of production are varied and complex. The provincial government and British Columbia's forest companies have each played a role in determining the orientation of production. The undifferentiated end products of these firms were the consequence of conscious government and business decisions made in British Columbia in the post-war period (1945 - 1979). B.C. forest resources were (and remain) owned and administrated by the government. Private access to these assets was (and is) determined by provincial statute. The government was instrumental in orienting the undifferentiated production undertaken by MacMillan Bloedel and B.C.F.P. in two fashions: by systematically subtracting value from the resource in order to attract capital to the industry; and, by adopting a variety of other policy initiatives that promoted the establishment of large-scale enterprises. Professor Michael E. Porter, in his book, The Competitive Advantage of Nations, argues that a firm's end products are the result of its competitive advantages and disadvantages. The two firms examined in this essay possessed two competitive advantages that promoted undifferentiated production: a high degree of productive integration from supply through to marketing: and large-scale production. Competitive disadvantages can allow a firm's products to become less advanced over time, or can preclude the advance to more differentiated production. Four competitive disadvantages prevented the development of differentiated products by Macmillan Bloedel and B.C.F.P. First, a super abundance of timber perpetuated undifferentiated production. With the continued supply of excellent quality timber protected by the government, competitive supply pressures were eliminated, and the resource was not evaluated or utilized to its maximum potential. Second, the integration of downstream supply networks by M.B. and B.C.F.P. impoverished lower levels of the industry. While this provided cost advantages to the producers, it limited the number of suppliers. Third, managerial incompetence at MacMillan Bloedel , and a narrowness of focus at B.C.F.P., limited the productive opportunities of these two firms. Finally, the collaboration of the two firms in marketing their undifferentiated products also diminished competitive pressures needed to promote differentiated production. Thus, contrary to some previous analytic approaches, the production orientation of these two firms can be explained with an historical analysis of their competitive advantages and disadvantages in the post-war period.
Η έννοια της προαιρέσεως στον Αριστοτέλη και τον Επίκτητο.
Creators: name: Μέρλιν, Αθανασίου Ντενίζ
Publisher: name: Aristotle University of Thessaloniki
Year: 2024
Subjects: Προαίρεση
Ελευθερία της βούλησης
Ηθική φιλοσοφία της πράξης
Prohairesis
Free will
Ancient greek ethics

description: Η παρούσα μεταπτυχιακή διπλωματική εργασία επικεντρώνεται στην έννοια της προαιρέσεως, στην ηθική φιλοσοφία του Αριστοτέλη και του Επίκτητου. Έγινε προσπάθεια να εξεταστεί συγκριτικά η προβληματική της έννοιας στους δύο φιλοσόφους και να παρουσιαστούν μερικές ερμηνείες, από την πληθώρα των ερμηνειών που υπάρχουν διεθνώς στη βιβλιογραφία. Εξετάζεται, επιπλέον, η σχέση της προαιρέσεως με την τύχη, την εὔροια βίου και την ελευθερία της βούλησης. Στο ίδιο πλαίσιο υπάρχει μια σύντομη αναφορά στην προέλευση του όρου. Ειδικότερα, εξετάζεται η χρήση του όρου προαίρεσις, ο οποίος κατέχει κεντρική θέση στην ηθική φιλοσοφία της πράξης, στους δύο φιλόσοφους, παρουσιάζονται τα χαρακτηριστικά του και τελικά οι αντιθέσεις που τον διαφοροποιούν στα δύο φιλοσοφικά δόγματα. Τέλος, απώτερος στόχος της εργασίας ήταν να αναδειχθούν οι προεκτάσεις που έχει η έννοια της προαιρέσεως τόσο στον Αριστοτέλη, ως αρχή της πράξεως, όσο και στον Επίκτητο, ως συντελεστικό στοιχείο του χαρακτήρα, για τη ζωή, την πράξη και την ποιότητα του ανθρώπου.
description: The subject of this dissertation is focused on the concept of prohairesis in the ethics of Aristotle and Epictetus. It has been argued whether there is a justified relationship between prohairesis and fate, prosperous life and free will. In the same context, there is a short reference on the origin of the term. As a matter of fact, it is discussed how the two philosophers used the term in their ethics, as something vital for the philosophy of action and some interpretations from the international academic discussion on the topic are presented. This dissertation mainly develops a comparative approach on prohairesis among Aristotle and Epictetus and there are some common characteristics mentioned. Overall, the differences between the Aristotelian and Epictetian concept of prohairesis are highlighted. The goal is to brighten the concept of prohairesis both in Aristotle, as a principle of action and in Epictetus as a moral value, which forms human character.
description: Το Διατμηματικό Πρόγραμμα Μεταπτυχιακών Σπουδών (ΔΠΜΣ) “Φιλοσοφία: Κείμενα, Ερμηνείες, Πρακτικές” λειτουργεί από το ακαδ. έτος 2018-19. Υποστηρίζεται από το Τμήμα Φιλοσοφίας και Παιδαγωγικής (Τομέας Φιλοσοφίας), το Τμήμα Νομικής και το Τμήμα Πολιτικών Επιστημών του Α.Π.Θ.
From ETH to algebraic relaxation of OTOCs in systems with conserved quantities
Creators: name: Balachandran, Vinitha
name: Benenti, Giuliano
name: Casati, Giulio
name: Poletti, Dario
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The relaxation of out-of-time-ordered correlators (OTOCs) has been studied as a mean to characterize the scrambling properties of a quantum system. We show that the presence of local conserved quantities typically results in, at the fastest, an algebraic relaxation of the OTOC provided (i) the dynamics is local and (ii) the system follows the eigenstate thermalization hypothesis. Our result relies on the algebraic scaling of the infinite-time value of OTOCs with system size, which is typical in thermalizing systems with local conserved quantities, and on the existence of finite speed of propagation of correlations for finite-range-interaction systems. We show that time-independence of the Hamiltonian is not necessary as the above conditions (i) and (ii) can occur in time-dependent systems, both periodic or aperiodic. We also remark that our result can be extended to systems with power-law interactions.
description: 14 pages, 7 figures
Oscillatory Instability in Two-Dimensional Dynamic Fracture
Creators: name: Bouchbinder, Eran
name: Procaccia, Itamar
Publisher: name: arXiv
Year: 2006
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The stability of a rapid dynamic crack in a two dimensional infinite strip is studied in the framework of Linear Elasticity Fracture Mechanics supplemented with a modified principle of local symmetry. It is predicted that a single crack becomes unstable by a finite wavelength oscillatory mode at a velocity $v_c$, $0.8c_R
description: 4 pages, 1 figure
JALOLIDDIN RUMIY MA'NAVIY MEROSI VA UNING TAFAKKURIDAN TARALGAN MA'NAVIY NURLAR
Creators: name: Mardonova, Madina
Publisher: name: Zenodo
Year: 2024

description: Ushbu maqolada Jaloliddin Rumiyning ma'naviyati va uning falsafasidan kelib chiqqan asosiy g‘oyalar tahlil qilinadi. Rumiyning so'fiylik falsafasi, inson ruhiy yuksalishi va ma'naviy o‘sishga bo‘lgan qarashlari zamonaviy jamiyat uchun ahamiyati yoritiladi.
Δημιουργία αλγόριθμου για την εύρεση της συνάρτησης (πίνακα) μεταφοράς αντισταθμιστών-ελεγκτών σε γραμμικά πολυμεταβλητά συστήματα και ανάπτυξη γραφικού περιβάλλοντος (gui)
Creators: name: Καμούτσης, Κωνσταντίνος Ιωάννη
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: Αυτόματος Έλεγχος
Πολυμεταβλητά συστήματα
Ελεγκτής-Αντισταθμιστής
Automatic Control
Multivariable systems
Stabilizers-Compensators

description: Η παρούσα διπλωματική εργασία έχει ως στόχο την ανάπτυξη αλγορίθμου καθώς και ενός διαδραστικού περιβάλλοντος για την εύρεση του κατάλληλου ελεγκτή – αντισταθμιστή με τον οποίο θα μπορέσουμε να έχουμε την επιθυμητή απόκριση για το σύστημά μας. Η ανάπτυξη του διαδραστικού περιβάλλοντος υλοποιήθηκε με την χρήση του graphical user interface (GUI) του λογισμικού MATLAB. Το πλεονέκτημα χρήσης ενός γραφικού περιβάλλοντος σε μια εφαρμογή είναι πολύ μεγάλο, επειδή η εφαρμογή γίνεται πιο φιλική στον τελικό χρηστή και δεν είναι απαραίτητη προϋπόθεση ο χρήστης να γνωρίζει αρκετά καλά το λογισμικό. Για την υλοποίηση του αλγόριθμου εύρεσης του επιθυμητού ελεγκτή χρησιμοποιήθηκαν δύο μέθοδοι. Η πρώτη είναι μέσω τη βιβλιοθήκης poly-x και η δεύτερη μέσω των γενικευμένων Wolovich resultants
description: This project aims to the creation of an algorithm and a graphical user interface, to compute the controller-compensator for the desired time response of our system. The graphical user interface designed with Matlab. The advantages of GUI are plenty, as it is a friendly environment for the user as it is not needed to have good knowledge of the software. Two methods used to construct the algorithm. The one is with the use of toolbox poly-x and the other one is through Wolovich resultants
Population dynamics with a stable efficient equilibrium
Creators: name: Miekisz, Jacek
name: Platkowski, Tadeusz
Publisher: name: arXiv
Year: 2007
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: FOS: Biological sciences

description: We propose a game-theoretic dynamics of a population of replicating individuals. It consists of two parts: the standard replicator one and a migration between two different habitats. We consider symmetric two-player games with two evolutionarily stable strategies: the efficient one in which the population is in a state with a maximal payoff and the risk-dominant one where players are averse to risk. We show that for a large range of parameters of our dynamics, even if the initial conditions in both habitats are in the basin of attraction of the risk-dominant equilibrium (with respect to the standard replication dynamics without migration), in the long run most individuals play the efficient strategy.
description: 12 pages
Primordial Non-Gaussianity and Analytical Formula for Minkowski Functionals of the Cosmic Microwave Background and Large-scale Structure
Creators: name: Hikage, Chiaki
name: Komatsu, Eiichiro
name: Matsubara, Takahiko
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We derive analytical formulae for the Minkowski Functions of the cosmic microwave background (CMB) and large-scale structure (LSS) from primordial non-Gaussianity. These formulae enable us to estimate a non-linear coupling parameter, f_NL, directly from the CMB and LSS data without relying on numerical simulations of non-Gaussian primordial fluctuations. One can use these formulae to estimate statistical errors on f_NL from Gaussian realizations, which are much faster to generate than non-Gaussian ones, fully taking into account the cosmic/sampling variance, beam smearing, survey mask, etc. We show that the CMB data from the Wilkinson Microwave Anisotropy Probe should be sensitive to |f_NL|\simeq 40 at the 68% confidence level. The Planck data should be sensitive to |f_NL|\simeq 20. As for the LSS data, the late-time non-Gaussianity arising from gravitational instability and galaxy biasing makes it more challenging to detect primordial non-Gaussianity at low redshifts. The late-time effects obscure the primordial signals at small spatial scales. High-redshift galaxy surveys at z>2 covering \sim 10Gpc^3 volume would be required for the LSS data to detect |f_NL|\simeq 100. Minkowski Functionals are nicely complementary to the bispectrum because the Minkowski Functionals are defined in real space and the bispectrum is defined in Fourier space. This property makes the Minksowski Functionals a useful tool in the presence of real-world issues such as anisotropic noise, foreground and survey masks. Our formalism can be extended to scale-dependent f_NL easily.
description: 16 pages, 5 figures, accepted for publication in ApJ (Vol. 653, 2006)
The Interstellar Medium of GRB Host Galaxies I. Echelle Spectra of Swift GRB Afterglows
Creators: name: Prochaska, J. X.
name: Chen, H. -W.
name: Bloom, J. S.
name: Dessauges-Zavadsky, M.
name: O'Meara, J. M.
name: Foley, R. J.
name: Bernstein, R.
name: Burles, S.
name: Dupree, A. K.
name: Falco, E.
name: Thompson, I. B.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present optical echelle spectra of four gamma-ray burst (GRB) afterglows (GRB 050730, GRB 050820, GRB 051111, and GRB 060418) discovered during the first 1.5 years of operation of the Swift satellite and localized by either the Swift telescope or follow-up ground-based imaging. We analyze the spectra to derive accurate column density measurements for the transitions arising in the interstellar medium (ISM) of the GRB host galaxies. These measurements can be used to constrain the physical properties of the ISM including the metallicity, dust-to-gas ratio, ionization state, and chemical abundances of the gas. We also present measurements of the strong MgII systems in the GRB afterglow spectra. With the publication of this paper, we provide the first data release of echelle afterglow spectra by the GRAASP collaboration to the general community.
description: 52 pages, 18 figures. Accepted to ApJS. The spectra will be published with the paper and is also available upon request. A complete version with full-resolution figures is available at http://lambda.uchicago.edu/public/tmp/echelle.pdf
The Importance of Friends and Corporate Finance Practices Around the World
Creators: name: GRAMI, Madaniah-Mohammed-A
Publisher: name: La Trobe
Year: 2024
Subjects: classificationCode: 350207
subject: International finance
classificationCode: 350702
subject: Corporate social responsibility

description: A thesis submitted in total fulfillment of the requirements for the degree of Doctor of Philosophy to the Department of Economics and Finance, La Trobe Business School, College of Arts, Social Sciences and Commerce, La Trobe University, Victoria, Australia.
Assessment of the quality for the NADP/NTN date based on their predictability
Creators: name: Komungoma, Saulati Koku
Publisher: name: University of British Columbia
Year: 2009

description: Three methods are used to predict the ion concentrations of a particular station using the concentrations of the other stations, for the data produced by the National Acidic Deposition (NADP) Network/ National Trends Network (NTN), during the period of1983-86. We relate the degree of predictability to the quality of the data. Stations are ranked in the order in which they would be dropped if the network were, hypothetically, to be reduced in size. The agreement of the ranks given by different methods is assessed. Our study uses monthly volume weighted mean concentrations for each of the three selected ions, investigated one at a time. Since there a large number of stations (86 for hydrogen, 81 for each of the remaining ions) and only 48 months, analyses was carried out on clusters of stations. It was not possible to perform an ordinary regression analysis with a lot of missing data, so the analysis is done with missing values replaced by their estimates.
No supernovae detected in two long-duration Gamma-Ray Bursts
Creators: name: Watson, D.
name: Fynbo, J. P. U.
name: Thöne, C. C.
name: Sollerman, J.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: There is strong evidence that long duration gamma-ray bursts (GRBs) are produced during the collapse of a massive star. In the standard version of the Collapsar model, a broad-lined and luminous Type Ic core-collapse supernova (SN) accompanies the GRB. This association has been confirmed in observations of several nearby GRBs. Recent observations show that some long duration GRBs are different. No SN emission accompanied the long duration GRBs 060505 and 060614 down to limits fainter than any known Type Ic SN and hundreds of times fainter than the archetypal SN1998bw that accompanied GRB980425. Multi-band observations of the early afterglows, as well as spectroscopy of the host galaxies, exclude the possibility of significant dust obscuration. Furthermore, the bursts originated in star-forming galaxies, and in the case of GRBs060505 the burst was localised to a compact star-forming knot in a spiral arm of its host galaxy. We find that the properties of the host galaxies, the long duration of the bursts and, in the case of GRB060505 the location of the burst within its host, all imply a massive stellar origin. The absence of a SN to such deep limits therefore suggests a new phenomenological type of massive stellar death.
description: Proceedings from the Royal Society meeting on GRBs Sept. 2006
Electromagnetic Albedo of Quantum Black Holes
Creators: name: Chua, Wan Zhen
name: Afshordi, Niayesh
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We compute the albedo (or reflectivity) of electromagnetic waves off the electron-positron Hawking plasma that surrounds the horizon of a Quantum Black Hole. We adopt the "modified firewall conjecture" for fuzzballs [arXiv:hep-th/0502050,arXiv:1711.01617], where we consider significant electromagnetic interaction around the horizon. While prior work has treated this problem as an electron-photon scattering process, we find that the incoming quanta interact collectively with the fermionic excitations of the Hawking plasma at low energies. We derive this via two different methods: one using relativistic plasma dispersion relation, and another using the one-loop correction to photon propagator. Both methods find that the reflectivity of long wavelength photons off the Hawking plasma is significant, contrary to previous claims. This leads to the enhancement of the electromagnetic albedo for frequencies comparable to the Hawking temperature of black hole horizons in vacuum. We comment on possible observable consequences of this effect.
description: 18 pages, 5 figures, JHEP accepted version
Global flows for stochastic differential equations without global Lipschitz conditions
Creators: name: Fang, Shizan
name: Imkeller, Peter
name: Zhang, Tusheng
Publisher: name: arXiv
Year: 2007
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60H10, 34F05 (Primary) 60G48, 37C10, 37H10 (Secondary)

description: We consider stochastic differential equations driven by Wiener processes. The vector fields are supposed to satisfy only local Lipschitz conditions. The Lipschitz constants of the drift vector field, valid on balls of radius $R$, are supposed to grow not faster than $\log R$, while those of the diffusion vector fields are supposed to grow not faster than $\sqrt{\log R}.$ We regularize the stochastic differential equations by associating with them approximating ordinary differential equations obtained by discretization of the increments of the Wiener process on small intervals. By showing that the flow associated with a regularized equation converges uniformly to the solution of the stochastic differential equation, we simultaneously establish the existence of a global flow for the stochastic equation under local Lipschitz conditions.
description: Published at http://dx.doi.org/10.1214/009117906000000412 in the Annals of Probability (http://www.imstat.org/aop/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Η μονότονη παλινδρόμηση και η εφαρμογή της στην εκτίμηση κόστους λογισμικού
Creators: name: Παντελή, Ιρις Παντελάκη
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: Μονότονη παλινδρόμηση
Εκτίμηση κόστους λογισμικού
Εκτίμηση προσπάθειας
Monotonic regression
Software cost estimation
Effort estimation

description: Στις μέρες μας, η εκτίμηση κόστους λογισμικού είναι ένα αναπόσπαστο κομμάτι για τις επιχειρήσεις αλλά και για τους επιστήμονες που ασχολούνται με το θέμα. Με την εκτίμηση κόστους λογισμικού λοιπόν, επιτυγχάνεται η πρόβλεψη της προσπάθειας ώστε να αναπτυχθεί ένα έργο λογισμικού. Όσο πιο ακριβείς είναι οι προβλέψεις της προσπάθειας, τόσο καλύτερα. Πόσο εύκολο όμως, είναι να προβλέψει κανείς με ακρίβεια την προσπάθεια που χρειάζεται για την ανάπτυξη ενός έργου; Καθόλου εύκολο και αυτό δικαιολογείται στην παρούσα εργασία, δίνοντας τους λόγους για τους οποίους μία τέτοια διαδικασία δεν είναι εύκολη. Επιπρόσθετα, παρατίθενται τρόποι εκτίμησης του κόστους λογισμικού, καθώς και μοντέλα αυτών. Ο κυριότερος στόχος της συγκεκριμένης εργασίας είναι η μελέτη της μονότονης παλινδρόμησης και η εφαρμογή της σε δεδομένα λογισμικού. Στη συνέχεια, συγκρίνεται με την κλασσική μέθοδο ελαχίστων τετραγώνων, και τέλος, διαπιστώνεται ποια μέθοδος και συνεπώς, ποιο μοντέλο από τα δύο είναι καταλληλότερο για τέτοιου είδους δεδομένα
description: Nowadays, the software cost estimation is not only a very important part of a business but also for the scientists who work on this matter. With the software cost estimation, the prediction of effort speeds up so that the project can develop. The best thing is to have very accurate predictions of an effort. However, it is not so easy for someone to accurately predict how much effort is needed for the development of a project. It is not easy at all, and this can be proved through this project in which all the clarifications and justifications are given. Moreover, ways of software cost estimation are also given as well as models. The main purpose of this specific project is the research of monotonic regression and its application on software data. Additionally, there is a comparison with the ordinary least squares regression method and finally the results show which method and which model of the two is more suitable for such data
Η θεωρία του Καραθεοδωρή για τη συνοριακή συμπεριφορά των σύμμορφων απεικονίσεων
Creators: name: Ζάρβαλης, Κωνσταντίνος Αθανασίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: Σύμμορφες Απεικονίσεις
Συνοριακή Συμπεριφορά
Συνοριακά Στοιχεία
Καραθεοδωρής
Conformal Mappings
Boundary Behavior
Prime Ends

description: Ένα από τα γνωστότερα θεωρήματα της Μιγαδικής Ανάλυσης είναι το Θεώρημα Σύμμορφης Απεικόνισης του Ρίμαν, μέσω του οποίου απεικονίζουμε σύμμορφα οποιονδήποτε απλά συνεκτικό τόπο επί του μοναδιαίου δίσκου. Σκοπός της διπλωματικής εργασίας ήταν η επέκταση αυτού του θεωρήματος στο σύνορο του εκάστοτε τόπου. Αναπτύξαμε τη βασική θεωρία περί σύμμορφων και κανονικών απεικονίσεων. Στη συνέχεια, παρουσιάσαμε τα σύνολα συσσώρευσης και τα συνοριακά στοιχεία, ώστε να διατυπώσουμε τα βασικά θεωρήματα. Ακόμη, δείξαμε μία διαφορετική προσέγγιση όλων των παραπάνω με χρήση του ακροτάτου μήκους. Τέλος, ασχοληθήκαμε με την επέκταση της έννοιας των συνοριακών στοιχείων σε τυχαίο μετρικό χώρο
description: One of the most famous theorems in Complex Analysis is the Riemann Mapping Theorem, which enables us to conformally map any simply connected domain onto the unit disc. The aim of the present bachelor’s thesis was the extension of this theorem to the boundary of the domain in question. We developped the fundamental theory of conformal and normal functions. Then, we presented the notions of cluster sets and prime ends, in order to formulate the basic theorems. Furthermore, we showed a different approach of all of the above by using the extremal length. Finally, we presented an extension of prime ends to an abstract metric space
Low-decoherence flux qubit
Creators: name: You, J. Q.
name: Hu, Xuedong
name: Ashhab, S.
name: Nori, Franco
Publisher: name: arXiv
Year: 2006
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A flux qubit can have a relatively long decoherence time at the degeneracy point, but away from this point the decoherence time is greatly reduced by dephasing. This limits the practical applications of flux qubits. Here we propose a new qubit design modified from the commonly used flux qubit by introducing an additional capacitor shunted in parallel to the smaller Josephson junction (JJ) in the loop. Our results show that the effects of noise can be considerably suppressed, particularly away from the degeneracy point, by both reducing the coupling energy of the JJ and increasing the shunt capacitance. This shunt capacitance provides a novel way to improve the qubit.
description: 4 pages, 4 figures