cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: Βίωση του αστικού χώρου ως παιχνίδι – Στρατηγικές επανάχρησης και ανανοηματοδότησης αστικών κενών εντός της κτιριακής ρυμοτομίας στα Χανιά
Creators: name: Μασσαλα Ελεαννα
Publisher: name: Technical University of Crete
Year: 2015

description: Η παρούσα διπλωματική αποτελεί μια πρόταση σχεδιασμού χώρων παιχνιδιού στην πόλη των Χανίων. Πρόκειται για μια σειρά σημειακών επεμβάσεων  σε υπαίθριους –ημιυπαίθριους  «υπολειμματικούς»  χώρους μικρής κλίμακας που βρίσκονται σε τέσσερις πυκνοκατοικημένες γειτονιές της πόλης (Άνω κουμ καπί, Κάτω κουμ καπί, Μαχαιράδικα,  Σπλάτζια). Στόχος των επεμβάσεων είναι να προτείνουν στρατηγικές επανάχρησης και ανανοηματοδότησης αποκεντρωμένων χώρων μικρής κλίμακας έτσι ώστε να αποτελέσουν έναυσμα για τη βίωση του χώρου ως παιχνίδι, ως ανακάλυψη, ως δημιουργική διαδικασία και να ενισχύσουν τη  βιωματική/ μετασχηματιστική χρήση του δημόσιου χώρου.
Κατά συνέπεια, οι χώροι παιχνιδιού σχεδιάζονται πέρα από τα όρια της εξυπηρέτησης μια συγκεκριμένης λειτουργίας και δίνοντας ιδιαίτερη έμφαση στα στοιχεία της εξερεύνησης και της μεταβλητότητας. Πιο συγκεκριμένα, βασικοί συνθετικοί στόχοι αποτέλεσαν η σταδιακή αποκάλυψη του χώρου μέσω της κίνησης του χρήστη, οι συνεχείς εναλλαγές της ατμόσφαιρας των χώρων (μέσω των εναλλαγών στην κλίμακα, τον φωτισμό, τη γεωμετρία του χώρου κ.α.), η δυνατότητα των κατασκευών να χρησιμοποιηθούν με ποικίλους τρόπους αλλά και η δημιουργία μεταβαλλόμενων στοιχείων στο χώρο ώστε ο χρήστης να μπορεί να επέμβει σε αυτόν και να τον μετασχηματίσει.
Maximum Likelihood-based Gridless DoA Estimation Using Structured Covariance Matrix Recovery and SBL with Grid Refinement
Creators: name: Pote, Rohan R.
name: Rao, Bhaskar D.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Signal Processing (eess.SP)
subject: Information Theory (cs.IT)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: We consider the parametric data model employed in applications such as line spectral estimation and direction-of-arrival estimation. We focus on the stochastic maximum likelihood estimation (MLE) framework and offer approaches to estimate the parameter of interest in a gridless manner, overcoming the model complexities of the past. This progress is enabled by the modern trend of reparameterization of the objective and exploiting the sparse Bayesian learning (SBL) approach. The latter is shown to be a correlation-aware method, and for the underlying problem it is identified as a grid-based technique for recovering a structured covariance matrix of the measurements. For the case when the structured matrix is expressible as a sampled Toeplitz matrix, such as when measurements are sampled in time or space at regular intervals, additional constraints and reparameterization of the SBL objective leads to the proposed structured matrix recovery technique based on MLE. The proposed optimization problem is non-convex, and we propose a majorization-minimization based iterative procedure to estimate the structured matrix; each iteration solves a semidefinite program. We recover the parameter of interest in a gridless manner by appealing to the Caratheodory-Fejer result on decomposition of PSD Toeplitz matrices. For the general case of irregularly spaced time or spatial samples, we propose an iterative SBL procedure that refines grid points to increase resolution near potential source locations, while maintaining a low per iteration complexity. We provide numerical results to evaluate and compare the performance of the proposed techniques with other gridless techniques, and the CRB. The proposed correlation-aware approach is more robust to environmental/system effects such as low number of snapshots, correlated sources, small separation between source locations and improves sources identifiability.
description: Submitted to the IEEE Transactions on Signal Processing (Previous submission date: 29-Oct-2021)
Additional file 1 of Registered nurses’ exposure to workplace aggression in Norway: 12-month prevalence rates, perpetrators, and current turnover intention
Creators: name: Ose, Solveig Osborg
name: Lohmann-Lafrenz, Signe
name: Kaspersen, Silje L.
name: Berthelsen, Hanne
name: Marchand, Gunn Hege
Publisher: name: figshare
Year: 2023
Subjects: Medicine
Biotechnology
Biological Sciences not elsewhere classified
Science Policy

description: Supplementary Material 1
Towards Holographic Spintronics
Creators: name: Hashimoto, Koji
name: Iizuka, Norihiro
name: Kimura, Taro
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study transport phenomena of total angular momentum in holography, as a first step toward holographic understanding of spin transport phenomena. Spin current, which has both the local Lorentz index for spins and the space-time vector index for current, couples naturally to the bulk spin connection. Therefore the bulk spin connection becomes the source for the boundary spin current. This allows us to evaluate the spin current holographically, with a relation to the stress tensor and metric fluctuations in the bulk. We examine the spin transport coefficients and the thermal spin Hall conductivity in a simple holographic setup.
description: 9 pages, 3 figures. v2: minor improvements, published version
Solving the Schrodinger equation with genetic algorithms: a practical approach
Creators: name: Lahoz-Beltra, Rafael
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Neural and Evolutionary Computing (cs.NE)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: The Schrodinger equation is one of the most important equations in physics and chemistry and can be solved in the simplest cases by computer numerical methods. Since the beginning of the 70s of the last century the computer began to be used to solve this equation in elementary quantum systems, e.g. and in the most complex case a hydrogen-like system. Obtaining the solution means finding the wave function, which allows predicting the physical and chemical properties of the quantum system. However, when a quantum system is more complex than a hydrogen-like system then we must be satisfied with an approximate solution of the equation. During the last decade the application of algorithms and principles of quantum computation in disciplines other than physics and chemistry, such as biology and artificial intelligence, has led to the search for alternative techniques with which to obtain approximate solutions of the Schrodinger equation. In this paper, we review and illustrate the application of genetic algorithms, i.e. stochastic optimization procedures inspired by Darwinian evolution, in elementary quantum systems and in quantum models of artificial intelligence. In this last field, we illustrate with two toy models how to solve the Schrodinger equation in an elementary model of a quantum neuron and in the synthesis of quantum circuits controlling the behavior of a Braitenberg vehicle.
description: preprint
Infinite-dimensional Bayesian filtering for detection of quasi-periodic phenomena in spatio-temporal data
Creators: name: Solin, Arno
name: Särkkä, Simo
Publisher: name: arXiv
Year: 2013
Subjects: subject: Computation (stat.CO)
subject: FOS: Computer and information sciences

description: This paper introduces a spatio-temporal resonator model and an inference method for detection and estimation of nearly periodic temporal phenomena in spatio-temporal data. The model is derived as a spatial extension of a stochastic harmonic resonator model, which can be formulated in terms of a stochastic differential equation (SDE). The spatial structure is included by introducing linear operators, which affect both the oscillations and damping, and by choosing the appropriate spatial covariance structure of the driving time-white noise process. With the choice of the linear operators as partial differential operators, the resonator model becomes a stochastic partial differential equation (SPDE), which is compatible with infinite-dimensional Kalman filtering. The resulting infinite-dimensional Kalman filtering problem allows for a computationally efficient solution as the computational cost scales linearly with measurements in the temporal dimension. This framework is applied to weather prediction and to physiological noise elimination in fMRI brain data.
description: 9 pages, 5 figures (added references, extended discussion, other minor improvements)
title: Ζώντας, δρώντας και αντιδρώντας στο υπέδαφος: η υπόγεια βιώσιμη πόλη
Creators: name: Μυλωνα Παναγιωτα
Publisher: name: Technical University of Crete
Year: 2015

description: Το υπόγειο -ασαφής εννοιολογικά και παρεξηγημένος συναισθηματικά χώρος- μελετάται διεξοδικά και αναδεικνύεται μέσα από την ιστορία του, τις χρήσεις του και τη νέα δυναμική που αναπτύσσει στο παρόν και το μέλλον. Ποτέ άλλοτε χώρος δε συνδέθηκε με τόσες αντιφατικές καταστάσεις, όπως μύθοι, συνομωσιολογίες, μυστήρια και συμβατικές πραγματικότητες. Ποτέ άλλοτε χώρος δε φιλοξένησε τόσες ποικίλες χρήσεις και δραστηριότητες στην ιστορία της ανθρωπότητας. Υπήρξε καταφύγιο του ανθρώπου, της ψυχής του, των διωγμών του, της παράνομης δραστηριότητάς του, καθώς και χώρος εργασίας, αποθήκευσης, ταφής των νεκρών, ακόμη και μόνιμης κατοικίας. Ποτέ άλλοτε οι άνθρωποι δεν είχαν τόσα αρνητικά συναισθήματα για έναν χώρο, και ταυτόχρονα να συμπορεύονται με αυτόν σε όλη την ιστορική τους διαδρομή. Σήμερα, το καίριο και οξύ πρόβλημα της περιβαλλοντικής κρίσης, μεταξύ άλλων δράσεων, ανασύρει το περιθωριοποιημένο υπόγειο και το τοποθετεί στο κάδρο των νέων εναλλακτικών, σχεδιαστικών προτάσεων και εξελίξεων. Τα ποιοτικά χαρακτηριστικά του, όπως αυτό της θερμικής αδράνειας του εδάφους και κατά συνέπεια της μείωσης του ενεργειακού αποτυπώματος στο περιβάλλον, το καθιστούν ανταγωνιστικό, με αποτέλεσμα η αξιοποίησή του στον τομέα της δόμησης να είναι πια γεγονός. Η υπόγεια πόλη βρίσκεται σε πρώτο πλάνο σε όλες τις νέες, καινοτόμες και αποτελεσματικές σχεδιαστικές προτάσεις ή μελέτες αρχιτεκτόνων που οραματίζονται και επιχειρούν τη δημιουργία βιώσιμων πόλεων. Αυτό που μένει είναι να βρεθούν αντισταθμιστικές λύσεις στις αρνητικές αντιδράσεις και τους συνειρμούς του ανθρώπου που εγείρονται σχετικά με τη χρήση του υπογείου χώρου, ως μόνιμη κατοικία.
HIV and the Law: Integrating Law, Policy, and Social Epidemiology
Creators: name: Lazzarini, Zita
name: Klitzman, Robert L.
Publisher: name: Columbia University
Year: 2002
Subjects: HIV-positive persons--Legal status, laws, etc.
HIV infections--Law and legislation
HIV infections--Risk factors
HIV infections--Government policy
HIV infections--Epidemiology

description: This article will consider first how laws in the United States could plausibly act as pathways, or mechanisms, by which deeper social determinants affect health, specifically HIV risk and resilience. Next, it will address the role of law in shaping those determinants themselves. For each example, we will ask the following questions: (1) how do law and policy link with risk; (2) what evidence supports this link; (3) what conclusions can we draw from the relationship between law/policy and risk; and (4) based on these conclusions, what policy options or research questions can we identify that will enhance the use of law/policy as a structural intervention. The article does not specifically address the role of law in HiV in the developing world, where the vast majority of the estimated 40 million people currently living with HIV reside.
Strong lensing time-delay cosmography in the 2020s
Creators: name: Treu, T.
name: Suyu, S. H.
name: Marshall, P. J.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Multiply imaged time-variable sources can be used to measure absolute distances as a function of redshifts and thus determine cosmological parameters, chiefly the Hubble Constant H$_0$. In the two decades up to 2020, through a number of observational and conceptual breakthroughs, this so-called time-delay cosmography has reached a precision sufficient to be an important independent voice in the current ``Hubble tension'' debate between early- and late-universe determinations of H$_0$. The 2020s promise to deliver major advances in time-delay cosmography, owing to the large number of lenses to be discovered by new and upcoming surveys and the vastly improved capabilities for follow-up and analysis. In this review -- after a brief summary of the foundations of the method and recent advances -- we outline the opportunities for the decade and the challenges that will need to be overcome in order to meet the goal of the determination of H$_0$ from time-delay cosmography with 1\% precision and accuracy.
description: The Astronomy and Astrophysics Review, in press
title: Ο φυσικός φωτισμός στην ατμόσφαιρα του αρχιτεκτονικού χώρου. Οι περιπτώσεις των Peter Zumthor και Tadao Ando
Creators: name: Τσουτσος Σπυριδων
Publisher: name: Technical University of Crete
Year: 2015

description: Σκοπός της εργασίας είναι να γίνουν διακριτοί στον αναγνώστη οι αρχιτεκτονικοί παράγοντες οι οποίοι διαμορφώνουν την ατμόσφαιρα του χώρου. Με κεντρικό άξονα τις ψυχολογικές, φιλοσοφικές και αρχιτεκτονικές θεωρίες που παρατίθενται στην εργασία, να συμπεριλάβει στην κρίση του την επιρροή του από την  ατμόσφαιρα του χώρου, καθώς μέσω αυτής οξύνονται οι αισθήσεις του και αντιλαμβάνεται τη γενικότερη αίσθηση που διέπει έναν χώρο.
Στο πρώτο κεφάλαιο αναλύονται η έννοια του χώρου, η ατμόσφαιρα καθώς και οι αντιληπτικές ικανότητες του ατόμου ώστε ο αναγνώστης να κατανοήσει στα επόμενα κεφάλαια τον ρόλο που παίζουν τα παραπάνω κατά τη διάρκεια μιας βιωματικής εμπειρίας. Επίσης μέσω αρχιτεκτονικών παραδειγμάτων αναλύεται εκτενέστερα το φυσικό φως ως ένα βασικό στοιχείο το οποίο διαδραματίζει σημαντικό ρόλο στην ατμόσφαιρα του χώρου. Στα επόμενα κεφάλαια η μελέτη στηρίζεται στην παράθεση και περαιτέρω ανάλυση δύο χαρακτηριστικών παραδειγμάτων, του Koshino House του Tadao Ando και του Therme Vals του Peter Zumthor.  Μέσω της διαφορετικότητας των έργων δίνεται η ευκαιρία να  αναλυθούν και να συγκριθούν πολλές πτυχές του φυσικού φωτός το οποίο σε αλληλεπίδραση με άλλα αρχιτεκτονικά στοιχεία αποδίδει ατμόσφαιρα στον χώρο.
Towards a Quantum Simulation of Nonlinear Sigma Models with a Topological Term
Creators: name: Araz, Jack Y.
name: Schenk, Sebastian
name: Spannowsky, Michael
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We determine the mass gap of a two-dimensional $O(3)$ nonlinear sigma model augmented with a topological $θ$-term using tensor network and digital quantum algorithms. As proof of principle, we consider the example $θ= π$ and study its critical behaviour on a quantum simulator by examining the entanglement entropy of the ground state. We confirm that the quantum theory is massless in the strong-coupling regime, in agreement with analytical results. However, we also highlight the limitations of current quantum algorithms, designed for noisy intermediate-scale quantum devices, in the theory simulation at weak coupling. Finally, we compare the performance of our quantum algorithms to classical tensor network methods.
description: 12 pages, 6 figures, 2 tables. v2: minor modifications, references added
The crater-induced YORP effect
Creators: name: Zhou, Wen-Han
name: Zhang, Yun
name: Yan, Xiaoran
name: Michel, Patrick
Publisher: name: arXiv
Year: 2022
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The Yarkovsky-O'Keefe-Radzievskii-Paddack (YORP) effect plays an important role in the rotational properties and evolution of asteroids. While the YORP effect induced by the macroscopic shape of the asteroid and by the presence of surface boulders has been well studied, no investigation has been performed yet regarding how craters with given properties influence this effect. We introduce and estimate the crater-induced YORP effect (CYORP), which arises from the concave structure of the crater, to investigate the magnitude of the resulting torques as a function of varying properties of the crater and the asteroid by a semi-analytical method. The CYORP torque can be comparable to the normal YORP torque when the size of the crater is about one-tenth of the size of the asteroid, or equivalently when the crater/roughness covers one-tenth of the asteroid's surface. Although the torque decreases with the crater size, the combined contribution of all small craters can become non-negligible due to their large number when the commonly used power-law crater size distribution is considered. The CYORP torque of small concave structures, usually considered as surface roughness, is essential to the accurate calculation of the complete YORP torque. Under the CYORP effect that is produced by collisions, asteroids go through a random walk in spin rate and obliquity, with a YORP reset timescale typically of 0.4 Myr. This has strong implications for the rotational evolution and orbital evolution of asteroids. Craters and roughness on asteroid surfaces can influence the YORP torques and therefore the rotational properties and evolution of asteroids. We suggest that the CYORP effect should be considered in the future investigation of the YORP effect on asteroids.
description: 13 pages, 7 figures. Accepted by A&A
title: Συμβολή της ηλεκτρικής τομογραφίας στην χαρτογράφηση καρστικών εγκοίλων στην περιοχή Αεροδρομίου του Ν. Χανίων

Creators: name: Καμπακη Μαρια-Κωνσταντινα
Publisher: name: Technical University of Crete
Year: 2016

description: Η παρούσα διπλωματική εργασία πραγματεύεται την επεξεργασία και ερμηνεία της γεωφυσικής διασκόπησης, για τον εντοπισμό καρστικών εγκοίλων κατά την εκσκαφή της επέκτασης του Κρατικού Αερολιμένα Χανίων. Η γεωφυσική έρευνα έγινε με την μέθοδο της ηλεκτρικής τομογραφίας.
Τα δεδομένα προέκυψαν μετά από σχετικές μετρήσεις που κρίθηκε απαραίτητο αλλά και αναγκαίο να  πραγματοποιηθούν κύρια στη θέση αλλά και στην ευρύτερη περιοχή για την ασφαλή ανέγερση της επέκτασης του κτιρίου.Τα δεδομένα επεξεργάστηκαν με τη χρήση κατάλληλων λογισμικών αλλά και μεθόδων αντιστροφής. Ειδικότερα, χρησιμοποιήθηκαν τρεις μέθοδοι αντιστροφής δισδιάστατων δεδομένων (Least-Squares Inversion, Robust Inversion και Combined) και δύο λογισμικά (Res3Dinv) και (EarthImager3D) για την αντιστροφή των τρισδιάστατων γεωηλεκτρικών δεδομένων. Στην συνέχεια συγκρίθηκαν οι γεωηλεκτρικές τομές και προτάθηκε σαν πιο κατάλληλη μέθοδος αντιστροφής αυτή  πουελαχιστοποιεί την νόρμα L1 (Robust).
Η τρισδιάστατη αντιστροφή απεικόνισε πολύ υψηλής αντίστασης δομή, η οποία  σύμφωνα με τα γεωτρητικά δεδομένα και τις επιφανειακές παρατηρήσεις αποδίδεται σε έγκοιλο το οποίο πρέπει να ληφθεί υπόψη στον σχεδιασμό της θεμελίωσης των νέων κτιρίων του Κρατικού Αερολιμένα  Χανίων, ώστε να αποφευχθούν μελλοντικές αστοχίες.
Modelling the 2020 November 29 solar energetic particle event using the EUHFORIA and the iPATH model
Creators: name: Ding, Zheyi
name: Wijsen, Nicolas
name: Li, Gang
name: Poedts, Stefaan
Publisher: name: arXiv
Year: 2022
Subjects: subject: Space Physics (physics.space-ph)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present the implementation of coupling the EUropean Heliospheric FORcasting Information Asset (EUHFORIA) and the improved Particle Acceleration and Transport in the Heliosphere (iPATH) model and simulate the widespread solar energetic particle (SEP) event of 2020 November 29. We compare the simulated time intensity profiles with measurements at Parker Solar Probe (PSP), the Solar Terrestrial Relations Observatory (STEREO)-A, SOlar and Heliospheric Observatory (SOHO) and Solar Orbiter (SolO). We focus on the influence of the history of shock acceleration on the varying SEP time intensity profiles and investigate the underlying causes in the origin of this widespread SEP event. The temporal evolution of shock parameters and particle fluxes during this event are examined. We find that adopting a realistic solar wind background can significantly impact the expansion of the shock and consequently the shock parameters. Time intensity profiles with an energetic storm particle event at PSP are well reproduced from the simulation. In addition, the simulated and observed time intensity profiles of protons show a similar two-phase enhancement at STA. These results illustrate that modelling a shock using a realistic solar wind is crucial in determining the characteristics of SEP events. The decay phase of the modelled time intensity profiles at Earth agrees well with observations, indicating the importance of perpendicular diffusion in widespread SEP events. Taking into account the possible large curved magnetic field line connecting to SolO, the modelled time intensity profiles show good agreement with the observation. We suggest that the largely distorted magnetic field lines due to a stream interaction region may be a key factor in understanding the observed SEPs at SolO in this event.
description: 13 pages, 9 figures. Accepted for publication at A&A
Arm locking in conjunction with time-delay interferometry
Creators: name: Wang, Pan-Pan
name: Qian, Wei-Liang
name: Wu, Han-Zhong
name: Tan, Yu-Jie
name: Shao, Cheng-Gang
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: A crucial challenge to the ongoing endeavor of spaceborne gravitational wave (GW) detection resides in the laser phase noise, typically 7 to 8 orders of magnitude above the inevitable noise. The arm locking technique was proposed to suppress the noise in pre-stabilized laser beams. Based on the feedback control theory, it is implemented by appropriate design of the signal routing architecture, particularly the controllers' transfer functions. Theoretically and experimentally, the technique has been demonstrated to be capable of suppressing the laser phase noise by approximately 2-4 orders of magnitude while taking into account various aspects such as the gain and distribution of nulls in the Bode plot and the laser frequency pulling associated with the Doppler frequency subtraction. Consequently, the resultant noise floor is composed of the sources attributed to the clock jitter, optical bench motion, test mass fluctuations, shot-noise phase fluctuations at the photodetectors, whereas the magnitudes of these noises largely remain unchanged during the process. Besides, the original GW signals are deformed through the arm-locking control loop and therefore bear specific features governed by the associated arm-locking scheme. Nonetheless, the remaining laser phase noise from the arm-locking feedback routing settles within the capability threshold of the time-delay interferometry (TDI). In this regard, it is generally understood that the output of arm locking furnishes the input of TDI, through which the residual noise is further reduced to the desired level at a post-processing stage. In this work, we investigate the specific schemes regarding how the arm locking output is processed further by the TDI algorithm. Specific forms of the TDI combinations are derived in accordance with suppressed laser phase noise and deformed signals of GW.
Optimal Control Methods for Quantum Batteries
Creators: name: Mazzoncini, Francesco
name: Cavina, Vasco
name: Andolina, Gian Marcello
name: Erdman, Paolo Andrea
name: Giovannetti, Vittorio
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate the optimal charging processes for several models of quantum batteries, finding how to maximize the energy stored in a given battery with a finite-time modulation of a set of external fields. We approach the problem using advanced tools of optimal control theory, highlighting the universality of some features of the optimal solutions, for instance the emergence of the well-known Bang-Bang behavior of the time-dependent external fields. The technique presented here is general, and we apply it to specific cases in which the energy is both pumped into the battery by external forces (direct charging) or transferred into it from an external charger (mediated charging). In this article we focus on particular systems that consist of coupled qubits and harmonic oscillators, for which the optimal charging problem can be explicitly solved using a combined analytical-numerical approach based on our optimal control techniques. However, our approach can be applied to more complex setups, thus fostering the study of many-body effects in the charging process.
description: 17 pages, 5 figures
Laboratory and astronomical discovery of magnesium dicarbide, MgC$_2$
Creators: name: Changala, P. B.
name: Gupta, H.
name: Cernicharo, J.
name: Pardo, J. R.
name: Agúndez, M.
name: Cabezas, C.
name: Tercero, B.
name: Guélin, M.
name: McCarthy, M. C.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Atomic and Molecular Clusters (physics.atm-clus)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: We report the detection of magnesium dicarbide, MgC$_2$, in the laboratory at centimeter wavelengths and assign $^{24}$MgC$_2$, $^{25}$MgC$_2$, and $^{26}$MgC$_2$ to 14 unidentified lines in the radio spectrum of the circumstellar envelope of the evolved carbon star IRC+10216. The structure of MgC$_2$ is found to be T-shaped with a highly ionic bond between the metal atom and the C$_2$ unit, analogous to other dicarbides containing electropositive elements. A two-temperature excitation model of the MgC$_2$ emission lines observed in IRC+10216 yields a very low rotational temperature of $6\pm1$ K, a kinetic temperature of $22\pm13$ K, and a column density of $(1.0 \pm 0.3) \times 10^{12}$ cm$^{-2}$. The abundance of MgC$_2$ relative to the magnesium-carbon chains MgCCH, MgC$_4$H, and MgC$_6$H is $1{:}2{:}22{:}20$ and provides a new constraint on the sequential radiative association-dissociative recombination mechanisms implicated in the production of metal-bearing molecules in circumstellar environments.
description: 15 pages, 5 figures
WZW models as mutual super Poisson-Lie T-dual sigma models
Creators: name: Eghbali, A.
name: Rezaei-Aghdam, A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: A WZW model on the Lie supergroup (C3+A) is constructed. It is shown that this model contains super Poisson-Lie symmetry with the dual Lie supergroup C3 + A1,1|.i. Furthermore, we show that the dual model is also equivalent to the WZW model on isomorphic Lie supergroup (C3+A).i. In this manner, because of isomorphism of the (C3+A) with a Manin supertriple, it is shown that the N=(2,2) structure is preserved under the super Poisson-Lie T-duality transformation.
description: 12 pages
Suzanne Marwille
Creators: name: Šrajer, Martin
Publisher: name: Columbia University
Year: 2020
Subjects: Women in the motion picture industry
Motion pictures
Silent films
Screenwriters

description: To date, there are only about ten women screenwriters known to have worked in the Czech silent film industry. Some of them are more famous today as actresses, directors, or entrepreneurs. This is certainly true of Suzanne Marwille, who is considered to be the first Czech female film star. Less known is the fact that she also had a talent for writing, as well as dramaturgy and casting. Between 1918 and 1937, she appeared in at least forty films and wrote the screenplays for eight of them.
On arithmetic progressions on Edwards curves
Creators: name: Gonzalez-Jimenez, Enrique
Publisher: name: arXiv
Year: 2013
Subjects: subject: Number Theory (math.NT)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: Primary: 11G05, 11G30, Secondary: 11B25, 11D45, 14G05

description: Let m be a positive integer and a,q two rational numbers. Denote by AP_m(a,q) the set of rational numbers d such that a,a+q,...,a+(m-1)q form an arithmetic progression in the Edwards curve E_d:x^2+y^2=1+d x^2 y^2. We study the set AP_m(a,q) and we parametrize it by the rational points of an algebraic curve.
Particle and thermal transport through one dimensional topological systems via Lindblad formalism
Creators: name: He, Yan
name: Chien, Chih-Chun
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We apply the Lindblad quantum master equation to two examples of one-dimensional topological systems, the Su-Schrieffer-Heeger (SSH) model and Kitaev chain, to study their particle and thermal transport. The steady-state properties are obtained by decomposing fermions into Majorana fermions and extracting their correlation functions. We focus on the particle and thermal currents flowing through the bulk when the system is driven by two reservoirs coupled to the two ends. The ratio of the currents of the SSH model from the topological and trivial regimes with the same bandwidth demonstrates suppression of transport due to the edge states, which couple to the reservoirs but do not participate in transport. A similar comparison cannot be performed for the Kitaev chain because the topological and trivial regimes have different bandwidths, and the edge states are less significant away from the transition. Therefore, the results contrast various topological properties in quantum transport.
description: 11 pages, 5 figures
It's not just what you say: Relationships of HIV dislosure and risk reduction among MSM in the post-HAART era
Creators: name: Klitzman, Robert L.
name: Exner, Theresa M.
name: Correale, J.
name: Kirshenbaum, S. B.
name: Remien, Robert Howard
name: Ehrhardt, Anke A.
name: Lightfoot, M.
name: Catz, S. L.
name: Weinhardt, L.S.
name: Johnson, M. O.
name: Morin, S. F.
name: Rotheram-Borus, M. J.
name: Kelly, J. A.
name: Charlebois, E.
Publisher: name: Columbia University
Year: 2007
Subjects: Self-disclosure--Health aspects
HIV infections—Prevention
HIV infections--Social aspects
HIV-positive men
Public health

description: In the post-HAART era, critical questions arise as to what factors affect disclosure decisions and how these decisions are associated with factors such as high-risk behaviors and partner variables. We interviewed 1,828 HIV-positive men who have sex with men (MSM), of whom 46% disclosed to all partners. Among men with casual partners, 41.8% disclosed to all of these partners and 21.5% to none. Disclosure was associated with relationship type, perceived partner HIV status and sexual behaviors. Overall, 36.5% of respondents had unprotected anal sex (UAS) with partners of negative/unknown HIV status. Of those with only casual partners, 80.4% had >1 act of UAS and 58% of these did not disclose to all partners. This 58% were more likely to self-identify as gay (versus bisexual), be aware of their status for <5 years and have more partners. Being on HAART, viral load and number of symptoms were not associated with disclosure. This study—the largest conducted to date of disclosure among MSM and one of the few conducted post-HAART—indicates that almost 1/5th reported UAS with casual partners without disclosure, highlighting a public health challenge. Disclosure needs to be addressed in the context of relationship type, partner status and broader risk-reduction strategies.
Datirte Grabmäler des Mittelalters in den Rheinlanden
Creators: name: Eltester, Leopold Von
Publisher: name: Bonner Jahrbücher
Year: 2017

description: [nicht vorhanden / not available]
description: Bonner Jahrbücher, Bd. 60 (1877): Jahrbücher des Vereins von Alterthumsfreunden im Rheinlande
title: Συμβολή της ηλεκτρικής τομογραφίας στην εκτίμηση του πάχους του εδαφικού καλύματος στο λατομείο Λούτσα Ρέμερι, Νομού Βοιωτίας
Creators: name: Καραπτας Βασιλειος
Publisher: name: Technical University of Crete
Year: 2016

description: Η εργασία αυτή αναφέρεται στην εφαρμογή της μεθόδου της ηλεκτρικής τομογραφίας για στρωματογραφικό έλεγχο στον λατομικό χώρο “ΛΟΥΤΣΑ ΡΕΜΕΡΙ” Δ.Δ. Σκουρτών, Δήμου Δερβενοχωρίων, Ν. Βοιωτίας. Η πόλγη των Σκουρτών είναι πληρωμένη με αργιλικό υλικό το οποίο αποτελεί την πρώτη ύλη στην τσιμεντοβιομηχανία.
Δίπλα στον χώρο εξόρυξης του λατομείου πραγματοποιήθηκαν μετρήσεις ηλεκτρικής τομογραφίας  βόρεια και ανατολικά. Διασκοπήθηκαν συνολικά 14 γραμμές μήκους 270 μ και 370 μ με τις διατάξεις διπόλου –διπόλου, Gradient και Wenner-Schlumberger. H επεξεργασία των μετρήσεων που παρουσιάζονται στην παρούσα εργασία, πραγματοποιήθηκε με τα  λογισμικά Res2Dinv και RockWorks.

Aπό τη ηλεκτρική διασκόπηση προέκυψαν 2 γεωηλεκτρικά στρώματα. Το πρώτο χαρακτηρίζεται από ανομοιογένεια (ειδική ηλεκτρική αντίσταση από 5-20 Ωm) και αποδίδεται σε Terra Rosa κοντά στην επιφάνεια του εδάφους. To δεύτερo, με  ειδική ηλεκτρική αντίσταση μεγαλύτερη από 70 Ωm, αποδίδεται σε καρστικούς ανθρακικούς σχηματισμούς. Το πάχος των υπερκείμενων του ανθρακικού υποβάθρου σχηματισμών στις θέσεις διασκόπησης στην πόλγη των Σκουρτών κυμαίνεται από 20- 50 μέτρα.
title: Αξιολόγηση ασφαλτούχων σχηματισμών (tar sands) της Νιγηρίας με γεωχημικές μεθόδους
Creators: name: Κωνσταντινοπουλος Μιλτιαδης
Publisher: name: Technical University of Crete
Year: 2016

description: Στη παρούσα διπλωματική εργασία πραγματοποιείται οργανική γεωχημική ανάλυση 18 επιφανειακών δειγμάτων ασφαλτούχων άμμων από τη νοτιοδυτική πλευρά της Νιγηρίας με στόχο τον προσδιορισμό της ποιότητας και ποσότητας της οργανικής ύλης, τη συσχέτιση των δειγμάτων μεταξύ τους και τον εντοπισμό στοιχείων προέλευσης τους.
Ειδικότερα, το οργανικό υλικό εκχυλίστηκε από τα δείγματα και αναλύθηκε με υγρή χρωματογραφία ανοικτής στήλης. Το κορεσμένο κλάσμα που συλλέχθηκε, αναλύθηκε περαιτέρω με αέρια χρωματογραφία-φασματοσκοπία μάζας. Από τα πειραματικά αποτελέσματα υπολογίστηκαν συγκεκριμένοι γεωχημικοί δείκτες χαρακτηριστικοί της ποιότητας και ποσότητας της οργανικής ύλης, της προέλευσης της και των συνθηκών εναπόθεσής της.
Διαπιστώθηκε ότι τα δείγματα μπορούν να χωριστούν σε δύο οικογένειες κυρίως με βάση το βαθμό βιοαποδόμησης της οργανικής ύλης. Στην πρώτη οικογένεια η προέλευση εκτιμάται κυρίως χερσαίας συνεισφοράς και η οργανική ύλη χαρακτηρίζεται ως ανώριμη. Για τα δείγματα της δεύτερης οικογένειας προκύπτει ότι έχουν υποστεί έντονα τη διεργασία της βιοαποδόμησης, η προέλευση τους εκτιμάται συνδυασμός χερσαίας και θαλάσσιας συνεισφοράς  και η οργανική ύλη χαρακτηρίζεται υψηλής ωριμότητας.
Two-step devitrification of ultrastable glasses
Creators: name: Herrero, Cecilia
name: Scalliet, Camille
name: Ediger, M. D.
name: Berthier, Ludovic
Publisher: name: arXiv
Year: 2022
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: The discovery of ultrastable glasses has raised novel challenges about glassy systems. Recent experiments studied the macroscopic devitrification of ultrastable glasses into liquids upon heating but lacked microscopic resolution. We use molecular dynamics simulations to analyse the kinetics of this transformation. In the most stable systems, devitrification occurs after a very large time, but the liquid emerges in two steps. At short times, we observe the rare nucleation and slow growth of isolated droplets containing a liquid maintained under pressure by the rigidity of the surrounding glass. At large times, pressure is released after the droplets coalesce into large domains, which accelerates devitrification. This two-step process produces pronounced deviations from the classical Avrami kinetics and explains the emergence of a giant lengthscale characterising the devitrification of bulk ultrastable glasses. Our study elucidates the nonequilibrium kinetics of glasses following a large temperature jump, which differs from both equilibrium relaxation and aging dynamics, and will guide future experimental studies.
Peter Baumeister, Der Fries des Hekateions von Lagina. Neue Untersuchungen zu Monument und Kontext
Creators: name: Flashar, Martin
Publisher: name: Bonner Jahrbücher
Year: 2017

description: Rezension zu: Peter Baumeister, Der Fries des Hekateions von Lagina. Neue Untersuchungen zu Monument und Kontext. Byzas, Band 6. Verlag ege Yayınları im Vertrieb der Zero Books, Istanbul 2007. X und 252 Seiten, 43 Tafeln, 2 Beilagen
description: Bonner Jahrbücher, Bd. 208.2008(2010): Bonner Jahrbücher
Cosmological-model-independent determination of Hubble constant from fast radio bursts and Hubble parameter measurements
Creators: name: Liu, Yang
name: Yu, Hongwei
name: Wu, Puxun
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We establish a cosmological-model-independent method to determine the Hubble constant $H_0$ from the localized fast radio bursts (FRBs) and the Hubble parameter measurements from cosmic chronometers and obtain a first such determination $H_0=71\pm 3~\mathrm{km/s/Mpc}$, with an uncertainty of 4\%, from the eighteen localized FRBs and nineteen Hubble parameter measurements in the redshift range $0
description: 12 pages, 2 figures. To appear in ApJL
title: Προσδιορισμός ιδιοτήτων χρώματος πληρωτικών υλικών και κονιαμάτων
Creators: name: Νανου Μαρια
Publisher: name: Technical University of Crete
Year: 2016

description: Το χρώμα αποτελεί μια από τις πιο βασικές παραμέτρους για τη χρήση των  ανθρακικών πετρωμάτων στον τομέα της βιομηχανίας. Είναι γνωστό ότι όσο πιο λευκό είναι ένα ανθρακικό πέτρωμα  τόσο πιο συμφέρουσα είναι η εκμετάλλευσή του λόγω της καθαρότητας του.
Στην παρούσα διπλωματική επιλέχθηκαν 11 ανθρακικά δείγματα από διαφορετικές περιοχές της Ελλάδας, στα οποία αφότου εξετάστηκε η χημική και ορυκτολογική σύσταση, μελετήθηκε η μεταβολή των χρωματικών παραμέτρων μετά την έψησή τους καθώς και μετά την προσθήκη σε αυτά, πολύ μικρών ποσοτήτων χρωστικών ουσιών, αιματίτη και γραφίτη.
Η ορυκτολογική και χημική ανάλυση πραγματοποιήθηκε με τη χρήση περιθλασίμετρου ακτίνων-Χ(XRD) και φασματόμετρου ακτίνων-Χ φθορισμού (XRF) αντίστοιχα. Τα αποτελέσματα των αναλύσεων έδειξαν πως τα δείγματα μας είναι υψηλής καθαρότητας, αποτελούνται κατά κύριο λόγο από CaO λόγω της παρουσίας ασβεστίτη, έπειτα από MgO λόγω της παρουσίας δολομίτη και μικρές ποσότητες προσμίξεων.
Οι χρωματικές παράμετροι προσδιορίστηκαν με τη χρήση επιτραπέζιο φασματοφωτόμετρου CM-5, της εταιρίας Conical Minolta, σύμφωνα με το σύστημα CIE με παραμέτρους L, a, b, ενώ υπολογίστηκε η απόκλιση από το τέλειο λευκό ΔΕ* ab.
Αρχικά μετρήθηκαν οι χρωματικές παράμετροι των ανθρακικών δειγμάτων, σύμφωνα με τις οποίες τα δείγματα παρουσιάζουν μικρή απόκλιση από τις τιμές του τέλειου λευκού γεγονός που αποδεικνύει πως τα δείγματα μας είναι αρκετά λευκά άρα μπορούν να χρησιμοποιηθούν ως πληρωτικά υλικά. Στη συνέχεια πραγματοποιήθηκε η μέτρηση των χρωματικών  παραμέτρων των ανθρακικών δειγμάτων μετά την έψησή τους, δίνοντας ακόμα μεγαλύτερες τιμές φωτεινότητας σε σύγκριση με τις αρχικές και μικρότερη απόκλιση των τιμών του τέλειου λευκού, Συμπεραίνουμε λοιπόν ότι μετά την έψηση τους τα δείγματα έγιναν ακόμα πιο λευκά.
Στη συνέχεια επιλέχθηκε το δείγμα Α1 της εταιρίας Ionian Calc , από την περιοχή της Κεφαλονιάς, λόγω της λευκότητας και της υψηλής καθαρότητας του, το οποίο αναμείχθηκε με πολύ μικρές ποσότητες αιματίτη και γραφίτη και διαπιστώθηκε πως επηρεάζονται οι χρωματικές παράμετροι ακόμα και αν δεν είναι ορατό με γυμνό μάτι, γεγονός που μπορεί να οδηγήσει στην πρόβλεψη των χρωματικών ιδιοτήτων των ανθρακικών πετρωμάτων.
Cosmic evolution of the incidence of Active Galactic Nuclei in massive clusters: Simulations versus observations
Creators: name: Rodríguez, Iván Muñoz
name: Georgakakis, Antonis
name: Shankar, Francesco
name: Allevato, Viola
name: Bonoli, Silvia
name: Brusa, Marcella
name: Lapi, Andrea
name: Viitanen, Akke
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: This paper explores the role of small-scale environment ($<1$ Mpc) in modulating accretion events onto supermassive black holes by studying the incidence of Active Galactic Nuclei (AGN) in massive clusters of galaxies. A flexible, data-driven semi-empirical model is developed based on a minimal set of parameters and under the zero order assumption that the incidence of AGN in galaxies is independent of environment. This is used to predict how the fraction of X-ray selected AGN among galaxies in massive dark matter halos ($\gtrsim 3\times 10^{14}\,M_{\odot}$) evolves with redshift and reveal tensions with observations. At high redshift, $z\sim1.2$, the model underpredicts AGN fractions, particularly at high X-ray luminosities, $L_X(\rm 2-10\,keV) \gtrsim 10^{44}\, erg \, s^{-1}$. At low redshift, $z\sim0.2$, the model estimates fractions of moderate luminosity AGN ($L_X(\rm 2-10\,keV) \gtrsim 10^{43}\, erg \, s^{-1}$) that are a factor of $2-3$ higher than the observations. These findings reject the zero order assumption on which the semi-empirical model hinges and point to a strong and redshift-dependent influence of the small-scale environment on the growth of black holes. Cluster of galaxies appear to promote AGN activity relative to the model expectation at $z\sim1.2$ and suppress it close to the present day. These trends could be explained by the increasing gas content of galaxies toward higher redshift combined with an efficient triggering of AGN at earlier times in galaxies that fall onto clusters.
description: Accepted in Monthly Notices of the Royal Astronomical Society
Generative Retrieval as Dense Retrieval
Creators: name: Nguyen, Thong
name: Yates, Andrew
Publisher: name: arXiv
Year: 2023
Subjects: subject: Information Retrieval (cs.IR)
subject: FOS: Computer and information sciences

description: Generative retrieval is a promising new neural retrieval paradigm that aims to optimize the retrieval pipeline by performing both indexing and retrieval with a single transformer model. However, this new paradigm faces challenges with updating the index and scaling to large collections. In this paper, we analyze two prominent variants of generative retrieval and show that they can be conceptually viewed as bi-encoders for dense retrieval. Specifically, we analytically demonstrate that the generative retrieval process can be decomposed into dot products between query and document vectors, similar to dense retrieval. This analysis leads us to propose a new variant of generative retrieval, called Tied-Atomic, which addresses the updating and scaling issues by incorporating techniques from dense retrieval. In experiments on two datasets, NQ320k and the full MSMARCO, we confirm that this approach does not reduce retrieval effectiveness while enabling the model to scale to large collections.
description: GenIR@SIGIR2023
Role of weak measurements on states ordering and monogamy of quantum correlation
Creators: name: Hu, Ming-Liang
name: Fan, Heng
name: Tian, Dong-Ping
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The information-theoretic definition of quantum correlation, e.g., quantum discord, is measurement dependent. By considering the more general quantum measurements, weak measurements, which include the projective measurement as a limiting case, we show that while weak measurements can enable one to capture more quantumness of correlation in a state, it can also induce other counterintuitive quantum effects. Specifically, we show that the general measurements with different strengths can impose different orderings for quantum correlations of some states. It can also modify the monogamous character for certain classes of states as well which may diminish the usefulness of quantum correlation as a resource in some protocols. In this sense, we say that the weak measurements play a dual role in defining quantum correlation.
description: 6 pages, 5 figures, the final version as that published in Int. J. Theor. Phys
MAKTABGACHA YOSHGDAGI BOLALARDA EKOLOGIK DUNYOQARASHNI SHAKLLANTIRISH MUOMMOLARI
Creators: name: Suyunova, Matluba
Publisher: name: Zenodo
Year: 2023

description: Ilmiy maqola maktabgacha yoshdagi bolalarda ekologik dunyoqarashni shakllantirish bilan bog'liq muammolarni tahlil qilishga bag'ishlangan. Maqolada erta bolalik davrida ekologik ongni rivojlantirishga ta'sir qiluvchi asosiy jihatlar ko'rib chiqiladi. Tadqiqot zamonaviy adabiyotlar va empirik ma'lumotlarni ko'rib chiqish, shuningdek, maktabgacha ta'lim tashkilotlarida   pedagogik amaliyotni joriy etish tajribasiga asoslangan.
Two-dimensional rare-earth Janus 2$\textit{H}$-Gd$\textit{XY}$ ($\textit{X}$,$\textit{Y}$=Cl, Br, I, $\textit{X}$$\neq$$\textit{Y}$) monolayers: Bipolar ferro-magnetic semiconductors with high Curie temperature and large valley polarization
Creators: name: Li, Cunquan
name: An, Yukai
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Two-dimensional (2D) ferromagnetic semiconductors show great interest due to their potential applications for the nanoscale electronic devices. In this work, the Janus 2$H$-Gd$XY$ ($X$, $Y$=Cl, Br, I, $X$$\neq$$Y$) monolayers with rare-earth element Gd (4$f^{7}$+5$d^{1}$) are predicted by the first-principles calculations. Small exfoliation energy of less than 0.25 J/m$^{2}$ and excellent dynamical/thermal stabilities can be confirmed for the Janus 2$H$-Gd$XY$ monolayers, which exhibit the bipolar magnetic semiconductor character with high Curie temperatures above 260 K and large spin-orbit coupling effect, and can be further transformed into the half-semiconductor phase under proper tensile strains (5-6\%). In addition, the in-plane magnetic anisotropy can be observed in the 2$H$-GdICl and 2$H$-GdIBr monolayers. On the contrary, the 2$H$-GdBrCl monolayer exhibits perpendicular magnetic anisotropy character, which originates from the competition between Gd-$p$/$d$ and halogen atom-$p$ orbitals. Calculated valley optical actions of the Janus 2$H$-Gd$XY$ monolayers exhibit distinguished valley-selective circular dichroisms, which is expected to realize the special valley excitation by polarized light. Spontaneously valley-Zeeman effect in the valance band for the Janus 2$H$-Gd$XY$ monolayers induces a giant valley splitting of 60-120 meV, which is also robust against various external biaxial strains. Tunable valley degree of freedom in the Janus 2$H$-Gd$XY$ systems is very necessary for encoding and processing information.
description: 8 pages, 8 figures
A Book of Conquest: The Chachnama and Muslim Origins in South Asia
Creators: name: Ahmed Asif, Manan
Publisher: name: Columbia University
Year: 2016
Subjects: Islam
Islam--Historiography
History

description: The question of how Islam arrived in India remains markedly contentious in South Asian politics. Standard accounts center on the Umayyad Caliphate’s incursions into Sind and littoral western India in the eighth century CE. In this telling, Muslims were a foreign presence among native Hindus, sowing the seeds of a mutual animosity that presaged the subcontinent’s partition into Pakistan and India many centuries later. But in a compelling reexamination of the history of Islam in India, Manan Ahmed Asif directs attention to a thirteenth-century text that tells the story of Chach, the Brahmin ruler of Sind, and his kingdom’s later conquest by the Muslim general Muhammad bin Qasim in 712 CE. The Chachnama has long been a touchstone of Indian history, yet it is seldom studied in its entirety. Asif offers a close and complete analysis of this important text, untangling its various registers and genres in order to reconstruct the political vision at its heart.