cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: Στατιστικές μέθοδοι για συστήματα φωνητικού διαλόγου
title: Statistical methods for dialogue systems
Creators: name: Γεωργιαδου Δεσποινα
Publisher: name: Technical University of Crete
Year: 2017

description: Η αυτόματη κατανόηση της ομιλίας περιλαμβάνει μια σειρά από διαδικασίες. Ανάμεσα τους μία από τις κυριότερες και πιο δύσκολες είναι η εξαγωγή σημαντικής πληροφορίας (slot-filling). Τα τελευταία χρόνια, οι καλύτερες προσεγγίσεις σε αυτόν τον τομέα βασίζονται σε νευρωνικά δίκτυα με ανατροφοδότηση (RNNs). Ωστόσο, όταν χρησιμοποιούνται στην απλούστερη μορφή τους τα RNNs, δεν μπορούν να μάθουν αποδοτικά τις εξαρτήσεις που υπάρχουν σε μεγάλες χρονικά αποστάσεις στα δεδομένα. Σε αυτή την εργασία,
προτείνουμε τη χρήση αρχιτεκτονικών ClockWork νευρωνικών δικτύων με ανατροφοδότηση (CW-RNN) για τη διαδικασία του slot-filling. Το CW-RNN είναι μια παραλλαγή της αρχιτεκτονικής RNN στην οποία εφαρμόζονται πολλαπλοί χρονισμοί στην ανατροφοδότηση συγκεκριμένων ομάδων από νευρώνες. Η
αρχιτεκτονική CW-RNN έχει αποδειχθεί ότι είναι πολύ αποδοτική παρότι διατηρεί σχετικά μικρή πολυπλοκότητα. Επιπλέον, το CW-RNN έχει εγγενώς πολύ μεγαλύτερη ικανότητα να μοντελοποιεί εξαρτήσεις σε χρονικά μεγάλες αποστάσεις. Για τα πειράματά μας με την αρχιτεκτονική CW-RNN επιλέξαμε τα δεδομένα
αναφοράς από το Air Travel Information System (ATIS). Παράλληλα προτείνουμε αρκετές καινοτόμες εκδοχές του CW-RNN και διαπιστώνουμε ότι υπερτερούν σημαντικά των απλών RNN αφού επιτυγχάνουν σημαντικά καλύτερα αποτελέσματα, διατηρώντας ταυτόχρονα μικρότερη πολυπλοκότητα.
description: A prevalent and challenging task in spoken language understanding is slot filling. Currently, the best approaches in this domain are based on recurrent neural networks (RNNs). However, in their simplest form, RNNs cannot learn long-term dependencies in the data. In this work, we propose the use of ClockWork recurrent neural network (CW-RNN) architectures in the slot-filling domain. CW-RNN is a multi-timescale implementation of the simple RNN rchitecture, which has proven to be powerful since it maintains relatively
small model complexity. In addition, CW-RNN exhibits a great ability to model long-term memory inherently. In our experiments on the ATIS benchmark data set, we also evaluate several novel variants of CW-RNN and we find that they significantly outperform simple RNNs and they achieve results among the state-of- the-art, while retaining smaller complexity.
Observation of a new boson with mass near 125 GeV in pp collisions at sqrt(s) = 7 and 8 TeV
Creators: name: CMS Collaboration
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: A detailed description is reported of the analysis used by the CMS Collaboration in the search for the standard model Higgs boson in pp collisions at the LHC, which led to the observation of a new boson. The data sample corresponds to integrated luminosities up to 5.1 inverse femtobarns at sqrt(s) = 7 TeV, and up to 5.3 inverse femtobarns at sqrt(s) = 8 TeV. The results for five Higgs boson decay modes gamma gamma, ZZ, WW, tau tau, and bb, which show a combined local significance of 5 standard deviations near 125 GeV, are reviewed. A fit to the invariant mass of the two high resolution channels, gamma gamma and ZZ to 4 ell, gives a mass estimate of 125.3 +/- 0.4 (stat) +/- 0.5 (syst) GeV. The measurements are interpreted in the context of the standard model Lagrangian for the scalar Higgs field interacting with fermions and vector bosons. The measured values of the corresponding couplings are compared to the standard model predictions. The hypothesis of custodial symmetry is tested through the measurement of the ratio of the couplings to the W and Z bosons. All the results are consistent, within their uncertainties, with the expectations for a standard model Higgs boson.
description: Replaced with published version. Added journal reference and DOI
title: Design and comparison of machine learning and computer vision methods in face recognition
Creators: name: Μπαντουρακης Στυλιανος
Publisher: name: Technical University of Crete
Year: 2017

description: Τα τελευταία χρόνια, τα συστήματα αναγνώρισης προσώπου έχουν γίνει πιο δημοφιλή στο ευρύ κοινό λόγω της χρήσης τους σε smartphones και μέσα κοινωνικής δικτύωσης. Την ίδια στιγμή, ο τομέας της αναγνώρισης εικόνας ανθεί ακόμα περισσότερο λόγω της επαναφοράς των νευρωνικών δικτύων στο προσκήνιο, με τη μορφή των «βαθιών» νευρωνικών δικτύων (deep neural networks – deep learning). Έτσι, είναι επιτακτική η ανάγκη για τη μελέτη και κατανόηση των συνεπειών τους σε υποτομείς της αναγνώρισης εικόνας, όπως είναι η αναγνώριση προσώπου. Σε αυτή την εργασία, εξετάζουμε και τις κλασικές μεθόδους αλλά και το state-of-the-art, τo deep learning, για να αποκτήσουμε πλήρη και σφαιρική εικόνα της περιοχής. Πιο συγκεκριμένα, οι μέθοδοι Principal Component Analysis (PCA), Linear Discriminant Analysis (LDA) και Independent Component Analysis (ICA) εξετάστηκαν χρησιμοποιώντας όμως ως ένα επιπλέον στάδιο προ-επεξεργασίας τον Discrete Wavelet Transform (DWT). Αυτός ο προτεινόμενος συνδυασμός της αποσύνθεσης μέσω κυματιδίων για την εξαγωγή χαρακτηριστικών και της στατιστικής οργάνωσης για τη μείωση των χαρακτηριστικών αποδεικνύεται ως μια αποδοτική οδός στην αναγνώριση προσώπου. Ο DWT έχει ήδη ισχυρή παρουσία στον τομέα της ψηφιακής επεξεργασίας εικόνας, καθώς πάνω του βασίζεται το πρότυπο συμπίεσης JPEG, αλλά παράλληλα και στον τομέα της ασφάλειας μέσω των εφαρμογών της στεγανογραφίας. Όσον αφορά το deep learning, εξετάσαμε τη σύγχρονη προσέγγιση του transfer learning, δηλαδή της επαναχρησιμοποίησης ήδη εκπαιδευμένων σε πολύ μεγάλα datasets deep neural networks. Χρησιμοποιήσαμε ένα δίκτυο που έχει επιτύχει υψηλές αποδόσεις και εκπαιδευτεί σε ένα dataset διαφορετικό από το δικό μας και πήραμε υψηλά ποσοστά επιτυχίας, επιβεβαιώνοντας ότι τα deep neural networks είναι το μέλλον του τομέα. Επιπρόσθετα, προσπαθήσαμε μια εννοιολογική συσχέτιση μεταξύ των δύο μεθοδολογιών που εξετάσαμε, την κλασική μεθοδολογία βασισμένη πάνω σε σαφείς στατιστικές έννοιες και το deep learning όπου τα δομικά στοιχεία ενός δικτύου χρησιμοποιούνται ως «μαύρα κουτιά». Μέσω της μελέτης μας, μπορούμε να παρέχουμε στέρεες συσχετίσεις που επιτρέπουν την αιτιολόγηση της χρήσης των δομικών αυτών στοιχείων.
Correlative studies on the fabrication of poly(styrene-methyl-methacrylate-acrylic acid) colloidal crystal films
Creators: name: Ifijen, Hilary I.
name: Ikhuoria, Esther U.
name: Omorogbe, Stanley O.
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Biophysics
subject: Biochemistry
subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Cell Biology
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: FOS: Biological sciences
subject: Inorganic Chemistry
subject: 60506 Virology

description: This research describes a one-step procedure for monodispersed poly(styrene-methyl-methacrylate-acrylic acid colloidal spheres [P(St-MMA-AA)] via soap-seeded emulsion polymerization. The effects ofreaction conditions such as temperature, stirring speed, initiation concentration, e.t.c. were examined. The results obtained showed that the spheres average particle diameter decreased with increase in initiator concentration, the reaction temperature and stirring speed and increased with an increase in monomer concentrations. The particles show stable mechanical properties within the transition and heating temperatures of 111.9 °C and 388 °C respectively. Zeta-potential values ranging from −31.8 mV to −36.5 mV which is indicative of stable dispersion of colloidal particles were obtained for all the prepared latexes. The assembled colloidal latex had periodic structures with mainly hexagonal three-dimensional structures with multi-facet arrangements. The latex also shows spherical shape of monodispersed core-shell particles.
Ground-Air Interface: The Loess Sequences, Markers of Atmospheric Circulation
Creators: name: Rousseau, Denis-Didier
name: Hatté, Christine
Publisher: name: Columbia University
Year: 2020
Subjects: Atmospheric circulation
Paleoclimatology
Climatic changes
Loess
Dust

description: Atmospheric circulation is responsible for the rapid distribution of heat and moisture across the Earth and hence determines our weather and regional climate, today and in the past. During past climate cycles, the atmosphere has been much more dustier, except during the interglacials, inducing uncertainties about the impact of mineral aerosols on the past climate dynamics. There are abundant traces of the combination of past atmospheric dynamics and paleodust cycle such as eolian mineral material transported and deposited in terrestrial archives as loess. Records from loess deposits consistently suggest that atmospheric dynamics was highly variable, during the past climate cycles, much more than presently where the only sources of dust are the major deserts. In this chapter we explained the four main categories of parameters allowing to identify loess deposits as reliable markers for past air circulation.
A potent voltage-gated calcium channel inhibitor engineered from a nanobody targeted to auxiliary CaVβ subunits
Creators: name: Morgenstern, Travis James
name: Park, Jinseo
name: Fan, Qing R.
name: Colecraft, Henry M.
Publisher: name: Columbia University
Year: 2019
Subjects: Pharmacology
Calcium channels
Calcium--Antagonists

description: Inhibiting high-voltage-activated calcium channels (HVACCs; CaV1/CaV2) is therapeutic for myriad cardiovascular and neurological diseases. For particular applications, genetically-encoded HVACC blockers may enable channel inhibition with greater tissue-specificity and versatility than is achievable with small molecules. Here, we engineered a genetically-encoded HVACC inhibitor by first isolating an immunized llama nanobody (nb.F3) that binds auxiliary HVACC CaVβ subunits. Nb.F3 by itself is functionally inert, providing a convenient vehicle to target active moieties to CaVβ-associated channels. Nb.F3 fused to the catalytic HECT domain of Nedd4L (CaV-aβlator), an E3 ubiquitin ligase, ablated currents from diverse HVACCs reconstituted in HEK293 cells, and from endogenous CaV1/CaV2 channels in mammalian cardiomyocytes, dorsal root ganglion neurons, and pancreatic β cells. In cardiomyocytes, CaV-aβlator redistributed CaV1.2 channels from dyads to Rab-7-positive late endosomes. This work introduces CaV-aβlator as a potent genetically-encoded HVACC inhibitor, and describes a general approach that can be broadly adapted to generate versatile modulators for macro-molecular membrane protein complexes.
Observation of the Spatial Distribution of Gravitationally Bound Quantum States of Ultracold Neutrons and Its Derivation Using the Wigner Function
Creators: name: Ichikawa, G.
name: Komamiya, S.
name: Kamiya, Y.
name: Minami, Y.
name: Tani, M.
name: Geltenbort, P.
name: Yamamura, K.
name: Nagano, M.
name: Sanuki, T.
name: Kawasaki, S.
name: Hino, M.
name: Kitaguchi, M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: Ultracold neutrons (UCNs) can be bound by the potential of terrestrial gravity and a reflecting mirror. The wave function of the bound state has characteristic modulations. We carried out an experiment to observe the vertical distribution of the UCNs above such a mirror at Institut Laue-Langevin in 2011. The observed modulation is in good agreement with that prediction by quantum mechanics using the Wigner function. The spatial resolution of the detector system is estimated to be 0.7 micro meter. This is the first observation of gravitationally bound states of UCNs with submicron spatial resolution.
description: 5 pages, 3 figures
Machine learning the nuclear mass
Creators: name: Gao, Zepeng
name: Wang, Yongjia
name: Lü, Hongliang
name: Li, Qingfeng
name: Shen, Caiwan
name: Liu, Ling
Publisher: name: arXiv
Year: 2021
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Background: The masses of about 2500 nuclei have been measured experimentally, however more than 7000 isotopes are predicted to exist in the nuclear landscape from H (Z=1) to Og (Z=118) based on various theoretical calculations. Exploring the mass of the remains is a hot topic in nuclear physics. Machine learning has been served as a powerful tool in learning complex representations of big data in many fields. Purpose: We use Light Gradient Boosting Machine (LightGBM) which is a highly efficient machine learning algorithm to predict the masses of unknown nuclei and to explore the nuclear landscape in neutron-rich side from learning the measured nuclear masses. Results: By using the experimental data of 80 percent of known nuclei as the training dataset, the root mean square deviation (RMSD) between the predicted and the experimental binding energy of the remaining 20% is about 0.234 MeV, 0.213 MeV, 0.170 MeV, and 0.222 MeV for the LightGBM-refined LDM, DZ, WS4, and FRDM models, respectively. These values are of about 90%, 65%, 40%, and 60% smaller than the corresponding origin mass models. The RMSD for 66 newly measured nuclei that appeared in AME2020 is also significantly improved on the same foot. One-neutron and two-neutron separation energies predicted by these refined models are in consistence with several theoretical predictions based on various physical models. Conclusions: LightGBM can be used to refine theoretical nuclear mass models so as to predict the binding energy of unknown nuclei. Moreover, the correlation between the input characteristic quantities and the output can be interpreted by SHapley Additive exPlanations (SHAP, a popular explainable artificial intelligence tool), this may provide new insights on developing theoretical nuclear mass models.
title: Modeling of hybrid operation of a concentrated solar power production unit
title: Μοντελοποίηση υβριδικής λειτουργίας ηλιοθερμικού σταθμού παραγωγής ηλεκτρικής ενέργειας
Creators: name: Μπρελλας Κωνσταντινος
Publisher: name: Technical University of Crete
Year: 2017

description: Concentrated Solar Power (CSP) plants are Renewable Energy Source (RES) units that gain popularity in countries with high solar radiation. CSP plants have already been installed in countries of South Europe and in the Middle East and North Africa, where relevant regulating environment has been developed. The key elements of such legislative frameworks are reviewed in this thesis. Solar dish-Stirling technology is CSP technology that can be more easily integrated into Distribution networks due to its small size. However, a disadvantage of this technology is that features shorter thermal inertia and thus, its output is more volatile compared to large scale CSP plants.
In this thesis, the injection to the grid of a solar dish-Stirling plant connected to a battery bank forming a Hybrid plant is studied, in order to determine up to what extent the production volatility and ‘duck curve’ reduction can be achieved. A modeling approach of the electricity output of a solar dish system combined with a lithium-ion battery, is developed. A methodology based on the minimization of the mean square error between the actual and the proposed stabilized production is presented, in order to optimally size the battery bank and reduce the power production volatility of the CSP. Also a methodology is developed to tackle with the ‘duck curve’ effect in providing capacity of 15% and 30% of the nominal power two hours after sunset.
Results from the operation of such a Hybrid plant for typical days of various seasons on the island of Crete prove the capability of such a configuration to provide guaranteed amount of power, along with the addition of volatility decrease and capacity credit. To foster such an operation, the principles for suggesting a new premium Feed-in Tariff system to aid the remuneration of power production at various amount of capacity credit providing 2 hours after sunset are suggested. Such a scheme takes into account the battery capacity of the Hybrid CSP, the capacity credit provided and also has a relative dependence of the fuel price used by the most expensive conventional unit. The suggested FiT acts as an additional premium remuneration alongside the remuneration for power production, to the producers that provide capacity credit to the grid, justified also by the economic benefits achieved. The Calculation of these benefits is based on simulations with actual data from the power grid operation based on optimization algorithm, for both solar-dish CSP operation alone and in Hybrid mode offering capacity credit two hours after sunset.
Last but not least, in order for the power grid operator to verify capacity credit assurance and receive information from the Hybrid plant, measuring requirements should be issued. A review of existing regulations on this issue is also made in this thesis.
A Note on the Fourier coefficients of half-integral weight modular forms
Creators: name: Kumar, Narasimha
name: Purkait, Soma
Publisher: name: arXiv
Year: 2013
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: Primary 11F30, 11F37: Secondary 11F11

description: In this note, we show that the algebraicity of the Fourier coefficients of half-integral weight modular forms can be determined by checking the algebraicity of the first few of them. We also give a necessary and sufficient condition for a half-integral weight modular form to be in Kohnen's +-subspace by considering only finitely many terms.
description: To appear in Archiv der Mathematik
Стратегії розвитку бізнес-екосистем підприємств енергетичного сектору
Creators: name: Бочко, Олена Юріївна
name: Таранський, Ігор Петрович
Publisher: name: Zenodo
Year: 2024
Subjects: бізнес-екосистеми, підприємства енергетичного сектору, стратегія партнерства, активно-наступальна стратегія, стратегія диверсифікації, стратегії комплементарності.

description: В статті обґрунтовано види стратегії розвитку бізнес-екосистем підприємств енергетичного сектору. Метою статті є дослідження стратегії розвитку бізнес-екосистем підприємств енергетичного сектору, що сприяє підвищенню рівня конкурентоспроможності підприємств в умовах воєнного стану. При написанні статті використано різні загальнонаукові та спеціальні методи дослідження: дедуктивний, індуктивний - при дослідженні позитивних і негативних аспектів стратегії розвитку бізнес-екосистем підприємств енергетичного сектору; аналізу і синтезу – при дослідженні наявних  стратегій розвитку енергетичної галузі; абстрактно-логічний метод - для теоретичних узагальнень і формування висновків. Досліджено та сформовано переваги і недоліки стратегій бізнес-екосистем. Серед основних переваг стратегії партнерства в бізнес-екосистемах виділено обмін знаннями, технологіями та ресурсами, зменшення ризиків через розподіл відповідальності, а також швидший вихід на нові ринки. Недоліками стратегії партнерства є ризик негативного впливу невдалих рішень партнерів, розбіжності в стратегіях та складність управління партнерськими відносинами. Активно-наступальна стратегія розвитку дозволяє компанії отримати перевагу над конкурентами, встановлювати правила та залучати нових учасників до екосистеми, проте така стратегія потребує значних ресурсів, може призвести до великих збитків у разі невдачі і вимагає швидкої адаптації до ринкових змін. Стратегія диверсифікації дозволяє компанії не залежати від одного ринку, розвивати нові продукти і підвищувати стійкість, однак більша кількість напрямків потребує більше ресурсів для управління, а надмірна диверсифікація може знизити фокус і конкурентоспроможність компанії. Серед переваг стратегії комплементарності в бізнес-екосистемах авторами виділено додаткові товари чи послуги, що підвищують привабливість основного продукту, збільшують дохід і сприяють лояльності клієнтів. Вони також допомагають виходити на нові ринки. Недоліками стратегії комплементарності є залежність попиту на комплементарні товари від основного продукту, складність управління товарним запасом, додаткові витрати на розробку та ризик зниження рентабельності через можливу необхідність знижок на основний продукт.
Light in correlated disordered media
Creators: name: Vynck, Kevin
name: Pierrat, Romain
name: Carminati, Rémi
name: Froufe-Pérez, Luis S.
name: Scheffold, Frank
name: Sapienza, Riccardo
name: Vignolini, Silvia
name: Sáenz, Juan José
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: The optics of correlated disordered media is a fascinating research topic emerging at the interface between the physics of waves in complex media and nanophotonics. Inspired by photonic structures in nature and enabled by advances in nanofabrication processes, recent investigations have unveiled how the design of structural correlations down to the subwavelength scale could be exploited to control the scattering, transport and localization of light in matter. From optical transparency to superdiffusive light transport to photonic gaps, the optics of correlated disordered media challenges our physical intuition and offers new perspectives for applications. This article reviews the theoretical foundations, state-of-the-art experimental techniques and major achievements in the study of light interaction with correlated disorder, covering a wide range of systems -- from short-range correlated photonic liquids, to Lévy glasses containing fractal heterogeneities, to hyperuniform disordered photonic materials. The mechanisms underlying light scattering and transport phenomena are elucidated on the basis of rigorous theoretical arguments. We overview the exciting ongoing research on mesoscopic phenomena, such as transport phase transitions and speckle statistics, and the current development of disorder engineering for applications such as light-energy management and visual appearance design. Special efforts are finally made to identify the main theoretical and experimental challenges to address in the near future.
description: Accepted in Reviews of Modern Physics
Stable Numerical Integration of an Epitaxial Growth Model with Slope Selection
Creators: name: Seyfarth, Gregory M.
name: Vollmayr-Lee, Benjamin P.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We consider a continuum phase field model for crystal growth via molecular beam epitaxy, with the goal of determining stable numerical time integration methods for the dynamics. We parametrize a class of semi-implicit methods that are linear in the updated field, which allows for efficient implementation with fast Fourier transforms. We perform unconditional von Neumann stability analysis to identify the region of stability in parameter space, and then test these predictions numerically for gradient stability. We find strong agreement between the approaches.
description: 22 pages, 5 figures
A comparison of LSTM and GRU networks for learning symbolic sequences
Creators: name: Cahuantzi, Roberto
name: Chen, Xinye
name: Güttel, Stefan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Neural and Evolutionary Computing (cs.NE)
subject: FOS: Computer and information sciences
subject: I.2.6; I.5.1
subject: 68T10

description: We explore the architecture of recurrent neural networks (RNNs) by studying the complexity of string sequences it is able to memorize. Symbolic sequences of different complexity are generated to simulate RNN training and study parameter configurations with a view to the network's capability of learning and inference. We compare Long Short-Term Memory (LSTM) networks and gated recurrent units (GRUs). We find that an increase in RNN depth does not necessarily result in better memorization capability when the training time is constrained. Our results also indicate that the learning rate and the number of units per layer are among the most important hyper-parameters to be tuned. Generally, GRUs outperform LSTM networks on low-complexity sequences while on high-complexity sequences LSTMs perform better.
Optimal qubit circuits for quantum-enhanced telescopes
Creators: name: Czupryniak, Robert
name: Steinmetz, John
name: Kwiat, Paul G.
name: Jordan, Andrew N.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We propose two optimal phase-estimation schemes that can be used for quantum-enhanced long-baseline interferometry. By using distributed entanglement, it is possible to eliminate the loss of stellar photons during transmission over the baselines. The first protocol is a sequence of gates using nonlinear optical elements, optimized over all possible measurement schemes to saturate the Cramér-Rao bound. The second approach builds on an existing protocol, which encodes the time of arrival of the stellar photon into a quantum memory. Our modified version reduces both the number of ancilla qubits and the number of gate operations by a factor of two.
description: 14 pages, 9 figures
The Benefits of Spin Polarization for Inertial and Magneto-Inertial Fusion Propulsion
Creators: name: Bruhaug, Gerrit
name: Kish, Ayden
Publisher: name: arXiv
Year: 2021
Subjects: subject: Space Physics (physics.space-ph)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: Spin-polarized fusion has the potential to lower the radiation shielding and ignition requirements for fusion rockets while simultaneously increasing the fusion fuel burnup and provide better momentum coupling to a spacecraft. This potential is estimated using simple, analytic techniques. Both DT and D\textsuperscript{3}He fusion fuels are analyzed.
Socio-ecological Interactions in a Changing Climate: A Review of the Mongolian Pastoral System
Creators: name: Kakinuma, Kaoru
name: Yanagawa, Aki
name: Sasaki, Takehiro
name: Rao, Mukund Palat
name: Kanae, Shinjiro
Publisher: name: Columbia University
Year: 2019
Subjects: Climatic changes
Pastoral systems
Herders
Droughts

description: Coping with climate change in socio-ecological systems is one of the most urgent issues facing the world. This is particularly true in socio-ecological systems, where climate not only influences social and ecosystem dynamics, but also modulates their interaction. In this paper, we presented a conceptual framework through a literature review and a trend analysis for assessing the impact of climate change that incorporates socio-ecological interactions. In particular, we focused on the Mongolian pastoral system, which has tightly coupled socio-ecological interactions, as a model for describing the framework. Our framework suggests that the flexibility in mobility of herders is the principal factor in determining the vulnerability of the socio-ecological system to climate change. The flexibility varies along a climatic gradient and socio-ecological interactions in each region have evolved to be suited to its local climate regime. Herders in northern and central regions of Mongolia move shorter distances, and less flexible, than those in southern (Gobi) region. Climatic hazards, on the other hand have been increasing across Mongolia with a trend toward warmer and drier conditions since the 1960s. We suggest that further warming and drying would have the greatest impact on northern and central regions due to lower flexibility in mobility among herders there coupled with the much higher livestock density in the regions. The findings support that maintaining flexibility of mobile herding will likely be crucial to reducing the vulnerability of the Mongolian pastoral system to climate change.
Ruth Gould Dolesé
Creators: name: Johnson, Martin L.
Publisher: name: Columbia University
Year: 2020
Subjects: Women in the motion picture industry
Motion pictures
Silent films

description: One of the sharpest critiques of the cinema in the late aughts and early 1910s came from Progressive reformers, who sought to regulate both the spaces where movies were seen, particularly the “nickel” shows in poor, urban areas, and the stories and images presented in the cinema. But in addition to pushing for commercial regulation of the picture show, reformers also dreamed of an “educational cinema,” which would take the most edifying films screened in theaters and bring them to other sites, including schools. Ruth Gould Dolesé, trained as an arts educator, and one of the early members of the New York Board of Censorship of Motion Pictures (later the National Board of Censorship of Motion Pictures and then the National Board of Review of Motion Pictures), was one of the key players in the creation of an educational motion picture sector in the United States. In particular, her establishment of the Educational Department at the General Film Company in 1911, and, that same year, her publication of the Catalogue of Educational Motion Pictures made her a widely celebrated figure in the educational film movement, even though her early death in 1913 cut short a promising second career.
John Bull, Uncle Sam, Transatlantic Steamships, and the Mail
Creators: name: John, Richard R.
Publisher: name: Columbia University
Year: 2020
Subjects: Postal service
Steamboat lines
Transatlantic voyages
Postal subsidies

description: Historical writing on North Atlantic postal communications in the mid-nineteenth century has mostly focused on the gradual ascendancy of the Halifax-based Cunard Steamship Company, which completed its first transatlantic postal voyage in 1840. Largely overlooked in this literature is the long and often ideologically charged debate in the United States over the propriety of subsidizing postal transportation outside of the country’s territorial boundaries. A pivotal event in this debate was the 1849 confrontation in the U.S. Senate between Ohio Democrat William Allen and Connecticut Democrat John Niles. Allen opposed postal subsidies: in his view, the U.S. government should subsidize the circulation of information on public affairs, but not commercial correspondence. Niles, a former postmaster general, supported subsidies as a necessary adjunct to trade. To buttress his point, Allen ventured a remarkably expansive historical comparison between ancient Greece, where the absence of a postal system made representative government impossible, and the modern United States, where the postal system undergirded democratic politics. This debate effectively ended in 1851, when the U.S. Congress rejected its longstanding commitment to balancing postal revenue and postal expenditures, a victory for Niles. While forgotten today, this debate – and the comparable debate in the British Parliament over mail subsidies – is significant for at least two reasons. First, it marked an early chapter in the still-evolving debate over the role of national governments in what we would today call global information policy; and, second, it spawned a remarkably enduring visual iconography that popularized the figures of John Bull and Uncle Sam.
Synthesis of a chromium terephthalate metal organic framework and use as nanoporous adsorbent for removal of diazinon organophosphorus insecticide from aqueous media
Creators: name: Shadmehr, Jafar
name: Zeinali, Sedigheh
name: Tohidi, Maryam
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Biophysics
subject: Medicine
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Immunology
subject: FOS: Clinical medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Hematology

description: MIL-101(Cr), as a chromium terephthalate metal organic framework (MOF), is synthesized hydrothermally and used for removal of diazinon from aqueous media. Different methods such as FT-IR, FE-SEM, TGA, XRD and BET analysis were applied for characterization of prepared MIL-101(Cr). The results revealed that MIL-101(Cr) has octahedral structure, 96% crystallinity, thermal stability up to 550 °C and about 2600 m2/g BET surface area with microporous structure. Adsorption experiments were designed by Design expert software and the effect of parameters such as pH (2–10), temperature (25–61 °C), contact time (5–85 minutes) and adsorbent dosage (0.1–0.9 g/L) was investigated. Adsorption process was optimized by response surface methodology (RSM) and the optimum conditions of adsorption process was achieved in pH 6.5, temperature 25 °C, contact time 64 minutes and adsorbent dosage 0.74g/L which is lead to 96% removal of diazinon. In order to investigate the reusability and life time of MIL-101(Cr), the adsorbent is used in five successive cycles for adsorption of diazinon in fresh samples and good results are obtained. Langmuir and Freundlich isotherm models were deliberated by adsorption equilibrium data and Langmuir model show better conformity (R2 = 0.985) with the experimental results. Kinetic study was carried out using pseudo first order, pseudo second order and intraparticle diffusion kinetic models. Experimental data were better fitted to the pseudo second order with a correlation coefficient of 0.997 which signified that the experimental outcome of the adsorption of diazinon was a chemical adsorption.
title: Tensor-based fMRI signal processing
title: Επεξεργασία fMRI με χρήση Tensors
Creators: name: Καρακασης Παρις
Publisher: name: Technical University of Crete
Year: 2017

description: Functional magnetic resonance imaging (fMRI) is one of the most popular methods in studying the human brain. fMRI provides a non-invasive way to measure brain activity, detecting local changes of blood oxygen level density (BOLD) in the brain, over time.  The purpose of fMRI signal analysis is the localization of brain areas that are related with particular tasks. The problem of fMRI signal analysis can be considered as a blind source separation problem (BSS) , which is  the problem of extracting a set of source signals from a set of mixed signals, without using prior information (or with very little prior information) about the source signals or the mixing process.
	In this thesis, initially, we study the usage of nonnegative matrix factorization models in BSS problems, assuming the existence of delays in propagation environments with or without echo. Next, we study the usage of tensor factorization models, through PARAFAC and Nonnegative Tensor Factorization models, in BSS problems, as well as how these models can be extended under the assumption of propagation environments without echo. Finally, we use these tensor factorization models in fMRI data analysis. In our analysis, we processed fMRI data from different subjects performing the same tasks (group task related fMRI analysis) and we extracted common activation brain maps as well as common activation time signals.
Enhance photocatalytic properties of TiO2 using π-π* conjugate system
Creators: name: Gao, Hejun
name: Cai, Minghan
name: Liao, Yunwen
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Biochemistry
subject: Space Science
subject: Pharmacology
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Plant Biology
subject: FOS: Biological sciences

description: A novel π-π* conjugate system photo-catalyst was successfully constructed using aniline, pyrrole and TiO2. The structures of photo-catalyst were measured by XRD, SEM, BET, TEM, FT-IR, XPS and TGA in detail. The photocatalytic properties were investigated in rhodamine B and methyl orange solution, respectively. And the enhance mechanism of π-π* conjugate system was discussed in depth. The weight percentage of Ti weight about 47% in the compound and the π-π* conjugate system did not change the crystal structure of TiO2. The photocatalytic degradation properties of the π-π* conjugate system photo-catalyst could get 99% for rhodamine B and methyl orange after 10 and 15 min, respectively. The introduction of the π-π* conjugate system into TiO2 was beneficial to improve light harvest, photoelectric response and separation of electron-holes.
Polynomials over structured grids
Creators: name: Nica, Bogdan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Combinatorics (math.CO)
subject: Commutative Algebra (math.AC)
subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 05E40

description: We study multivariate polynomials over `structured' grids. We begin by proposing an interpretation as to what it means for a finite subset of a field to be structured; we do so by means of a numerical parameter, the nullity. We then extend several results--notably, the Combinatorial Nullstellensatz and the Coefficient Theorem--to polynomials over structured grids. The main point is that the structure of a grid allows the degree constraints on polynomials to be relaxed.
Gradient expansion of superhorizon perturbations in G-inflation
Creators: name: Frusciante, Noemi
name: Zhou, Shuang-Yong
name: Sotiriou, Thomas P.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We develop the gradient expansion formalism for shift-symmetric Galileon-type actions. We focus on backgrounds that undergo inflation, work in the synchronous gauge, and obtain a general solution up to second order without imposing extra conditions at first order. The solution simplifies during the late stages of inflation. We also define a curvature perturbation conserved up to first order.
description: 20 pages, JCAP version
Enhance photocatalytic properties of TiO2 using π-π* conjugate system
Creators: name: Gao, Hejun
name: Cai, Minghan
name: Liao, Yunwen
Publisher: name: Taylor & Francis
Year: 2018
Subjects: subject: Biochemistry
subject: Space Science
subject: Pharmacology
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Plant Biology
subject: FOS: Biological sciences

description: A novel π-π* conjugate system photo-catalyst was successfully constructed using aniline, pyrrole and TiO2. The structures of photo-catalyst were measured by XRD, SEM, BET, TEM, FT-IR, XPS and TGA in detail. The photocatalytic properties were investigated in rhodamine B and methyl orange solution, respectively. And the enhance mechanism of π-π* conjugate system was discussed in depth. The weight percentage of Ti weight about 47% in the compound and the π-π* conjugate system did not change the crystal structure of TiO2. The photocatalytic degradation properties of the π-π* conjugate system photo-catalyst could get 99% for rhodamine B and methyl orange after 10 and 15 min, respectively. The introduction of the π-π* conjugate system into TiO2 was beneficial to improve light harvest, photoelectric response and separation of electron-holes.
title: Η αφήγηση ως μέσο απεικόνισης χωρικών εννοιών: παιδαγωγικές θεωρήσεις και επεξήγηση των χωρικών σχέσεων μέσα από την αφήγηση
title: Narrative as a means of spatialization: explaining pedagogical opinions and spatial relationships through narrative

Creators: name: Μπουτση Μαρια
Publisher: name: Technical University of Crete
Year: 2019

description: Η παρούσα ερευνητική εργασία πραγματεύεται τις χωρικές ικανότητες των παιδιών και εξερευνεί την αφήγηση ως μέσο επικοινωνίας και διαπαιδαγώγησης τους. Η εργασία επιχειρεί να παραθέσει τεκμηριωμένες απόψεις για τη χωρική αντίληψη των παιδιών και στην πορεία να τις ενσωματώσει σε μία λογική αφήγησης, όντας προσφιλές μέσο για τα παιδιά. Η αφήγηση εντοπίζεται τόσο στη διαδικασία του παραμυθιού όσο και του παιχνιδιού.
title: Προσωρινή εγκατάσταση παιχνιδιού στην πλατεία Κατεχάκη: μια αφηγηματική προσέγγιση
title: Temporary playing installation in Katechaki square: a narrative approach
Creators: name: Μπουτση Μαρια
Publisher: name: Technical University of Crete
Year: 2019

description: Η διπλωματική εργασία αποτελεί μια δράση η οποία λειτουργεί σαν πολλαπλασιαστής, βάζοντας το παιδί σε μια θέση από την οποία θα παραλάβει ένα λιτό πλαίσιο (την κατασκευή-παιχνίδι) και θα την ενεργοποιήσει μέσω του παιχνιδιού (δραστηριότητά) του. Η δράση στην πλατεία Κατεχάκη λειτουργεί ως αστικός πυκνωτής για τα μικρά μέλη της κοινωνίας μας που, μέσα από την αφήγηση η οποία περιλαμβάνεται στο παιχνίδι τους, δίνουν ζωή στις κατασκευές. Οι κατασκευές παραλαμβάνονται ως ένα ανοιχτής μετάφρασης χωρικό αποτέλεσμα με εργαλείο τις αρχές της gestalt, ερμηνεύοντας γεωμετρικά σχήματα, σκιές, κενά αλλά και αντιθετικά δίπολα για ένα αποτέλεσμα παιχνιδιού.  Οι πολλαπλές επιλογές σεναρίου πάνω στα δοσμένα πλαίσια αποτελούν μια γενικευμένη δομή παραμυθιού. Η δομή αυτή εμφανίζεται παντού, σε κάθε δράση του παιδιού κατά τη διάρκεια του παιχνιδιού και εμφανίζει στους χρήστες της άπειρες δυνατότητες και εναλλακτικές ανά πάσα στιγμή, έχοντας πάντοτε την αφήγηση στο προσκήνιο.
title: Στα ίχνη του τείχους: αστικές περιπλανήσεις στις μνήμες του Θησείου
title: In the tracks of the wall: urban wandering within Thiseio's mamories
Creators: name: Ζαρανη Θεοδωρα
Publisher: name: Technical University of Crete
Year: 2019

description: Το Θησείο είναι μια εσωστρεφής γειτονία, με μνήμες από την αρχαία και σύγχρονη ελληνική ιστορία.Το νέο εγχαράσσεται πάνω στο παλιό και συνθέτει ενα τοπίο με έντονες αντιθέσεις και ασυνέχειες. Η υπάρχουσα δομή του, αγνοεί το αρχαιολογικό υπόβαθρο και διακατέχεται από ισχυρά όρια που ανακόμπτουν την κάθετη σύνδεση του με τους ιστορικούς χώρους και μνημεία ενδιαφέροντος. Η διπλωματική εργασία, εξετάζει τη δυνατότητα σύνδεσης και προβολής των κατακερματισμένων τμημάτων του αρχαίου θεμιστόκλειου τείχους, μέσα από την δημιουργία ενός περιπάτου, πάνω στις αρχαίες χαράξεις, με στόχο την ένταξη των μνημείων στον ζωντανό ιστό της πόλης, ανοίγοντας νέες σύγχρονες πύλες. Επιπροσθέτως, μέσω μιας δεύτερης διαδρομής, επιδιώκεται η ενοποίηση του δικτύου πρασίνου και  η ενεργοποίηση σε τοπικό επίπεδο, εισάγοντας νέες χρήσεις σε αναξιοποίητα ισόγεια καθώς και αστικές καλλιέργειες, που απαντούν σε προβλήματα της βιώσιμης αστικής ανάπτυξης.
title: Νεοελληνική κατοικία : αρχιτεκτονική της κοινωνικής ανέλιξης
Creators: name: Ζαρανη Θεοδωρα
Publisher: name: Technical University of Crete
Year: 2017

description: Aπό την αρχαιότητα, η κατοικία λειτουργεί σαν τεκμήριο κοινωνικής προβολής και ανέλιξης, ακολουθώντας τα κυρίαρχα πρότυπα και τις τάσεις των εκάστοτε περιόδων.
Οι κατοικίες είναι ποσοτικά τα περισσότερα κτήρια που οικοδομούνται και καθορίζουν την εικόνα του δομημένου χώρου και στην αρχιτεκτονική τους εκφράζεται το συνολικό ιστορικό, κοινωνικό, οικονομικό, πνευματικό και καλλιτεχνικό πλαίσιο κάθε εποχής.
Κατά τις εξεταζόμενες ταραγμένες περιόδους, η κατοικία στην Αθήνα έπαιξε συχνά τον ρόλο ανελκυστήρα κοινωνικής κινητικότητας ,μετατρέποντας ευρείες μάζες του αγροτικού και μεταναστευτικού πληθυσμού, χαμηλών και μεσαίων εισοδημάτων σε αστούς, μεταλλάσσοντας προοδευτικά τα πολυάριθμα μικρά και μεσαία στρώματα που επεδίωκαν να βελτιώσουν την οικονομική και κοινωνική τους θέση, αναζητώντας κάθε φορά νέο τόπο και τύπο κατοικίας.
Το όνειρο της ατομικής κοινωνικής ανέλιξης και η προσδοκία της κοινωνικής προόδου αποτελoύν τα κυριότερα ιδεολογικά χαρακτηριστικά του μικροαστισμού,  καθώς οι μικροαστοί διακρίνονται για την ανάγκη μιμητισμού και ταύτισης με τα ανώτερα κοινωνικά στρώματα και ασπάζονται τις αστικές αξίες και τον αστικό τρόπο ζωής. Η επένδυση τους στην κατοικία δεν αποτέλεσε μόνο μικροαστική σύμβαση ή απόρροια ενός κοινωνικού θεσμού αλλά υπήρξε παράλληλα και μέσο για ασφαλή τοποθέτηση των ιδιωτικών αποταμιεύσεων.
Οι επικρατούσες οικονομοπολιτικές συνθήκες των εξεταζόμενων περιόδων, σε συνδυασμό με τον διακαή πόθο της κοινωνικής ανέλιξης, διαμόρφωναν τα  εκάστοτε νέα κριτήρια επιλογής κατοικίας, σύμφωνα με τα μεταβαλλόμενα καταναλωτικά πρότυπα της εποχής, δίνοντας νέο νόημα στην κατοικία ως σύμβολο ευμάρειας. Παράλληλα πραγματοποιούνται κοινωνικές αλλαγές και ραγδαίες κινητικότητες που επαναπροσδιορίζουν συνεχώς το μοντέλο κατοίκησης.
Fermionic vacuum polarization by a cosmic string in anti-de Sitter spacetime
Creators: name: de Mello, E. R. Bezerra
name: Medeiros, E. R. Figueiredo
name: Saharian, A. A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this paper we investigate the fermionic condensate (FC) and the vacuum expectation value (VEV) of the energy-momentum tensor, associated with a massive fermionic field, induced by the presence of a cosmic string in the anti-de Sitter (AdS) spacetime. In order to develop this analysis we construct the complete set of normalized eigenfunctions in the corresponding spacetime. We consider a special case of boundary conditions on the AdS boundary, when the MIT bag boundary condition is imposed on the field operator at a finite distance from the boundary, which is then taken to zero. The FC and the VEV of the energy-momentum tensor are decomposed into the pure AdS and string-induced parts. Because the analysis of one-loop quantum effects in the AdS spacetime has been developed in the literature, here we are mainly interested to investigate the influence of the cosmic string on the VEVs. The string-induced part in the VEV of the energy-momentum tensor is diagonal and the axial and radial stresses are equal to the energy density. For points near the string, the effects of the curvature are subdominant and to leading order, the VEVs coincide with the corresponding VEVs for the cosmic string in Minkowski bulk. At large proper distances from the string, the decay of the VEVs show a power-law dependence of the distance for both massless and massive fields. This is in contrast to the case of Minkowski bulk where, for a massive field, the string-induced parts decay exponentially.
description: Appendix is added about the boundary condition on AdS boundary, discussion and references are added related to AdS/CFT correspondence; accepted for publication in Classical and Quantum Gravity
Suris tetrons: possible spectroscopic evidence for four-particle optical excitations of the 2D electron gas
Creators: name: Koudinov, A. V.
name: Kehl, C.
name: Rodina, A. V.
name: Geurts, J.
name: Wolverson, D.
name: Karczewski, G.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The excitations of a two-dimensional electron gas in quantum wells with intermediate carrier density (~10^{11} cm^{-2}), i.e., between the exciton-trion- and the Fermi-Sea range, are so far poorly understood. We report on an approach to bridge this gap by a magneto-photoluminescence study of modulation-doped (Cd,Mn)Te quantum well structures. Employing their enhanced spin splitting, we analyzed the characteristic magnetic-field behavior of the individual photoluminescence features. Based on these results and earlier findings by other authors, we present a new approach for understanding the optical transitions at intermediate densities in terms of four-particle excitations, the Suris tetrons, which were up to now only predicted theoretically. All characteristic photoluminescence features are attributed to emission from these quasi-particles when attaining different final states.
description: 12 pages, 3 figures
Radio Unnameable
Creators: name: (:Unav)
Publisher: name: Columbia University
Year: 2019

description: End of unidentified instrumental. Bob announces that he is back in the WBAI control room and asks for calls. Unidentified instrumental plays (Mellotron or Farfisa organ?). Indian classical piece by Ustad Ali Akbhar Khan plays. "Army Man Blues' by Big Joe Williams (recorded 1961) plays. "Don't Talk Me To Death" plays. Guitar song in other language plays. "Aftermyth of War" (British comedy sketch) by Beyond the Fringe plays. "Trouble in Mind" plays. Guitar instrumental version of "Greensleeves' plays. A comedic parody of "Greensleeves" plays