cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
ECADOC Summer Schools: Quality Assurance and Enhancement
Creators: name: Katsarov, Johannes
Publisher: name: Network for Innovation in Guidance and Counselling in Europe (NICE)
Year: 2017

description: The European Doctoral Programme in Career Guidance and Counselling (ECADOC), financially supported by the European Commission under the Lifelong Learning Programme from 2013-2016, had two key objectives. The first objective was to formulate a joint research agenda, with the aim of inspiring cooperative trans-disciplinary research in our field in the future. The second objective was to organise a first series of annual summer schools, to support the emergence of a generation of early-stage researchers, who are dedicated to the practice of career guidance and counselling, international and trans-disciplinary cooperation. The sustainability of our efforts – building something to last – has always been at the heart of this project. Hence, questions of assuring quality and reaching excellence have guided us since we first came up with the idea of ECADOC.
The purpose of this article is to share our concepts of quality assurance and enhancement for the summer schools of ECADOC, and to illustrate some of the central lessons, which we have learned over the past three years.
description: NICE Newsletter, No 1 (2017)
Equivalence of fluctuation-dissipation and Edwards' temperature in cyclically sheared granular systems
Creators: name: Zeng, Zhikun
name: Zhang, Shuyang
name: Zheng, Xu
name: Xia, Chengjie
name: Kob, Walter
name: Yuan, Ye
name: Wang, Yujie
Publisher: name: arXiv
Year: 2022
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Using particle trajectory data obtained from x-ray tomography, we determine two kinds of effective temperatures in a cyclically sheared granular system. The first one is obtained from the fluctuation-dissipation theorem which relates the diffusion and mobility of lighter tracer particles immersed in the system. The second is the Edwards compactivity defined via the packing volume fluctuations. We find robust excellent agreement between these two temperatures, independent of the type of the tracers, cyclic shear amplitudes, and particle surface roughness. We further elucidate that in granular systems the viscous-like drag force is due to the broken symmetry of the local contact geometry.
description: 19 pages, 6 figures
Two months later: Outcomes of the March 27th order to release people jailed for technical violations during the pandemic
Creators: name: Schiraldi, Vincent N.
Publisher: name: Columbia University
Year: 2020
Subjects: Criminal justice, Administration of
Discrimination in criminal justice administration
Parole
Prisons
Jails
COVID-19 (Disease)

description: This research brief assesses the impact of a March 27, 2020 announcement from the New York State Department of Corrections and Community Supervision (DOCCS), indicating that it would release up to 1,100 people jailed in county facilities for accusations of technical parole violations in response to the COVID-19 pandemic. It concludes that the state released around three-quarters of those originally anticipated by the NYS Department of Corrections and Community Supervision. It additionally finds that in the two months since the directive was issued, more than 160 people accused of technical parole violations were newly sent to the Rikers jails. This number appears to be accelerating and is projected to surpass the number of people released by June or early July, 2020. The brief concludes with recommendations for policy and practice.
Lattice QCD in rotating frames
Creators: name: Yamamoto, Arata
name: Hirono, Yuji
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We formulate lattice QCD in rotating frames to study the physics of QCD matter under rotation. We construct the lattice QCD action with the rotational metric and apply it to the Monte Carlo simulation. As the first application, we calculate the angular momenta of gluons and quarks in the rotating QCD vacuum. This new framework is useful to analyze various rotation-related phenomena in QCD.
title: Complementarities Between Fiscal Policy and Monetary Policy—Literature Review
Creators: name: Dong, Wei
name: Dunbar, Geoffrey
name: Friedrich, Christian
name: Matveev, Dmitry
name: Priftis, Romanos
name: Shao, Lin
Publisher: name: Bank of Canada
Year: 2021

description: This paper surveys and summarizes the literature on how fiscal policy and monetary policy can complement each other in stabilizing economic activity.

description: Nous passons en revue les écrits spécialisés consacrés à la capacité des politiques budgétaire et monétaire à se compléter pour stabiliser l’activité économique, puis nous en proposons une synthèse.
Observations about the Lie algebra $\mathfrak{g}_2 \subset \mathfrak{so}(7)$, associative $3$-planes, and $\mathfrak{so}(4)$ subalgebras
Creators: name: Chemtov, Max
name: Karigiannis, Spiro
Publisher: name: arXiv
Year: 2022
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 53C15, 22E60

description: We make several observations relating the Lie algebra $\mathfrak{g}_2 \subset \mathfrak{so}(7)$, associative $3$-planes, and $\mathfrak{so}(4)$ subalgebras. Some are likely well-known but not easy to find in the literature, while other results are new. We show that an element $X \in \mathfrak{g}_2$ cannot have rank $2$, and if it has rank $4$ then its kernel is an associative subspace. We prove a canonical form theorem for elements of $\mathfrak{g}_2$. Given an associative $3$-plane $P$ in $\mathbb R^7$, we construct a Lie subalgebra $Θ(P)$ of $\mathfrak{so}(7) = Λ^2 (\mathbb R^7)$ that is isomorphic to $\mathfrak{so}(4)$. This $\mathfrak{so}(4)$ subalgebra differs from other known constructions of $\mathfrak{so}(4)$ subalgebras of $\mathfrak{so}(7)$ determined by an associative $3$-plane. These are results of an NSERC undergraduate research project. The paper is written so as to be accessible to a wide audience.
description: 21 pages, no figures. These are the results of an NSERC undergraduate research project. The paper is written so as to be accessible to a wide audience. Comments are welcome. Version 2: minor typos corrected as per referee's report. Final version, to appear in "Expositiones Mathematicae"
Enjeux de communication dans la multirepr{é}sentation cartographique reproductible
Creators: name: Lambert, Nicolas
name: Giraud, Timothée
name: Ysebaert, Ronan
Publisher: name: arXiv
Year: 2023
Subjects: subject: Other Computer Science (cs.OH)
subject: FOS: Computer and information sciences

description: This chapter deepens cartographic communication through a cartographic multirepresentation exercise. Using a single dataset on World population data, the chapter presents a series of 13 different maps to illustrate how mapping is primarily a matter of choices and methods.
description: in French language
title: A caching platform for large scale data-intensive distributed applications
Creators: name: Καφριτσας Νικολαος
Publisher: name: Technical University of Crete
Year: 2019

description: In the last decade, data processing systems started using main memory as much as possible, in order to speed up computations and boost performance. Towards this direction, many breakthroughs were created in the stream processing systems, which must meet rigorous demands and achieve sub-second latency along with high throughput. These advancements were feasible due to the availability of large amounts of DRAM at a plummeting cost and the rapid evolution of in-memory databases. However, in the Big Data era, maintaining such a huge amount of data in memory is impossible. On the other hand, the use of disk-based databases to remedy the situation is prohibitively expensive in terms of disk latencies. The ideal scenario would be to have the high access speed of memory, with the large capacity and low price of disk. This hinges on the ability to effectively utilize both the main memory and disk. Consequently, developing a solution which somehow combines the benefits of both worlds is highly desirable.

This diploma thesis tackles the aforementioned problem by proposing an alternative architecture. More specifically, hot data are stored in memory, while cold data are moved to disk in a transactionally-safe manner as the database grows in size. Because data initially reside in memory, this architecture reverses the traditional storage hierarchy of disk-based systems. The disk is treated as an extended storage for evicted elements/cold data, not the primary host for the whole data. Based on this architecture, a multi-layered platform is presented which is highly scalable and can work in a distributed manner. The memory layer acts as a cache with configurable capacity and provides several eviction policies, the most important being a variation of the traditional LFU eviction policy. In particular, data regarded as cold could return back to memory if it becomes hot again, a case that occurs when the distribution of data changes in online processing. Thanks to this feature and the sub-second latency that is achieved, the platform can also perform efficiently in a streaming environment and can be used as a stateful memory component in a real-time architecture. The disk layer is flexible and elastic, meaning that users can use the database of their choice as a disk-based storage for cold data. Finally, the platform is tested in different scenarios under heavy load, and the benchmarks showed that it can perform extremely well and achieve throughput in the order of thousands of elements per second.
Charged pseudoscalar and vector meson masses under strong magnetic fields in an extended NJL model
Creators: name: Carlomagno, J. P.
name: Dumm, D. Gomez
name: Villafañe, M. F. Izzo
name: Noguera, S.
name: Scoccola, N. N.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The mass spectrum of $π^+$ and $ρ^+$ mesons in the presence of a static uniform magnetic field $\vec B$ is studied within a two-flavor NJL-like model. We improve previous calculations taking into account the effect of Schwinger phases carried by quark propagators, and using an expansion of meson fields in terms of the solutions of the corresponding equations of motion for nonzero $B$. It is shown that the meson polarization functions are diagonal in this basis. Our numerical results for the $ρ^+$ meson spectrum are found to disfavor the existence of a meson condensate induced by the magnetic field. In the case of the $π^+$ meson, $π$ - $ρ$ mixing effects are analyzed for the meson lowest energy state. The predictions of the model are compared with available lattice QCD results.
description: 35 pages, 4 figures. arXiv admin note: text overlap with arXiv:2205.15928
title: Evaluating the Intel Harp (tightly-coupled CPU-FPGA) platform with an ARM many-core accelerator
title: Αξιολόγηση της πλατφόρμας Intel Harp με χρήση ενός επιταχυντή ARM με πολλαπλούς πυρήνες
Creators: name: Πεκριδης Γεωργιος
Publisher: name: Technical University of Crete
Year: 2019

description: The purpose of this thesis was to evaluate Intel's platform with scalable Xeon CPU and an integrated Arria 10 FPGA. The communication between CPU and FPGA is done with three physical channels, one QPI (Quick Path Interconnect) coherent channel and two PCIe non-coherent channels. There is also a shared memory  between the two sides. The read and write bandwidth of the FPGA to the shared memory is approximately 19 GB/s respectively. The FPGA side consists of a static and a reconfigurable part. The static part implements all the necessary components to establish the communication with the CPU. The reconfigurable part is connected with the static part through the Core Cache Interface protocol (CCI-P) that provides a level of abstraction to the developer for starting developing accelerators. The system consists of software and hardware implementations. The evaluation was done with an ARM many core accelerator. The ARM core has a 3-stage pipeline, it uses a 32-bit architecture and is implements the ARMv4 instruction set. Also it implements a few basic floating point instructions. The RTL for the ARM core was written in Bluespec System Verilog (BSV). The hardware architecture has 16 ARM cores. Each core has a direct-map cache with a variable size. Instruction and data memories of every core can be initialized from software in order to the processors can execute the programs that are defined by the developer. The code and the data for the internal memories of each core are read form binary files. Each core is assigned with buffers with a certain amount of memory space to read and write data from/to it. The hardware can have access to them with the use of physical addresses. For the purpose of measuring the bandwidth of the design STREAM benchmark was used. Plus a matrix multiplication test was made as a way to check how the architecture handles real life applications.
РОЛЬ ЮВЕЛИРНОГО ИСКУССТВА В ДИЗАЙНЕ
Creators: name: Юлдашова, Нодира
Publisher: name: Zenodo
Year: 2024

description: В данной статье рассматриваются роль ювилирного искусства в дизайн интерьера, дизайн одежды и промышленного дизайна.
Transient behavior of fractional queues and related processes
Creators: name: Cahoy, Dexter O.
name: Polito, Federico
name: Phoha, Vir V.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics

description: We propose a generalization of the classical M/M/1 queue process. The resulting model is derived by applying fractional derivative operators to a system of difference-differential equations. This generalization includes both non-Markovian and Markovian properties, which naturally provide greater flexibility in modeling real queue systems than its classical counterpart. Algorithms to simulate M/M/1 queue process and the related linear birth-death process are provided. Closed-form expressions of the point and interval estimators of the parameters of these fractional stochastic models are also presented. These methods are necessary to make these models usable in practice. The proposed fractional M/M/1 queue model and the statistical methods are illustrated using S&P data.
Probing the Supersymmetric Grand Unified Theories with Gravity Mediation at the Future Proton-Proton Colliders and Hyper-Kamiokande Experiment
Creators: name: Ahmed, Waqas
name: Li, Tianjun
name: Raza, Shabbar
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: With the grand desert hypothesis, we have proposed to probe the supersymmetric Grand Unified Theories (GUTs) at the future proton-proton (pp) colliders and Hyper-Kamiokande experiment previously. In this paper, we study the supersymmetric GUTs with gravity mediated supersymmetry breaking in details. First, considering the dimension-six proton decay via heavy gauge boson exchange, we point out that we can probe the supersymmetric GUTs with GUT scale $M_{GUT}$ up to $1.778\times 10^{16}$ GeV at the Hyper-Kamiokande experiment. Second, for the supersymmetric GUTs with $M_{GUT} \ge 1.0\times 10^{16}$ GeV and $M_{GUT} \ge 1.2\times 10^{16}$ GeV, we show that the upper bounds on the universal gaugino mass are $7.2$ TeV and 3.5 TeV, respectively, and thus the corresponding upper bounds on gluino mass are 15 TeV and 8 TeV, respectively. Also, we shall study the masses for charginos, neutralinos, squarks, sleptons, and Higgs particles in details. In particular, the supersymmetric GUTs with $M_{GUT} \leq 1.2\times 10^{16}$ GeV can be probed at the Hyper-Kamiokande experiment, and the supersymmetric GUTs with $M_{GUT}\ge 1.2\times 10^{16}$ GeV can be probed at the future 100 TeV pp collider experiments such as the ${\rm FCC}_{\rm hh}$ and SppC via gluino searches. Thus, the supersymmetric GUTs with gravity mediation can be probed by the ${\rm FCC}_{\rm hh}$, SppC, and Hyper-Kamiokande experiments. In our previous study, we have shown that the supersymmetric GUTs with anomaly and gauge mediated supersymmetry breakings are well within the reaches of these experiments. Therefore, our proposal provides the concrete scientific goal for the ${\rm FCC}_{\rm hh}$, SppC, and Hyper-Kamiokande experiments: probing the supersymmetric GUTs.
description: 10 pages, 4 figures, 1 table
Microscopic description of the torque acting on fission fragments
Creators: name: Scamps, Guillaume
Publisher: name: arXiv
Year: 2022
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: When two fragments are created in a fission decay, any torque due to nuclear and Coulomb interaction can change the fragment's angular momentum. This article explores the character and magnitude of the angular momentum as a function of the initial conditions around the scission point using the time-dependent Hartree-Fock theory. To understand the torque acting on the fragments, the Frozen Hartree-Fock method is also used to determine the collective potential at scission. Two $^{240}$Pu fission channel ( $^{132}$Sn+$^{108}$Ru and $^{144}$Ba+$^{96}$Sr ) are studied. These two channels cover different shapes (spherical, quadrupole, and octupole deformation) of the fragments. It is found that the angular momentum generated by the Coulomb interaction after fission is mainly collective, while this is not the case for the angular momentum generated at scission. The competition between rotational modes (bending, wriggling, and twisting) is discussed and shows that the angular momentum is generated mainly perpendicular to the fission axis.
description: 8 pages, 10 figures
Short Tutorial on using NASA’s GIOVANNI web tool to create regional-scale time series
Creators: name: Tong, Daniel
name: Shen, Suhung
name: Wei, Jennifer
Publisher: name: Columbia University
Year: 2020
Subjects: Air quality
Air quality--Measurement

description: Satellite observations can provide useful information on long term changes in air quality. One of the most widely used satellite products is tropospheric NO₂, which has been retrieved from several different satellite sensors. We provide here a quick tutorial on using Giovanni to analyze a trend in tropospheric NO₂ data, from the NASA Ozone Monitoring Instrument (OMI) sensor, over a region of interest.
Top-down particle filtering for Bayesian decision trees
Creators: name: Lakshminarayanan, Balaji
name: Roy, Daniel M.
name: Teh, Yee Whye
Publisher: name: arXiv
Year: 2013
Subjects: subject: Machine Learning (stat.ML)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Decision tree learning is a popular approach for classification and regression in machine learning and statistics, and Bayesian formulations---which introduce a prior distribution over decision trees, and formulate learning as posterior inference given data---have been shown to produce competitive performance. Unlike classic decision tree learning algorithms like ID3, C4.5 and CART, which work in a top-down manner, existing Bayesian algorithms produce an approximation to the posterior distribution by evolving a complete tree (or collection thereof) iteratively via local Monte Carlo modifications to the structure of the tree, e.g., using Markov chain Monte Carlo (MCMC). We present a sequential Monte Carlo (SMC) algorithm that instead works in a top-down manner, mimicking the behavior and speed of classic algorithms. We demonstrate empirically that our approach delivers accuracy comparable to the most popular MCMC method, but operates more than an order of magnitude faster, and thus represents a better computation-accuracy tradeoff.
description: ICML 2013
title: Content caching in cellular networks: an algorithmic comparison
title: Προσωρινή αποθήκευση περιεχομένου σε κυψελωτά δίκτυα: μία σύγκριση αλγορίθμων
Creators: name: Μωτος Μιχαηλ
Publisher: name: Technical University of Crete
Year: 2019

description: The ever-increasing content demand along with an increase in content size has begged the question to explore efficient caching algorithms in order to address the need for lag free content delivery and reduced costs and backhaul load. First, we consider the caching placement policy as a 0-1 Knapsack problem and then proceed to introduce the system model. Next, we comprehensively formulate the 0-1 Knapsack problem, and describe two algorithmic solutions, a simple and fast greedy algorithm, which is not optimal, and an optimal dynamic programming one. We also describe in detail the simulation model and the pertinent distributions we ran our simulations with. The results indicate that no matter the type of the weight distribution (weight here corresponds to the length of the content items) or its characteristics, the greedy algorithm manages to closely match the results of the dynamic programming one, while at the same time offering greatly reduced runtime complexity. On this basis, the simple and fast greedy algorithm considered is a very good choice as a caching policy, since content provision services currently offer large catalogues, where dynamic programming exhibits exorbitant running times.
Higgs properties in a broken Inert Doublet Model
Creators: name: Enberg, Rikard
name: Rathsman, Johan
name: Wouda, Glenn
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We consider a model for the Higgs sector with two scalar doublets and a broken $Z_2$ symmetry, the Stealth Doublet Model, where the $Z_2$ symmetry is manifest in the Yukawa sector but broken by the scalar potential. This model can be seen as a generalization of the Inert Doublet Model. One of the doublets is the Higgs doublet that participates in electroweak symmetry breaking and couples to fermions. The other doublet does not couple to fermions at tree level and does not acquire a vacuum expectation value. The broken $Z_2$ symmetry leads to interesting phenomenology such as mixing between the two doublets and charged and CP-odd scalars that can be light and have unusual decay channels. We present theoretical and experimental constraints on the model and consider the recent observation of a Higgs boson at the LHC. The data on the $H\toγγ$ channel can be naturally accommodated in the model, with either the lightest or the heaviest CP-even scalar playing the role of the observed particle.
description: 12 pages, 3 figures. Updated to include contents of Erratum. Arguments about Z2 breaking revised, results unchanged
title: Ενσωματωμένο πραγματικού χρόνου σύστημα για ανίχνευση οπών σε δίχτυα ιχθυοκαλλιεργειών
title: Real time embedded system for holes detection in fish farming nets
Creators: name: Μπαδογιαννης Νικολαος
Publisher: name: Technical University of Crete
Year: 2019

description: Τεχνικές επεξεργασίας εικόνας χρησιμοποιούνται συχνά στη βιομηχανία για τον ποιοτικό έλεγχο προϊόντων. Η πολυπλοκότητα τους καθιστά απαραίτητη την αναζήτηση μεθόδων επιτάχυνσης των τεχνικών αυτών σε hardware ώστε να είναι εφικτή η χρήση τους σε ενσωματωμένα συστήματα πραγματικού χρόνου με μικρή κατανάλωση ενέργειας.
Ένα τέτοιο πρόβλημα μελετά η παρούσα διπλωματική, καθώς αναζητούνται τεχνικές οι οποίες θα οδηγήσουν στην ανίχνευση οπών σε δίχτυα ιχθυοκαλλιεργειών. Στόχος της παρούσας διπλωματικής είναι η σχεδίαση ενός ενσωματωμένου συστήματος πραγματικού χρόνου με χαμηλό χρόνο εκτέλεσης και κατανάλωση ενέργειας. Αφού μοντελοποιήθηκαν αλγόριθμοι που χρησιμοποιούν Template Matching και Edge Detection σε Matlab, έγιναν πειράματα για να διαπιστωθεί κατά πόσο είναι εφικτή η χρήση τους σε ένα τέτοιο πρόβλημα. Έπειτα υλοποιήθηκαν σε FPGA για την εξαγωγή συμπερασμάτων όσο αφορά την κατανάλωση ενέργειας, την απαιτούμενη δέσμευση πόρων και το συνολικό χρόνο εκτέλεσης.
description: Image processing techniques are used by the industry for the quality control of
the products. Their complexity demands research on methods that can accelerate these techniques on hardware and make possible their use on real time embedded systems with low power consumption.
This thesis diploma studies image processing methods for the detection of holes on fish farming nets. The main purpose of this thesis is to design a real time embedded system with low execution time and power consumption. Once implemented algorithms that use Template Matching and Edge Detection techniques, we studied them experimentally using Matlab to detect if they can be used for this purpose. Then we implemented our algorithms on FPGA and checked their demands on resources, power consumption and total execution time.
Spontaneous fractional Josephson current from parafermions
Creators: name: Iyer, Kishore
name: Ratnakar, Amulya
name: Mukhopadyaya, Aabir
name: Rao, Sumathi
name: Das, Sourin
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study a parafermion Josephson junction (JJ) comprising a pair of counter-propagating edge modes of two quantum Hall (QH) systems, proximitized by an s-wave superconductor. We show that the difference between the lengths (which can be controlled by external gates) of the two counter-propagating chiral edges at the Josephson junction, can act as a source of spontaneous phase bias. For the Laughlin filling fractions, $ν= 1/m,~ m \in 2\mathbb{Z}+1$, this leads to an electrical control of either Majorana $(m=1)$ or parafermion $(m\neq 1)$ zero modes.
description: 10 pages, 4 figures
The relationship between the incidence of X-ray selected AGN in nearby galaxies and star-formation rate
Creators: name: Birchall, Keir L.
name: Watson, M. G.
name: Aird, J.
name: Starling, R. L. C.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present the identification and analysis of an X-ray selected AGN sample that lie within the local ($z < 0.35$) galaxy population. From a parent sample of 22,079 MPA-JHU (based on SDSS DR8) galaxies, we identified 917 galaxies with central, excess X-ray emission (from 3XMM-DR7) likely originating from an AGN. We measured the host galaxies' star formation rates and classified them as either star-forming or quiescent based on their position relative to main sequence of star formation. Only 72% of the X-ray selected sample were identified as AGN using BPT selection; this technique is much less effective in quiescent hosts, only identifying 50% of the X-ray AGN. We also calculated the growth rates of the black holes powering these AGN in terms of their specific accretion rate ($\propto \mathrm{L_X/M_*}$) and found quiescent galaxies, on average, accrete at a lower rate than star-forming galaxies. Finally, we measured the sensitivity function of 3XMM so we could correct for observational bias and construct probability distributions as a function of accretion rate. AGN were found in galaxies across the full range of star formation rates ($\log_{10} \mathrm{SFR/M_\odot\ yr^{-1}} = -3\ \mathrm{to}\ 2$) in both star-forming and quiescent galaxies. The incidence of AGN was enhanced by a factor 2 (at a 3.5$σ$ significance) in star-forming galaxies compared to quiescent galaxies of equivalent stellar mass and redshift, but we also found a significant population of AGN hosted by quiescent galaxies.
description: 14 pages, 8 figures, 2 appendices; published in MNRAS
HyperGal: hyperspectral scene modeling for supernova typing with the Integral Field Spectrograph SEDmachine
Creators: name: Lezmy, J.
name: Copin, Y.
name: Rigault, M.
name: Smith, M.
name: Neill, J. D.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Recent developments in time domain astronomy, like the Zwicky Transient Facility, have made possible a daily scan of the entire visible sky, leading to the discovery of hundreds of new transients every night. Among them, 10 to 15 are supernovae (SNe), which have to be classified prior to cosmological use. The Spectral Energy Distribution machine (SEDm), a low resolution Integral Field Spectrograph, has been designed, built, and operated to spectroscopically classify targets detected by the ZTF main camera. The current Pysedm pipeline is limited by contamination when the transient is too close to its host galaxy core; this can lead to an incorrect typing and ultimately bias the cosmological analyses, and affect the SN sample homogeneity in terms of local environment properties. We present a new scene modeler to extract the transient spectrum from its structured background, aiming at improving the typing efficiency of the SEDm. HyperGal is a fully chromatic scene modeler, which uses pre-transient photometric images to generate a hyperspectral model of the host galaxy; it is based on the CIGALE SED fitter used as a physically-motivated spectral interpolator. The galaxy model, complemented by a point source and a diffuse background component, is projected onto the SEDm spectro-spatial observation space and adjusted to observations. The full procedure is validated on 5000 simulated cubes. We introduce the contrast as the transient-to-total flux ratio at SN location. From estimated contrast distribution of real SEDm observations, we show that HyperGal correctly classifies ~95% of SNe Ia. Compared to the standard extraction method, HyperGal correctly classifies 10% more SNe Ia. The false positive rate is less than 2%, half as much as the standard extraction method. Assuming a similar contrast distribution for core-collapse SNe, HyperGal classifies 14% (11%) additional SNe II (Ibc).
description: 14 pages, 17 figures, submitted to Astronomy & Astrophysics
On the Reliability Function of the Discrete Memoryless Relay Channel
Creators: name: Tan, Vincent Y. F.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: Bounds on the reliability function for the discrete memoryless relay channel are derived using the method of types. Two achievable error exponents are derived based on partial decode-forward and compress-forward which are well-known superposition block-Markov coding schemes. The derivations require combinations of the techniques involved in the proofs of Csiszár-Körner-Marton's packing lemma for the error exponent of channel coding and Marton's type covering lemma for the error exponent of source coding with a fidelity criterion. The decode-forward error exponent is evaluated on Sato's relay channel. From this example, it is noted that to obtain the fastest possible decay in the error probability for a fixed effective coding rate, one ought to optimize the number of blocks in the block-Markov coding scheme assuming the blocklength within each block is large. An upper bound on the reliability function is also derived using ideas from Haroutunian's lower bound on the error probability for point-to-point channel coding with feedback.
description: To appear in the IEEE Transactions on Information Theory; Presented in part at the 2013 ISIT
Voluntariness of Consent to Research: A Conceptual Model
Creators: name: Appelbaum, Paul S.
name: Lidz, Charles W.
name: Klitzman, Robert L.
Publisher: name: Columbia University
Year: 2009
Subjects: Informed consent (Medical law)
Clinical medicine--Research
Medical ethics

description: A good deal of policy and practice in human subjects research aims to ensure that when subjects consent to research, they do so voluntarily. To date, however, voluntariness and its impairment have been poorly conceptualized and studied. The legal doctrine of informed consent could provide a useful model.
Conical Fireballs, Cannonballs, And Jet-Breaks In The Afterglows Of Gamma Ray Bursts
Creators: name: Dado, Shlomo
name: Dar, Arnon
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The 'jet-break' in the X-ray afterglow of gamma ray bursts (GRBs) appears to be correlated to other properties of the X-ray afterglow and the prompt gamma ray emission, but the correlations are at odds with those predicted by the conical fireball model of GRBs. The correlations are in good agreement, however, with those predicted by the Cannonball model of GRBs.
description: Accepted for publication in Astronomy and Astrophysics
title: Short-term load forecasting of plugged-in electric vehicles
title: Βραχυπρόθεσμη πρόβλεψη φορτίου ηλεκτρικών οχημάτων διασυνδεδεμένων με το δίκτυο
Creators: name: Ιωαννου Βασιλειος
Publisher: name: Technical University of Crete
Year: 2019

description: New reports predict that the penetration levels of electric vehicles will surge across Europe the following years, as zero emissions vehicles become the mainstream item for consumers and vehicle manufacturers will introduce many new full electric models. In certain parts of Europe, like Norway, more than 50% of new car sales are electric. This will result in a heavy electrical power demand that should be predicted.
            Many prediction studies were made, mainly focused on the energy consumed by the vehicle and the time it stayed parked in certain locations. The effect of the electricity price on these prediction models is examined, hoping that it will ease the grid of huge charging loads during peak hours. This is accomplished by using an artificial intelligence algorithm in order to calculate the probability of charging a vehicle and then an optimization algorithm that allots the charging power in time slots based on the electricity price of each slot.
            Results are positive. Less cars are connected to charging stations; the charging of these cars was deemed unnecessary by the algorithm because they had enough energy to return to their home charging stations. The cars that eventually connected required less energy, because again the algorithm charged them with the necessary power only, which led to a load reduction at off-home locations. The optimization algorithm shifted the load towards low-demand time slots, where electricity is cheaper. Furthermore, when grid was on its peak hours, highly charged cars supported it by connecting on it and providing energy (V2G).
An infinite cardinal version of Gallai's Theorem for colorings of the plane
Creators: name: Alm, Jeremy F.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05D10

description: We generalize a result of Tibor Gallai as follows: for any finite set of points $\mathcal{S}$ in the plane, if the plane is colored in finitely many colors, then there exist $2^{\aleph_0}$ monochromatic subsets of the plane homothetic to $\mathcal{S}$. Furthermore, we prove an even stronger result for $n$-dimensional Euclidean space.
description: 7 pages; To appear in Journal of Combinatorics
Complex Fluid Thin Films
Creators: name: KING, JOSHUA PETER
Publisher: name: Monash University
Year: 2023
Subjects: Colloid and surface chemistry

description: Complex fluids are a broad class of soft materials that serve important and useful functions in formulated products and biological systems alike. Typically, complex fluids comprise surfactants, particles, or polymers dispersed in water, which gives rise to unique nano-structure and flow behaviour. This thesis provides new insight into the fundamental role of these properties during thin film dynamics when a complex fluid is entrapped between a bubble and a solid surface. The findings further our understanding of common colloidal interactions, which assists our ability to harness the unique and desirable properties of such materials.
An iterative warping and clustering algorithm to estimate multiple wave-shape functions from a nonstationary oscillatory signal
Creators: name: Colominas, Marcelo A.
name: Wu, Hau-Tieng
Publisher: name: arXiv
Year: 2022
Subjects: subject: Signal Processing (eess.SP)
subject: Functional Analysis (math.FA)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Mathematics

description: Nonsinusoidal oscillatory signals are everywhere. In practice, the nonsinusoidal oscillatory pattern, modeled as a 1-periodic wave-shape function (WSF), might vary from cycle to cycle. When there are finite different WSFs, $s_1,\ldots,s_K$, so that the WSF jumps from one to another suddenly, the different WSFs and jumps encode useful information. We present an iterative warping and clustering algorithm to estimate $s_1,\ldots,s_K$ from a nonstationary oscillatory signal with time-varying amplitude and frequency, and hence the change points of the WSFs. The algorithm is a novel combination of time-frequency analysis, singular value decomposition entropy and vector spectral clustering. We demonstrate the efficiency of the proposed algorithm with simulated and real signals, including the voice signal, arterial blood pressure, electrocardiogram and accelerometer signal. Moreover, we provide a mathematical justification of the algorithm under the assumption that the amplitude and frequency of the signal are slowly time-varying and there are finite change points that model sudden changes from one wave-shape function to another one.
description: 39 pages, 11 figures
title: Βελτιστοποίηση παραγωγής και διαχείρισης ηλεκτρικής ενέργειας σε κτήρια με ενσωματωμένα φωτοβολταϊκά συστήματα
title: Optimization of electric energy production and management in buildings with integrated photovoltaic systems
Creators: name: Γλυκυς Θεοδωρος
Publisher: name: Technical University of Crete
Year: 2019

description: Τα τελευταία χρόνια έχουν αναπτυχθεί νέες τεχνολογίες φωτοβολταϊκών πλαισίων, τα οποία μπορούν να χρησιμοποιηθούν και ως δομικά υλικά σε ένα κτήριο. Σκοπός αυτής της διπλωματικής εργασίας είναι η ελαχιστοποίηση του κόστους παροχής ηλεκτρικής ενέργειας σε κτήρια με ενσωματωμένα φωτοβολταϊκά πλαίσια, βρίσκοντας τον κατάλληλο συνδυασμό διαστασιολόγησης και βελτιστοποίησης της διαχείρισης ενέργειας κατά τη διάρκεια της ημέρας, προγραμματίζοντας χρονικά τις ηλεκτρικές συσκευές με μεγάλη κατανάλωση ενέργειας. Ο αλγόριθμος της παρούσας εργασίας έχει τη δυνατότητα να προσομοιώσει και να βελτιστοποιήσει: α) φωτοβολταϊκό σύστημα διασυνδεδεμένο με το ηλεκτρικό δίκτυο με δυνατότητα αποθήκευσης ενέργειας, β) φωτοβολταϊκό σύστημα διασυνδεδεμένο με το ηλεκτρικό δίκτυο χωρίς δυνατότητα αποθήκευσης ενέργειας και  γ) πλήρως αυτόνομο φωτοβολταϊκό σύστημα χωρίς διασύνδεση με το ηλεκτρικό δίκτυο. Η καινοτομία σε σχέση με τις υπάρχουσες τεχνικές σχεδίασης είναι η εύρεση του βέλτιστου συνδυασμού διαστασιολόγησης βρίσκοντας παράλληλα και τη βέλτιστη ώρα έναρξης λειτουργίας των ηλεκτρικών συσκευών του κτηρίου. Αυτός ο συνδυασμός βελτιστοποίησης  μπορεί να προσφέρει μέχρι και 10% μείωση του καθαρού κόστους παροχής ηλεκτρικής ενέργειας στο κτήριο σε σχέση με τις υπάρχουσες τεχνικές σχεδιασμού φωτοβολταϊκών συστημάτων.
description: In the past few years we've seen a growth in the development of photovoltaic panels that can be used as structural materials in buildings. The purpose of this dissertation is to minimize the cost of energy production in such constructions by finding the optimal combination of productive area and energy management methods throughout the daily and seasonal cycles using schedules for each electric appliance based on their use and power requirements. The algorithm developed for this study can simulate and optimize: a) PV system connected to the electrical grid and battery arrays, b) PV systems connected only to the power grid and c) completely autonomous PV system. The innovation presented here is the discovery of the optimal combination of productive area and operating times for the most power hungry appliances in a building.This combination can offer up to a 10% decrease in the net energy costs of the building when compared to existing PV system design methodologies.
Dynamic Ising Model: Reconstruction of Evolutionary Trees
Creators: name: de Oliveira, Paulo Murilo Castro
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantitative Methods (q-bio.QM)
subject: Populations and Evolution (q-bio.PE)
subject: FOS: Biological sciences

description: An evolutionary tree is a cascade of bifurcations starting from a single common root, generating a growing set of daughter species as time goes by. Species here is a general denomination for biological species, spoken languages or any other entity evolving through heredity. From the N currently alive species within a clade, distances are measured through pairwise comparisons made by geneticists, linguists, etc. The larger is such a distance for a pair of species, the older is their last common ancestor. The aim is to reconstruct the past unknown bifurcations, i.e. the whole clade, from the knowledge of the N(N-1)/2 quoted distances taken for granted. A mechanical method is presented, and its applicability discussed.
description: 8 pages, 4 figures
title: Σχεδίαση δυναμικά αναδιατασσόμενων φωτοβολταϊκών συστοιχιών για μεγιστοποίηση της παραγωγής ενέργειας φωτοβολταϊκών συστημάτων

title: Design of dynamically reconfigurable photovoltaic arrays for maximizing the energy production of photovoltaic systems
Creators: name: Ισκης Νικολαος
Publisher: name: Technical University of Crete
Year: 2019

description: Τα φωτοβολταϊκά συστήματα συχνά αντιμετωπίζουν φαινόμενα μερικής σκίασης, τα οποία επηρεάζουν αρνητικά την ενεργειακή τους απόδοση. Στόχος της παρούσας διπλωματικής εργασίας είναι η σχεδίαση δυναμικά αναδιατασσόμενων φωτοβολταϊκών συστοιχιών με σκοπό τη μεγιστοποίηση της παραγόμενης ισχύος. Η διαφορά από τις συμβατικές φωτοβολταϊκές συστοιχίες είναι η χρήση διακοπτών, με τους οποίους επιτυγχάνεται η αναδιάταξη των ηλεκτρικών συνδέσεων μεταξύ των φωτοβολταϊκών πλαισίων της συστοιχίας. Τα σήματα ελέγχου των διακοπτών παράγονται από τους αλγορίθμους αναδιάταξης που χρησιμοποιούνται. Στο πλαίσιο αυτής της διπλωματικής εργασίας σχεδιάστηκε και προσομοιώθηκε σε περιβάλλον MΑTLAB/SIMULINK φωτοβολταϊκό σύστημα αποτελούμενο από αναδιατασσόμενη φωτοβολταϊκή συστοιχία, μετατροπέα ισχύος και μονάδα ελέγχου για τη μεγιστοποίηση της παραγόμενης ισχύος (Maximum Power Point Tracking, MPPT) και την αναδιάταξη των φωτοβολταϊκών πλαισίων στη συστοιχία με τρεις εναλλακτικούς αλγορίθμους αναδιάταξης. Η παραγωγή ενέργειας των αναδιατασσόμενων φωτοβολταϊκών συστοιχιών συγκρίθηκε σε διάφορες συνθήκες σκίασης με την παραγωγή ενέργειας που προκύπτει εφαρμόζοντας την τοπολογία  Module-Integrated Converter, η οποία επίσης  προσομοιώθηκε μέσω κατάλληλου μοντέλου που αναπτύχθηκε στο περιβάλλον MΑTLAB/SIMULINK.​​​​​​​
description: Photovoltaic systems often face partial shadowing phenomena, which adversely affect their energy efficiency. The purpose of this thesis is to design dynamically reconfigurable photovoltaic arrays in order to maximize the output power. The difference from conventional photovoltaic arrays is the use of switches that rearrange the electrical connections between the photovoltaic panels of the array. Switch control signals are generated by the rearrangement algorithms. As part of this thesis, a MATLAB / SIMULINK photovoltaic system consisting of a reconfigurable photovoltaic array, a power converter and a control unit to maximize the output power (Maximum Power Point Tracking, MPPT) and photovoltaic panels was designed and simulated three alternative rearrangement algorithms. The output power of the reconfigurable photovoltaic arrays was compared under various shading conditions with the resulting output power applying the Module-Integrated Converter topology, which was also simulated using a suitable model developed in the MATLAB / SIMULINK environment.
title: COVID-19 Crisis: Lessons Learned for Future Policy Research
Creators: name: Fontaine, Jean-Sébastien
name: Garriott, Corey
name: Johal, Jesse
name: Lee, Jessica
name: Uthemann, Andreas
Publisher: name: Bank of Canada
Year: 2021

description: One year later, we review the events that took place in Canadian fixed-income markets at the beginning of the COVID-19 crisis and propose potential policy research questions for future work.

description: Après un an, nous examinons ce qui s’est passé sur les marchés canadiens des titres à revenu fixe au début de la crise de la COVID-19 et proposons des questions qui pourraient faire l’objet de futurs travaux de recherche sur les politiques.
The superconducting energy gap in the hole-doped graphene beyond the Migdal's theory
Creators: name: Kaczmarek, Adam Z.
name: Drzazga-Szczęśniak, Ewa A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: In this work we analyze impact of non-adiabatic effects on the superconducting energy gap in the hole-doped graphene. By using the Eliashberg formalism beyond the Migdal's theorem, we present that the non-adiabatic effects strongly influence the superconducting energy gap in the exemplary boron-doped graphene. In particular, the non-adiabatic effects, as represented by the first order vertex corrections to the electron-phonon interaction, supplement Coulomb depairing correlations and suppress the superconducting state. In summary, the obtained results confirm previous studies on superconductivity in two-dimensional materials and show that the corresponding superconducting phase may be notably affected by the non-adiabatic effects.
description: conference material, 4 pages, 2 figures
Characterizing N-dimensional anisotropic Brownian motion by the distribution of diffusivities
Creators: name: Heidernätsch, Mario
name: Bauer, Michael
name: Radons, Günter
Publisher: name: arXiv
Year: 2013
Subjects: subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Anisotropic diffusion processes emerge in various fields such as transport in biological tissue and diffusion in liquid crystals. In such systems, the motion is described by a diffusion tensor. For a proper characterization of processes with more than one diffusion coefficient an average description by the mean squared displacement is often not sufficient. Hence, in this paper, we use the distribution of diffusivities to study diffusion in a homogeneous anisotropic environment. We derive analytical expressions of the distribution and relate its properties to an anisotropy measure based on the mean diffusivity and the asymptotic decay of the distribution. Both quantities are easy to determine from experimental data and reveal the existence of more than one diffusion coefficient, which allows the distinction between isotropic and anisotropic processes. We further discuss the influence on the analysis of projected trajectories, which are typically accessible in experiments. For the experimentally relevant cases of two- and three-dimensional anisotropic diffusion we derive specific expressions, determine the diffusion tensor, characterize the anisotropy, and demonstrate the applicability for simulated trajectories.
description: v2: 14 pages, 4 figures, added section about curvature, added references, several clarifications and enhancements; v1: 13 pages, 4 figures
title: Αλγόριθμοι αναγνώρισης εξεχουσών τιμών σε δίκτυα αισθητήρων
Creators: name: Ιγγλεζάκης Αντώνιος
Publisher: name: Technical University of Crete
Year: 2012

description: Μη διαθέσιμο