cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Perception experiment
Creators: name: Oakley, Madeleine
name: Sande, Hannah
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2022
Subjects: subject: dic

description: Two researchers ran a series of perception experiments with Guébie-speaking participants in Gnagbodougnoa, Côte d'Ivoire in the summer of 2018 with the goal of investigating how implosive sounds are categorized, and which sounds they are perceived as being similar to. The responses of each participant are found herein. File names contain the following information: number of participant (if the number is preceded by 'G', the respondent was a Guébie speaker, otherwise the participants are English speakers), condition type, date.
Multiple normalized solutions for a Sobolev critical Schrödinger-Poisson-Slater equation
Creators: name: Jeanjean, Louis
name: Le, Thanh Trung
Publisher: name: arXiv
Year: 2021
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: We look for solutions to the Schrödinger-Poisson-Slater equation $$- Δu + λu - γ(|x|^{-1} * |u|^2) u - a |u|^{p-2}u = 0 \quad \text{in} \quad \mathbb{R}^3, $$ which satisfy \begin{equation*} \int_{\mathbb{R}^3}|u|^2 \, dx = c \end{equation*} for some prescribed $c>0$. Here $ u \in H^1(\mathbb{R}^3)$, $γ\in \mathbb{R},$ $ a \in \mathbb{R}$ and $p \in (\frac{10}{3}, 6]$. When $γ>0$ and $a > 0$, both in the Sobolev subcritical case $p \in (\frac{10}{3}, 6)$ and in the Sobolev critical case $p=6$, we show that there exists a $c_1>0$ such that, for any $c \in (0,c_1)$, the equation admits two solutions $u_c^+$ and $u_c^-$ which can be characterized respectively as a local minima and as a mountain pass critical point of the associated {\it Energy} functional restricted to the norm constraint. In the case $γ>0$ and $a < 0$, we show that, for any $p \in (\frac{10}{3},6]$ and any $c>0$, the equation admits a solution which is a global minimizer. Finally, in the case $γ<0$, $a >0$ and $p=6$ we show that it does not admit positive solutions.
description: This version is the final one, corresponding to the paper now published in Journal of Differential Equations
A semi-variational approach to QCD at finite temperature and baryon density
Creators: name: Palumbo, Fabrizio
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: Recently a new bosonization method has been used to derive, at zero fermion density, an effective action for relativistic field theories whose partition function is dominated by fermionic composites, chiral mesons in the case of QCD. This approach shares two important features with variational methods: the restriction to the subspace of the composites, and the determination of their structure functions by a variational calculation. But unlike standard variational methods it treats excited states at the same time and on the same footing as the ground state. I extend this method including states of nonvanishing fermion (baryon) number and derive an effective action for QCD at finite temperature and baryon density. I test the result on a four-fermion interaction model.
Design and Evaluation of Monolithic Computers Implemented Using Crossbar ReRAM
Creators: name: Jagasivamani, Meenatchi
name: Walden, Candace
name: Singh, Devesh
name: Li, Shang
name: Kang, Luyi
name: Asnaashari, Mehdi
name: Dubois, Sylvain
name: Jacob, Bruce
name: Yeung, Donald
Publisher: name: Digital Repository at the University of Maryland
Year: 2019

description: A monolithic computer is an emerging architecture in which a multicore CPU and a high-capacity main memory system are all integrated in a single die. We believe such architectures will be possible in the near future due to nonvolatile memory technology, such as the resistive random access memory, or ReRAM, from Crossbar Incorporated. Crossbar's ReRAM can be fabricated in a standard CMOS logic process, allowing it to be integrated into a CPU's die. The ReRAM cells are manufactured in between metal wires and do not employ per-cell access transistors, leaving the bulk of the base silicon area vacant. This means that a CPU can be monolithically integrated directly underneath the ReRAM memory, allowing the cores to have massively parallel access to the main memory. This paper presents the characteristics of Crossbar's ReRAM technology, informing architects on how ReRAM can enable monolithic computers. Then, it develops a CPU and memory system architecture around those characteristics, especially to exploit the unprecedented memory-level parallelism. The architecture employs a tiled CPU, and incorporates memory controllers into every compute tile that support a variable access granularity to enable high scalability. Lastly, the paper conducts an experimental evaluation of monolithic computers on graph kernels and streaming computations. Our results show that compared to a DRAM-based tiled CPU, a monolithic computer achieves 4.7x higher performance on the graph kernels, and achieves roughly parity on the streaming computations. Given a future 7nm technology node, a monolithic computer could outperform the conventional system by 66% for the streaming computations.
Optical end point sensing and digital control of a scanning tunneling microscope
Creators: name: Chahal, Anthony M.
Publisher: name: University of British Columbia
Year: 2008

description: The problem addressed in this thesis is that of digitally controlling a Scanning Tunneling Microscope and implementing end point sensing to close the control loop for accurate X-Y positioning of the microscope tip. This first part entails modifying a microscope with an analog controller so that it may be interfaced to a DSP system running on a personal computer. The second part is designing and incorporating an optical end point sensor into the head of the microscope to improve absolute position control of the tip in the scanning plane by overcoming hysteresis and creep in the piezoelectric scanning tube actuator. The sensor would also improve the repeatability of imaging and facilitate random access positioning of the tip to allow for more sophisticated scanning trajectories. The digital controller was successfully implemented. Images of sputtered gold obtained with the new controller were of comparable quality to those obtained using a microscope under analog control. A single axis version of the sensor was developed which was used independently of the microscope to measure the hysteresis and creep that were present in the piezoelectric actuator. The sensor had a resolution of 8.5 nm, but was not completely integrated into the digital control and imaging system.
A database of travel-related behaviors and attitudes before, during, and after COVID-19 in the United States
Creators: name: Chauhan, Rishabh Singh
name: Conway, Matthew Wigginton
name: da Silva, Denise Capasso
name: Salon, Deborah
name: Shamshiripour, Ali
name: Rahimi, Ehsan
name: Khoeini, Sara
name: Mohammadian, Abolfazl
name: Derrible, Sybil
name: Pendyala, Ram
Publisher: name: arXiv
Year: 2021
Subjects: subject: Applications (stat.AP)
subject: FOS: Computer and information sciences

description: The COVID-19 pandemic has impacted billions of people around the world. To capture some of these impacts in the United States, we are conducting a nationwide longitudinal survey collecting information about activity and travel-related behaviors and attitudes before, during, and after the COVID-19 pandemic. The survey questions cover a wide range of topics including commuting, daily travel, air travel, working from home, online learning, shopping, and risk perception, along with attitudinal, socioeconomic, and demographic information. The survey is deployed over multiple waves to the same respondents to monitor how behaviors and attitudes evolve over time. Version 1.0 of the survey contains 8,723 Wave 1 responses that are publicly available. This article details the methodology adopted for the collection, cleaning, and processing of the data. In addition, the data are weighted to be representative of national and regional demographics. This survey dataset can aid researchers, policymakers, businesses, and government agencies in understanding both the extent of behavioral shifts and the likelihood that changes in behaviors will persist after COVID-19.
Games and Gaming of the Stuart Aristocracy
Creators: name: Sanderlin, Vicky Ann
Publisher: name: Old Dominion University Libraries
Year: 1981

description: Games and gaming provide insight into the lives of the people of the past. This thesis analyzes the games and gaming patterns of the aristocracy of Stuart England. This examination of gaming concentrates on the place of leisure games in the world of the elite. The study focuses on games suitable for inclement weather and includes both children's and adult's games from the period.

This thesis addresses three basic questions: 1) who were the gamesters, 2) when and where did they game, and 3) what games did they play and how did they play them? Answers to these questions have provided clues to several aspects of seventeenth century gaming in England. Traditional and customary gaming, regulation of gaming, professionalism in gaming, and the expansion of gaming locales and the intensity and frequency of play are prominent patterns which are investigated in this thesis. The study also provides a catalogue of the most popular games during the Stuart era. The rules, notable players, and history of the games are delinated.

Finally, the social context of Stuart England is examined as it relates to gaming. The political, economic, religious, and social turmoil of the era which includes the Civil Wars, the Restoration, and the Glorious Revolution, forms the background for an investigation of the gaming of the Stuart aristocracy. The conclusion is that leisure time use is directly keyed to the rapidly changing world of Stuart England.
Radial Transport in the Solar Nebula: Implications for Moderately Volatile Element Depletions in Chondritic Meteorites
Creators: name: Ciesla, Fred J.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In this paper, the possibility that the moderately volatile element depletions observed in chondritic meteorites are the results of planetesimals accreting in a solar nebula that cooled from an initially hot state (temperatures > 1350 K out to ~2-4 AU) is explored. A model is developed to track the chemical inventory of planetesimals that accrete in a viscously evolving protoplanetary disk, accounting for the redistribution of solids and vapor by advection, diffusion, and gas drag. It is found that depletion trends similar to those observed in the chondritic meteorites can be reproduced for a small range of model parameters. However, the necessary range of parameters is inconsistent with observations of disks around young stars and other constraints on meteorite parent body formation. Thus, counter to previous work, it is concluded that the global scale evolution of the solar nebula is not the cause for the observed depletion trends.
description: 31 pages, 9 Figures, 1 Table. Revised for Meteoritics & Planetary Science (sorry, they do not accept LaTeX)
Statistically-Robust Clustering Techniques for Mapping Spatial Hotspots: A Survey
Creators: name: Xie, Yiqun
name: Shekhar, Shashi
name: Li, Yan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (stat.ML)
subject: Machine Learning (cs.LG)
subject: Computation (stat.CO)
subject: FOS: Computer and information sciences

description: Mapping of spatial hotspots, i.e., regions with significantly higher rates of generating cases of certain events (e.g., disease or crime cases), is an important task in diverse societal domains, including public health, public safety, transportation, agriculture, environmental science, etc. Clustering techniques required by these domains differ from traditional clustering methods due to the high economic and social costs of spurious results (e.g., false alarms of crime clusters). As a result, statistical rigor is needed explicitly to control the rate of spurious detections. To address this challenge, techniques for statistically-robust clustering (e.g., scan statistics) have been extensively studied by the data mining and statistics communities. In this survey we present an up-to-date and detailed review of the models and algorithms developed by this field. We first present a general taxonomy for statistically-robust clustering, covering key steps of data and statistical modeling, region enumeration and maximization, and significance testing. We further discuss different paradigms and methods within each of the key steps. Finally, we highlight research gaps and potential future directions, which may serve as a stepping stone in generating new ideas and thoughts in this growing field and beyond.
description: 39 pages, 5 figures, accepted by ACM Computing Surveys (CSUR)
Μελέτη παραγοντοποίησης της ισατίνης και των παραγώγων της προς τις αντίστοιχες υδραζονο-υποκατεστημένες ενώσεις
Creators: name: Παπάζογλου, Βασιλική Παναγιώτη
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Ισατίνη
Υδραζονο-υποκατεστημένα παράγωγα ισατίνης
Προσθήκη Michael
Isatin
Hydrazono-substituted isatin compounds
Michael addition

description: Στα πλαίσια της παρούσας διπλωματικής εργασίας έγινε προσπάθεια σύνθεσης υδραζονο-υποκατεστημένων ενώσεων της ισατίνης καθώς και προσπάθεια σύνθεσης σπείρο-υδράζονο-δακτυλίων των παραγώγων αυτών. Η μελέτη παραγοντοποίησης της ισατίνης και των Ν-υποκατεστημένων παραγώγων της προς τις αντίστοιχες υδραζονο-υποκατεστημένες ενώσεις, που διεξήχθη στο εργαστήριο μας, οδήγησε σε μία σειρά ενώσεων που συντέθηκαν για πρώτη φορά. Ακολουθήθηκαν δύο πορείες σύνθεσης που στόχευαν στην επίτευξη δύο διαφορετικών συνθετικών στόχων. Ο κοινός τόπος των δύο είναι ότι και οι δύο τάξεις ενώσεων ήταν υδραζονο-υποκατεστημένα παράγωγα της ισατίνης. Ο πρώτος στόχος ήταν η σύνθεση σπείρο-κυκλικών παραγώγων της ισατίνης μέσω αντιδράσεων υδραζονών. Ο δεύτερος στόχος της συγκεκριμένης εργασίας ήταν η σύνθεση διϋδρο-τριαζεπινονο-ανιλινών ή/και δίϋδρο-τριαζεπινο-ανιλινών, μέσω προσθήκης Michael, χρησιμοποιώντας διαφορετικά νιτροστυρόλια κάθε φορά και έπειτα με αναγωγή και κυκλοποίηση των προιόντων που προέκυψαν από την προσθήκη Michael. Η αντίδραση των υδραζονών της ισατίνης με τα β-υποκατεστημένα νιτροστυρόλια επετεύχθη και έδωσε προϊόντα προσθήκης Michael σε ικανοποιητικές αποδόσεις.
description: During the completion of this master thesis tries of hydrazono-substituted compounds of isatin synthesis have been made. A functionalization study of isatin and its N-substituted derivatives to the corresponding hydrazono-substituted compounds that was carried out in our laboratory lead to a series of chemical compounds that were synthesized for the first time. Two different pathways were followed aiming at the composition of two different synthetic goals. Both of them were hydrazo-substituted derivatives of isatin. Synthesis of spiro-cyclic derivatives of isatin via hydrazones reactions was the first target. The products resulting from Michael-reaction to hydrazono-isatin and its N-substituted derivatives using variant nitrostyrenes was the second synthetic goal of this thesis. The reaction of isatin hydrazones with β-substituted nitrostyrenes was successful and gave high product yields. Synthesis of these isatin derivatives was achieved while using mild conditions within a relatively short reaction time. Also there was no need of catalysts.
Διαδικτυακή οκνηρία στο χώρο εργασίας
Creators: name: Ηλιάδου, Βασιλική Αγγελάκη
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Διαδικτυακή οκνηρία
Εργασιακή ικανοποίηση
Εργασιακή απόδοση
Εθιστική διαδικτυακή χρήση
Κατάχρηση Διαδικτύου
Cyberloafing
Job Satisfaction
Job Performance
Addictive Internet use
Internet abuse

description: Αδιαμφισβήτητο γεγονός αποτελεί η συμβολή του Διαδικτύου και γενικότερα της τεχνολογίας στην ανταλλαγή και διάδοση της πληροφορίας, την ανάπτυξη της επικοινωνίας, την παροχή ψυχαγωγίας και την παρακολούθηση του ανταγωνισμού από τις επιχειρήσεις και τους οργανισμούς. Η εμφάνιση των κοινωνικών δικτύων και των μέσων κοινωνικής δικτύωσης έχει επιφέρει σημαντικές αλλαγές στην καθημερινότητα εκατομμυρίων ανθρώπων παγκοσμίως που αφορούν το προσωπικό και το επαγγελματικό περιβάλλον του κάθε χρήστη. Την τεχνολογική εξέλιξη και ακολούθως τη διαδικτυακή συμπεριφορά καλούνται να αντιμετωπίσουν οι επιχειρήσεις και οι οργανισμοί οριοθετώντας τα πλαίσια μιας επιθυμητής και συνάμα επιτρεπτής χρήσης του Διαδικτύου στο εργασιακό περιβάλλον. Η παρούσα έρευνα διερευνά την κατάχρηση του Διαδικτύου κατά τις ώρες εργασίας, ή αλλιώς, τη “διαδικτυακή οκνηρία”, φαινόμενο που απασχολεί ολοένα και περισσότερο τις επιχειρήσεις και τους οργανισμούς αφού επηρεάζει άμεσα την εξέλιξη και τη βιωσιμότητά τους σε ένα ανταγωνιστικό περιβάλλον. Ειδικότερα, μελετώνται τα πιθανά αίτια και αποτελέσματα του φαινομένου αυτού και η συσχέτιση του με την εργασιακή ικανοποίηση και απόδοση. Στην έρευνα αυτή συμμετείχαν συνολικά 167 εργαζόμενοι στην Ελλάδα, διαφόρων εργασιακών καθεστώτων και ακαδημαϊκού υπόβαθρου. Μέσω της χρήσης δομημένου ηλεκτρονικού ερωτηματολογίου αναδείχθηκε η αρνητική συσχέτιση μεταξύ της “διαδικτυακής οκνηρίας” και της εργασιακής απόδοσης αλλά και της εργασιακής ικανοποίησης. Ακολούθως, διατυπώνονται προτάσεις με στόχο την άμβλυνση του προβλήματος και παρατίθενται ιδέες για περαιτέρω έρευνα σε μεταβλητές που δεν έχουν έως τώρα μελετηθεί.
description: There is no doubt around the huge contribution of the internet and technology in general in the exchange and distribution of information, the development of communication, the creation of entertainment and the competition monitoring in business environment. The advent of social media and communication technologies has changed our everyday lives be that may personal or professional. The current thesis investigates the abuse of networking during work hours - or “cyberloafing” - occurance increasingly burdening businesses and organizations, directly affecting their development and sustainability in a competitive environment. Specifically, attention is paid to the possible causes and effects of this phenomenon and its correlation to job satisfaction and work performance. The survey involved a total of 167 employees in Greece, in various work status and academic backgrounds. The results of the structured online questionnaire indicated that there is a negative correlation of “cyberloafing” to job satisfaction and work performance. Afterwards, proposals that touch upon the lessening of the problem are put forward, and finally, specific research topics are suggested.
Excess entropy, Diffusivity and Structural Order in liquids with water-like anomalies
Creators: name: Sharma, Ruchi
name: Chakraborty, Somendra Nath
name: Chakravarty, Charusita
Publisher: name: arXiv
Year: 2006
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: The excess entropy, Se, defined as the difference between the entropies of the liquid and the ideal gas under identical density and temperature conditions, is shown to be the critical quantity connecting the structural, diffusional and density anomalies in water-like liquids. Based on simulations of silica and the two-scale ramp liquids, water-like density and diffusional anomalies can be seen as consequences of a characteristic non-monotonic density dependence of Se. The relationship between excess entropy, the order metrics and the structural anomaly can be understood using a pair correlation approximation to Se.
description: 9 pages, 5 figues in ps format
Tropicalization and irreducibility of Generalized Vandermonde Determinants
Creators: name: D'Andrea, Carlos
name: Tabera, Luis Felipe
Publisher: name: arXiv
Year: 2008
Subjects: subject: Commutative Algebra (math.AC)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 12E05; 14M12

description: We find geometric and arithmetic conditions in order to characterize the irreducibility of the determinant of the generic Vandermonde matrix over the algebraic closure of any field k. We also characterize those determinants whose tropicalization with respect to the variables of a row is irreducible.
description: 10 pages, AMSart. Revised version to appear in Proceedings of the AMS
Jacobi multipliers and Hojman symmetry
Creators: name: Cariñena, José F.
name: Rañada, Manuel F.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 70G45, 70H03, 70H05

description: The geometric intrinsic approach to Hojman symmetry is developed and use is made of the theory of the Jacobi last multipliers to find the corresponding conserved quantity for non divergence-free vector fields. The particular cases of autonomous Lagrangian and Hamiltonian systems are studied as well as the generalization of these results to normalizer vector fields of the dynamics. The nonautonomous cases, where normalizer vector fields play a relevant role, are also developed.
Black hole evaporation in de Sitter space
Creators: name: Gregory, Ruth
name: Moss, Ian G.
name: Oshita, Naritaka
name: Patrick, Sam
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We investigate the evaporation process of a Kerr-de Sitter black hole with the Unruh-Hawking-like vacuum state, which is a realistic vacuum state modelling the evaporation process of a black hole originating from gravitational collapse. We also compute the greybody factors for gravitons, photons, and conformal-coupling massless scalar particles by using the analytic solutions of the Teukolsky equation in the Kerr-de Sitter background. It turns out that the cosmological constant quenches the amplification factor and it approaches to zero towards the critical point where the Nariai and extremal limits merge together. We confirm that even near the critical point, the superradiance of gravitons is more significant than that of photons and scalar particles. Angular momentum is carried out by particles several times faster than the mass energy decreases. This means that a Kerr-de Sitter black hole rapidly spins down to a nearly Schwarzschild-de Sitter black hole before it completely evaporates. We also compute the time evolution of the Bekenstein-Hawking entropy. The total entropy of the Kerr-de Sitter black hole and cosmological horizon increases with time, which is consistent with the generalized second law of thermodynamics.
description: 32 pages, 16 figures, version accepted by CQG
Relative $C$"-Numerical Ranges for Applications in Quantum Control and Quantum Information
Creators: name: Dirr, G.
name: Helmke, U.
name: Kleinsteuber, M.
name: Schulte-Herbrueggen, T.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Motivated by applications in quantum information and quantum control, a new type of $C$"-numerical range, the relative $C$"-numerical range denoted $W_K(C,A)$, is introduced. It arises upon replacing the unitary group U(N) in the definition of the classical $C$"-numerical range by any of its compact and connected subgroups $K \subset U(N)$. The geometric properties of the relative $C$"-numerical range are analysed in detail. Counterexamples prove its geometry is more intricate than in the classical case: e.g. $W_K(C,A)$ is neither star-shaped nor simply-connected. Yet, a well-known result on the rotational symmetry of the classical $C$"-numerical range extends to $W_K(C,A)$, as shown by a new approach based on Lie theory. Furthermore, we concentrate on the subgroup $SU_{\rm loc}(2^n) := SU(2)\otimes ... \otimes SU(2)$, i.e. the $n$-fold tensor product of SU(2), which is of particular interest in applications. In this case, sufficient conditions are derived for $W_{K}(C,A)$ being a circular disc centered at origin of the complex plane. Finally, the previous results are illustrated in detail for $SU(2) \otimes SU(2)$.
description: accompanying paper to math-ph/0701035
Human-Robot Handshaking: A Review
Creators: name: Prasad, Vignesh
name: Stock-Homburg, Ruth
name: Peters, Jan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Robotics (cs.RO)
subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences

description: For some years now, the use of social, anthropomorphic robots in various situations has been on the rise. These are robots developed to interact with humans and are equipped with corresponding extremities. They already support human users in various industries, such as retail, gastronomy, hotels, education and healthcare. During such Human-Robot Interaction (HRI) scenarios, physical touch plays a central role in the various applications of social robots as interactive non-verbal behaviour is a key factor in making the interaction more natural. Shaking hands is a simple, natural interaction used commonly in many social contexts and is seen as a symbol of greeting, farewell and congratulations. In this paper, we take a look at the existing state of Human-Robot Handshaking research, categorise the works based on their focus areas, draw out the major findings of these areas while analysing their pitfalls. We mainly see that some form of synchronisation exists during the different phases of the interaction. In addition to this, we also find that additional factors like gaze, voice facial expressions etc. can affect the perception of a robotic handshake and that internal factors like personality and mood can affect the way in which handshaking behaviours are executed by humans. Based on the findings and insights, we finally discuss possible ways forward for research on such physically interactive behaviours.
description: Pre-print version. Accepted for publication in the International Journal of Social Robotics
An asynchronous telephone speech scrambler with a new key generation method
Creators: name: Woo, Raymond W. M.
Publisher: name: University of British Columbia
Year: 2008

description: The design of an asynchronous telephone speech scrambler is proposed and its performance experimentally studied. The scrambler transforms the speech signal into a scrambled form by permuting the frequency coefficients of the speech signal. These coefficients are permuted in pairs instead of individually. Subjective tests indicate that such an arrangement results in an improvement in descrambled speech quality but no increase in the residual intelligibility of the scrambled speech signal. A new criterion for selecting good scrambling permutations known as the derangement criterion is introduced. Subjective tests based on the number test confirm that keys satisfying this criterion are able to produce scrambled speech with virtually no residual intelligibility. A new derangement generation algorithm is introduced. This algorithm maps an integer g, in the range of 0 ≤ g < (n - 1)!, uniquely to a derangement of n elements.
'Real' gerbes and Dirac cones of topological insulators
Creators: name: Gomi, Kiyonori
name: Thiang, Guo Chuan
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Mathematical Physics (math-ph)
subject: Differential Geometry (math.DG)
subject: K-Theory and Homology (math.KT)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: A time-reversal invariant topological insulator occupying a Euclidean half-space determines a 'Quaternionic' self-adjoint Fredholm family. We show that the discrete spectrum data for such a family is geometrically encoded in a non-trivial 'Real' gerbe. The gerbe invariant, rather than a naïve counting of Dirac points, precisely captures how edge states completely fill up the bulk spectral gap in a topologically protected manner.
description: 57 pages, 3 figures, revised version for publication in CMP
CharacterChat: Supporting the Creation of Fictional Characters through Conversation and Progressive Manifestation with a Chatbot
Creators: name: Schmitt, Oliver
name: Buschek, Daniel
Publisher: name: arXiv
Year: 2021
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences
subject: H.5.2; I.2.7

description: We present CharacterChat, a concept and chatbot to support writers in creating fictional characters. Concretely, writers progressively turn the bot into their imagined character through conversation. We iteratively developed CharacterChat in a user-centred approach, starting with a survey on character creation with writers (N=30), followed by two qualitative user studies (N=7 and N=8). Our prototype combines two modes: (1) Guided prompts help writers define character attributes (e.g. User: "Your name is Jane."), including suggestions for attributes (e.g. Bot: "What is my main motivation?") and values, realised as a rule-based system with a concept network. (2) Open conversation with the chatbot helps writers explore their character and get inspiration, realised with a language model that takes into account the defined character attributes. Our user studies reveal benefits particularly for early stages of character creation, and challenges due to limited conversational capabilities. We conclude with lessons learned and ideas for future work.
description: 14 pages, 2 figures, 2 tables; ACM C&C 2021
Thomas Sully (1783-1872): Beginning Portraitist in Norfolk
Creators: name: Rossheim, Beth N.
Publisher: name: Old Dominion University Libraries
Year: 1981

description: An examination of the Register of Paintings and Journal of Activities written by Thomas Sully reveals his attempt to begin a painting career in Norfolk, Virginia, 1801-1803. A discussion of portraiture in America in the early 19th century precedes the investigation of the Sully family, their theatrical background and influence on Thomas Sully. Descriptive material on Norfolk is provided as background to a close study of Sully's earliest patrons Several early portraits are presented to demonstrate a progressive sophistication.
Prospects for the detection of the prompt very-high-energy emission from $\rmγ$-ray bursts with the High Altitude Detection of Astronomical Radiation experiment
Creators: name: Xin, Guang-Guang
name: Yao, Yu-Hua
name: Qian, Xiang-Li
name: Liu, Cheng
name: Gao, Qi
name: Dan-Zeng-Luo-Bu
name: Feng, You-Liang
name: Gou, Quan-Bu
name: Hu, Hong-Bo
name: Li, Hai-Jin
name: Liu, Mao-Yuan
name: Liu, Wei
name: Qiao, Bing-Qiang
name: Wang, Zhen
name: Zhang, Yi
name: Cai, Hao
name: Chen, Tian-Lu
name: Guo, Yi-Qing
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The observation of very-high-energy (VHE, $\rm >10~GeV$) $γ$-ray emission from $\rm γ$-ray bursts (GRBs), especially in the prompt phase, will provide critical information for understanding many aspects of their nature including the physical environment, the relativistic bulk motion, the mechanisms of particle acceleration of GRBs and for studying Lorentz invariance violation, etc. For the afterglow phase, the highest energy photons detected to date by the imaging atmospheric Cherenkov telescopes extend to the TeV regime. However, for the prompt phase, years of efforts in searching for the VHE emission has yielded no statistically significant detections. A wide field-of-view (FOV) and large effective area above tens of GeV are essential for detecting the VHE emissions from GRBs in the prompt phase. The High Altitude Detection of Astronomical Radiation (HADAR) experiment has such merits. In this paper, we report the estimates of its expected annual GRB detection rate, which are obtained by combining the performance of the HADAR instrument with the theoretical calculations based on a phenomenological model to generate the pseudo-GRB population. The expected detectable gamma-ray signal from GRBs above the background is then obtained to give the detection rate. In the spectral model, an extra component is assigned to every GRB event in addition to the Band function. The results indicate that if the energy of the cutoff due to internal absorption is higher than 50 GeV, the detection rate for GRBs for the HADAR experiment is approximately two or three GRBs per year, which varies slightly depending upon the characteristics of the extra component.
description: accepted by ApJ
Random walk approach to the analytic solution of random systems with multiplicative noise - the Anderson localization problem
Creators: name: Kuzovkov, V. N.
name: von Niessen, W.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We discuss here in detail a new analytical random walk approach to calculating the phase-diagram for spatially extended systems with multiplicative noise. We use the Anderson localization problem as an example. The transition from delocalized to localized states is treated as a generalized diffusion with a noise-induced first-order phase transition. The generalized diffusion manifests itself in the divergence of averages of wavefunctions (correlators). This divergence is controlled by the Lyapunov exponent $γ$, which is the inverse of the localization length, $ξ=1/γ$. The appearance of the generalized diffusion arises due to the instability of a fundamental mode corresponding to correlators. The generalized diffusion can be described in terms of signal theory, which operates with the concepts of input and output signals and the filter function. Delocalized states correspond to bounded output signals, and localized states to unbounded output signals, respectively. The transition from bounded to unbounded signals is defined uniquely by the filter function $H(z)$.
description: 23 pages, 2 figures
Thermomechanical analysis of strain recovery in shape memory alloys under variable non-isothermal conditions
Creators: name: Descher, Stefan
name: Krooß, Philipp
name: Ewald, Felix
name: Kuhl, Detlef
Publisher: name: Universität Kassel
Year: 2024
Subjects: subject: 600
subject: Thermomechanik
subject: Dehnung
subject: Memory-Legierung

description: Gefördert im Rahmen des Projekts DEAL
Additional file 2 of Circulating dipeptidyl peptidase-3 at admission is associated with circulatory failure, acute kidney injury and death in severely ill burn patients
Creators: name: Dépret, François
name: Amzallag, Juliette
name: Pollina, Adrien
name: Fayolle-Pivot, Laure
name: Coutrot, Maxime
name: Chaussard, Maïté
name: Santos, Karine
name: Hartmann, Oliver
name: Jully, Marion
name: Fratani, Alexandre
name: Oueslati, Haikel
name: Cupaciu, Alexandru
name: Benyamina, Mourad
name: Guillemet, Lucie
name: Deniau, Benjamin
name: Mebazaa, Alexandre
name: Gayat, Etienne
name: Farny, Boris
name: Textoris, Julien
name: Legrand, Matthieu
Publisher: name: figshare
Year: 2020
Subjects: subject: Microbiology
subject: FOS: Biological sciences
subject: Cell Biology
subject: Biotechnology
subject: Immunology
subject: FOS: Clinical medicine
subject: Developmental Biology
subject: Mental Health
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Virology

description: Additional file 2. Supplementary data Table 1. Patients characteristics according to TBSA (Total burn surface area).
Teaching the Environment to Control Quantum Systems
Creators: name: Pechen, Alexander
name: Rabitz, Herschel
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A non-equilibrium, generally time-dependent, environment whose form is deduced by optimal learning control is shown to provide a means for incoherent manipulation of quantum systems. Incoherent control by the environment (ICE) can serve to steer a system from an initial state to a target state, either mixed or in some cases pure, by exploiting dissipative dynamics. Implementing ICE with either incoherent radiation or a gas as the control is explicitly considered, and the environmental control is characterized by its distribution function. Simulated learning control experiments are performed with simple illustrations to find the shape of the optimal non-equilibrium distribution function that best affects the posed dynamical objectives.
Trapped Quintessential Inflation from Flux Compactifications
Creators: name: Dimopoulos, Konstantinos
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Quintessential inflation is studied using a string modulus as the inflaton - quintessence field. It is assumed that the modulus crosses an enhanced symmetry point (ESP) in field space. Particle production at the ESP temporarily traps the modulus resulting in a period of inflation. After reheating, the modulus freezes due to cosmological friction at a large value, such that its scalar potential is dominated by contributions due to fluxes in the extra dimensions. The modulus remains frozen until the present, when it can become quintessence.
description: latex (WS-Proc), 12 pages, 4 figures. Contribution to the Proceedings of the IDM2006 Conference
HEVC Watermarking Techniques for Authentication and Copyright Applications: Challenges and Opportunities
Creators: name: Elrowayati, Ali A.
name: Alrshah, Mohamed A.
name: Abdullah, M. F. L.
name: Latip, Rohaya
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cryptography and Security (cs.CR)
subject: Multimedia (cs.MM)
subject: FOS: Computer and information sciences

description: Recently, High-Efficiency Video Coding (HEVC/H.265) has been chosen to replace previous video coding standards, such as H.263 and H.264. Despite the efficiency of HEVC, it still lacks reliable and practical functionalities to support authentication and copyright applications. In order to provide this support, several watermarking techniques have been proposed by many researchers during the last few years. However, those techniques are still suffering from many issues that need to be considered for future designs. In this paper, a Systematic Literature Review (SLR) is introduced to identify HEVC challenges and potential research directions for interested researchers and developers. The time scope of this SLR covers all research articles published during the last six years starting from January 2014 up to the end of April 2020. Forty-two articles have met the criteria of selection out of 343 articles published in this area during the mentioned time scope. A new classification has been drawn followed by an identification of the challenges of implementing HEVC watermarking techniques based on the analysis and discussion of those chosen articles. Eventually, recommendations for HEVC watermarking techniques have been listed to help researchers to improve the existing techniques or to design new efficient ones.
description: Review article, 20 pages
Exact Black Hole Solutions with a Conformally Coupled Scalar Field and Dynamic Ricci Curvature in $f(R)$ Gravity Theories
Creators: name: Karakasis, Thanasis
name: Papantonopoulos, Eleftherios
name: Tang, Zi-Yu
name: Wang, Bin
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We report exact black hole solutions in asymptotically flat or (A)dS four-dimensional spacetime with a conformally coupled self-interacting scalar field in $f(R)$ gravity. We first consider the asymptotically flat model $f(R) = R -2α\sqrt{R}$ and derive an exact black hole solution. Then, we consider the asymptotically (A)dS model $f(R) =R -2 Λ-2 α\sqrt{R-4 Λ}$ and derive an exact black hole solution. In both cases the modified gravity parameter $α$, which has the dimension of the inverse mass, cannot be set to zero and the self-interacting potential is determined from the Klein-Gordon equation, preserving the conformal invariance. The thermodynamics of the solutions is also studied.
description: Accepted for publication in EPJC
Condenser capacity and hyperbolic perimeter
Creators: name: Nasser, Mohamed M. S.
name: Rainio, Oona
name: Vuorinen, Matti
Publisher: name: arXiv
Year: 2021
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 30C85, 31A15 (Primary) 65E10 (Secondary)

description: We study the conformal capacity by using novel computational algorithms based on implementations of the fast multipole method, and analytic techniques. Especially, we apply domain functionals to study the capacities of condensers $(G,E)$ where $G$ is a simply connected domain in the complex plane and $E$ is a compact subset of $G$. Due to conformal invariance, our main tools are the hyperbolic geometry and functionals such as the hyperbolic perimeter of $E$. Our computational experiments demonstrate, for instance, sharpness of established inequalities. In the case of model problems with known analytic solutions, very high precision of computation is observed.
description: 35 pages, 19 figures
Energy and Spectral Efficiency Balancing Algorithm for Energy Saving in LTE Downlinks
Creators: name: Maharazu, Mamman
name: Hanapi, Zurina Mohd
name: Alrshah, Mohamed A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: In wireless network communication environments, Spectral Efficiency (SE) and Energy Efficiency (EE) are among the major indicators used for evaluating network performance. However, given the high demand for data rate services and the exponential growth of energy consumption, SE and EE continue to elicit increasing attention in academia and industries. Consequently, a study of the trade-off between these metrics is imperative. In contrast with existing works, this study proposes an efficient SE and EE trade-off algorithm for saving energy in downlink Long Term Evolution (LTE) networks to concurrently optimize SE and EE while considering battery life at the Base Station (BS). The scheme is formulated as a Multi-objective Optimization Problem (MOP) and its Pareto optimal solution is examined. In contrast with other algorithms that prolong battery life by considering the idle state of a BS, thereby increasing average delay and energy consumption, the proposed algorithm prolongs battery life by adjusting the initial and final states of a BS to minimize the average delay and the energy consumption. Similarly, the use of an omni-directional antenna to spread radio signals to the user equipment in all directions causes high interference and low spatial reuse. We propose using a directional antenna instead of an omni-directional antenna by transmitting signals in one direction which results in no or low interference and high spatial reuse. The proposed scheme has been extensively evaluated through simulation, where simulation results prove that the proposed scheme is efficiently able to decrease the average response delay, improve SE, and minimize energy consumption.
description: 19 pages
Call control signalling for personal communications over interconnected metropolitan area networks
Creators: name: Qian, Nanjian
Publisher: name: University of British Columbia
Year: 2008

description: Personal communication services (PCS) are currently being developed to enable people to call other people regardless of their locations and movements. A distributed personal communication network (PCN) based on the IEEE 802.6 metropolitan area networks (MANs) has been recently proposed as a means of supporting PCS. This network must be supported by efficient and reliable signalling, which has not been extensively examined and will be the main subject of this thesis. While pre-arbitrated (PA) slots are suitable for the transport of isochronous traffic in IEEE 802.6 MANs, high priority, queue-arbitrated (QA) slots accessed by means of the distributed queue dual bus(DQDB) protocol are appropriate for the transport of signalling messages between the major network elements. The use of bandwidth balancing and erasure nodes to improve the performance of the DQDB protocol has been considered. As analytical models are not available, simulation models have been implemented to facilitate the evaluation of signalling performance in terms of signalling delays and signalling traffic levels. Using these simulation models, the relationship between PA traffic capacity and QA signalling delay has been established, and the effects of alternative signalling architectures with different bus configurations and locations of signalling network elements have been investigated. The best signalling performance is obtained in a closed bus configuration where the head of bus (HOB) stations for the two buses are physically collocated and incorporate the functions of the bandwidth manager, while the function of the signalling termination is distributed among all the MAN nodes. Signalling performance can be improved by employing erasure nodes to recover QA slots already read by their destinations. Theoptimal location for a single erasure node on each bus has been empirically determined by simulations. Logical procedures for call setup, clearing and handoff have been established for calls between mobile subscribers, through the access MANs and backbone MANs. The overlapping call setup procedure, which facilitates parallelism in call setup processing, has been proposed as a possible means of reducing call setup delays. In summary, call control signalling architecture, performance and procedures have been studied in this thesis. The results further the viability of using the IEEE 802.6 MAN to support PCS.
Wave packet dynamics in triplet states of Na2 attached to helium nanodroplets
Creators: name: Claas, Patrick
name: Droppelmann, Georg
name: Schulz, Claus-Peter
name: Mudrich, Marcel
name: Stienkemeier, Frank
Publisher: name: arXiv
Year: 2007
Subjects: subject: Atomic and Molecular Clusters (physics.atm-clus)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: The dynamics of vibrational wave packets excited in Na2 dimers in the triplet ground and excited states is investigated by means of helium nanodroplet isolation (HENDI) combined with femtosecond pump-probe spectroscopy. Different pathways in the employed resonant multi-photon ionization scheme are identified. Within the precision of the method, the wave packet dynamics appears to be unperturbed by the helium droplet environment.
Additional file 1 of Integrative analysis of expression profile indicates the ECM receptor and LTP dysfunction in the glioma-related epilepsy
Creators: name: Wang, Zhi-Bin
name: Qu, Jian
name: Xie, Pan
name: Yang, Zhi-Quan
name: Mao, Chen-Xue
name: Zhang, Ying
name: He, Zheng-Wen
name: Yang, Zhuan-Yi
name: Mao, Xiao-Yuan
name: Liu, Zhao-Qian
Publisher: name: figshare
Year: 2022
Subjects: subject: Biochemistry
subject: Medicine
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Physiology
subject: Biological Sciences not elsewhere classified
subject: Marine Biology
subject: Cancer

description: Additional file 1: Table S1. Clinical data of glioma patients with or without epilepsy for validation.