cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Co-Simulation Framework to Verify Large-Scale Mixed-Signal Designs.
Creators: name: Subhaschandra, Suhas
Publisher: name: Maryland Shared Open Access Repository
Year: 2010
Subjects: interactive testbench
large-scale circuit simulation
sequential execution in SPICE simulator
simulation of floating-gate transistors
trackers and checkers

description: Analog floating-gate transistors enable complex analog processing to be implemented in VLSI circuits, but simulating these elements in a SPICE simulator is challenging. The difficulty is setting the initial voltage on the floating-gate to start the simulation, a lack of simple methodology to change the inputs to the transistor in response to the changing charge on the floating-gate, and transistor models that do not include the injection and tunneling phenomenon that change the stored parameter on a floating-gate transistor. Another challenge is embedding complex, sequentially-triggered events required to simulate programming of a floating-gate transistor. A co-simulation framework is used to combine a circuit simulator with a system simulator which can model serially executing instructions to verify the functionality of a large-scale mixed-signal design with floating-gate elements. The framework offers a simple methodology to simulate the programming of a single floating-gate transistor using available models for injection and tunneling. An array of floating-gate elements that is a part of analog memory is verified using the co-simulation framework. A simple methodology is presented to create unique test benches for verifying designs that have a large number of inputs and outputs. The test bench is used in an interactive method, where the the inputs to the design can be changed during the simulation. The large-scale design is verified quickly by logging the simulation state of design elements, monitoring the results in the test bench and selectively plotting the results.
Chromomagnetic stability of the three flavor Larkin-Ovchinnikov-Fulde-Ferrell phase of QCD
Creators: name: Ciminale, M.
name: Nardulli, G.
name: Ruggieri, M.
name: Gatto, R.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We compute in the Ginzburg-Landau approximation the gluon Meissner masses for the Larkin-Ovchinnikov-Fulde-Ferrell (LOFF) phase of QCD with three flavors in the kinematical range where it is energetically favored. We find real Meissner masses and therefore chromomagnetic stability.
description: 13 pages, 2 figures
Discovery of O stars in the tidal Magellanic Bridge: Stellar parameters, abundances, and feedback of the nearest metal-poor massive stars and their implication for the Magellanic System ecology
Creators: name: Ramachandran, Varsha
name: Oskinova, L. M.
name: Hamann, W. -R.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The Magellanic Bridge stretching between the SMC and LMC is the nearest tidally stripped intergalactic environment and has a low average metallicity of $Z~0.1Z_{\odot}$. Here we report the first discovery of three O-type stars in the Bridge using archival spectra collected with FLAMES at ESO/VLT. We analyze the spectra using the PoWR models, which provide the physical parameters, ionizing photon fluxes, and surface abundances. This discovery suggests that the tidally stripped low density gas is capable of producing massive O stars and their ages imply ongoing star formation in the Bridge. The multi-epoch spectra indicate that all three O stars are binaries. Despite their spatial proximity to each other, these O stars are chemically distinct. One of them is a fast-rotating giant with nearly LMC-like abundances. The other two are main-sequence stars that rotate extremely slowly and are strongly metal depleted. This includes the most nitrogen-poor O star known up to date. Taking into account the previous analyses of B stars in the Bridge, we interpret the various metal abundances as the signature of a chemically inhomogeneous interstellar medium, suggesting that the gas might have accreted during multiple episodes of tidal interaction between the Clouds. Attributing the lowest derived metal content to the primordial gas, the time of initial formation of the Bridge may date back to several Gyr. Using the Gaia and Galex color-magnitude diagrams we roughly estimate the total number of O stars in the Bridge and their total ionizing radiation. Comparing with the energetics of the diffuse ISM, we find that the contribution of the hot stars to the ionizing radiation field in the Bridge is less than 10%, and conclude that the main sources of ionizing photons are leaks from the LMC and SMC. We estimate a lower limit for the fraction of ionizing radiation that escapes from these two dwarf galaxies.
description: to be published in A&A
Coronary Heart Disease Prediction:A Data Mining Approach
Creators: name: DAS, SOMA
Publisher: name: Maryland Shared Open Access Repository
Year: 2012

description: Data mining is a field of computer science that combines statistical analysis and machine learning to detect hard-to-discern patterns from large amounts of data. It employs different algorithms to learn different patterns from training or experience and apply it to classify, predict or identify patterns. The healthcare environment is very information rich. There is a wealth of clinical data available within the healthcare systems. Also due to recent advancement of genomic research vast amount of genetic data are also available. Effective analysis tools are needed to discover hidden relationships and trends in these data. These tools are necessary to correctly diagnose people at risk of disease based on the derived knowledge from the data.  We used data mining techniques to evaluate the interaction between traditional risk factors and gene variants such as Single Nucleotide Polymorphisms (SNPs) towards Coronary Heart Disease (CHD) susceptibility in a prospective study of older population aged 65 and older. In our thesis we asked two questions whether we can predict CHD at birth or adding genetic information to traditional risk factors predict CHD better than traditional risk factors alone.We analyzed two popular machine learning algorithms to determine the most efficient method on given domain. We also applied a clustering method to identify different subgroups present in the selected datasets and determine the effect of genetic data on clustering.  This study demonstrates the concept of using multiple SNPs as independent risk factors and indicates that it can improve prediction of incident CHD.
An ethnography of secondary school student composition in music : a study of personal involvement within the compositional process
Creators: name: Tsisserev, Alex
Publisher: name: University of British Columbia
Year: 2009

description: This study deals primarily with the way secondaryschool students use music to express their personal, inner feelings through composition. Because the topic of personal expression through music composition is an elusive one, my methodology borrows and combines analytical tools from the fields of phenomenology, hermeneutics, semiotics, ethnography and English language arts, and incorporates these tools in the exploration of student's processes, of self-expression through music composition. For a period of several weeks I worked with a sixteen-student sample group,in a Vancouver high school. Each of the students handed in a musical composition. Four of the students granted me interviews in which they shared their views of their compositional processes and the resulting musical works. By the conclusion of the study, the students had displayed the ability to communicate certain ideas, images and emotions, and express themselves by articulating their own unique sense of being through their musical compositions. Furthermore, the students demonstrated a level of musical awareness which has very little to do with the type of proficiency-based music learning that is prevalent in many of today's music education classrooms. Most importantly, however, this study spawns a methodology which examines students' compositional processes rather than their finished musical products.
The proton inelastic cross section at ultrahigh energies
Creators: name: Bhattacharya, Atri
name: Cudell, Jean-René
name: Oueslati, Rami
name: Vanthieghem, Arno
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the consequences of high-energy collider data on the best fits to total, elastic, and inelastic cross sections for $pp$ and $p\bar{p}$ scattering using two very distinct unitarisation schemes: the eikonal and the $U$-matrix. Despite their analytic differences, we find that the two schemes lead to almost identical predictions up to EeV energies, with differences only becoming significant at GUT-scale and higher energies.
description: 7 pages, 4 figures
title: Türen zu Möglichkeitsräumen eröffnen: Ist die Vermittlung digitaler Praktiken im Sinne gesellschaftlicher Teilhabe auch ein pflegerischer Auftrag?
Creators: name: Kroll, Thomas Franz
Publisher: name: Katholische Hochschule Nordrhein-Westfalen, Köln
Year: 2024
Subjects: subject: 600 Technik, Medizin, angewandte Wissenschaften

description: Die Teilhabe an der Gesellschaft findet in Möglichkeitsräumen statt, in denen Menschen selbstbestimmt ihre Rollenarrangements einnehmen. Durch die digitale Transformation sind digitale Möglichkeitsräume entstanden, die die Lebenswelt der Menschen abbilden und mit Instrumenten, wie Smartphones erschlossen werden können. In dem universellen Anspruch, dass alle Menschen an der Gesellschaft teilhaben sollen, erwachsen Implikationen jene zu fördern, die über keinen Zugang zu digitalen Möglichkeitsräumen, oder über mangelnde Fertigkeiten für das Agieren in ihnen verfügen. Die Förderung von Teilhabe als pflegerischer Auftrag kann vielfältig argumentiert werden. Durch das Entstehen digitaler Möglichkeitsräume müsste der pflegerische Auftrag Strahlkraft auf digitale Technologien, wie dem Smartphone, zur Förderung gesellschaftlicher Teilhabe haben. Da bisher die Rolle der Pflegenden in Bezug auf die Vermittlung digitaler Praktiken an Smartphones, bestehende Problematiken sowie die Wahrnehmung des pflegerischen Auftrages der Pflegenden selbst, unklar sind, versucht die Arbeit diesen Fragen nachzugehen. Im Rahmen des Forschungsprojektes CrossComITS wurden zehn Leitfadeninterviews mit Pflegenden aus verschiedenen Versorgungskontexten durchgeführt. Zur Beantwortung der Forschungsfragen dieser Arbeit wurden die vorliegenden Daten mittels inhaltlich strukturierter qualitativer Inhaltsanalyse ausgewertet. Es konnte gezeigt werden, dass Pflegende Aktivitäten an Smartphones vermitteln, sich Anlässe von Vermittlungen jedoch lediglich aus Problemen von Pflegerezipient_innen ergeben, in denen Pflegende kurzfristig Hilfestellung leisten. Eine konkrete Einbindung in den Pflegeprozess findet nicht statt. Dabei tauchen Problematiken auf, die sich zumeist aus organisatorischen Rahmenbedingungen ergeben. Es existieren unter den Pflegenden heterogene Sichtweisen des Vermittelns digitaler Praktiken an Smartphones. Werden Tätigkeiten des Vermittelns als pflegerischer Auftrag abstrahiert, dann über übergeordnete Konzepte. Schließlich wird durch die Sichtweisen der derzeitige pflegerische Diskurs um die Teilhabeförderung mit Smartphones sichtbar, der lediglich in Ansätzen stattfindet. Auch wenn die Förderung der Teilhabe von Pflegerezipient_innen mittels Smartphones ein herausforderndes Unterfangen ist, bei dem Pflegende an Grenzen stoßen, kann es ihnen im Zusammenspiel mit anderen Akteur_innen gelingen, Pflegerezipient_innen zu unterstützen und deren Teilhabe durch Smartphones zu fördern.
Bipartite quantum systems: on the realignment criterion and beyond
Creators: name: Lupo, Cosmo
name: Aniello, Paolo
name: Scardicchio, Antonello
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Inspired by the `computable cross norm' or `realignment' criterion, we propose a new point of view about the characterization of the states of bipartite quantum systems. We consider a Schmidt decomposition of a bipartite density operator. The corresponding Schmidt coefficients, or the associated symmetric polynomials, are regarded as quantities that can be used to characterize bipartite quantum states. In particular, starting from the realignment criterion, a family of necessary conditions for the separability of bipartite quantum states is derived. We conjecture that these conditions, which are weaker than the parent criterion, can be strengthened in such a way to obtain a new family of criteria that are independent of the original one. This conjecture is supported by numerical examples for the low dimensional cases. These ideas can be applied to the study of quantum channels, leading to a relation between the rate of contraction of a map and its ability to preserve entanglement.
description: 19 pages, 4 figures, improved version
The work, lifestyles and domination of chinese migrant garment workers, in comparative perspective
Creators: name: Siu, Yukwan
Publisher: name: The Australian National University
Year: 2014
Subjects: subject: Migrant labor Social conditionsChina
subject: Migrant labor Economic conditionsChina
subject: Clothing workers.
subject: Clothing factories China
subject: Clothing factories Hong Kong
subject: Clothing factories Vietnam (Republic)

description: This dissertation, The Work, Lifestyles and Domination of Chinese Migrant Garment Workers, reveals three major changes in the circumstances of the migrant working class in south China over the past two decades, from historical and comparative perspectives -- the rise of a male migrant working population in the export industry sector, a notable shift in the material and social lives of migrant industrial workers, and the emergence of a new factory regime in the export industries that relies increasingly on non-coercive modes of domination over the factory workforce. By carrying out on-site fieldwork regarding Hong Kong-invested garment factories in south China, Hong Kong and southern Vietnam, as well as factory-gate surveys of workers in China and Vietnam, the study examines how and why the circumstances of the workers in these different localities are dissimilar even when under the same type of factory ownership. In analysing workers' lives within and outside factories, as well as tracing the expansion of global capitalism in East and Southeast Asia, the dissertation not only seeks to contribute to research on the politics of production and everyday life practice, but also to an understanding of how global and local forces interact.
Why the Michelson-Morley Experiments Give Null Result
Creators: name: Wokene, Henok Tadesse
Publisher: name: Zenodo
Year: 2024
Subjects: Michelson-Morley experiment
special Relativity theory

description: Many researchers and physicists, including renowned scientists, have long questioned the foundations of relativity theory, which are the two postulates: the principle of relativity and the constancy of the speed of light, and their consequences. However, what exactly is wrong with relativity theory has eluded researchers for more than a century. This paper reveals the mystery of why the Michelson-Morley experiments always give null fringe shifts, contrary to other experimental evidences of absolute motion, such as the Silvertooth experiment and the Marinov experiment. A new theory/model of the speed of light is formulated as follows. The effect of absolute motion of the Michelson-Morley device is just to cause an apparent change in the time of emission of light from the source. Thus, both the longitudinal and transverse light beams are delayed or advanced equally, by the same amount, in which case no fringe shift will occur. The center of the light wave fronts is always the same point relative to the observer/detector between the moments of light emission and light detection. The center of the light wave fronts is fixed at the point where the source was relative to the detector at the moment of emission and is always fixed in the reference frame of the detector  (relative to the detector) and is therefore always co-moving with the observer/detector. The speed of light is constant c relative to the center of the light wave fronts, and therefore it is always constant relative to the observer. The mystery behind the Michelson-Morley experiment is that it is impossible to detect absolute motion from the interference pattern formed by light beams originating from a single source! Therefore, the key to detect absolute motion by using the Michelson-Morley kind experiments would be by interference of light beams from two independent sources. Such hypothetical experiment would give thousands of fringe shifts. However, such experiment is not possible with current technology, because the coherence time/length of light is very short, and because it is nearly impossible to tune the frequencies of two independent laser sources to be equal to within, say, 0.1 to 1 Hz  to get any fringe patterns stable enough to see if a fringe shift occurs with change in orientation of the modified MM device in space.
МОДЕЛИРОВАНИЕ И УПРАВЛЕНИЕ БАРАБАННОЙ СУШИЛКОЙ СЫПУЧИХ МАТЕРИАЛОВ С ИСПОЛЬЗОВАНИЕМ MATLAB
Creators: name: Нариманова, Ирода
name: Кабулов, Анвар
Publisher: name: Zenodo
Year: 2024

description: В данной работе рассматривается моделирование и управление барабанной сушилкой сыпучих материалов с использованием программного пакета MATLAB. Важность данного исследования обусловлена необходимостью повышения эффективности сушки и снижения энергозатрат в различных отраслях промышленности. В работе разработана математическая модель сушилки, основанная на физических и термодинамических процессах. Система управления, включающая ПИД-регуляторы, была реализована для оптимизации условий сушки и улучшения контроля над параметрами процесса. MATLAB использовался для численного моделирования и разработки алгоритмов управления. Результаты показывают, что применение предложенной модели и системы управления способствует повышению энергоэффективности и качества сушки.
Detecting and monitoring long-term landslides in urbanized areas with nighttime light data and multi-seasonal Landsat imagery across Taiwan from 1998 to 2017
Creators: name: Chen, Tzu-Hsin Karen
name: Prishchepov, Alexander V.
name: Fensholt, Rasmus
name: Sabel, Clive E.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Image and Video Processing (eess.IV)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Monitoring long-term landslide activity is important for risk assessment and land management. Despite the widespread use of open-access 30m Landsat imagery, their utility for landslide detection is often limited when separating landslides from other anthropogenic disturbances. Here, we produce landslide maps retrospectively from 1998 to 2017 for landslide-prone and highly populated Taiwan (35,874 km2). To improve classification accuracy of landslides, we integrate nighttime light imagery from the Defense Meteorological Satellite Program (DMSP) and the Visible Infrared Imaging Radiometer Suite (VIIRS), with multi-seasonal daytime optical Landsat time-series, and digital elevation data from the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER). We employed a non-parametric machine-learning classifier, random forest, to classify the satellite imagery. The classifier was trained with data from three years (2005, 2010, and 2015), and was validated with an independent reference sample from twelve years. Our results demonstrated that combining nighttime light data and multi-seasonal imagery significantly improved the classification (p<0.001), compared to conventional methods based on single-season optical imagery. The results confirmed that the developed classification model enabled mapping of landslides across Taiwan over a long period with annual overall accuracy varying between 96% and 97%, user's and producer's accuracies between 73% and 86%. Spatiotemporal analysis of the landslide inventories from 1998 to 2017 revealed different temporal patterns of landslide activities, showing those areas where landslides were persistent and other areas where landslides tended to reoccur after vegetation regrowth. In sum, we provide a robust method to detect long-term landslide activities based on freely available satellite imagery, which can be applied elsewhere.
title: e-Forschungsberichte, Faszikel 2 (2021)
title: Research E-Papers, Faszikel 2 (2021)
title: Faszikel 2 (2021)
titleType: AlternativeTitle
Creators: name: Deutsches Archäologisches Institut
Publisher: name: Deutsches Archäologisches Institut
Year: 2021

description: Vau i Dejës, Albanien. Das hellenistische Heiligtum. Die Arbeiten des Jahres 2021...§ 1–16 Berlin, Deutschland/Olympia, Griechenland. Digital Roofs. Die Arbeiten der Jahre 2020 und 2021...§ 1–8 Athen, Griechenland. »Shapes of Ancient Greece«: Ein Projekt zur Digitalisierung der archäologischen Sammlung der Abteilung Athen. Der ­Beginn der Arbeiten 2021...§ 1–8 Rome, Italy. The Palatine Hill in Rome and its history of research in the 19th century. A report on the latest ›excavations‹ in the archives of Rome. Season 2021...§ 1–9 Gadara, Jordanien. 749 AD. Ein Erdbebenhorizont am höchsten Punkt des Siedlungsareals. Auszug aus den Arbeiten der Jahre 2015, 2018 und 2019...§ 1–16 Baalbek, Libanon. Feldforschungen und Konservierungsarbeiten. Die Arbeiten des Jahres 2020...§ 1–27 Prilep, North Macedonia. House taskscapes in the Early Neolithic of the Pelagonia Valley: micro-refuse analyses. First results of the Campaign 2019...§ 1–15 Maikop, Russische Föderation. Neues zur Domestikation des Pferdes. Die Anfänge führen in den Kaukasus während des 4. Jahrtausends v. Chr. Aktuelle Resultate 2021...§ 1–16 Nu’usi und Nggela, Salomonen. Neue archäologische Forschungen auf den Salomonen Inseln. Die Ergebnisse der Feldkampagnen 2020 und 2021...§ 1–13 Emporion (Empúries – L´Escala), Spanien. Der Architekturdekor von Emporion. Untersuchungen zum Baudekor der griechischen und römischen Stadt. Die Arbeiten der Jahre 2019 bis 2021...§ 1–17 Córdoba, Spanien. Madīnat al-Zahrā'. Die Arbeiten der Jahre 2020 und 2021...§ 1–19 Pergamon, Türkei. Die Altgrabungen auf dem Musalla Mezarlığı in Pergamon. Die Arbeiten des Jahres 2021...§ 1–23 Pergamon, Türkei. Neue Forschungen zum Pitanedossier aus Pergamon. Ein Arbeitsbericht der Jahre 2018 bis 2021...§ 1–14
Self-assembly of the simple cubic lattice with an isotropic potential
Creators: name: Rechtsman, Mikael C.
name: Stillinger, Frank H.
name: Torquato, Salvatore
Publisher: name: arXiv
Year: 2006
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Conventional wisdom presumes that low-coordinated crystal ground states require directional interactions. Using our recently introduced optimization procedure to achieve self-assembly of targeted structures (Phys. Rev. Lett. 95, 228301 (2005), Phys. Rev. E 73, 011406 (2006)), we present an isotropic pair potential $V(r)$ for a three-dimensional many-particle system whose classical ground state is the low-coordinated simple cubic (SC) lattice. This result is part of an ongoing pursuit by the authors to develop analytical and computational tools to solve statistical-mechanical inverse problems for the purpose of achieving targeted self-assembly. The purpose of these methods is to design interparticle interactions that cause self-assembly of technologically important target structures for applications in photonics, catalysis, separation, sensors and electronics. We also show that standard approximate integral-equation theories of the liquid state that utilize pair correlation function information cannot be used in the reverse mode to predict the correct simple cubic potential. We report in passing optimized isotropic potentials that yield the body-centered cubic and simple hexagonal lattices, which provide other examples of non-close-packed structures that can be assembled using isotropic pair interactions.
description: 16 pages, 12 figures. Accepted for publication in Physical Review E
Source Counts Spanning Eight Decades of Flux Density at 1.4 GHz
Creators: name: Matthews, A. M.
name: Condon, J. J.
name: Cotton, W. D.
name: Mauch, T.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Brightness-weighted differential source counts $S^2 n(S)$ spanning the eight decades of flux density between $0.25\,μ\mathrm{Jy}$ and 25 Jy at 1.4 GHz were measured from (1) the confusion brightness distribution in the MeerKAT DEEP2 image below $10\,μ\mathrm{Jy}$, (2) counts of DEEP2 sources between $10\,μ\mathrm{Jy}$ and $2.5\,\mathrm{mJy}$, and (3) counts of NVSS sources stronger than $2.5\,\mathrm{mJy}$. We present our DEEP2 catalog of $1.7 \times 10^4$ discrete sources complete above $S = 10\,μ\mathrm{Jy}$ over $Ω= 1.04\,\mathrm{deg}^2$. The brightness-weighted counts converge as $S^2 n(S) \propto S^{1/2}$ below $S = 10\,μ\mathrm{Jy}$, so $>99\%$ of the $ΔT_\mathrm{b} \sim 0.06\,\mathrm{K}$ sky brightness produced by active galactic nuclei and $\approx96\%$ of the $ΔT_\mathrm{b} \sim 0.04\,\mathrm{K}$ added by star-forming galaxies has been resolved into sources with $S \geq 0.25\,μ\mathrm{Jy}$. The $ΔT_\mathrm{b} \approx 0.4\,\mathrm{K}$ excess brightness measured by ARCADE 2 cannot be produced by faint sources smaller than $\approx 50\,\mathrm{kpc}$ if they cluster like galaxies.
description: 19 pages, 13 figures, accepted for publication in ApJ
The QCD equation of state with asqtad staggered fermions
Creators: name: Bernard, C.
name: Burch, T.
name: DeTar, C.
name: Gottlieb, Steven
name: Levkova, L.
name: Heller, U. M.
name: Hetrick, J. E.
name: Renner, D. B.
name: Toussaint, D.
name: Sugar, R.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We report on our result for the equation of state (EOS) with a Symanzik improved gauge action and the asqtad improved staggered fermion action at $N_t=4$ and 6. In our dynamical simulations with 2+1 flavors we use the inexact R algorithm and here we estimate the finite step-size systematic error on the EOS. Finally we discuss the non-zero chemical potential extension of the EOS and give some preliminary results.
description: 7 pages, 6 figures, presented at Lattice2006(High Temperature and Density), to appear in Proceedings of Science
A qualitative enquiry into practitioners' : reflection on science communication practice in local communities in Japan
Creators: name: Kudo, Mitsuru
Publisher: name: The Australian National University
Year: 2014
Subjects: subject: Communication in science Japan
subject: Social participation

description: This thesis empirically explores the meanings, values and issues of community-based collaborative schemes of science communication - an increasingly prevalent mode of science communication practice in Japan and beyond - from the perspectives of local practitioners and local communities. One of the national programmes of community-based collaborative science communication, namely the Supporting Local Networks, was selected as the case to examine, and in total 40 in-depth interviews were conducted with 43 local practitioners at eight sites across Japan. The interviews were examined following qualitative analytical methods. The empirical study has revealed, on the one hand, that the local practitioners recognised a variety of positive values and meanings of practising science communication in their local communities, and appreciated diverse practical contributions of the community-based collaborative scheme to achieving those positive values and meanings. On the other, however, it has also been shown that the scheme posed a wide range of problems, difficulties and dilemmas to the local practitioners, which pointed to several structural limitations of community-based collaborative schemes with regard to achieving self-sustainable local science communication. Based on these findings, the author calls on science communication research to investigate further the meanings and values of science communication in a more empirical, descriptive and explorative manner. To this end, there should be more attention paid to the voices of local practitioners and community residents regarding how they make sense of science communication in the political, economic, social and cultural contexts of their own community.
title: Θραύσματα αναπαράστασης: Σμιλεύοντας το τοπίο του Λυκαβηττού
title: Fragments of representation: “Sculpting” The landscape of mount Lycabetus
Creators: name: Γατουδη-Μαλινδρετου Μελινα
Publisher: name: Technical University of Crete
Year: 2024

description:  Η παρούσα διπλωματική εργασία εξετάζει την έννοια της αναπαράστασης του σύγχρονου αθηναϊκού τοπίου. Με αφετηρία την έννοια του “κατοικείν”, όπως ορίζεται από τον Martin Heidegger και θεωρώντας ότι το τοπίο αποτελεί καλλιτεχνικό προϊόν αναπαράστασης ενός κατοικημένου τόπου, επιχειρείται να βρεθεί ο τόπος, ο πλήρως φορτισμένος από νοήματα και συμβάντα, που δύναται να αναπαρασταθεί.
 Η αθηναϊκή τοπογραφία είναι ένα σύνολο διαστρωματώσεων, ένα σύστημα εδαφικών εξάρσεων που ταλαντώνεται συνεχώς. Μέσα από αυτό δημιουργούνται οι επτά λόφοι που περιβάλλουν το λεκανοπέδιο. Ο λόφος του Λυκαβηττού είναι ο πρώτος που επισκέπτονται οι περιηγητές του 19ου αιώνα, αλλά και ο τόπος που προσφέρει την πρώτη πανοραμική θέαση της πόλης στους σύγχρονους επισκέπτες της. Είναι ο τόπος που δέχεται το πρώτο φως της ανατολής, τη στιγμή που ο άνθρωπος είναι απόλυτα ανοιχτός σε κάθε ερέθισμα. Εκεί, το σχεδόν απόκοσμο και λαξευμένο περιβάλλον του διατηρητέου θεάτρου του Τάκη Ζενέτου λειτουργεί σαν ένας φυσικός σκηνικός χώρος.
 Με βάση τη θεωρητική ανάλυση που πραγματοποιείται, επιλέγεται ο συγκεκριμένος τόπος του ανενεργού λατομείου, ως τόπος αρχιτεκτονικής και τοπιακής επέμβασης. Με έναυσμα την αποκατάσταση και επανάχρηση του θεάτρου του Λυκαβηττού, χωροθετείται μια θερινή σχολή παραστατικών τεχνών, με στόχο την εκ νέου κατοίκηση του λόφου και την ενίσχυση του καλλιτεχνικού πυρήνα του κέντρου της πόλης.
Excitation Chains at the Glass Transition
Creators: name: Langer, J. S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The excitation-chain theory of the glass transition, proposed in an earlier publication, predicts diverging, super-Arrhenius relaxation times and, {\it via} a similarly diverging length scale, suggests a way of understanding the relations between dynamic and thermodynamic properties of glass-forming liquids. I argue here that critically large excitation chains play a role roughly analogous to that played by critical clusters in the droplet model of vapor condensation. The chains necessarily induce spatial heterogeneities in the equilibrium states of glassy systems; and these heterogeneities may be related to stretched-exponential relaxation. Unlike a first-order condensation point in a vapor, the glass transition is not a conventional phase transformation, and may not be a thermodynamic transition at all.
description: 4 pages, no figures
R script for Revisiting the question of nucleated versus enucleated erythrocytes in birds and mammals.
Creators: name: Yufeng Zhang
name: Yap, Kang Nian
Publisher: name: figshare
Year: 2021
Subjects: subject: 60806 Animal Physiological Ecology
subject: FOS: Biological sciences

description: R script for Revisiting the question of nucleated versus enucleated erythrocytes in birds and mammals.
Scattering, determinants, hyperfunctions in relation to Gamma(1-s)/Gamma(s)
Creators: name: Burnol, Jean-Francois
Publisher: name: arXiv
Year: 2006
Subjects: subject: Number Theory (math.NT)
subject: Classical Analysis and ODEs (math.CA)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics

description: The method of realizing certain self-reciprocal transforms as (absolute) scattering, previously presented in summarized form in the case of the Fourier cosine and sine transforms, is here applied to the self-reciprocal transform f(y)-> H(f)(x) = \int_0^\infty J_0(2\sqrt{xy})f(y) dy, which is isometrically equivalent to the Hankel transform of order zero and is related to the functional equations of the Dedekind zeta functions of imaginary quadratic fields. This also allows to re-prove and to extend theorems of de Branges and V. Rovnyak regarding square integrable functions which are self-or-skew reciprocal under the Hankel transform of order zero. Related integral formulae involving various Bessel functions are all established internally to the method. Fredholm determinants of the kernel J_0(2\sqrt{xy}) restricted to finite intervals (0,a) give the coefficients of first and second order differential equations whose associated scattering is (isometrically) the self-reciprocal transform H, closely related to the function Gamma(1-s)/Gamma(s). Remarkable distributions involved in this analysis are seen to have most natural expressions as (difference of) boundary values (i.e. hyperfunctions.) The present work is completely independent from the previous study by the author on the same transform H, which centered around the Klein-Gordon equation and relativistic causality. In an appendix, we make a simple-minded observation regarding the resolvent of the Dirichlet kernel as a Hilbert space reproducing kernel.
description: 63 pages
Stringy-Running-Vacuum-Model Inflation: from primordial Gravitational Waves and stiff Axion Matter to Dynamical Dark Energy
Creators: name: Mavromatos, Nick E.
name: Sola, Joan
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In previous works we have derived a Running Vacuum Model (RVM) for a string Universe, which provides an effective description of the evolution of 4-dimensional string-inspired cosmologies from inflation till the present epoch. In the context of this "stringy RVM" version, it is assumed that the early Universe is characterised by purely gravitational degrees of freedom, from the massless gravitational string multiplet, including the antisymmetric tensor field. The latter plays an important role, since its dual gives rise to a `stiff' gravitational-axion "matter", which in turn couples to the gravitational anomaly terms, assumed to be non-trivial at early epochs. In the presence of primordial gravitational wave (GW) perturbations, such anomalous couplings lead to an RVM-like dynamical inflation, without external inflatons. We review here this framework and discuss potential scenarios for the generation of such primordial GW, among which the formation of unstable domain walls, which eventually collapse in a non-spherical-symmetric manner, giving rise to GW. We also remark that the same type of "stiff" axionic matter could provide, upon the generation of appropriate potentials during the post-inflationary eras, (part of) the Dark Matter (DM) in the Universe, which could well be ultralight, depending on the parameters of the string-inspired model. All in all, the new (stringy) mechanism for RVM-inflation preserves the basic structure of the original (and more phenomenological) RVM, as well as its main advantages: namely, a mechanism for graceful exit and for generating a huge amount of entropy capable of explaining the horizon problem. It also predicts axionic DM and the existence of mild dynamical Dark Energy (DE) of quintessence type in the present universe, both being "living fossils" of the inflationary stages of the cosmic evolution.
description: 75 pages revtex, 6 pdf figures incorporated
Letter from Colin C. MacRae to the Rainbow Ranche, September 9, 1909
Creators: name: MacRae, Colin C.
Publisher: name: The University of British Columbia
Year: 2017

description: Letter to the Rainbow Ranche from Colin C. MacRae, manager of the Royal Bank of Canada in Vernon, B.C., dated September 9, 1909, regarding a payment to F.A. Hewer.
Spicules and downflows in the solar chromosphere
Creators: name: Bose, Souvik
name: Joshi, Jayant
name: Henriques, Vasco M. J.
name: van der Voort, Luc Rouppe
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: High-speed downflows have been observed in the solar transition region (TR) and lower corona for many decades. Despite their abundance, it has been hard to find signatures of such downflows in the solar chromosphere. In this work, we target an enhanced network region that shows ample occurrences of rapid spicular downflows in the \halpha\ spectral line that could potentially be linked to high-speed TR downflowing counterparts. We used the $k$-means algorithm to classify the spectral profiles of on-disk spicules in \halpha{} and \cak{} data observed from the Swedish 1-m Solar Telescope (SST) and employed an automated detection method based on advanced morphological image processing operations to detect such downflowing features, in conjunction with rapid blue-shifted and red-shifted excursions (RBEs and RREs). We report the existence of a new category of RREs (termed as downflowing RRE) for the first time that, contrary to earlier interpretation, are associated with chromospheric field-aligned downflows moving towards the strong magnetic field regions. Statistical analysis performed on nearly 20,000 RBEs and 15,000 RREs (including the downflowing counterparts), detected in our 97~min long dataset, shows that the downflowing RREs are very similar to RBEs and RREs except for their oppositely directed plane-of-sky motion. Furthermore, we also find that RBEs, RREs and downflowing RREs can be represented by a wide range of spectral profiles with varying Doppler offsets, and \halpha{} line core widths, both along and perpendicular to the spicule axis, that causes them to be associated with multiple substructures that evolve together. We speculate that these rapid plasma downflows could well be the chromospheric counterparts of the commonly observed TR downflows.
description: 24 pages, 16 figures. Accepted for publication in Astronomy & Astrophysics. Some of the figures have been compressed to comply with arXiv requirements
Demonstrate the application of the concept of Spread Identity to enhance security on internet against DDOS attacks
Creators: name: Dawalbhakta, Amol Avinash
Publisher: name: Maryland Shared Open Access Repository
Year: 2008
Subjects: Computer Science (0984)
Spread Identity
DDOS
IP Address
Internet
dynamic
NS2

description: The importance of security over the internet is increasing by the day. Security is important not only for the individual user but also for the many businesses, servers that are operative of the internet. These are particularly susceptible to types of attacks called Distributed Denial of Service (DDoS) Attacks. Spread-Identity is a new concept that can be used to improve Internet security. In this approach, we dynamically spread (and shrink) the identity of a resource and dynamically bind the identities to the resources. The identity of a host on internet is its IP address. So in this approach we dynamically assign different IP addresses to a host. We have simulated the spread identity mechanism to demonstrate the application of this paradigm to the internet. We further demonstrate how this paradigm can be effectively used to mitigate the threat of the DDoS Attacks. To prove the feasibility of the Spread Identity approach, we first demonstrate its scalability by testing the response time/throughput of the servers with increasing number of clients and prove that the performance is not affected significantly. Then to prove the effectiveness of this approach to mitigate DDOS attacks, we will show that intrusion detection is possible: i.e., the attacking users can be identified - this is the first step before the preventive action can be taken (maybe by redirecting traffic, we have used the approach of dropping packets from affected domain for simulation purposes). Also to demonstrate the efficacy of the approach to keep the servers operative in the face of the attacks, we have monitored the bandwidth of the bottleneck link, when under attack and proven how DDOS attacks can be mitigated with our approach.
Exploring the Approximability Landscape of 3SUM
Creators: name: Bringmann, Karl
name: Ghazy, Ahmed
name: Künnemann, Marvin
Publisher: name: CISPA
Year: 2024

description: Since an increasing number of problems in P have conditional lower bounds against exact algorithms, it is natural to study which of these problems can be efficiently approximated. Often, however, there are many potential ways to formulate an approximate version of a problem. We ask: How sensitive is the (in-)approximability of a problem in P to its precise formulation? To this end, we perform a case study using the popular 3SUM problem. Its many equivalent formulations give rise to a wide range of potential approximate relaxations. Specifically, to obtain an approximate relaxation in our framework, one can choose among the options: (a) 3SUM or Convolution 3SUM, (b) monochromatic or trichromatic, (c) allowing under-approximation, over-approximation, or both, (d) approximate decision or approximate optimization, (e) single output or multiple outputs and (f) implicit or explicit target (given as input). We show general reduction principles between some variants and find that we can classify the remaining problems (over polynomially bounded positive integers) into three regimes: 1) (1+ε)-approximable in near-linear time Õ(n + 1/ε), 2) (1+ε)-approximable in near-quadratic time Õ(n/ε) or Õ(n+1/ε²), or 3) non-approximable, i.e., requiring time n^{2± o(1)} even for any approximation factor. In each of these three regimes, we provide matching upper and conditional lower bounds. To prove our results, we establish two results that may be of independent interest: Over polynomially bounded integers, we show subquadratic equivalence of (min,+)-convolution and polyhedral 3SUM, and we prove equivalence of the Strong 3SUM conjecture and the Strong Convolution 3SUM conjecture.
Data Gathering in Wireless Sensor Networks using Multiple Mobile Data Collection Agents
Creators: name: Shah, Piyush Pradipkumar
Publisher: name: Maryland Shared Open Access Repository
Year: 2008
Subjects: Wireless Sensor Networks
Multiple Mobile Agents
Ultra Wide Band
Hierarchical Network
Computer Science (0984)

description: Mobile agent based data gathering in Distributed Sensor Networks (DSN) has been a topic of significant research in recent years.  In this work, we consider a network architecture for DSN that makes use of hybrid nodes with Radio Frequency (RF) and Ultra Wide Band (UWB) communication.  It uses a hierarchical network based approach with reduced connectivity constraint between cluster heads.  Each cluster of lite sensor nodes  and the corresponding cluster head, also termed as Sophisticated Node (SN) work as an independent unit. Mobile Data Collection Agents (MDCA) such as Unmanned Aerial Vehicles (UAV) or mobile robots are used to gather the data from the sophisticated node. Intra-cluster data gathering is done using traditional RF communication. SNs are also equipped with UWB transmitters to transfer data with high rate to MDCAs. Further, we also developed a multiple mobile agent based data gathering algorithm (MMDG) that takes into account the priority of data and life time of the SNs. It  provides intelligence to a MDCA on tour to effectively use waiting time in case of a priority request from the node. Simulation based analysis is used to show the effectiveness of algorithm in terms of time of tour, network coverage, life-time of the SNs and data collected in the tour. Simulation results show that priority based data collection is very effective and that dynamic tour of MDCA can effectively use the waiting time in the schedule to gather about 20 percent of additional data from higher priority SNs.
Data Clustering with a Relational Push-Pull Model
Creators: name: Anthony, Adam Paul
Publisher: name: Maryland Shared Open Access Repository
Year: 2007
Subjects: Computer Science (0984)
relational clustering
generative model
statistical relational learning

description: Relational data clustering is the task of grouping data objects together when both features and relations between objects are present.  I present a new generative model for relational data in which relations between objects can have either a binding or separating effect. For example, with a group of students separated into gender clusters, a ``dating'' relation would appear most frequently between the clusters, but a ``roommate'' relation would appear more often within clusters.  In visualizing these relations, one can imagine that the ``dating'' relation effectively  pushes clusters apart, while the ``roommate'' relation pulls clusters into tighter formations. I use simulated annealing to search for optimal values of the unknown model parameters, where the objective function is a Bayesian score derived from the generative model.   Specifically, I show that an assumption that relations should most frequently appear within clusters can lead to poor performance, using experiments with artificial data and two real-world data sets: a Hollywood actor database and an ecological food web.  The experiments show that push-type relations do exist, and therefore the tendency of relations to pull clusters together cannot be assumed in general.
Electromagnetic and spin polarisabilities in lattice QCD
Creators: name: Detmold, W.
name: Tiburzi, B. C.
name: Walker-Loud, A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We discuss the extraction of the electromagnetic and spin polarisabilities of nucleons from lattice QCD. We show that the external field method can be used to measure all the electromagnetic and spin polarisabilities including those of charged particles. We then turn to the extrapolations required to connect such calculations to experiment in the context of chiral perturbation theory, finding a strong dependence on the lattice volume and quark masses.
description: 7 pages, talk presented at 24th International Symposium on Lattice Field Theory, 23-28 July 2006. To appear in Proceedings of Science
Microwave Quantum Illumination via Cavity Magnonics
Creators: name: Cai, Qizhi
name: Liao, Jinkun
name: Shen, Bohai
name: Guo, Guangcan
name: Zhou, Qiang
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantum illumination (QI) is a quantum sensing protocol mainly for target detection which uses entangled signal-idler photon pairs to enhance the detection efficiency of low-reflectivity objects immersed in thermal noisy environments. Especially, due to the naturally occurring background radiation, the photon emitted toward potential targets more appropriately lies in the microwave region. Here, we propose a hybrid quantum source based on cavity magnonics for microwave QI, where the medium that bridges the optical and the microwave modes is magnon, the quanta of spin wave. Within experimentally accessible parameters, significant microwave-optical quantum resources of interest can be generated, leading to orders of magnitude lower detecting error probability compared with the electro-optomechanical prototype quantum radar and any classical microwave radar with equal transmitted energy.
description: 15 pages, 5 figures