cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Ethernet-basierte Ultra-Hochgeschwindigkeitskommunikation für eine Regelung dezentraler Einspeiseumrichter von Windenergieanlagen
Creators: name: Flatt, Holger
name: Schriegel, Sebastian
name: Westerkamp, Jan F.
name: Mackensen, Ingo
name: Gensior, Albrecht
name: Jasperneite, Jürgen
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2021
Subjects: subject: Ethernet-Ultra-Hochgeschwindigkeitskommunikation
subject: FPGA-basierter Systemaufbau
subject: 621.3

description: In diesem Beitrag wird eine Ethernet-Ultra-Hochgeschwindigkeitskommunikation vorgestellt, welche auf der Nutzung von GBit-Ethernet-PHYs in Verbindung mit einer FPGA-Protokollverarbeitung basiert. Hierzu wurde ein mit IEEE 802-Standards kompatibles Protokoll entwickelt, welches es dem Empfänger ermöglicht, Daten bereits vor dem vollständigen Empfang eines Paketes zu nutzen. Die Protokollverarbeitung wurde vollständig in Hardware umgesetzt, welche alle Verarbeitungsschritte zwischen der GBit-Schnittstelle des PHYs und der systeminternen Datenschnittstelle vornimmt. Im Rahmen einer Fallstudie wurde ein FPGA-basierter Systemaufbau zur quantitativen Ermittlung der Kommunikationseigenschaften umgesetzt. In jedem Zyklus sendet dabei eine Zentralsteuerung Echtzeitdaten zur Ansteuerung von IGBT-Umrichter-Brücken und empfängt jeweils Strommesswerte. Für die in der Anwendung relevanten Mengen an zu übertragenden Echtzeitdaten wurden an dem Aufbau Endezu- Ende-Latenzen in der Größenordnung < 1 μs sowie ein Jitter < 50 ns gemessen. Aufgrund der Protokollverarbeitung repräsentieren diese Werte die Kommunikationseigenschaften zwischen den späteren Applikationen, welche in der Steuerung und den verteilten IGBT-Umrichterbrücken ausgeführt werden.
title: Earning childhood in Manila, Philippines : working children's agency in their everyday life
Creators: name: Kitada, Yuko
Publisher: name: The Australian National University
Year: 2005
Subjects: subject: HD6250.P63M355 2005
subject: Child labor Philippines Manila
subject: Children Social conditionsPhilippines Manila
subject: Children Economic conditionsPhilippines Manila

description: This is an ethnography of working children in an urban low-income neighbourhood in Manila, the Philippines. What does it mean for the children to be working? In answering this question, I aim to bring in the children's point of view in understanding childhood in order to account for their agency. Previous studies of working children have focused on social structures in accounting for the situation of working children, and laid less emphasis on the capacity, agency and power of children to craft their own lives under difficult conditions of poverty and deprivation. This thesis tries to give a more balanced picture of working children's lives than was often the case in previous reports of child labour, that is, children as victims of poverty. Studies of childhood in social sciences have largely been characterised by the 'socialisation' paradigm which viewed children as blank slates to be written on, and as objects of adult activities. Since the late 1980s, a new paradigm, often referred to as the 'new sociology of childhood', emerged. This called for recognition of children as social actors with their own view of the world that may be different from adults. A particular concept of childhood emerged by the early 20th century in industrialising countries that childhood is a special period in one's life characterised by innocence and dependency. Within that concept, study and play are deemed appropriate for children, but not work or adult-like responsibilities. One main argument condemning chid labour is based on this particular concept of childhood which sees working children as being denied childhood. However, work is an important part of childhood in the context of poverty in Paco and Pandacan, Manila. I argue that contrary to the imagery of 'lost childhood' of working children, working children in Paco and Pandacan, in fact, 'earn' their own childhood through working. Work makes it possible for the children to have what they consider important in their lives, namely education and being part of the family. The particular concept of childhood with the image of children as vulnerable and dependent, and in need of protection, has increasingly become an 'international gold standard' for childhood. However, this thesis argues that denying children work marginalises them from production of value and hinders us from recognising children's active contribution to their own lives as well as to others.
High-sensitivity monitoring of micromechanical vibration using optical whispering gallery mode resonators
Creators: name: Schliesser, A.
name: Anetsberger, G.
name: Rivière, R.
name: Arcizet, O.
name: Kippenberg, T. J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The inherent coupling of optical and mechanical modes in high finesse optical microresonators provide a natural, highly sensitive transduction mechanism for micromechanical vibrations. Using homodyne and polarization spectroscopy techniques, we achieve shot-noise limited displacement sensitivities of 10^(-19) m Hz^(-1/2). In an unprecedented manner, this enables the detection and study of a variety of mechanical modes, which are identified as radial breathing, flexural and torsional modes using 3-dimensional finite element modelling. Furthermore, a broadband equivalent displacement noise is measured and found to agree well with models for thermorefractive noise in silica dielectric cavities. Implications for ground-state cooling, displacement sensing and Kerr squeezing are discussed.
description: 25 pages, 8 figures
title: This is our place : fishing families and cosmopolitans on Negros Island, Philippines
Creators: name: Knudsen, Magne
Publisher: name: The Australian National University
Year: 2009
Subjects: subject: GN671.P5 K58 2009
subject: Peasants Philippines Negros Island
subject: Fishing Social aspects Philippines Negros Island
subject: Ethnology Philippines
subject: Capitalism Philippines Negros Island
subject: Maritime anthropology Philippines
subject: Negros Island (Philippines) Social conditions

description: Based on a case study from a peri-urban location in the Visayas, in the municipality of Sibulan on Negros Island, this dissertation argues that the significance of territoriality, co-residence, small-scale fishing and pioneer settler status as determinants of community and identity have for many coastal dwellers become more - not less important in recent times. Localism as an orientation and commitment to place of residence has in fact grown under the pressures of cosmopolitanism. In contrast to those literatures on peasant and indigenous communities which describe fragmentation, proletarianisation, or the persistence of traditional forms of community under conditions of modernity, this thesis identifies an evolving process of place-based community formation. The analysis of how localism and cosmopolitanism inter-relate brings out differences in the valuation and prestige of small-scale fishing, place-based forms of living, and the significance of the distinction between early settlers and newcomers. Growing cosmopolitan influence in the coastal zone, reflected in a booming ‘beachfront property’ market and efforts to protect coral reefs by establishing Marine Protected Areas, encourages particular coastal dwellers to ground themselves to place by establishing pioneer settler status and by claiming “this is our place.” Incoming beach house owners with wealth establish themselves along the coastline and some of them cultivate relations with these pioneer settlers. While members of families with pioneer settler status are able to feed off and exploit cosmopolitanisms to consolidate localism or to pursue ‘middle class’ status oriented to the wider cosmopolitan society, coastal dwellers without such status face new hurdles. Those families without kinship links to the ‘original people of the place’ are prevented from ‘becoming local’ and increasingly marginalised from wider neighbourhood communities.
title: Isolation and Characterization of Autosomal Male Sterile Mutants in Drosophila melanogaster
Creators: name: Romrell, Lynn J.
Publisher: name: Utah State University
Year: 1971

description: In order to study the genetic control of spermiogenesis, recessive, male-sterile, autosomal mutants of Drosophila melanogaster were induced with ethyl methanesulfonate. A total of 31 mutants were recovered, 15 of which were located on the second chromosome and 16 on the third chromosome. Eight second- and 6 third-chromosome mutants demonstrating sterility in all homozygous males were used for further analysis.
Complementation tests showed that 2 of the 8 second chromosome mutants (and none of the 6 third chromosome mutants) were noncomplementing, indicating that two of the mutants produced were alleles of the same locus. Mapping of the second chromosome mutants indicated a clustering near the heterochromatin in the left arm.
In 2 of the mutants, spermiogenesis was studied with the light and electron microscopes. Mutant C2-3 has an anomaly associated with cytokinesis accompanying meiosis. The primary spermatocyte undergoes nuclear division, but a failure of cytokinesis leaves 4 spermatids to develop within a common cytoplasm. The mitochondria fuse, usually forming a single large nebenkern, which then divides into two approximately equal parts, as normal nebenkern does. In the mutant these two mitochodrial derivatives usually undergo further division generally giving rise to 8 or fewer mitochondrial derivatives. Multiple paracrystalline bodies are often observed in the primary mitochondrial derivatives. Up to 4 paracrystalline bodies may form, one at each contact point between the membranes of the primary mitochondrial derivative and the membranes around the four axonemes contained in the common cytoplasmic unit. The groups of 4 spematids almost complete maturation before the bundles degenerate.
Mutant C2-10 is characterized by two anomalies: (1) disruption of the axonemal complex, and (2) formation of multiple paracrystalline bodies within the primary mitochondrial derivative. This mutant undergoes limited elongation with some variation between bundles of maturing spermatids. Axonemal complexes apparently complete differentiation even through disrupted and scattered in the cytoplasm. Mitochondrial derivatives are often very large and contain several paracrystalline bodies. The paracrystalline bodies form within the primary mitochondrial derivatives at contact points between the membranes of the derivative and the cytoplasmic membranes. Abnormally large numbers of microtubules are observed within spermatids containing large mitochondrial derivatives and appear to be rather uniformly distributed around the derivatives. The large derivative size is presumed to be due to failure of normal elongation. Spermatids degenerate rather late in the maturation process.
Cooperative multi-target localization with noisy sensors
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2013
Subjects: cs.RO
cs.MA

description: This paper addresses the task of searching for an unknown number of static targets within a known obstacle map using a team of mobile robots equipped with noisy, limited field-of-view sensors. Such sensors may fail to detect a subset of the visible targets or return false positive detections. These measurement sets are used to localize the targets using the Probability Hypothesis Density, or PHD, filter. Robots communicate with each other on a local peer-to-peer basis and with a server or the cloud via access points, exchanging measurements and poses to update their belief about the targets and plan future actions. The server provides a mechanism to collect and synthesize information from all robots and to share the global, albeit time-delayed, belief state to robots near access points. We design a decentralized control scheme that exploits this communication architecture and the PHD representation of the belief state. Specifically, robots move to maximize mutual information between the target set and measurements, both self-collected and those available by accessing the server, balancing local exploration with sharing knowledge across the team. Furthermore, robots coordinate their actions with other robots exploring the same local region of the environment. © 2013 IEEE.
title: Fishing for fairness : poverty, morality and marine resource regulation in the Calamianes Islands, Philippines
Creators: name: Fabinyi, Michael
Publisher: name: The Australian National University
Year: 2009
Subjects: subject: HC453.5 F33 2009
subject: Sustainable development Philippines Calamian Islands
subject: Fisheries Economic aspects Philippines Calamian Islands
subject: Fishery policy Philippines
subject: Poverty Philippines Calamian Islands

description: This thesis examines the ways local people understand and represent the relationship between poverty and the environment. It does so through a case study of fishers' responses to marine resource regulations in the Philippines. Set in the 'resource frontier' of Palawan's Calamianes Islands, the thesis develops an explicitly cultural perspective on environmental politics. It draws on data from fieldwork with fishers, government and NGO officials, fish traders and tourism operators to show how the strategic responses of fishers to conservation initiatives are couched within particular cultural idioms. Tapping into broader notions of morality in the Philippines, fishers express a discourse that emphasises their poverty and the obligations of the wealthy to treat them with fairness. By deploying this discourse, fishers are thus able to reframe what are — on the surface — questions of environmental management into issues about poverty within particular social relationships. By using a cultural political ecology framework to analyse fishers' responses to regulation, this thesis describes fishers' distinctive contributions to the outcomes of marine resource management initiatives.
$\texttt{GRASS}$: Distinguishing Planet-induced Doppler Signatures from Granulation with a Synthetic Spectra Generator
Creators: name: Palumbo, Michael L.
name: Ford, Eric B.
name: Wright, Jason T.
name: Mahadevan, Suvrath
name: Wise, Alexander W.
name: Löhner-Böttcher, Johannes
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Owing to recent advances in radial-velocity instrumentation and observation techniques, the detection of Earth-mass planets around Sun-like stars may soon be primarily limited by intrinsic stellar variability. Several processes contribute to this variability, including starspots, pulsations, and granulation. Although many previous studies have focused on techniques to mitigate signals from pulsations and other types of magnetic activity, granulation noise has to date only been partially addressed by empirically-motivated observation strategies and magnetohydrodynamic simulations. To address this deficit, we present the GRanulation And Spectrum Simulator ($\texttt{GRASS}$), a new tool designed to create time-series synthetic spectra with granulation-driven variability from spatially- and temporally-resolved observations of solar absorption lines. In this work, we present $\texttt{GRASS}$, detail its methodology, and validate its model against disk-integrated solar observations. As a first-of-its-kind empirical model for spectral variability due to granulation in a star with perfectly known center-of-mass radial-velocity behavior, $\texttt{GRASS}$ is an important tool for testing new methods of disentangling granular line-shape changes from true Doppler shifts.
description: 18 pages, 7 figures, 2 tables, accepted for publication in The Astronomical Journal
title: Effects of DMSO and Propham on Mitosis in Root Tips of Secale cereale
Creators: name: Rosequist, Max
Publisher: name: Utah State University
Year: 1971

description: DMSO (dimethyl sulfoxide) and propham (isopropyl carbanilate) were investigated to determine their effect singly and in combination on mitoses in rye (Secale cereale) root tip cells. Root tips were prepared for observation by the paraffin and aceto-carmine squash methods. Results showed DMSO caused the following abnormalities: arrested metaphases, multipolar spindles, multinucleate cells, stickiness, shortened chromosomes, and mitotic inhibition. Cells from propham treated root tips exhibited the same abnormalities as those treated with DMSO. In addition, propham treatments resulted in polyploid cells and chromosome granulation. In combination, DMSO and propham caused all the abnormalities mentioned above except polyploidy. In the combination abnormalities were more frequent and occurred more rapidly.
Search for B --> K* nu anti-nu decays
Creators: name: The BABAR Collaboration
name: Aubert, B.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We present a search for the decays $B \to K^{*} ν\barν$ using 454$\times10^{6}$ $B \bar{B}$ pairs collected at the $Υ(4S)$ resonance with the $mbox{\slshape B\kern-0.1em{\smaller A}\kern-0.1em B\kern-0.1em{\smaller A\kern-0.2em R}}$ detector at the SLAC PEP-II $B$-Factory. We first select an event sample where one $B$ is reconstructed in a semileptonic or hadronic mode with one charmed meson. The remaining particles in the event are then examined to search for a $B \to K^{*} ν\barν$ decay. The charged $K^{*}$ is reconstructed as $ K^{*+} \to K^0_{\scriptscriptstyle S} π^{+}$ or $ K^{*+} \to K^{+} π^{0}$; the neutral $K^{*}$ is identified in the $K^{*0} \to K^{+} π^{-}$ mode. We establish upper limits at 90% confidence level of $\matchal{B}(B^{+} \to K^{*+} ν\barν) < 8 \times 10^{-5}$, $\matchal{B}(B^{0} \to K^{*0} ν\barν) < 12 \times 10^{-5}$, and $\matchal{B}(B \to K^{*} ν\barν) < 8 \times 10^{-5}$.
description: 10 pages, 10 postscript figures
title: States, market reforms, and rents : the political economy of telecommunications reform in Malaysia and the Philippines
Creators: name: Salazar, Lorraine Carlos
Publisher: name: The Australian National University
Year: 2004
Subjects: subject: HE8390.6.Z5S25 2004
subject: Telecommunication policy Malaysia
subject: Telecommunication policy Philippines
subject: Political corruption Economic aspects Malaysia
subject: Political corruption Economic aspects Philippines
subject: Rent (Economic theory)
subject: Malaysia Economic policy
subject: Philippines Economic policy

description: This dissertation examines rent-seeking, market reform, and the state capacity in Malaysia and the Philippines. The Philippine state has been characterized as weak and captured by an influential oligarchic class. Conversely, the Malaysian state has been classified as strong and, by some, developmental. In spite of this difference, rent-seeking and patronage networks are prevalent in both countries, and both have adopted market liberalisation over the last twenty years. The key research questions are: • How does the strength or weakness of the state affect the possibility and sustainability of policy reform? • To what extent is reform affected by the nature of groups that support it? • Does market liberalisation invariably remove rents? To address these questions, the dissertation focuses on the telecommunications sector, one of the first to be liberalised in both countries. Using a political economy approach, the dissertation considers how the reform of the telecommunications sector took place and what outcomes it had in each country. Three interrelated arguments are put forward. First, the dissertation challenges conventional depictions of the Malaysian and Philippine states. Despite the weakness of the Philippines state, reform occurred through a coalition for reform that out-manoeuvred vested interests. In Malaysia, although considered a strong state, patronage and rent-seeking played key roles in policy adoption and implementation. Second, the nature of groups supporting reform shape policy implementation and its outcomes. In Malaysia, lobbying for liberalisation came from rent-seekers who were aware of the benefits to be obtained. In the Philippines, by contrast, the coalition favouring liberalisation did not benefit directly from market entry. Third, the study argues that market reforms do not invariably remove rents. While telecommunications liberalisation removed monopoly rents in the Philippines, it created new ones in Malaysia.
Parton distributions from lattice QCD with momentum smearing
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2016
Subjects: hep-lat
hep-ph

description: © Copyright owned by the author(s). In this work we continue our effort to explore a recent proposal, which allows light-cone distributions to be extracted from purely spatial correlations, being thus accessible to lattice methods. In order to test the feasibility of this method, we present our latest results from a twisted mass lattice calculation of the flavor non-singlet momentum, helicity and transversity distributions of the nucleon. Furthermore, we apply a newly proposed momentum improved smearing, which has the potential to reach higher nucleon momenta as required for a safe matching procedure to the physical distribution functions.
Novel technique for the active stabilization of the relative phase between seed and pump in an optical parametric oscillator
Creators: name: Cialdi, Simone
name: Suerra, Edoardo
name: Paris, Matteo G. A.
name: Olivares, Stefano
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We design and demonstrate a novel technique for the active stabilization of the relative phase between seed and pump in an optical parametric oscillator (OPO). We show that two error signals for the stabilization of the OPO frequency, based on Pound-Drever-Hall (PDH), and of the seed-pump relative phase can be obtained just from the reflected beam of the OPO cavity, without the necessity of two different modulation and demodulation stages. We also analyze the effect of the pump in the cavity stabilization for different seed-pump relative phase configurations, resulting in an offset in the PDH error signal, which has to be compensated. Finally, an application of our technique in the reliable generation of squeezed coherent states is presented.
description: 8 pages, 11 figures
title: HERstory: Johanna Van Gogh-Bonger. A Creative and Critical Exploration of the Role a Woman Played in Vincent van Gogh’s Rise to Fame
Creators: name: Smailes, C
Publisher: name: Liverpool John Moores University
Year: 2023

description: Taking Nochlin’s view that, ‘We will need our wit and courage to make sure that women’s voices are heard, their work seen and written about’ (Nochlin, 2015, p. 321), this two-volume thesis by practice addresses why creative women became invisible in two ways – critically and creatively. It responds to Nochlin’s conversation by offering solution within a fictionalised account of Johanna van Gogh-Bonger’s life. The critical thesis (Volume I) deliberates the importance of Nochlin’s battle cry (Nochlin, 1971) and Chicago’s response (The Dinner Party, 1979), alongside the wider questions of ways in which women involved in creative pursuits disappeared from historical narratives and how they are being reimagined in contemporary creative practice. A gatekeeper’s function in the lives of creative women throughout time is measured, by identifying the specific role of the male caretakers who have either deliberately or inadvertently excluded or erased creative women; often, I maintain, simply by privileging those men around them. Additionally, the relevance of counting as a feminist strategy and the need to vocalise numbers in order to identify any disparity in gender representation in areas of the arts, to chart improvement and decline, is argued. A novelist’s ethical and moral responsibilities when fictionalising a real life are also addressed, before identifying the key creative concerns – developing character, plot, voice, secondary characters - while recreating Johanna van Gogh-Bonger on page. The creative work (Volume II), MRS VAN GOGH, is a fictionalised account of the life of Johanna Van Gogh-Bonger, showing what can be done to allow erased women to be both rewritten into historical narratives and to be viewed as equal to creative men. Through this novel, I offer a new way to reconstruct a historical epoch by redefining a once-disappeared creative woman, whose rich life as an artist’s sister-in-law and art dealer’s wife overshadows her key contribution to the reputation-building she undertook for the van Gogh family. The novel, I argue, debates a series of creative and critical questions about the nature of female agency in art movements in the late nineteenth century, illustrating that women were key contributors to Modernist ideas. I conclude that this research project further extends feminist scholarship, asserting a need for continued conversation about the contribution made by creative women to the arts
Activated dynamics and effective temperature in a steady state sheared glass
Creators: name: Haxton, Thomas K.
name: Liu, Andrea J.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We conduct nonequilibrium molecular dynamics simulations to measure the shear stress, the average inherent structure energy, and the effective temperature $T_{eff}$ of a sheared model glass as a function of bath temperature $T$ and shear strain rate. For $T$ above the glass transition temperature $T_0$, the rheology approaches a Newtonian limit and $T_{eff}$ approaches $T$ as the strain rate approaches zero, while for $T
description: 4 pages, 2 figures. Revised to include additional data. Inherent structure energy results were included, and much of the shear transformation zone discussion was removed
title: An Electrophysiological Study of the Oral Plate Sensory Organs of the Honey Bee (Apis mellifera L.)
Creators: name: Seeley, Rodney R.
Publisher: name: Utah State University
Year: 1971

description: The oral plate sense organs of the honey bee, Apis mellifera L. , have been investigated employing an electrophysiological technique which allows simultaneous stimulation and recording.
The results of the study present evidence that the four bipolar sense cells innervating the sensory papillae on the oral surface of the hypopharynx are chemoreceptors. The sensory papillae respond to cations, glucose, water, and amino acids. Evidence for the absence of a mechanosensory cell is presented. The data concerning the sensory structures agree with the current theories of chemoreception.
Conditional independence structures over four discrete random variables revisited: conditional Ingleton inequalities
Creators: name: Studeny, Milan
Publisher: name: arXiv
Year: 2020
Subjects: subject: Information Theory (cs.IT)
subject: Artificial Intelligence (cs.AI)
subject: Combinatorics (math.CO)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics
subject: 94A17 68T37 52B40

description: The paper deals with conditional linear information inequalities valid for entropy functions induced by discrete random variables. Specifically, the so-called conditional Ingleton inequalities are in the center of interest: these are valid under conditional independence assumptions on the inducing random variables. We discuss five inequalities of this particular type, four of which has appeared earlier in the literature. Besides the proof of the new fifth inequality, simpler proofs of (some of) former inequalities are presented. These five information inequalities are used to characterize all conditional independence structures induced by four discrete random variables.
Unstable attractors in manifolds
Creators: name: Sánchez-Gabites, J. J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Dynamical Systems (math.DS)
subject: Algebraic Topology (math.AT)
subject: FOS: Mathematics
subject: 54H20, 57N65

description: Let $M$ be a locally compact metric space endowed with a continuous flow $ϕ: M \times \mathbb{R} \longrightarrow M$. Frequently an attractor $K$ for $ϕ$ exists which is of interest, not only in itself but also the dynamics in its basin of attraction $\mathcal{A}(K)$. In this paper the class of {\sl attractors with no external explosions}, which is intermediate between the well known {\sl stable attractors} and the extremely wild {\sl unstable attractors}, is studied. We are mainly interested in their cohomological properties, as well as in the strong relations which exist between their shape (in the sense of Borsuk) and the topology of the phase space.
description: 26 pages
title: Additive Manufacturing Based on Electrochemistry
Creators: name: Viktorova, Jekaterina
Publisher: name: The Australian National University
Year: 2024

description: A fabrication method combining 3D printing and multi-material electrodeposition is introduced in this thesis. The method combines electrochemical and three-dimensional control of electrode positions to culminate in a new process for 2D patterning and the 3D printing of metals, semiconductors, as well as polymers into complex shapes with feature sizes as small as 10 um. The method specifically allows access to patterned or printed, previously difficult-to-process electrically conductive pi-conjugated polymers. The technique uses electrodes in a solution of an electrodepositable material to perform electrochemical printing, a process that can be controlled by varying the inter-electrode gap, the applied potential or current, the electrode geometry and dimension, the electrodeposition solution (ink), movement direction, and movement speed. The first chapter introduces the concepts of electrodeposition and localized electrodeposition and applies them to electrochemical printing. It also explores the influence of the different parameters which affect the printing process and introduces the types of materials that can be printed using this method. In Chapter 2, electrochemical printing is shown to have a unique combination of speed and resolution, multi-material printing, and morphology control, culminating in multi-material device fabrication. In Chapter 3, the first steps are made in monitoring the electrochemical reactions and localized deposition processes in-situ by combining electrochemical analytical methods such as cyclic voltammetry and chronoamperometry with electrochemical quartz crystal microgravimetry. Using poly(3,4-ethylenedioxythiophene) (PEDOT) as a model system, we study the effects that the composition of the supporting electrolyte and solvent used, de-oxygenation and monomer concentration had on the polymerization yield. In Chapter 4, a brand-new approach involving the ferrocene-mediated cationic electrochemical printing of bisphenol A diglycidyl ether and tris[4-hydroxyphenyl] methane triglycidyl ether) based on electrochemically controlled ring-opening polymerization is demonstrated. The development of this novel fabrication method combining 3D printing and multi-material electrodeposition opens new pathways for advanced material design and manufacturing. By enabling precise, controlled deposition of metals, semiconductors, and conductive polymers in complex 2D and 3D architectures, this technique can significantly enhance applications in fields such as flexible electronics, biosensors, and energy storage devices. The ability to pattern previously hard-to-process conductive polymers also presents opportunities for innovations in organic electronics and optoelectronic devices. The versatility and scalability of this method position it as a promising platform for future research and development in multi-material printing and electrochemical manufacturing, potentially unlocking the production of functional materials and devices.
Periodic cavity state revivals from atomic frequency combs
Creators: name: Zens, Matthias
name: Krimer, Dmitry O.
name: Dhar, Himadri S.
name: Rotter, Stefan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Spin ensembles with a comb-shaped spectrum have shown exciting properties as efficient quantum memories. Here, we present a rigorous theoretical study of such atomic frequency combs in the strong coupling limit of cavity QED, based on a full quantum treatment using tensor-network methods. Our results demonstrate that arbitrary multi-photon states in the cavity are almost perfectly absorbed by the spin ensemble and re-emitted as parity-flipped states at periodic time intervals. Fidelity values near unity are achieved in these revived states by compensating for energy shifts induced by the strong spin-cavity coupling through adjustments of individual coupling values of the teeth in the atomic frequency comb.
description: 5 pages, 3 figures
Accounting for the Unresolved X-ray Background with Sterile Neutrino Dark Matter
Creators: name: Cumberbatch, Daniel
name: Silk, Joseph
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We consider a scenario where keV sterile neutrinos constitute all of the currently inferred dark matter abundance, whose radiative decays could potentially account for the flux contributions to the X-ray background attributed to unresolved sources. Here we apply integrated flux methods to results from the observations of the North and South Chandra deep fields in order to deduce constraints on the sterile neutrino mass-mixing parameters.
description: To be published in the conference proceedings for the ''13th International Symposium on Particles, Strings and Cosmology'' (PASCOS-07), by the American Institute of Physics (AIP)
The Archaic Universe: Big Bang, Cosmological Term and the Quantum Origin of Time in Projective Cosmology
Creators: name: Licata, Ignazio
name: Chiatti, Leonardo
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: This article proposes some cosmological reflections at the qualitative and conjectural level, suggested by the Fantappie & Arcidiacono projective relativity theory. The difference will firstly be discussed between two types of singularity in this theory: geometric (de Sitter horizon) and physical (big bang, big crunch). The reasons for the existence of geometric singularities are deeply rooted in the principle of inertia and in the principle of relativity, while physical singularities are associated with the creation or destruction of matter. In this framework, quantum mechanics is introduced through a particular interpretation of Bohm holomovement. Finally, a possible mechanism is discussed for the genesis of the cosmological term. No form of inflation appears in the scenario described.
description: 17 pgs
Sign patterns and rigid moduli orders
Creators: name: Gati, Yousra
name: Kostov, Vladimir Petrov
name: Tarchi, Mohamed Chaouki
Publisher: name: arXiv
Year: 2020
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics

description: We consider the set of monic degree $d$ real univariate polynomials $Q_d=x^d+\sum_{j=0}^{d-1}a_jx^j$ and its {\em hyperbolicity domain} $Π_d$, i.e. the subset of values of the coefficients $a_j$ for which the polynomial $Q_d$ has all roots real. The subset $E_d\subset Π_d$ is the one on which a modulus of a negative root of $Q_d$ is equal to a positive root of $Q_d$. At a point, where $Q_d$ has $d$ distinct roots with exactly $s$ ($1\leq s\leq [d/2]$) equalities between positive roots and moduli of negative roots, the set $E_d$ is locally the transversal intersection of $s$ smooth hypersurfaces. At a point, where $Q_d$ has two double opposite roots and no other equalities between moduli of roots, the set $E_d$ is locally the direct product of $\mathbb{R}^{d-3}$ and a hypersurface in $\mathbb{R}^3$ having a Whitney umbrella singularity. For $d\leq 4$, we draw pictures of the sets $Π_d$ and~$E_d$.
Selbstduale Vertexoperatorsuperalgebren und das Babymonster (Self-dual Vertex Operator Super Algebras and the Baby Monster)
Creators: name: Hoehn, Gerald
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Algebra (math.QA)
subject: Group Theory (math.GR)
subject: FOS: Mathematics

description: We investigate self-dual vertex operator algebras (VOAs) and super algebras (SVOAs). Using the genus one correlation functions, it is shown that self-dual SVOAs exist only for half-integral central charges. It is described how self-dual SVOAs can be constructed from self-dual VOAs of larger central charge. The analogy with integral lattices and binary codes is emphasized. One main result is the construction of the shorter Moonshine module, a self-dual SVOA of central charge 23.5 on which the Baby monster - the second largest sporadic simple group - acts by automorphisms. The shorter Moonshine module has the character q^(-47/48)*(1+ 4371q^(3/2)+ 96256q^2+ 1143745q^(5/2) +...) and is the "shorter cousin" of the Moonshine module. Its lattice and code analog are the shorter Leech lattice and shorter Golay code. We conjecture that the shorter Moonshine module is the unique SVOA with this character. The final chapter introduces the notion of extremal VOAs and SVOAs. These are self-dual (S)VOAs with character having the same first few coefficients as the vacuum representation of the Virasoro algebra of the same central charge. We show that extremal VOAs exist at least for the central charges 8, 16, 24, 32, 40 and that extremal SVOAs exist only for the central charges c=0.5, 1, ..., 7.5, 8, 12, 14, 15, 15.5, 23.5 and 24. Examples for c=24 (resp. 23.5) are the (shorter) Moonshine module. Again, our results are similar to results known for codes and lattices.
description: 91 pages with 1 figure and 5 tables; Ph.D. thesis, Bonn University, 1995; in German; LaTeX 2.09. An English translation appears in the future under the same paper number as version 2
First-principles study of the crystal structure, electronic structure, and transport properties of NiTe$_2$ under pressure
Creators: name: Zhang, Jian-Feng
name: Zhao, Yawen
name: Liu, Kai
name: Liu, Yi
name: Lu, Zhong-Yi
Publisher: name: arXiv
Year: 2021
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Recent experiments showed the distinct observations on the transition metal ditelluride NiTe$_2$ under pressure: one reported a superconducting phase transition at 12 GPa, whereas another observed a sign reversal of Hall resistivity at 16 GPa without the appearance of superconductivity. To clarify the controversial experimental phenomena, we have carried out first-principles electronic structure calculations on the compressed NiTe$_2$ with structure searching and optimization. Our calculations show that the pressure can transform NiTe$_2$ from a layered P-3m1 phase to a cubic Pa-3 phase at $\sim$10 GPa. Meanwhile, both the P-3m1 and Pa-3 phases possess nontrivial topological properties. The calculated superconducting $T_c$'s for these two phases based on the electron-phonon coupling theory both approach 0 K. Further magnetic transport calculations reveal that the sign of Hall resistance for the Pa-3 phase is sensitive to the pressure and the charge doping, in contrast to the case of the P-3m1 phase. Our theoretical predictions on the compressed NiTe$_2$ wait for careful experimental examinations.
description: 6 pages, 4 figures, 3 tables
Nucleon spin and quark content at the physical point
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2016
Subjects: hep-lat
hep-ph
nucl-th

description: © Copyright owned by the author(s). We present results on the spin and quark content of the nucleon using Nf =2 twisted mass cloverimproved fermion simulations with a pion mass close to its physical value. We use recently developed methods to obtain accurate results for both connected and disconnected contributions. We provide results for the axial charge, quark and gluon momentum fraction as well as the light, strange and charm sσ-terms.
Massive Boson-Fermion Degeneracy and the Early Structure of the Universe
Creators: name: Kounnas, Costas
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The existence of a new kind of massive boson-fermion symmetry is shown explicitly in the framework of the heterotic, type II and type II orientifold superstring theories. The target space-time is two-dimensional. Higher dimensional models are defined via large marginal deformations of JxJ-type. The spectrum of the initial undeformed two dimensional vacuum consists of massless boson degrees of freedom, while all massive boson and fermion degrees of freedom exhibit a new Massive Spectrum Degeneracy Symmetry (MSDS). This precise property, distinguishes the MSDS theories from the well known supersymmetric SUSY-theories. Some proposals are stated in the framework of these theories concerning the structure of: (i) The Early Non-singular Phase of the Universe, (ii) The two dimensional boundary theory of AdS3 Black-Holes, (iii) Plausible applications of the MSDS theories in particle physics, alternative to SUSY.
description: 24 pages
ASSURED Data Management Plan
Creators: name: Asanova Sabina
name: Noshin Omar
name: Mayet, Clément
Publisher: name: Zenodo
Year: 2019
Subjects: ORDP; Data Management

description: The Data Management Plan as a part of the Open Research Data Pilot (ORDP) is a document that describes a structured approach and methodology towards management of all data that is planned to be collected, analysed or generated in the course of the ASSURED project. The main aim of this document is to ensure that all data available in ASSURED is findable, accessible, interoperable and re-usable/ re-producible (FAIR).

In Section 3, main objectives of ASSURED and Data Management Plan are introduced. Cooperation Tool – as the primary internal online storage platform – will be described shortly in Section 4. Chapters 5, 6, 7 handle the categorisation of the ASSURED data along with the methodology for selection of the data, its preservation and data sharing. Section 8 concerns responsibilities and resources. Last section explains the obligations towards IPR and ethical considerations in ASSURED.

Much of the information required in the document has been earlier described in details in D1.6 Quality Assurance Guidelines and D11.1 Dissemination strategy. Therefore, the DMP should be seen as complimentary to the above-mentioned deliverables.

In addition, DMP should be considered as a living document that will be updated and expanded throughout lifetime of the ASSURED project.

The objectives related to this deliverable have been achieved in full and as scheduled for this initial stage.
Nucleon electromagnetic and axial form factors with Nf=2 twisted mass fermions at the physical point
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2016
Subjects: hep-lat

description: © Copyright owned by the author(s). We present results for the nucleon electromagnetic and axial form factors using an Nf=2 twisted mass fermion ensemble with pion mass of about 131 MeV. We use multiple sink-source separations to identify excited state contamination. Dipole masses for the momentum dependence of the form factors are extracted and compared to experiment, as is the nucleon magnetic moment and charge and magnetic radii.
Information evolution in the interior of an axially symmetric BTZ black hole
Creators: name: Ali, Shad
name: Kamran, Muhammad Arshad
name: Khan, Misbah Ullah
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this paper, we consider an axially symmetric $(2+1)-$dimensional rotating Banados-Teitelboim-Zanelli (BTZ) black hole to investigate its interior \textbf{information}. First, we choose a largest space-like hyper-surface at $r_v=0.45$ and calculate the maximal interior volume bound by it. We found the interior volume to increase with advance time $v$. Similarly, the \textbf{scalar} quantum mode entropy \textbf{is} also found to increase with advance time. Next\textbf{,} considering two important assumptions, an evolution relation is obtained between \textbf{the variation of scalar} quantum mode entropy and Bekenstein Hawking entropy \textbf{for an} infinitesimal interval of time. In contrast to the evolution relation of higher dimensional black holes, the characteristic feature of this relation is its increase with extremely large increase in black hole mass. Moreover, this work extends the notion of black hole evaporation idea to lower space-time dimensions.
description: 11 Pages, 3 figures, Journal Article Phys. Scr. (2022)
Asteroseismological constraints on the coolest GW Vir variable star (PG 1159-type)PG 0122+200
Creators: name: Córsico, A. H.
name: Bertolami, M. M. Miller
name: Althaus, L. G.
name: Vauclair, G.
name: Werner, K.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present an asteroseismological study on PG 0122+200, the coolest known pulsating PG1159 (GW Vir) star. Our results are based on an augmented set of the full PG1159 evolutionary models recently presented by Miller Bertolami & Althaus (2006). We perform extensive computations of adiabatic g-mode pulsation periods on PG1159 evolutionary models with stellar masses ranging from 0.530 to 0.741 Msun. We derive a stellar mass of 0.626 Msun from a comparison between the observed period spacing and the computed asymptotic period spacing, and a stellar mass of 0.567 Msun by comparing the observed period spacing with the average of the computed period spacing. We also find, on the basis of a period-fit procedure, an asteroseismological model representative of PG 0122+200 which is able to reproduce the observed period pattern with an average of the period differences of 0.88 s. The model has an effective temperature of 81500 K, a stellar mass of 0.556 Msun, a surface gravity log g= 7.65, a stellar luminosity and radius of log(L/Lsun)= 1.14 and log(R/Rsun)= -1.73, respectively, and a He-rich envelope thickness of Menv= 0.019 Msun. We derive a seismic distance of about 614 pc and a parallax of about 1.6 mas. The results of the period-fit analysis carried out in this work suggest that the asteroseismological mass of PG 0122+200 could be 6-20 % lower than thought hitherto and in closer agreement (to within 5 %) with the spectroscopic mass. This result suggests that a reasonable consistency between the stellar mass values obtained from spectroscopy and asteroseismology can be expected when detailed PG1159 evolutionary models are considered.
description: 10 pages, 6 figures. To be published in Astronomy & Astrophysics