cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
I4.0 på Datamatikeruddannelsen
Creators: name: Iversen, Mogens Holm
name: Knoll, Istvan
name: Nordbjerg, Finn E.
Publisher: name: UCN Perspektiv
Year: 2021

description: Over den seneste årrække er Internet of Things (IoT) og Industri 4.0 (i4.0) kommet i voksende fokus. Derfor er det yderst relevant, at datamatikeruddannelsens dimittender forberedes til at kunne understøtte aftagervirksomhederne inden for i4.0. Derfor eksperimenter vi med at indføre brug af i4.0-teknologier i programmeringsundervisningen. Eksperimentet antager, at motivation og læring øges, når den studerende arbejder med noget konkret (fysisk). Spørgsmålet er, om den forøgede kompleksitet vil påvirke læringen negativt. De studerende inddeles i en interventionsgruppe, som deltager i forsøget, og en referencegruppe, som deltager i et uændret forløb. Begge grupper testes i forhold til læringsmål før og efter forløbet. De foreløbige resultater viser, at det ikke kan påvises, at interventionsgruppen lærer mindre inden for programmeringsfagets centrale læringsmål end referencegruppen. Endvidere er der indikationer på, at motivation og læring forøges i interventionsgruppen. Derfor overvejes det og diskuteres, hvordan brugen af disse eksempler og teknologier i undervisningen kan inddrages bredere i undervisningen.
description: UCN Perspektiv, Nr. 9 (2021): Teknologi
Composite Dirac Neutrinos
Creators: name: Grossman, Yuval
name: Robinson, Dean J
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present a mechanism that naturally produces light Dirac neutrinos. The basic idea is that the right-handed neutrinos are composite. Any realistic composite model must involve `hidden flavor' chiral symmetries. In general some of these symmetries may survive confinement, and in particular, one of them manifests itself at low energy as an exact $B-L$ symmetry. Dirac neutrinos are therefore produced. The neutrinos are naturally light due to compositeness. In general, sterile states are present in the model, some of them can naturally be warm dark matter candidates.
description: 12 pages; Sec. IIC updated; minor corrections; published version
Holdninger til træbyggeri
Creators: name: Heiselberg, Hans Lyche Dahl
name: Selman, Aysar Dawod
name: Søgaard, Lars
Publisher: name: UCN Perspektiv
Year: 2021

description: Med baggrund i de kommende krav til bæredygtighed i byggeriet i forbindelse med regeringens klimamål for 2030 skal CO2-belastningen fra byggeprocessen reduceres. Træbaserede byggematerialer har ofte en lavere CO2-udledning end traditionelle materialer på nogle områder i byggeriet. Forskning peger på, at det kan være en del af løsningen, og dette bliver omtalt som et paradigmeskifte. Formålet med artiklen er at undersøge holdninger til træbyggeri. Der er interviewet tre forskellige aktører inden for forskellige brancher i byggeriet i Nordjylland. Der er opnået indsigt i deres strategier for bæredygtighed. Interviewene afdækker, at en funktionel tilgang til materialevalg er den foretrukne, hvilket harmonerer med nylig forskning inden for byggebranchen. Holdningerne til udviklingen imod bæredygtigt byggeri drives af lovgivning, selv om der også er en af de interviewede der i kraft af egne idealer arbejder i den retning. Mere træbyggeri kræver viden og uddannelse, fordi der er tale om et paradigmeskifte i byggeriet.
description: UCN Perspektiv, Nr. 9 (2021): Teknologi
Complex twist flows on surface group representations and the local shape of the deformation space of hyperbolic cone-3-manifolds
Creators: name: Montcouquiol, Grégoire
name: Weiß, Hartmut
Publisher: name: arXiv
Year: 2010
Subjects: subject: Differential Geometry (math.DG)
subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 57M50, 58D27, 53C35

description: In two former papers, the authors independently proved that the space of hyperbolic cone-3-manifolds with cone angles less than 2π and fixed singular locus is locally parametrized by the cone angles. In this sequel, we investigate the local shape of the deformation space when the singular locus is no longer fixed, i.e. when the singular vertices can be split. We show that the different possible splittings correspond to specific pair-of-pants decompositions of the smooth parts of the links of the singular vertices, and that under suitable assumptions the corresponding subspace of deformations is parametrized by the cone angles of the original edges and the lengths of the new ones.
description: 43 pages, 7 figures, title changed, overall organization of the paper modified, some corrections, new material added
Fremstillingen af samarbejde i byggeriet
Creators: name: Klitgaard, Anne
name: Gottlieb, Stefan Christoffer
Publisher: name: UCN Perspektiv
Year: 2021

description: Baggrund: Samarbejde og bedre styring af processer anses som løsningen til den lave produktivitetsstigning i byggebranchen. Men forskning antyder, at en stram styring af processer kan hindre ændringer af selve processerne, hvilket er en forudsætning for problemløsning mod produktivitetsstigning. Formål: Samarbejdet er i mange projekter styret af forskrifterne i ”Almindelige betingelser for bygge- og anlægsvirksomheder” (AB), hvorfor forståelsen af samarbejde i forskriften undersøges og relateres til, hvorvidt denne forståelse kan fremme produktivitet i branchen. Metode: Igennem en problematiseringsanalyse skabes en forståelse for, hvilket syn på samarbejde der fremføres i den seneste revision af AB-forskriften, herunder hvilke tiltag der iværksættes for at styre aktørernes adfærd. Resultater: Problemet, som er repræsenteret i betingelserne, er et problem angående et højt konfliktniveau. Problemet antages at kunne løses ved at styre de deltagende aktører vha. en række tiltag. Tiltagene skal sikre, at konflikter undgås. Løsningsforslaget i forskriften er svært for de deltagende aktører at anfægte. Diskussion: Vi adresserer det iboende dilemma i bestemmelserne, hvor de udførende aktører ikke kan stille spørgsmål til den proces, som skal forbedre deres produktivitet, selvom deres spørgsmål måske kunne øge produktiviteten. Konklusion: Fremstillingen af den nuværende forståelse af samarbejde på byggepladsen i det juridiske dokument kan muligvis medvirke til at undgå produktivitetstab i forbindelse med destruktive og ressourcekrævende konflikter, men det er usikkert, om denne forståelse for samarbejde medfører produktivitetsstigning.
description: UCN Perspektiv, Nr. 9 (2021): Teknologi
Dynamic arrest of colloids in porous environments: disentangling crowding and confinement
Creators: name: Kurzidim, Jan
name: Coslovich, Daniele
name: Kahl, Gerhard
Publisher: name: arXiv
Year: 2010
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: Using numerical simulations we study the slow dynamics of a colloidal hard-sphere fluid adsorbed in a matrix of disordered hard-sphere obstacles. We calculate separately the contributions to the single-particle dynamic correlation functions due to free and trapped particles. The separation is based on a Delaunay tessellation to partition the space accessible to the centres of fluid particles into percolating and disconnected voids. We find that the trapping of particles into disconnected voids of the matrix is responsible for the appearance of a nonzero long-time plateau in the single-particle intermediate scattering functions of the full fluid. The subdiffusive exponent $z$, obtained from the logarithmic derivative of the mean-squared displacement, is observed to be essentially unaffected by the motion of trapped particles: close to the percolation transition, we determined $z \simeq 0.5$ for both the full fluid and the particles moving in the percolating void. Notably, the same value of $z$ is found in single-file diffusion and is also predicted by mode-coupling theory along the diffusion-localisation line. We also reveal subtle effects of dynamic heterogeneity in both the free and the trapped component of the fluid particles, and discuss microscopic mechanisms that contribute to this phenomenon.
description: 18 pages, 12 figures, minor changes
title: The ethics of negotiation
Creators: name: Sherwood, Charles N.C.
Publisher: name: London School of Economics and Political Science (LSE)
Year: 2023

description: I argue for the following: (1) Negotiation is a social construct whereby the parties seek to resolve differences and promote cooperation through a process rooted in mutual consent. (2) Negotiation is a feature of imperfect markets. Where there is a negotiated agreement, there is typically a significant cooperative surplus and, instead of a single market price, a range of possibilities as to how that cooperative surplus may be divided between the parties. The purpose of negotiation is to determine exactly where in that range agreement is reached. (3) The fairness of a negotiated agreement is wholly determined by the fairness of the process that leads to that agreement; and the fairness of the process is itself wholly determined by the adequacy of the constraints applied to that process. This makes negotiation an instance of pure procedural justice. In this regard, negotiation is to be clearly distinguished from judgment or binding arbitration. (4) Negotiated agreement itself implies some degree of consent. But beyond that there are pro tanto obligations on negotiators to (a) behave honestly and, in particular, not lie, (b) seek mutually beneficial outcomes, whereby their counterparties are left no worse off than they would be in the event of a failure to agree, and (c) avoid the abuse of extreme asymmetric negotiating leverage, that characterises a combination of monopoly, monopsony or cartel with essential goods and services, and discriminatory pricing. (5) These constraints are both necessary and sufficient to deliver a fair process and, therefore, a fair outcome. (6) Such constraints can be seen, in part, as attempts to counter market failure and compensate for shortfalls in consent. (7) A further constraint, related to the broader demands of distributive justice, is not called for. Such a requirement is the primary responsibility of society as a whole. To the extent that it does fall on any individual, it takes the form of a separate and narrower duty to aid that can, in cases of dire need, take precedence and require that negotiations cease. (8) The fact that these moral constraints leave the outcome of most negotiations less than fully determined is not a weakness, but a strength of this account. It properly captures the character of a negotiation as a cooperative but also partially adversarial process, during the course of which a fair outcome is constructed – importantly, an outcome that is not predetermined.
A Stakeholder-Based Assessment Model (SAM) for Resource -Efficiency Measures in the Construction Industry
Creators: name: Müller, Richard C.
name: Schamber, Olga
name: Volk, Rebekka
name: Schultmann, Frank
Publisher: name: Karlsruhe
Year: 2017
Subjects: Waste management
Resource-efficiency measures
Stakeholder-based Assessment Model

description: In recent decades, the shortage of natural resources like primary raw materials has increasingly shifted into the focus of public discussion and research. Especially in the resource-intensive construction sector the implementation of a circular economy can strongly contribute to a reduction of primary resource demand. Positive developments can be noticed already, but the desired goal of an effective circular economy is still not being reached. For instance, the usage of recycled raw materials as substitutes for primary resources could be significantly higher. 
In order to implement the protection of resources in the construction sector, it is essential to assess resource-saving measures and their impact on conservations as well as stakeholders motivation to implement them. For this purpose, a Stakeholder-based Assessment Model (SAM) is introduced to provide recommendations for political actions and potent measures to foster the circular economy in the construction sector that lead to increased reuse and recycling of construction materials. In the SAM, relevant actors are identified and their characteristics and preferences as well as the level of influence on each other are modelled and validated for Germany. Moreover, available resource-conserving measures concerning the construction sector are identified and related measures are grouped together. Thereupon the influence of measures on stakeholders and their willingness to take positive actions in terms of a circular economy have been investigated and modelled. Relevant model data has been gathered by intensive literature review, surveys and expert interviews.
The results show that measures regarding lifecycle oriented planning of buildings as well as the development of stakeholder cooperation are the most effective ones to save resources and to reduce the disposal of construction material. Furthermore the results demonstrate that a leading role of public authorities is crucial to foster a circular economy.
Three-loop HTL QCD thermodynamics
Creators: name: Andersen, Jens O.
name: Leganger, Lars E.
name: Strickland, Michael
name: Su, Nan
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Theory (hep-th)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The hard-thermal-loop perturbation theory (HTLpt) framework is used to calculate the thermodynamic functions of a quark-gluon plasma to three-loop order. This is the highest order accessible by finite temperature perturbation theory applied to a non-Abelian gauge theory before the high-temperature infrared catastrophe. All ultraviolet divergences are eliminated by renormalization of the vacuum, the HTL mass parameters, and the strong coupling constant. After choosing a prescription for the mass parameters, the three-loop results for the pressure and trace anomaly are found to be in very good agreement with recent lattice data down to $T \sim 2-3\,T_c$, which are temperatures accessible by current and forthcoming heavy-ion collision experiments.
description: 27 pages, 11 figures; corresponds with published version in JHEP
The gravity of light
Creators: name: Sparano, G.
name: Vilasi, G.
name: Vilasi, S.
Publisher: name: arXiv
Year: 2010
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 83C15, 83C35, 83C47

description: A solution of the old problem raised by Tolman, Ehrenfest, Podolsky and Wheeler, concerning the lack of attraction of two light pencils "moving parallel", is proposed, considering that the light can be source of nonlinear gravitational waves corresponding (in the would be quantum theory of gravity) to spin-1 massless particles.
description: Style is changed in standard latex, abstract has been reduced and the order of sections has been changed
Digitale medier iagttaget
Creators: name: Wahl, Christian
Publisher: name: UCN Perspektiv
Year: 2021

description: Denne artikel beskæftiger sig med kommunikation og digitale medier. Ofte bliver digitale medie iagttaget som kommunikationsmedier, altså medier for kommunikation, der ligner den kommunikation, som foregår mundtligt eller skriftligt gennem andre medier. Spørgsmålet, der stilles i denne artikel, er, om vi har brug for at udvide denne forståelse, idet stadigt nye applikationer og digitale medier ændrer forholdet mellem det, vi tidligere kunne omtale som en afsender og en modtager i kommunikationen. Gennem eksempler på digitale medier, der anvender kunstig intelligens og maskinlæring, vil artiklen diskutere dette spørgsmål. Det teoretiske udgangspunkt for denne diskussion vil være den sociologiske systemteori, der bidrager med forståelsen af systemer og kommunikation, og kybernetikken, der beskæftiger sig med regulering og feedback i trivielle og ikke-trivielle maskiner. Ud fra diskussionen vil artiklen argumentere for, at de digitale medier ikke udelukkende kan iagttages som medier for kommunikation, men også i mange sammenhænge som en form for kommunikationspartner.
description: UCN Perspektiv, Nr. 9 (2021): Teknologi
title: Persönliches zu einem Jubiläum - Statement
Creators: name: Mikoletzky, Lorenz
Publisher: name: Universität Graz
Year: 2021

description: 75 Jahre VÖB. 1946–2021, Hg. v. Alker-Windbichler, Bauer und Köstner-Pemsel, 2021, S. 37–39
Unveiling the Nature of Faraway Worlds: Intensive characterisation of K2 transiting exoplanets
Creators: name: Barragan, Oscar
Publisher: name: Zenodo
Year: 2018
Subjects: exoplanets
Astronomy
Astrophysics

description: A new branch of astrophysics was born with the discovery of the first planet orbiting a star other than the Sun. Since then, astronomers have developed techniques to detect and characterise exoplanets. The two more successful techniques are the transit and radial velocity methods. They allow us to measure the planetary radius and minimum mass, respectively. By combining transit photometry with RV measurements, it is possible to measure the true mass and determine the planetary mean density. This allows us to study planets’ internal structure and composition and gives us important hints as to their formation and evolution.

In its extended K2 mission, Kepler is surveying different stellar fields located along the ecliptic, performing 80-day-long continuous observations of 10 000–20 000 stars per campaign. The K2 mission is an unique opportunity to gain knowledge of transiting exoplanets. K2 is targeting a number of bright stars (V < 13 mag) higher than the original Kepler mission. This is a definitive advantage for any RV follow-up observations. The opportunity for exoplanetary science is terrific! We present an intensive high-precision radial velocity follow-up of bright K2 stars (V < 13 mag) hosting transiting planets. We developed numerical tools, which allowed us to simultaneously model radial velocity measurements and transit light curves in order to derive planetary masses and radii.

We derived the masses, radii, and bulk densities of the exoplanets transiting the stars K2-19, K2-98, K2-139, K2-141, K2-111, HD 3167, GJ 9827 observed by K2, and π Mensae observed by TESS. We were able to infer the internal structure, composition, dynamical evolution, tidal interaction, architecture, and the existence/absence of atmospheres of the characterised exoplanets. Some of the planets here presented join the small group of short-period planets known to have rocky terrestrial compositions. The densities of the remaining objects are indicative of planets with a composition comprising a solid core surrounded by a thick atmospheric envelope. Because of the brightness of the host stars, most of the systems here presented are highly suitable for a wide range of further studies to characterise the planetary atmosphere and dynamical properties. This thesis contributes to the exoplanet science by itself. It adds new well-characterised planets to the relatively small sample of super-Earths and Neptunes whose masses and radii are both well-determined. These results will contribute to solve many unanswered questions about the nature of faraway worlds.
Teknologisk understøttede beslutninger
Creators: name: Gade, Peter Nørkjær
Publisher: name: UCN Perspektiv
Year: 2021

description: Teknologien er en vigtig hjælp for at understøtte, at vi kan tage bedre beslutninger. Desværre er en stor fare, at teknologien ikke anvendes korrekt, eller at man decideret undlader at anvende teknologi, fordi man ikke er i stand til at reflektere over teknologiens præmisser. I denne artikel bliver der perspektiveret over forskellige sociotekniske forhold som tro, rationalitet og eksplicitet, der skaber fundamentale aspekter for måden, hvorpå vi anvender teknologi. På baggrund af disse perspektiver bliver Recognition Primed Decision Making-modellen (RPDM) foreslået til at initiere en refleksion over de sociotekniske forhold, der sætter præmisserne for god anvendelse af teknologi. Anvendelse af RPDM-modellen kan potentielt hjælpe til en bedre udnyttelse af teknologien, så den kan hjælpe os med at tage bedre beslutninger.
description: UCN Perspektiv, Nr. 9 (2021): Teknologi
Finite-size effects on the radiative energy loss of a fast parton in hot and dense strongly interacting matter
Creators: name: Caron-Huot, Simon
name: Gale, Charles
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We consider finite-size effects on the radiative energy loss of a fast parton moving in a finite temperature strongly interacting medium, using the light cone path integral formalism put forward by Zakharov. We present a convenient reformulation of the problem which makes possible its exact numerical analysis. This is done by introducing the concept of a radiation rate in the presence of finite-size effects. This effectively extends the finite-temperature approach of AMY (Arnold, Moore, and Yaffe) to include interference between vacuum and medium radiation. We compare results with those obtained in the regime considered by AMY, with those obtained at leading order in an opacity expansion, and with those obtained deep in the LPM (Landau-Pomeranchuk-Migdal) regime.
description: 15 pages, 7 figures, typos and references corrected. Clearer figures. Harmonized with published version
Verwendung von Kapillarsuspensionen als Precursor für die Herstellung hochporöser Sinterwerkstoffe
Creators: name: Dittmann, Jens
Publisher: name: Karlsruhe
Year: 2015
Subjects: Kapillarsuspension
Strukturbildung
poröse Materialien

description: Im Rahmen der vorliegenden Dissertation wird die Formulierung von Kapillarsuspensionen und deren Verwendung als Precusormaterial zur Herstellung hochporöser Sinterwerkstoffe betrachtet. Neben der Verfahrensentwicklung wurden Grundlagenuntersuchungen am Pastensystem sowie daraus hergestellter Sinterteile durchgeführt. Am Beispiel eines keramischen Modellsystems werden wesentliche Eigenschaften von Kapillarsuspensionen mittels systematischer Parametervariation evaluiert.
XR-granskning af installationer
Creators: name: Haahr, Meinhardt Thorlund
Publisher: name: UCN Perspektiv
Year: 2021

description: I forskning og på tværs af industrier er der bred enighed om, at extended reality (XR) – en paraplybetegnelse for virtual reality (VR), augmented reality (AR) og mixed reality (MR) – kan øge effektiviteten af arbejdsprocesser samt forbedre kvaliteten af produktionen generelt. Forskning inden for byggeindustrien indikerer, at denne industri ikke er nogen undtagelse. Frem til nu er teknologierne undersøgt ifm. sikkerhed, ledelse, visualisering, design, granskning, produktion, kvalitetskontrol mm. Disse undersøgelser omfavner dog en bred faglighed inden for byggeindustrien og giver derved ikke en særlig indsigt i anvendelsen af XR ifm. tekniske installationer. Formålet med denne undersøgelse er at afdække eksisterende litteratur inden for forskningsområdet. Ved et indledende scoping review afdækkes den videnskabelige litteratur gennem de seneste 10 år ved søgning i Scopus samt gennemgang af konferenceberetningen ConVR. Ved en statistisk gennemgang af 53 relevante artikler og efterfølgende en deskriptiv gennemgang af 14 heraf udvalgte, viser resultaterne, at XR har potentiale til at forbedre gransknings-, kontrol og produktionsprocesser. Desuden viser det sig, at eksisterende studier i høj grad mangler at blive afprøvet i praksis på aktuelle byggeprojekter, samt at disse studier i mindre grad fokuserer på tekniske installationer.
description: UCN Perspektiv, Nr. 9 (2021): Teknologi
Surface Plasmon Polariton Mediated Coupling of Cavity Modes in Nanostructured Slit Arrays Analyzed by Electron Energy Loss Spectroscopy in a Transmission Electron Microscope
Creators: name: Walther, Roman Michael
Publisher: name: Karlsruhe
Year: 2015
Subjects: Plasmonics
Surface Plasmon Polariton
Electron Energy Loss Spectroscopy
Transmission Electron Microscopy

description: Surface plasmon polaritons supported by the walls of rectangular slits in a thin Au film hybridize with resonant cavity modes in the slits. The coupling of the hybridized surface plasmon polariton cavity modes in slit arrays with respect to varying the slit size, inter-slit distance and number of slits was analyzed by electron energy loss spectroscopy in a transmission electron microscope. Strong next-neighbor coupling as well as mode splitting dependent on the inter-slit distance was observed.
title: UCN Perspektiv, Nr. 9 (2021): Teknologi
title: Teknologi
titleType: AlternativeTitle
Creators: name: UCN Perspektiv
Publisher: name: UCN Perspektiv
Year: 2021

description: Denne udgave af UCN Perspektiv indeholder en række af artikler forfattet af medarbejdere, der har arbejdet med udgangspunkt i det forskningsfokus, der blev formuleret for UCN’s teknologiuddannelser i 2017.
description: Forord 2...7-8 Forord 1...4-6 Skal vi lære i byggeprojekterne, skal vi starte med tillid!...83-91 XR-granskning af installationer...45-57 Skridttæller til kørestolsbruger...18-29 Forankring af viden via praktik...68-74 Fremstillingen af samarbejde i byggeriet...75-82 Optimering af produktion...9-17 Internet of Things i Sundhedsbrug...37-44 I4.0 på Datamatikeruddannelsen...58-67 Holdninger til træbyggeri...92-100 Digitale medier iagttaget...30-36 Teknologisk understøttede beslutninger...101-107
Abrikosov vortex escape from a columnar defect as a topological electronic transition in vortex core
Creators: name: Mel'nikov, A. S.
name: Samokhvalov, A. V.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We study microscopic scenario of vortex escape from a columnar defect under the influence of a transport current. For defect radii smaller than the superconducting coherence length the depinning process is shown to be a consequence of two subsequent topological electronic transitions in a trapped vortex core. The first transition at a critical current $j_L$ is associated with the opening of Fermi surface segments corresponding to the creation of a vortex--antivortex pair bound to the defect. The second transition at a certain current $j_d > j_L$ is caused by merging of different Fermi surface segments, which accompanies the formation of a freely moving vortex.
description: 5 pages, 4 figures
title: Die VÖB lohnt sich – persönlich und institutionell
title: Statement
titleType: Subtitle
Creators: name: Seissl, Maria
Publisher: name: Universität Graz
Year: 2021

description: 75 Jahre VÖB. 1946–2021, Hg. v. Alker-Windbichler, Bauer und Köstner-Pemsel, 2021, S. 43–46
Entangled Qubits in a non-Gaussian Quantum State
Creators: name: Kiesel, T.
name: Vogel, W.
name: Hage, B.
name: Schnabel, R.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We experimentally generate and tomographically characterize a mixed, genuinely non-Gaussian bipartite continuous-variable entangled state. By testing entanglement in 2$\times$2-dimensional two-qubit subspaces, entangled qubits are localized within the density matrix, which, firstly, proves the distillability of the state and, secondly, is useful to estimate the efficiency and test the applicability of distillation protocols. In our example, the entangled qubits are arranged in the density matrix in an asymmetric way, i.e. entanglement is found between diverse qubits composed of different photon number states, although the entangled state is symmetric under exchanging the modes.
description: 4 pages, 4 figures, published version
Symmetries of multifractal spectra and field theories of Anderson localization
Creators: name: Gruzberg, I. A.
name: Ludwig, A. W. W.
name: Mirlin, A. D.
name: Zirnbauer, M. R.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We uncover field-theoretic underpinnings of symmetry relations for multifractal spectra at Anderson transitions and at critical points of other disordered systems. We show that such relations follow from the conformal invariance of the critical theory, which implies their general character. We also demonstrate that for the Anderson localization problem the entire probability distribution for the local density of states possesses a symmetry arising from the invariance of correlation functions of the underlying non-linear $σ$-model with respect to the Weyl group of the target space of the model.
description: Published version
Spin systems dynamics and faults detection in threshold networks
Creators: name: Kirkland, Steve
name: Severini, Simone
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Physics (quant-ph)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Discrete Mathematics (cs.DM)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: We consider an agent on a fixed but arbitrary node of a known threshold network, with the task of detecting an unknown missing link/node. We obtain analytic formulas for the probability of success, when the agent's tool is the free evolution of a single excitation on an XX spin system paired with the network. We completely characterize the parameters allowing for an advantageous solution. From the results emerges an optimal (deterministic) algorithm for quantum search, therefore gaining a quadratic speed-up with respect to the optimal classical analogue, and in line with well-known results in quantum computation. When attempting to detect a faulty node, the chosen setting appears to be very fragile and the probability of success too small to be of any direct use.
description: 6 pages
Josephson effect through an anisotropic magnetic molecule
Creators: name: Sadovskyy, I. A.
name: Chevallier, D.
name: Jonckheere, T.
name: Lee, M.
name: Kawabata, S.
name: Martin, T.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study the Josephson effect through a magnetic molecule with anisotropic properties. Performing calculations in the tunneling regime, we show that the exchange coupling between the electron spin on the molecule and the molecular spin can trigger a transition from the $π$ state to the 0 state, and we study how the spin anisotropy affects this transition. We show that the behavior of the critical current as a function of an external magnetic field can give access to valuable information about the spin anisotropy of the molecule.
สถาปัตยกรรมพื้นถิ่นย่านเมืองเก่ากำแพงเพชร กรณีศึกษาถนนเทศา และถนนราชดำเนิน จังหวัดกำแพงเพชร
Creators: name: พัชรีรัต หารไชย
Publisher: name: คณะสถาปัตยกรรมศาสตร์
Year: 2024
Subjects: เรือนแถวพื้นถิ่น
เมืองเก่ากำแพงเพชร
รูปแบบสถาปัตยกรรม
วัสดุก่อสร้าง

description: วารสาร สิ่งแวดล้อมสรรค์สร้างวินิจฉัย (Built Environment Inquiry BEI), 23, 3, 1-19
title: Erinnerungen an VÖB-Aktivitäten in den 1970er bis 1990er Jahren - Statement
Creators: name: Sestits, Elisabeth
Publisher: name: Universität Graz
Year: 2021

description: 75 Jahre VÖB. 1946–2021, Hg. v. Alker-Windbichler, Bauer und Köstner-Pemsel, 2021, S. 47–48
Two-step Darboux transformations and exceptional Laguerre polynomials
Creators: name: Gomez-Ullate, David
name: Kamran, Niky
name: Milson, Robert
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mathematical Physics (math-ph)
subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 33C45, 33C47

description: It has been recently discovered that exceptional families of Sturm-Liouville orthogonal polynomials exist, that generalize in some sense the classical polynomials of Hermite, Laguerre and Jacobi. In this paper we show how new families of exceptional orthogonal polynomials can be constructed by means of multiple-step algebraic Darboux transformations. The construction is illustrated with an example of a 2-step Darboux transformation of the classical Laguerre polynomials, which gives rise to a new orthogonal polynomial system indexed by two integer parameters. For particular values of these parameters, the classical Laguerre and the type II $X_\ell$-Laguerre polynomials are recovered.
description: corrected minor mistakes
Callisto, un démonstrateur JupyterLab pour les sciences humaines et sociales
Creators: name: POUYLLAU, Stéphane
name: BUNEL, Mélanie
name: SAURET, Nicolas
Publisher: name: Zenodo
Year: 2021
Subjects: Jupyter
JupyterLab
SHS
JupyterHub
Huma-Num
Oauth2
API
GitLab
Notebooks
Carnets

description: Le démonstrateur Callisto, du nom de l’une des lunes de Jupiter, est une preuve de concept proposant la mise en œuvre du logiciel en ligne Jupyter et plus particulièrement sa version JupyterLab pour des pratiques de recherche en SHS et en lien avec l’écosystème de la TGIR Huma-Num.
Big Science and the Large Hadron Collider
Creators: name: Giudice, Gian Francesco
Publisher: name: arXiv
Year: 2011
Subjects: subject: History and Philosophy of Physics (physics.hist-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The Large Hadron Collider (LHC), the particle accelerator operating at CERN, is probably the most complex and ambitious scientific project ever accomplished by humanity. The sheer size of the enterprise, in terms of financial and human resources, naturally raises the question whether society should support such costly basic-research programs. I address this question here by first reviewing the process that led to the emergence of Big Science and the role of large projects in the development of science and technology. I then compare the methodologies of Small and Big Science, emphasizing their mutual linkage. Finally, after examining the cost of Big Science projects, I highlight several general aspects of their beneficial implications for society.
description: 17 pages; final version to appear in Physics in Perspective
แนวทางการอนุรักษ์ฟื้นฟูและพัฒนาย่านการค้าเมืองเก่านครราชสีมา เป็นแหล่งท่องเที่ยวทางประวัติศาสตร์
Creators: name: การุณย์ ศุภมิตรโยธิน
Publisher: name: คณะสถาปัตยกรรมศาสตร์
Year: 2024
Subjects: การอนุรักษ์
การฟื้นฟู
ย่านการค้าเมืองเก่านครราชสีมา
การท่องเที่ยวเชิงประวัติศาสตร์

description: วารสาร สิ่งแวดล้อมสรรค์สร้างวินิจฉัย (Built Environment Inquiry BEI), 23, 3, 20-38
การจัดหมวดหมู่ประเภทตราสินค้าสำหรับวิสาหกิจขนาดกลางและขนาดย่อมไทย
Creators: name: กอบกิจ จำจด
Publisher: name: คณะสถาปัตยกรรมศาสตร์
Year: 2024
Subjects: ประเภทตราสินค้า
การจัดหมวดหมู่ตราสินค้า
อัตลักษณ์ตราสินค้า
วิสาหกิจขนาดกลางและขนาดย่อม
เอสเอ็มอีไทย

description: วารสาร สิ่งแวดล้อมสรรค์สร้างวินิจฉัย (Built Environment Inquiry BEI), 23, 3, 39-57
Angular Momentum Evolution in Dark Matter Halos
Creators: name: Book, Laura G.
name: Brooks, Alyson
name: Peter, Annika H. G.
name: Benson, Andrew J.
name: Governato, Fabio
Publisher: name: arXiv
Year: 2010
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We have analyzed high resolution N-body simulations of dark matter halos, focusing specifically on the evolution of angular momentum. We find that not only is individual particle angular momentum not conserved, but the angular momentum of radial shells also varies over the age of the Universe by up to factors of a few. We find that torques from external structure are the most likely cause for this distribution shift. Since the model of adiabatic contraction that is often applied to model the effects of galaxy evolution on the dark-matter density profile in a halo assumes angular momentum conservation, this variation implies that there is a fundamental limit on the possible accuracy of the adiabatic contraction model in modeling the response of DM halos to the growth of galaxies.
description: 16 pages, 9 figures, accepted for publication in MNRAS
Social safety net programmes, repeated weather shocks, and household resilience to food insecurity in Malawi
Creators: name: Gondwe, Anderson
name: Nankwenya, Bonface
name: Chiwaula, Levison
name: Goeb, Joseph
Publisher: name: Unknown
Year: 2023
Subjects: subject: Agricultural and Food Policy
subject: Environmental Economics and Policy
subject: Food Security and Poverty
subject: International Development
subject: Resilience
subject: Safety nets
subject: Climate change
subject: Food security
subject: Cash transfer
subject: Malawi

description: Extreme weather shocks manifested through the late onset of rains, prolonged dry spells, droughts, and floods have increased in frequency and intensity over the past five decades in Malawi. The study utilizes four waves of Integrated Household Panel Survey data (2010, 2013, 2016, and 2019) to understand the impacts of economic shocks and social safety net programmes on food security status and household resilience in Malawi. Overall, households’ food security and resilience have improved between 2010 and 2019. Shocks including unusually high costs of food and agricultural inputs, floods, and irregular rains have a negative impact on resilience. Results further show that cash transfers, improvements in education, engagement in self-employment activities, and access to savings have a positive impact on resilience and food security status suggesting the potential of these factors to cushion against adverse economic shocks and crises.
Prym varieties of spectral covers
Creators: name: Hausel, Tamás
name: Pauly, Christian
Publisher: name: arXiv
Year: 2010
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics

description: Given a possibly reducible and non-reduced spectral cover X over a smooth projective complex curve C we determine the group of connected components of the Prym variety Prym(X/C). As an immediate application we show that the finite group of n-torsion points of the Jacobian of C acts trivially on the cohomology of the twisted SL_n-Higgs moduli space up to the degree which is predicted by topological mirror symmetry. In particular this yields a new proof of a result of Harder--Narasimhan, showing that this finite group acts trivially on the cohomology of the twisted SL_n stable bundle moduli space.
description: 22 pages, applications to topological mirror symmetry and a result of Harder--Narasimhan are added
Analyse und Simulation parasitärer Effekte in flüssig prozessierten organischen Transistoren
Creators: name: Hengen, Stefan
Publisher: name: Karlsruhe
Year: 2015
Subjects: Organische Elektronik
organic electronics
Transistor
OTFT

description: Ein SPICE Modell für organische Transistoren wird implementiert und um parasitäre Effekte (Gate-Leckströme, Prozessschwankungen, Kontaktwiderstände und Temperatureffekte) erweitert. Ebenfalls wird der Einfluss von Schichtdickenvariation von Halbleiter und Dielektrikum auf das Transistorverhalten untersucht. Die Qualität der optimierten Simulation wird am Beispiel eines Ringoszillators bei Temperaturen zwischen 15°C und 75°C demonstriert.
Feedback stabilization of pure states in quantum transport
Creators: name: Pöltl, Christina
name: Emary, Clive
name: Brandes, Tobias
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We propose a feedback control scheme for generating and stabilizing pure states of transport devices, such as charge qubits, under non-equilibrium conditions. The purification of the device state is conditioned on single electron jumps and leaves a clear signal in the full counting statistics which can be used to optimize control parameters. As an example of our control scheme, we are presenting the stabilization pure transport states in a double quantum dot setup with the inclusion of phonon dephasing.
description: 7 pages, 5 figures
What Sets the Sizes of the Faintest Galaxies?
Creators: name: Brasseur, Crystal M.
name: Martin, Nicolas F.
name: Macciò, Andrea V.
name: Rix, Hans-Walter
name: Kang, Xi
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We provide a comprehensive description and offer an explanation for the sizes of the faintest known galaxies in the universe, the dwarf spheroidal (dSph) satellites of the Milky Way and Andromeda. After compiling a consistent data set of half-light radii (r_{1/2}) and luminosities, we describe the size-luminosity relation of dSphs by a log-normal distribution in r_{1/2} with a mean size that varies as a function of luminosity. Accounting for modest number statistics, measurement uncertainties and surface brightness limitations, we find that the size-luminosity relations of the Milky Way and Andromeda dSph populations are statistically indistinguishable, and also very similar: their mean sizes at a given stellar luminosity differ by no more than 30%. In addition, we find that the mean size, slope and scatter of this log-normal size description of Local Group dSphs matches onto the relation of more massive low-concentration galaxies. This suggests that the stellar sizes of dSphs are ultimately related to their overall initial baryonic angular momentum. To test this hypothesis we perform a series of high resolution N-body simulations that we couple with a semi-analytic model of galaxy formation. These predict the same mean size and slope as observed in dSph satellites. At the same time, these models predict that the size-luminosity distributions for satellite galaxies around similar host-halos must be similar providing a natural explanation as to why the size distributions of Milky Way and Andromeda satellites are similar. Although strong rotation is currently not observed in dSphs, this may well be consistent with our angular-momentum-based explanation for their sizes if the disks of these galaxies have become sufficiently stirred through tidal interaction.
description: 12 pages, 5 figures, v.3 accepted for publication in ApJ, only minor changes
Genetische, parasitologische und konditionelle Charakterisierungen von Europäischen Feldhasen (Lepus europaeus PALLAS 1778) vom deutschen Festland und den Inseln Föhr und Pellworm
Creators: name: Kartes, Liane Nadine
Publisher: name: Karlsruhe
Year: 2015
Subjects: Lepus europaeus
Parasite Release
Wettrüsten
Festland
Inseln

description: Mit meiner Arbeit gelang ein Einblick in populationsgenetische Strukturen und die Parasitozönose des Europäischen Feldhasen in Deutschland. Auf der Insel Föhr konnte ich das Phänomen des "Parasite Release" nachweisen. Außerdem konnte ich ein Wettrüsten zwischen Wirten und Parasiten in einigen Populationen belegen.
Implications of Fermi Observations for Hadronic Models of Radio Halos in Clusters of Galaxies
Creators: name: Jeltema, Tesla E.
name: Profumo, Stefano
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We analyze the impact of the Fermi non-detection of gamma-ray emission from clusters of galaxies on hadronic models for the origin of cluster radio halos. In hadronic models, the inelastic proton-proton collisions responsible for the production of the electron-positron population fueling the observed synchrotron radio emission yield a gamma-ray flux, from the decay of neutral pions, whose spectrum and normalization depend on the observed radio emissivity and on the cluster magnetic field. We thus infer lower limits on the average cluster magnetic field in hadronic models from the Fermi gamma-ray limits. We also calculate the corresponding maximal energy density in cosmic rays and the minimal-guaranteed gamma-ray flux from hadronic radio-halo models. We find that the observationally most interesting cases correspond to clusters with large radio emissivities featuring soft spectra. Estimates of the central magnetic field values for those clusters are larger than, or close, to the largest magnetic field values inferred from Faraday rotation measures of clusters, placing tension on the hadronic origin of radio halos. In most cases, however, we find that the Fermi data do not per se rule out hadronic models for cluster radio halos as the expected gamma-ray flux can be pushed below the Fermi sensitivity for asymptotically large magnetic fields. We also find that cosmic rays do not contribute significantly to the cluster energy budget for nearby radio halo clusters.
description: 20 pages, 1 figure, accepted to ApJ, revised to match accepted version
The impact of tropical convection on the dynamics and predictability of midlatitude Rossby waves : a climatological study
Creators: name: Quinting, Julian Francesco Daniel
Publisher: name: Karlsruhe
Year: 2015
Subjects: Rossby wave
tropical cyclone
climatology
Madden-Julian Oscillation

description: An improved representation of tropical-extratropical interactions would help to better predict weather on the medium-range to seasonal timescale. This requires to understand the physical mechanisms of the main processes and to identify systematic model errors. Focusing on these two aspects, this study investigates the interactions between two tropical weather systems and the midlatitudes in reanalyses and reforecasts from a climatological perspective.
Chopped random-basis quantum optimization
Creators: name: Caneva, Tommaso
name: Calarco, Tommaso
name: Montangero, Simone
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In this work we describe in detail the "Chopped RAndom Basis" (CRAB) optimal control technique recently introduced to optimize t-DMRG simulations [arXiv:1003.3750]. Here we study the efficiency of this control technique in optimizing different quantum processes and we show that in the considered cases we obtain results equivalent to those obtained via different optimal control methods while using less resources. We propose the CRAB optimization as a general and versatile optimal control technique.
description: 9 pages, 10 figures
Weighted aggregation in the domain of crowd-based road condition monitoring
Creators: name: Laubis, Kevin
name: Simko, Viliam
name: Weinhardt, Christof
Publisher: name: Karlsruhe
Year: 2016
Subjects: Crowd-based sensing
road condition monitoring
international roughness index
predictive road maintenance
weighted aggregation
ensemble learning

description: This paper focuses on crowd-based road condition monitoring using smart devices, such as smartphones and evaluates different strategies for aggregating multiple measurements (arithmetic mean and weighted means using R2 and RMSE) for predicting the longitudinal road roughness. The results confirm that aggregating predictions from single drives leads to a higher model performance. This has been expected and confirms the intuition. The overall R2 could be increased from 0.69 to 0.75 on average and the NRMSE could be decreased from 9% to 8% on average. However, contrary to the intuition, the results show that weighted aggregations of single predictions should be avoided, which is consistent with previous findings in other domains, such as financial forecasting.