cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: Conceptualizing Community-based Environmental Peacebuilding in Cesar, Colombia
Creators: name: Hachmann, Samyra
name: Löhr, Katharina
name: Morales-Muñoz, Héctor
name: Eufemia, Luca
name: Sieber, Stefan
name: Bonatti, Michelle
Publisher: name: Humboldt-Universität zu Berlin
Year: 2023
Subjects: subject: Community-based natural resource management
subject: Conflict
subject: Cooperation
subject: Environmental peacebuilding
subject: Framework
subject: Social-ecological systems
subject: Cesar
subject: Colombia
subject: 300 Sozialwissenschaften

description: In conflict studies, environmental peacebuilding (EPB) has become an established concept to explain how environmental cooperation among opposing parties provides a platform for peacebuilding. EPB literature has been shaped predominantly by political science perspectives, initially with a focus on interstate conflicts, and ecological dynamics have received little attention to date. Building on the Social-Ecological Systems Framework (SESF), we develop a framework for community-based EPB and test it in post-conflict settings in the department of Cesar, Colombia. We use a qualitative mixed-methods approach, with 26 semi-structured interviews, six focus group discussions, and a World Café session with 30 participants. Our findings show that in six cases communities self-organize to access, conserve, and defend water and land resources while striving to achieve recognition of their civic rights by state actors. A central outcome of cooperation within and among communities is the (re)construction of collective and territorial identities and increased social cohesion. However, community-based EPB does not contribute to improving relations between communities and the private sector or the state, thus failing to strengthen actor relationships that are essential for Colombian peacebuilding. Despite limitations of this exploratory analysis, our approach proves fruitful for integrating ecological aspects in the understanding of EPB. To further develop the EPB concept, future research should look to other disciplines to diversify the understanding of key terms like resource value, cooperation, and peace.
Quenching timescales of dwarf satellites around Milky Way-mass hosts
Creators: name: Akins, Hollis B.
name: Christensen, Charlotte R.
name: Brooks, Alyson M.
name: Munshi, Ferah
name: Applebaum, Elaad
name: Engelhardt, Anna
name: Chamberland, Lucas
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Observations of the low-mass satellites in the Local Group have shown high fractions of gas-poor, quiescent galaxies relative to isolated dwarfs, implying that the host halo environment plays an important role in the quenching of dwarf galaxies. In this work, we present measurements of the quenched fractions and quenching timescales of dwarf satellite galaxies in the DC Justice League suite of 4 high-resolution cosmological zoom-in simulations of Milky Way-mass halos. We show that these simulations accurately reproduce the satellite luminosity functions of observed nearby galaxies, as well as the variation in satellite quenched fractions from $M_* \sim 10^5$ solar masses to $10^{10}$ solar masses. We then trace the histories of satellite galaxies back to $z \sim 15$, and find that many satellites with $M_* \sim 10^{6-8}$ solar masses quench within 2 Gyr of infall into the host halo, while others in the same mass range remain star-forming for as long as 5 Gyr. We show that this scatter can be explained by the satellite's gas mass and the ram pressure it feels at infall. Finally, we identify a characteristic stellar mass scale of $10^8$ solar masses above which infalling satellites are largely resistant to rapid environmental quenching.
description: 16 pages, 7 figures, accepted to ApJ
title: Studying the possibility of switching to electric taxis in Vienna for a small taxi company with five cars from technological, economic and environmental points of view
Creators: name: Atanassov, Atanas
Publisher: name: TU Wien
Year: 2015
Subjects: subject: Electro Taxis
subject: Vienna
subject: Feasibility

description: My job as a taxi driver in Vienna is the main motivation for choosing this topic for the master thesis. Working for a small taxi company with 5 taxis made me curious to study the possibility of switching to electric cars from technological, economic and environmental point of view. In the last few years the number of hybrid taxis in Vienna has significantly increased and they are quite well accepted by the customers. Today with the new improved technologies and batteries the electric cars used as taxis in the cities are more and more in discussion. There are a lot of projects regarding the use of electric vehicles in the taxi industry. Vienna is not an exception either. Some electric taxis already run on the streets of Vienna. The core objective of this work is to analyze the possibility of switching to electric taxis for a small taxi company in Vienna with 5 cars. The analyzes will include technological overview, ecological evaluation - lifecycle assessment, economic calculations and also taxi drivers interviews for their readiness to switch to electric cars and information about their driving behavior. This work should show the possibility to switch to electric vehicles and the advantages for all the parties - taxi companies, drivers, customers and not least environment. As transport is one of the major air pollutants, switching to electric taxis could contribute to CO2-emissions reduction and meeting the EU targets regarding GHG emissions.
title: Acculturation and consumer behaviour: a study of British Indians
Creators: name: Vijaygopal, Rohini
Publisher: name: The Open University
Year: 2010

description: The phenomenon of acculturation and its impact on consumer behaviour in the UK merits greater scrutiny. With a changing national demographic landscape as the backdrop, this research seeks to investigate whether established theories of acculturation are applicable to British Indians and what impact this acculturation has on their consumer behaviour. The first aim of the research is to examine whether British Indians can be classified according to the acculturation framework devised by Berry (1980). The second involves questioning whether membership of these acculturation categories has a bearing on British Indians' consumer behaviour, as indicated by their brand preferences for a range of host and ethnic products and services. The third aim of the research is to examine the relationship between demographic factors and acculturation categories.

Using a literature review as the basis, the research uses a preliminary qualitative phase to develop and refine a final questionnaire which is then applied in a quantitative large-scale survey. The data collected from the survey are analysed using a range of statistical techniques including cluster analysis, CHAID, correlation analyses and ANOVA.

The results show that Berry's (1980) acculturation categories apply to British Indians, who follow similar patterns of acculturation to those observed elsewhere in the world amongst minority immigrant populations. These acculturation categories are shown to be the primary differentiators of brand preference amongst British Indians. The acculturation categories also have distinctive demographic profiles, adding to what is known about individuals within them.

The research contributes towards the study of consumer acculturation in the UK and has significant implications for academicians and practitioners.
Il contributo dell'Ecu alla stabilità dei cambi: un ulteriore commento
Creators: name: FORNARI, F.
Publisher: name: Moneta e Credito
Year: 2013
Subjects: subject: ECU, exchange rate stability
subject: F15, F36, E42

description: Following recent articles by Jager and de Jong on the one hand, and Sarcinelli on the other, the present work offers additional analysis on the topic of the ECU and exchange-rate stability. The author shows that the effect of the ECU on exchange-rate stability mainly depends on the presence of arbitrage activity, i.e. the flows of national currencies which the ECU market gives rise to in order to counterbalance an excess demand for Ecus on the Euromarket. When arbitrage is introduced into the analysis, the relationship between the dollar and mark and pound gets worse (so creating instability) whereas the contribution of the ECU to European currencies’ stability remains positive, though reduced. JEL Codes: F15, F36, E42
description: Moneta e Credito, V. 42, N. 168 (1989)
Systematic Studies of the Centrality and sqrt(s_NN) Dependence of dE_T/deta and dN_ch/deta in Heavy Ion Collisions at Mid-rapidity
Creators: name: PHENIX Collaboration
name: Adler, S. S.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The PHENIX experiment at RHIC has measured transverse energy and charged particle multiplicity at mid-rapidity in Au+Au collisions at sqrt(s_NN) = 19.6, 130 and 200 GeV as a function of centrality. The presented results are compared to measurements from other RHIC experiments, and experiments at lower energies. The sqrt(s_NN) dependence of dE_T/deta and dN_ch/deta per pair of participants is consistent with logarithmic scaling for the most central events. The centrality dependence of dE_T/deta and dN_ch/deta is similar at all measured incident energies. At RHIC energies the ratio of transverse energy per charged particle was found independent of centrality and growing slowly with sqrt(s_NN). A survey of comparisons between the data and available theoretical models is also presented.
description: 327 authors, 25 pages text, 19 figures, 17 tables, RevTeX 4. To be submitted to Physical Review C as a regular article. Plain text data tables for the points plotted in figures for this and previous PHENIX publications are (or will be) publicly available at http://www.phenix.bnl.gov/papers.html
Decentralized Optimal Coordination of Connected and Automated Vehicles for Multiple Traffic Scenarios
Creators: name: Mahbub, A M Ishtiaque
name: Malikopoulos, Andreas A.
name: Zhao, Liuhui
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics

description: Connected and automated vehicles (CAVs) provide the most intriguing opportunity to optimize energy consumption and travel time. Several approaches have been proposed in the literature that allow CAVs to coordinate in situations where there is a potential conflict, for example, in signalized intersections, merging at roadways and roundabouts, to reduce energy consumption and optimize traffic flow. In this paper, we consider the problem of coordinating CAVs in a corridor consisting of multiple traffic scenarios. We formulate a two-level optimization problem in which we maximize traffic throughput in the upper-level problem, and derive a closed-form analytical solution that yields the optimal control input for each CAV, in terms of fuel consumption, in the low-level problem. We validate the effectiveness of the solution through simulation under 100% CAVpenetration rate. Fuel consumption and travel time for the vehicles are significantly reduced compared to a baseline scenario consisting of human-driven vehicles.
description: arXiv admin note: text overlap with arXiv:1909.10106
title: Pneumatic hybrid structure : a prototypical, quick deployable, temporary event structure
Creators: name: Kirsten, Clive Edward
Publisher: name: TU Wien
Year: 2015
Subjects: subject: inflatable structures
subject: pneumatic structures
subject: membranes
subject: prototyp
subject: bending-active components

description: Inflatable structures are used as quick deployable structures for many different commercial and military purposes. The advantage of small packing volumes and quick installation are extremely attractive to the event industry, internationally. The commercial agenda driving the industry demands flexibility, mobility, short installations and reduced deployment costs. There are inflatable solutions currently deployed and working within the industry. Safety of the structures are the most questionable with many products claiming resistance to high wind speed pressure. Most not supported by structural engineering documentation and most even without proper testing been undertaken. The point of failure in pneumatic structures follows the development of compression zones in the membrane that eventually leads to collapse. This translates quickly to buckling deformation due to external load application. Most solutions simply increase internal pressure to achieve a stiffer inflated structure. And this leads to practical complications and costs that are not sustainable in a commercial environment. This thesis begins the exploration of a solution that will comply with UK event industry safety standards that are prescribed under publication. The deployment of a bending active element integrated and working with the pneumatic structure is proposed as a hybrid solution. The aim is to achieve greater advantages than the standard inflatable approach currently offers.
Ratio of the proton electromagnetic form factors from meson dressing
Creators: name: Kondratyuk, S.
name: Kubodera, K.
name: Myhrer, F.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The Dressed K-matrix Model, developed previously for low- and intermediate-energy Compton scattering, is generalized to calculate the photon-nucleon vertex with a virtual photon and an off-shell nucleon. Using this model, the ratio of the proton electromagnetic form factors is computed. The calculated ratio is in excellent agreement with the ratio measured in polarized electron-proton scattering.
description: 8 pages, 3 figures, RevTeX4; title modified, electric form factor shown, results unchanged; to be published in Phys. Rev. C
The impact of protected areas on local livelihoods in the South Caucasus
Creators: name: Schott, Johanna
name: Kalatas, Talin
name: Nercissians, Emilia
name: Barkmann, Jan
name: Shelia, Vakhtang
name: Schott, Johanna
name: Kalatas, Talin
name: Nercissians, Emilia
name: Barkmann, Jan
name: Shelia, Vakhtang
Publisher: name: Unknown
Year: 2016
Subjects: subject: Community/Rural/Urban Development
subject: Environmental Economics and Policy
subject: Land Economics/Use
subject: Resource /Energy Economics and Policy
subject: Transcaucasia
subject: nature conservation
subject: qualitative research
subject: protected areas
subject: rural livelihoods
subject: Südkaukasus
subject: Naturschutz
subject: qualitative Forschung
subject: Schutzgebiete
subject: ländlicher Lebensunterhalt

description: Nature conservation has a long tradition in the South Caucasus, a region with very high biodiversity. Alongside century old nature reserves (NR) in Azerbaijan and Georgia, two new transboundary national parks (NP) have recently been created in Armenia and Georgia. All of these protected areas exert an influence on the local populations, which use land located inside or in proximity to these areas. To investigate the impact of protected areas on the local populations, we conducted a qualitative study close to two neighbouring, historical NRs in Georgia (Lagodekhi) and Azerbaijan (Zaqatala), and close to the two new transboundary NPs in Armenia (Lake Arpi) and in Georgia (Javakheti). We collected the opinions of the local populations, local administrations, and environmental NGOs regarding the impact of protected areas on the livelihoods of the local populations and investigated whether the local populations developed strategies for dealing with these impacts. Results show that the land use restrictions entailed by protected areas cause conflicts of interests between the goals of conservation and those of the local populations on the one hand, and competition between different local groups with regard to scarce resources such as pastures on the other hand. These land use restrictions are due to the land use regulations of the protected areas and concern the use of pastures and forests. All sorts of tourism could provide a possible solution to settle conflicts and to increase incomes.
Site specificity of DSP-PP cleavage by BMP1
Creators: name: Yang, Robert T.
name: Glendale L. Lim
name: Yee, Colin T.
name: Fuller, Robert S.
name: Ritchie, Helena H.
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Biochemistry
subject: Microbiology
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Biotechnology
subject: Evolutionary Biology
subject: Cancer
subject: Hematology
subject: 110309 Infectious Diseases
subject: FOS: Health sciences
subject: Plant Biology
subject: Computational Biology

description: Bone morphogenic protein 1 (BMP1), a metalloproteinase, is known to cleave a wide variety of extracellular matrix proteins, suggesting that a consensus substrate cleavage amino acid sequence might exist. However, while such a consensus sequence has been proposed based on P4 to P4′ (i.e. the four amino acids flanking either side of the BMP1 cleavage site; P4P3P2P1|P1′P2′P3′P4′) sequence homologies between two BMP1 substrates, dentin matrix protein 1 and dentin sialoprotein phosphophoryn (DSP-PP) (i.e. xMQx|DDP), no direct testing has so far been attempted. Using an Sf9 cell expression system, we have been able to produce large amounts of uncleaved DSP-PP. Point mutations introduced into this recombinant DSP-PP were then tested for their effects on DSP–PP cleavage by either Sf9 endogenous tolloid-related protein 1 (TLR-1) or by its human homolog, BMP1. Here, we have measured DSP-PP cleavage efficiencies after modifications based on P4-P4′ sequence comparisons with dentin matrix protein 1, as well as for prolysyl oxidase and chordin, two other BMP1 substrates. Our results demonstrate that any mutations within or outside of the DSP-PP P4 to P4′ cleavage site can block, impair or accelerate DSP-PP cleavage, and suggest that its BMP1 cleavage site is highly conserved in order to regulate its cleavage efficiency, possibly with additional assistance from its conserved exosites. Thus, BMP1 cleavage cannot be based on a consensus substrate cleavage site.
title: Upscaling agroforestry in the tropics through actor-networks: a comparative case study of cacao farming systems in two regions of Colombia
Creators: name: Rodríguez, Tatiana
name: Bonatti, Michelle
name: Löhr, Katharina
name: Bravo, Aura
name: Del Río, Martha
name: Lana, Marcos
name: Sieber, Stefan
Publisher: name: Humboldt-Universität zu Berlin
Year: 2023
Subjects: subject: Sustainable agriculture
subject: Network analysis
subject: Governance
subject: Knowledge systems
subject: Complex systems
subject: 630 Landwirtschaft und verwandte Bereiche

description: Agroforestry systems (AFS) upscaling has the potential to integrate sustainability and resilience objectives into agriculture. However, this is a daunting task requiring multi-actor collaboration across public and private sectors at multiple governance levels, coupled with innovative approaches to jointly managing AFS knowledge. Understanding such multi-actor interactions from a network perspective may help to unravel how social structures, created by relational patterns enhance or hinder AFS upscaling. Our paper aims to comparatively explore the role of regional actor-networks on AFS upscaling for a selected farming system. By conducting semi-structured interviews, we collected information about the ties of 86 actors supporting cacao agroforestry systems (CAFS) across two regions of Colombia. We use social network analysis (SNA) to comparatively visualize and understand the general structure of these networks, find relational patterns between the diverse categories of actors involved, and identify a set of key players bridging the majority of the actors within these networks. We find highly centralized networks that connect multiple actors by a low number of mostly non-reciprocal ties. Within these networks, we identify a predominance of bridging ties over bonding ties, homophily patterns among research and education institutions, and heterophily configurations among farmer-based organizations. We also find that the composition of the sets of key actors and the platforms where they converge varies substantially from region to region due to decentralized agricultural policies and differing characteristics across regions. Our approach provides key entry points for promoting multi-actor coalitions that can effectively expand the benefits of AFS in tropical agricultural systems.
Unitary preparation of many body Chern insulators: Adiabatic bulk boundary correspondence
Creators: name: Bandyopadhyay, Souvik
name: Dutta, Amit
Publisher: name: arXiv
Year: 2020
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We approach the long-standing problem of preparing an out-of-equilibrium many-body Chern insulator (CI) and associated bulk-boundary correspondence unitarily. Herein, this is addressed by constructing a dynamical many-body Chern invariant exploiting the property of the bulk macroscopic electric polarisation (Resta polarisation) of the CI. This Chern invariant defined from observable correlations is also established to topologically classify many body Chern states in equilibrium. The non-equilibrium behavior of the invariant is probed by ramping the paradigmatic Haldane model of graphene from its trivial to the topological phase. We show that a non-linear ramp may work more efficiently in approaching the topological state, thereby establishing the existence of an optimal topological state preparation. Furthermore, to ensure the near adiabatic dynamics across the quantum critical point, we propose a novel counter-diabatic scheme. The topological nature of the prepared state is firmly established by observing an emerging $U(1)$ topological charge. We also compute the edge current in the time evolved state of the system under a semi-periodic boundary condition and clearly establish an adiabatic bulk-boundary correspondence which firmly ensconces the validity of the many-body invariant.
description: 17 Pages, 9 figures, title modified, changed figures and text, Appendices added
title: Wohnen wie bei Palladio? : Ein Vergleich der Architektur von palladianischen und neopalladianischen repräsentativen Wohnsitzen in England
Creators: name: Leitner, Stefanie
Publisher: name: TU Wien
Year: 2015
Subjects: subject: Architektur
subject: England
subject: 18.Jahrhundert
subject: Inigo Jones
subject: Andrea Palladio
subject: England
subject: Palladianism

description: Als Anfang des 17. Jahrhunderts Inigo Jones nach seinen beiden Italienreisen mit dem Queen's House den ersten palladianische Bau auf englischem Boden errichtete, begann eine neue Ära in der englischen Architekturgeschichte. Seine Bauten, die zum Großteil für die englische Königsfamilie entstanden, setzten sich klar von der zeitgenössischen Architektur ab und sollten die Architektur in England nachhaltig prägen. Nur der englische Bürgerkrieg konnte seiner Karriere aber auch dem Palladianismus in England ein rasches Ende bereiten. Nach der Restauration setzte sich das Königshaus klar von dieser Architektur ab und Christopher Wrens englischer Barock prägte fast ein halbes Jahrhundert die englische Architekturlandschaft. Erst mit dem Erscheinen des Vitruvius Brittanicus von Colen Campbell und der englischen Quattro Libri-Übersetzung durch Giacomo Leoni und Nicholas Dubois kommt es zu einer Rückbeziehung auf die Architektur von Inigo Jones und Andrea Palladio, wenn auch in einer anderen Form als in der Zeit vor dem Bürgerkrieg. Anhand einzelner ausgewählter Fallbeispiele werden diese Unterschiede in der palladianischen Architektur vor dem Bürgerkrieg und der neopalladianischen im 18. Jahrhundert analysiert, ausgewertet und in den politischen und kulturellen Kontext jener Zeit gestellt.
description: In the beginning of the 17th century Inigo Jones returned home after two journeys to Italy and started construction on the Queen's House, the first Palladian building in England. A new era of architectural history in England was born. His buildings which were mainly built for the royal family were different from contemporary constructions and had a great impact on English architecture. But with the beginning of the Civil War Jones- career and Palladianism came to an early end. After the restoration the royal family avoided Jones-architecture and Christopher Wren and his English Baroque shaped the world of architecture in England for almost 50 years. Only when Colen Campbell's Vitruvius Britannicus and Giacomo Leoni's and Nicholas Dubois-translation of the Quattro Libri by Palladio were published in 1715 architects started to refer to the architecture of Inigo Jones and Andrea Palladio. This time though the results were different than in the time before the Civil War. Those difference between Palladian architecture before the Civil War and Neopalladian architecture in the 18th century will be dissected, evaluated and put into the political and cultural context of that time by analyzing several buildings.
Eye mySelf
Creators: name: Yakimov, Christopher Doyle
Publisher: name: University of British Columbia
Year: 2011

description: Eye mySelf is a narrative inquiry into the word "self" A discursive object (Danziger, 2003; Cushman, 1990), "self" saturates the everyday language of reflexivity and remains a familiar feature of psychological literature and therapy. I have become familiar with it in my own life: I have a Bachelor's degree in Psychology; I have participated in a year of Counselling Psychology coursework and supervised training; and from the age of two or three I participated in a therapeutic community, a community to which I belonged for close to 20 years. I know myself. Or do I? Do I know my "self"? How it works? What it does, or might do? I am suspicious. I think my "self" might be getting away with something, and I want to explore this suspicion. As a narrative inquiry into my own remembered experience of "self," this thesis explores language via language, and rests on Jacques Derrida's (1991, 2000) thought about signs, signatures, and testimony, Judith Butler's (2004) thought about how we might be given over to each other, and Michel Foucault's (1990) thought about discourse, confession, and sexuality. It is organized as a collection of pensées (Leggo, 1990) - thoughts, explorations, imaginings, wandering wonderings about "self" - with the hope of generating a salient and palpable resonance between the pieces (Heraclitus, 1987), a resonance of possibility for how "self" might work, what it might do, how it does you and I, your "I" and my "I", (or is that "eye"?), and what that might come to do to us. In line with Butler's (2004) conceptions of the body as that which bears the human, I want to evoke how it might feel to bear, perhaps by baring, a "self." I mean to arouse suspicion for this baring, for this "self," and its place. To this end, I eye my "self."
Far-infrared and sub-mm observations of the Crab nebula
Creators: name: Green, D. A.
name: Tuffs, R. J.
name: Popescu, C. C.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present FIR and sub-mm images of the Crab nebula, taken with ISOPHOT on board ISO and with the SCUBA on the JCMT. The ISOPHOT observations were made at 60, 100, 170 micron, with FWHM of equivalent area Gaussian beams of 44, 47 and 93 arcsec, respectively. The 850 micron SCUBA image has a Gaussian FWHM of 17 arcsec. The 60 and 100 micron images show clear excess of emission above that expected from an extrapolation of the synchrotron spectrum of the Crab nebula from lower frequencies. The ISOPHOT images reveal that about half this excess is attributable to two peaks, separated by approximately 80 arcsec. We also present spectra taken using the LWS on board ISO, which show that the FIR excess is not due to line emission. The lower resolution 170 micron image does not show any excess emission. These findings are consistent with a picture in which the FIR excess is due to emission from a small amount of warm dust which radiates predominantly at 60 and 100 micron micron but not at 170 micron, and which is superimposed on a synchrotron spectrum which gradually steepens towards shorter wavelengths throughout the FIR and MIR spectral range. The dust geometry is consistent with a torus of diameter approximately 0.8 pc created by the supernova progenitor, superimposed upon a broadly distributed component which may be supernova condensates in the filaments. The dust-to-gas ratio in the filaments is comparable to the interstellar value. To study spectral index variations in the radio synchrotron emission we compared the 850-micron image with a 20-cm VLA image. These images are very similar, implying that there is little variation in spectral index across the face of the remnant between these wavelengths.
description: 13 pages, 10 figures, to appear in MNRAS
Microscopic evidence for the intra-unit-cell electronic nematicity inside the pseudogap phase in YBa$_2$Cu$_4$O$_8$
Creators: name: Wang, W.
name: Luo, J.
name: Wang, C. G.
name: Yang, J.
name: Kodama, Y.
name: Zhou, R.
name: Zheng, Guo-qing
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Understanding the nature of the mysterious pseudogap phenomenon is one of the most important issues associated with cuprate high-$T_c$ superconductors. Here, we report $^{17}$O nuclear magnetic resonance (NMR) studies on two planar oxygen sites in stoichiometric cuprate YBa$_2$Cu$_4$O$_8$ to investigate the symmetry breaking inside the pseudogap phase. We observe that the Knight shifts of the two oxygen sites are identical at high temperatures but different below $T_{\rm nem} \sim$ 185 K, which is close to the pseudogap temperature $T^{\ast}$. Our result provides a microscopic evidence for intra-unit-cell electronic nematicity. The difference in quadrupole resonance frequency between the two oxygen sites is unchanged below $T_{\rm nem}$, which suggests that the observed nematicity does not directly stem from the local charge density modulation. Furthermore, a short-range charge density wave (CDW) order is observed below $T \simeq$ 150 K. The additional broadening in the $^{17}$O-NMR spectra because of this CDW order is determined to be inequivalent for the two oxygen sites, which is similar to that observed in case of nematicity. These results suggest a possible connection between nematicity, CDW order, and pseudogap.
description: 14 pages, 5 figures
title: Lernwerkstatt - Volksschule Hallwang
Creators: name: Porenta, Ines
Publisher: name: TU Wien
Year: 2015
Subjects: subject: Volksschule
subject: Plus-Energie
subject: elementary school
subject: plus-energy

description: Die Idee dieser Arbeit ist, sich mit der Nachhaltigkeit eines Schulgebäudes in Salzburg zu befassen. Im Zentrum der Klimabündnis-Gemeinde Hallwang soll eine Volksschule entstehen. Bildungseinrichtungen sind ein wichtiges öffentliches Gut, welche zu Beginn der schulischen Laufbahn nicht nur Lernorte sind, sondern auch den Platz eines Spielraumes im Leben des Kindes einnehmen. Jedes Kind betrachtet seine Umwelt auf eine andere Art und Weise und dementsprechend lernen Kinder auch unterschiedlich. In den letzten Jahren fand in der Pädagogik ein Wandel statt; weniger Frontalunterricht mehr offenes und individuelles Lernen sind die Devise. Diese neuen Lernstrukturen benötigen neue Raumkompositionen. Die geplante Schule macht das Klassenzimmer zu einem Zentrum, welches sich zu einer Freiluftklasse und zu einem offenen Lernbereich hin öffnet und somit unterschiedliche Lernformen und -situationen zulässt. Lernen in unterschiedlichen Arbeitspositionen (sitzend, liegend oder kniend), spielen, toben, erforschen in der großzügig gestalteten Aula oder im Pausenhof und das Zurückziehen in Ecken und Nischen sind spezifische Funktionen, welche das neue Gebäude zulässt.
description: The following thesis is dealing with the sustainability of a school building in Salzburg. A elementary school building is to be developed in the center of Hallwang, part of the Climate Alliance Austria. Educational facilities are an important public good, which in the lives of our children do not only function as places for teaching and learning, but also as places for playing. Every child looks at his environment in another way and accordingly children also learn differently. During the last years a change took place in the educational theory; less frontal lessons more open and individual learning are the foreign exchange. These new learning structures need new space compositions. The planned school makes the classroom a centre which opens to an open-air class and to an open learning area and allow different learning forms and learning situations. Learning in different working positions (seated, recumbent or kneeling), play, rave, investigate in the generously formed assembly hall or in the break court and areas for retreat are the specific functions which admit the new building.
Electron backscattering from dynamical impurities in a Luttinger liquid
Creators: name: San-Jose, Pablo
name: Guinea, Francisco
name: Martin, Thierry
Publisher: name: arXiv
Year: 2004
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Electron backscattering in a Luttinger liquid with an impurity is investigated in the presence of zero point motion of the phonon lattice. The impurity can mean either a mass defect, an elastic defect or a pinning defect. The phonon spectrum is then affected by the presence of the defect, which enters in the renormalization group equations for backscattering. The RG equation becomes dependent on the energy cutoff for finite Debye frequency $ω_D$ giving rise to finite energy effects. We compute the local density of states and show how the renormalization group flow is affected by a finite $ω_D$.
description: 6 pages, 6 figures. Corrected references, did not compile
Il contributo dell'Ecu alla stabilità dei cambi: un'ulteriore replica
Creators: name: JAGER, H.
name: DE JONG, E.
Publisher: name: Moneta e Credito
Year: 2013
Subjects: subject: ECU, exchange rate stability
subject: F15, F36, E42

description: The work is a response to Fornari’s contribution to the discussion of the ECU’s potential effects on exchange-rate stability. In it the authors explain some aspects of their previous study, which in their view are misunderstood by Fornari. They then defend the role of arbitrage and coverage of exchange-rate risk by banks, a point of criticism for Fornari which occupies a prominent place in their article. JEL Codes: F15, F36, E42
description: Moneta e Credito, V. 42, N. 168 (1989)
Testing Quantum Gravity via Cosmogenic Neutrino Oscillations
Creators: name: Christian, Joy
Publisher: name: arXiv
Year: 2004
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Implications of some proposed theories of quantum gravity for neutrino flavor oscillations are explored within the context of modified dispersion relations of special relativity. In particular, approximate expressions for Planck-scale-induced deviations from the standard oscillation length are obtained as functions of neutrino mass, energy, and propagation distance. Grounding on these expressions, it is pointed out that, in general, even those deviations that are suppressed by the second power of the Planck energy may be observable for ultra-high-energy neutrinos, provided they originate at cosmological distances. In fact, for neutrinos in the highest energy range of EeV to ZeV, deviations that are suppressed by as much as the seventh power of the Planck energy may become observable. Accordingly, realistic possibilities of experimentally verifying these deviations by means of the next generation neutrino detectors--such as IceCube and ANITA--are investigated.
description: 8 pages, RevTeX4; Essentially the published version
Ageing of complex networks
Creators: name: Burda, Zdzislaw
name: Kotwica, Michalina
name: Malarz, Krzysztof
Publisher: name: arXiv
Year: 2020
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Many real-world complex networks arise as a result of a competition between growth and rewiring processes. Usually the initial part of the evolution is dominated by growth while the later one rather by rewiring. The initial growth allows the network to reach a certain size while rewiring to optimise its function and topology. As a model example we consider tree networks which first grow in a stochastic process of node attachment and then age in a stochastic process of local topology changes. The ageing is implemented as a Markov process that preserves the node-degree distribution. We quantify differences between the initial and aged network topologies and study the dynamics of the evolution. We implement two versions of the ageing dynamics. One is based on reshuffling of leaves and the other on reshuffling of branches. The latter one generates much faster ageing due to non-local nature of changes.
description: 14 pages, 15 figures
Medial lemniscal evoked responses in thalamic ethmoid neurons
Creators: name: Lee, Stephanie G.
Publisher: name: University of British Columbia
Year: 2011

description: This thesis describes electrophysiological and pharmacological properties of neurons in the ethmoid nucleus of the rat thalamus. According to the atlas by Paxinos and Watson, the ethmoid nucleus is located dorsal to the medial lemniscus, the major somatosensory input to the thalamus. The ethmoid also lies ventral to the parafascicular nucleus, caudal to the ventrobasal thalamus and rostral to the scaphoid nucleus. The ethmoid is considered a higher order nucleus, which implies that it serves as a link in corticothalamo- cortical pathways that process sensory information. The literature on this nucleus is scarce and this thesis represents the first known attempt to study these neurons. Hence, a major objective of this thesis was to determine the passive and active properties of ethmoid neurons. Recent evidence from this laboratory has shown that stimulation of the medial lemniscus produced glycinergic and GABAergic inhibition in ventrobasal neurons. This inhibition was not sensitive to ionotropic glutamate receptor antagonism by kynurenate. A prediction from these studies was that the ethmoid was an intermediate nucleus in a circuit between the medial lemniscus and neurons of the ventrobasal thalamus. Thus, a key aim of this thesis was to examine the possible involvement of ethmoid neurons in this novel circuit. This thesis provides evidence that ethmoid neurons have passive and active properties similar to other neurons of the dorsal thalamus. Ethmoid neurons have a mean resting membrane potential of ~ -53 mV, a mean input resistance of ~670 MΩ and a mean membrane time constant of ~64 ms. Ethmoid neurons also have the ability to generate spikes in the tonic and burst firing modes. The active properties were sensitive to blockade by internal application of QX-314, a quaternary blocker of Na⁺ channels and by extracellular application of Ni2 ⁺ , a Ca2 ⁺ channel antagonist. These observations are consistent with Na⁺ dependent action potentials when a neuron is in the tonic firing mode and low threshold Ca2 ⁺ spikes when in the burst firing mode. We showed that stimulation of the medial lemniscus evoked depolarizations in all recorded ethmoid neurons. We categorized the depolarization responses into two groups. Group I were monophasic depolarizations and group II were biphasic depolarizations. The medial lemniscal evoked depolarization of ethmoid neurons persisted in the presence of kynurenate. These observations are consistent with the participation of ethmoid neurons in a circuit that results in glycinergic inhibition in ventrobasal neurons. This thesis marks the first known attempt to study neurons of the ethmoid nucleus. The observations provide evidence for functional similarities of ethmoid neurons to other thalamic neurons, as well as evidence for novel inputs activated by stimulation of the medial lemniscus.
Un'autobiografia bibliografica
Creators: name: BOULDING, K.E.
Publisher: name: Moneta e Credito
Year: 2013
Subjects: subject: Kenneth Boulding, biography
subject: B31

description: The paper is a contribution to a series of recollections and reflections on the professional experiences of distinguished economists which the Banca Nazionale del Lavoro Quarterly Review started in 1979. In it, Kenneth E. Boulding recounts his life and career. JEL Codes: B31
description: Moneta e Credito, V. 43, N. 169 (1990)
La gestione del cambio nello SME con completa mobilità dei capitali
Creators: name: BINI SMAGHI, L.
name: MICOSSI, S.
Publisher: name: Moneta e Credito
Year: 2013
Subjects: subject: International trade and balance of payments
subject: F15

description: This paper discusses the EMS in a number of sections. Section 1 examines the potential effects of full capital mobility on the sovereignty of national policy making. Section 2 looks at the history of exchange rate management (ERM) within the system to date, and Section 3 considers the role of monetary policy within the ERM. Sections 4 and 5 discuss the future viability of the system in terms of recent changes. In conclusion (Section 6) it is noted that the pressures of short-term capital flows, given free capital, will entail a further loss of monetary autonomy for member countries. JEL Codes: F15
description: Moneta e Credito, V. 43, N. 169 (1990)
Filling random cycles
Creators: name: Manin, Fedor
Publisher: name: arXiv
Year: 2020
Subjects: subject: Metric Geometry (math.MG)
subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 49Q15, 60D05, 82B41 (60F05, 49Q05)

description: We compute the asymptotic behavior of the average-case filling volume for certain models of random Lipschitz cycles in the unit cube and sphere. For example, we estimate the minimal area of a Seifert surface for a model of random knots first studied by Millett. This is a generalization of the classical Ajtai--Komlós--Tusnády optimal matching theorem from combinatorial probability. The author hopes for applications to the topology of random links, random maps between spheres, and other models of random geometric objects.
description: 23 pages, 1 figure. Version 2 improves the exposition and fixes careless errors and sloppiness; no changes to (intended) mathematical content
Shadows and convexity of surfaces
Creators: name: Ghomi, Mohammad
Publisher: name: arXiv
Year: 2004
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 53A05, 53A04 (Primary), 52A15, 53C42 (Secondary)

description: We study the geometry and topology of immersed surfaces in Euclidean 3-space whose Gauss map satisfies a certain two-piece-property, and solve the ``shadow problem" formulated by H. Wente.
description: 13 pages, published version
Simulation Of Flow Past Two Side-By-Side Cylinders Using Compact Scheme Based Chimera Method
Creators: name: Saurabh, Shakti
name: Siddharth Dixit
name: Vajjala, Suman
Publisher: name: figshare
Year: 2020
Subjects: subject: 91504 Fluidisation and Fluid Mechanics
subject: FOS: Other engineering and technologies

description: The present study highlights the capability of a newly developed chimera grid methodolgy to analyze complex fluid flows. The developed chimera methodology incorporates high accuracy compact schemes on orthogonal body-fitted grids which guarantees Dispersion Relation Preservation and fourth-order Lagrange interpolation for minimization of interpolation error. Navier-Stokes equation formulated using streamfunction-vorticity variables is adopted for reasons of ac-curacy. Current analysis looks at a 2D incompressible flow past two-side-by-side cylinders at Reynolds number 100 and gap ratio 2.5. Computed results show excellent agreement with experiments and other computational results.
Using Deep Learning to Enhance Event Geometry Reconstruction for the Telescope Array Surface Detector
Creators: name: Ivanov, D.
name: Kalashev, O. E.
name: Kuznetsov, M. Yu.
name: Rubtsov, G. I.
name: Sako, T.
name: Tsunesada, Y.
name: Zhezher, Y. V.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The extremely low flux of ultra-high energy cosmic rays (UHECR) makes their direct observation by orbital experiments practically impossible. For this reason all current and planned UHECR experiments detect cosmic rays indirectly by observing the extensive air showers (EAS) initiated by cosmic ray particles in the atmosphere. The world largest statistics of the ultra-high energy EAS events is recorded by the networks of surface stations. In this paper we consider a novel approach for reconstruction of the arrival direction of the primary particle based on the deep convolutional neural network. The latter is using raw time-resolved signals of the set of the adjacent trigger stations as an input. The Telescope Array (TA) Surface Detector (SD) is an array of 507 stations, each containing two layers plastic scintillator with an area of $3$ m$^2$. The training of the model is performed with the Monte-Carlo dataset. It is shown that within the Monte-Carlo simulations, the new approach yields better resolution than the traditional reconstruction method based on the fitting of the EAS front. The details of the network architecture and its optimization for this particular task are discussed.
description: Accepted by Machine Learning: Science and Technology
title: Schwimmende Dörfer - eine interkulturelle Begegnung
Creators: name: Steininger, Phong
Publisher: name: TU Wien
Year: 2015
Subjects: subject: Tourismus
subject: Schwimmende Gebäude
subject: tourism
subject: swimming buildings

description: In einer bizarr geformten Landschaft, bestehend aus rund 2000 Inseln und Kalkfelsen im Golf von Ton King im Norden Vietnams - die Ha Long Bucht - leben mehr als tausend ehemalige Seenomaden - seit Generationen in einfachen Hütten auf schwimmenden Flössen. Mit dem rasanten Aufstieg des Tourismus und gleichzeitig aber einer rudimentären Infrastruktur wird zurzeit in Vietnam viel gebaut - so auch auf Inseln in der Ha Long Bucht. Und um Baufläche zu erschaffen, werden Felsen und Berge gerodet und abgetragen. Mein Projekt ist ein Versuch, mit der überlieferten Erfahrung einerseits und modernem Design, Wissenschaft und Technik andererseits Rahmenbedingungen und Infrastruktur für interkulturelle Begegnungen zu schaffen, zwischen Besucherinnen/Besuchern und Einheimischen - ohne der Naturlandschaft Wunden zuzufügen.
description: Since generations, more than 1000 former sea gypsies live in this very bizarre landscape in the North Vietnamese gulf of Ton King, consisting of 2000 islands and chalk cliffs. They inhabit simple huts on floating rafts. The recent rise of tourism in Vietnam and in particular on the islands of the Halong Bay has led to an increase in construction on one side with only a rudimentary infrastructure existing on the other side. In order to make land ready for development, cliffs and mountains are cleared and even partially removed. The project of this Master thesis envisages to combine both traditional experience as well as contemporary design, science and technics to create the frame conditions and the infrastructure for intercultural gatherings between visitors and natives - and to inflict the least necessary wound upon the existing landscape.