cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Aharonov-Bohm effect and broken valley-degeneracy in graphene rings
Creators: name: Recher, P.
name: Trauzettel, B.
name: Rycerz, A.
name: Blanter, Ya. M.
name: Beenakker, C. W. J.
name: Morpurgo, A. F.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We analyze theoretically the electronic properties of Aharonov-Bohm rings made of graphene. We show that the combined effect of the ring confinement and applied magnetic flux offers a controllable way to lift the orbital degeneracy originating from the two valleys, even in the absence of intervalley scattering. The phenomenon has observable consequences on the persistent current circulating around the closed graphene ring, as well as on the ring conductance. We explicitly confirm this prediction analytically for a circular ring with a smooth boundary modelled by a space-dependent mass term in the Dirac equation. This model describes rings with zero or weak intervalley scattering so that the valley isospin is a good quantum number. The tunable breaking of the valley degeneracy by the flux allows for the controlled manipulation of valley isospins. We compare our analytical model to another type of ring with strong intervalley scattering. For the latter case, we study a ring of hexagonal form with lattice-terminated zigzag edges numerically. We find for the hexagonal ring that the orbital degeneracy can still be controlled via the flux, similar to the ring with the mass confinement.
description: 7 pages, 7 figures, replaced with considerably extended new version
Thump, ring: the sound of a bouncing ball
Creators: name: Katz, J. I.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Popular Physics (physics.pop-ph)
subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: A basketball bounced on a stiff surface produces a characteristic loud thump, followed by high-pitched ringing. Describing the ball as an inextensible but flexible membrane containing compressed air, I formulate an approximate theory of the generation of these sounds and predict their amplitudes and waveforms.
description: 9 pp., 2 figs. New figure
Lepton flavour violating processes in an S_3-symmetric model
Creators: name: Mondragon, A.
name: Mondragon, M.
name: Peinado, E.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A variety of lepton flavour violating effects related to the recent discovery of neutrino oscillations and mixings is here systematically discussed in terms of an S_3-flavour permutational symmetry. After presenting some relevant results on lepton masses and mixings, previously derived in a minimal S_3-invariant extension of the Standard Model, we compute the branching ratios of some selected flavour-changing neutral current processes (FCNC) as well as the contribution of the exchange of neutral flavour-changing scalar to the anomaly of the magnetic moment of the muon. We found that the minimal S_3-invariant extension of the Standard Model describes successfully masses and mixings, as well as, all flavour changing neutral current processes in excellent agreement with experiment.
description: Talk given at XXXI Symposium on Nuclear Physics, Cocoyoc Mexico, January of 2008. To appear in Revista Mexicana de Fisica
Exploring Latent Factors Influencing the Adoption of a Processed Food Traceability System in South Korea
Creators: name: Cho, Sanggoo
name: Choi, Gyunghyun
Publisher: name: International Journal on Food System Dynamics
Year: 2019
Subjects: food traceability systems; technology acceptance model; diffusion and adoption of FTS; structural equation model; processed food sector

description: Several recalls of dietary supplements and infant formula not only caused direct economic loss to processors but also created distrust of food traceability systems(FTSs) initiated by government. In Korea, mandatory FTS regulations on infant formula and dietary supplements were enacted at the end of 2014, allowing the government to collect electronic traceability data to cope with food outbreaks. The aim of this study is to examine the influence and process of latent factors by developing a theoretical model and testing empirical data from the Korean processed food sector. The particular value of this study is to identify the latent factors influencing the diffusion of
an electronic FTS. Three external factors (organizational adaptability, validity and awareness of FTS) were incorporated into a technology acceptance model (TAM) based on previous studies, and structural equation modeling (SEM) was used as a tool for confirmatory analysis. The validity of FTSs has a prominent effect on attitudes toward FTSs and compliance intentions. Contrary to the findings of previous studies, organizational adaptability does not influence a positive effect on attitudes toward FTS. Furthermore, subgroup analysis showed
that retailers reacted significantly to the different influences than manufacturers. The findings of this paper have implications for both policy makers and regulatory authorities. The results of this theoretical and practical study contribute to establishing a conceptual framework and motivate additional researches on FTS adoption and diffusion in processed food sectors.
description: International Journal on Food System Dynamics, Vol 10, No 2 (2019)
The Role of Inter‐Organisational Relations and Networks in Agribusiness: The Case for the Polish Fruit and Vegetable Industry
Creators: name: Wiśniewska‐Paluszak, Joanna A.
name: Paluszak, Grzegorz T.
Publisher: name: International Journal on Food System Dynamics
Year: 2019
Subjects: inter‐organisational network relationship; network approach; agribusiness network; fruit and vegetable processing industry

description: This paper contributes to the ongoing discussions on the benefits of inter‐organisational networks (IONs) in agribusiness. It is based on the field of inter‐organisational relations (IORs) and network approaches that are applied in the framework of the Activities‐Resources‐Actors (ARA) model. The aim of this paper is to recognise and evaluate the distinguishing features of network relationships, which lead to better defined networks in agribusiness. Polish fruit and vegetable producers, processors and traders were investigated in this study. The study reveals that the main objectives of network relationships are to increase profits, this is linked to the optimisation of supplies and provisions, the building of communities and relationships and sustainable development. The outcomes of network relationships have been recognised as the non‐transactional exchange of knowledge and information, mutual adaptations, adjustments and standardisations. They are led by strong transactional relationships in the supply chain, which are based on pricing conditions, terms of payments, formal contracts and cooperation. This study distinguishes five categories of inter‐organisational network relationships they are: very strong operational, strong sustainable, moderate social, weak innovative and very weak shared resources. The paper concludes that the studied networks are characterised by strong activity and actor ties and weak resources bonds. Specifically the lack of shared resources might negatively influence the networks innovation and sustainability in the future.
description: International Journal on Food System Dynamics, Vol 10, No 2 (2019)
Additional file 4 of Cost burden and net monetary benefit loss of neonatal hypoglycaemia
Creators: name: Glasgow, Matthew J.
name: Edlin, Richard
name: Harding, Jane E.
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Neuroscience
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Cancer
subject: Science Policy
subject: Computational Biology

description: Additional file 4: Supplementary Table 3. Costs of single health state conditions.
FluxCT V2.0: Updates to a Web Tool Identifying Contaminating Flux in Space Telescope Data
Creators: name: Dong, Zillin
name: Schonhut-Stasik, Jessica
name: Stassun, Keivan G.
Publisher: name: arXiv
Year: 2025
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present FluxCT V2.0, an updated web tool for identifying contaminating flux in Kepler and TESS target pixel files. FluxCT V2.0 focuses on enhancing functionality, user experience, and data processing capabilities. We resolved existing issues to allow for an extended user base, removed known bugs, and extended the tool to any TESS pixel file, allowing the user to search any TESS point object. A batch code for TESS is now available on the companion GitHub. Additional output parameters, such as amplitude dilution and a magnitude cut, have been added to the tool, allowing users more freedom to analyze the possible effects of target sources.
description: Published to Research Notes of the American Astronomical Society in November 2024. Code available at this GitHub: https://github.com/Jesstella/FluxCT
Homogenization of nonlinear scalar conservation laws
Creators: name: Dalibard, Anne-Laure
Publisher: name: arXiv
Year: 2007
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35B27 ; 35L60

description: We study the limit as $\e\to 0$ of the entropy solutions of the equation $\p_t \ue + \dv_x[A(\frac{x}{\e},\ue)] =0$. We prove that the sequence $\ue$ two-scale converges towards a function $u(t,x,y)$, and $u$ is the unique solution of a limit evolution problem. The remarkable point is that the limit problem is not a scalar conservation law, but rather a kinetic equation in which the macroscopic and microscopic variables are mixed. We also prove a strong convergence result in $L^1_{\text{loc}}$.
description: 34 pages
Benefits of Regional Food Quality Labels for Czech Producers
Creators: name: Sadílek, Tomáš
Publisher: name: International Journal on Food System Dynamics
Year: 2019
Subjects: benefits; quality labels; producers; Czech Republic

description: The objective of this paper is to evaluate the benefits of regional food quality labels for producers using the example of the Czech quality label, Regionální potravina (Regional Food). To do so, a telephone survey was carried out on a sample of 208 Czech food producers who have acquired the Regionální potravina quality label for some of their products. The results show that the producers have seen a positive improvement in sales following acquisition
of the quality label, although they have not noticed greater interest in their products during campaigns to support awareness of the Regionální potravina quality label.
description: International Journal on Food System Dynamics, Vol 10, No 2 (2019)
Search for excited spin-3/2 and spin-1/2 leptons at linear colliders
Creators: name: Cakir, O.
name: Ozansoy, A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the single production of excited spin-3/2 and spin-1/2 leptons in future high energy $e^+e^-$ collisions. We calculate the production cross section and decay widths of excited spin-3/2 and spin-1/2 leptons according to their effective currents. We show that these possible new excited states can be probed up to the mass $m^*$ ~ $\sqrt{s}$ depending on their couplings to leptons and gauge bosons. We present the angular distributions of final state particles as a measure to discriminate between an excited spin-3/2 and spin-1/2 lepton signal. The signals and the corresponding backgrounds are studied in detail to obtain attainable limits on masses and couplings of excited leptons at future linear colliders
description: 20 pages, 8 figures, 5 tables
Modelling White Shrimp (Nematopalaemon hastatus) Value Chain Using Combined SWOT and AHP
Creators: name: Omobepade, Bayode Paul
name: Adebayo, Olabode Thomas
name: Amos, Taiwo Timothy
Publisher: name: International Journal on Food System Dynamics
Year: 2019
Subjects: shrimp; value chain; SWOT; analytic hierarchy process; coastal areas; Nigeria

description: The objective of this study is to model white shrimp (Nematopalaemon hastatus) value chains in the Coastal areas of
Ondo State, Nigeria using a strength, weakness, opportunities and threat (SWOT) analysis in combination with an analytical hierarchy process (AHP). Nineteen (19) participants in the value chain comprised of shrimpers, processors, marketers, consumers, fishery managers, and resource economists identified and prioritized the SWOT factors at each stage of the N. hastatus value chain including shrimping (fishery), processing, marketing, and the consumption level. The results provide the base for recommendations for policy and research in Nigeria and other developing nations aimed at ensuring sustainable shrimping, efficient processing and marketing as well as improvements in consumers’ awareness and satisfaction through the development of standards and sustainable operation procedures for fishery, the development of cheaper and safer processing technology, the modernization of markets, and the
development of value‐added shrimp products.
description: International Journal on Food System Dynamics, Vol 10, No 2 (2019)
Additional file 5 of Cost burden and net monetary benefit loss of neonatal hypoglycaemia
Creators: name: Glasgow, Matthew J.
name: Edlin, Richard
name: Harding, Jane E.
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Neuroscience
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Cancer
subject: Science Policy
subject: Computational Biology

description: Additional file 5: Supplementary Table 4. Utility weights.
Measurement of the decay of Fock states in a superconducting quantum circuit
Creators: name: Wang, H.
name: Hofheinz, M.
name: Ansmann, M.
name: Bialczak, R. C.
name: Lucero, E.
name: Neeley, M.
name: O'Connell, A. D.
name: Sank, D.
name: Wenner, J.
name: Cleland, A. N.
name: Martinis, John M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We demonstrate the controlled generation of Fock states with up to 15 photons in a microwave coplanar waveguide resonator coupled to a superconducting phase qubit. The subsequent decay of the Fock states, due to dissipation, is then monitored by varying the time delay between preparing the state and performing a number-state analysis. We find that the decay dynamics can be described by a master equation where the lifetime of the n-photon Fock state scales as 1/n, in agreement with theory. We have also generated a coherent state in the microwave resonator, and monitored its decay process. We demonstrate that the coherent state maintains a Poisson distribution as it decays, with an average photon number that decreases with the same characteristic decay time as the one-photon Fock state.
description: 4 pages, 5 figures, and 1 table
Coronary angiography in acute ischemic stroke patients: frequency and determinants of pathological findings in a multicenter cohort study
Creators: name: Litmeier, Simon
name: Meinel, Thomas R.
name: Von Rennenberg, Regina
name: Kniepert, Joachim U.
name: Audebert, Heinrich J.
name: Endres, Matthias
name: Jung, Simon
name: Scheitz, Jan F.
name: Nolte, Christian H.
Publisher: name: Charité - Universitätsmedizin Berlin
Year: 2022
Subjects: subject: Heart and brain axis
subject: Acute ischemic stroke
subject: Myocardial injury
subject: Stroke-heart-syndrome
subject: 600 Technik, Medizin, angewandte Wissenschaften::610 Medizin und Gesundheit::610 Medizin und Gesundheit

description: Background: Myocardial injury as indicated by cardiac troponin elevation is associated with poor prognosis in acute stroke patients. Coronary angiography (CAG) is the diagnostic gold-standard to rule-out underlying obstructive coronary artery disease (CAD) in these patients. However, weighing risks and benefits of coronary angiography (CAG) against each other is particularly challenging, because stroke patients undergoing CAG may have a higher risk for secondary intracranial bleeding. Current guidelines remain vague. Thus, the aim of this study was to analyze frequency of pathological findings of CAG and associated clinical factors. Methods: We analyzed indications and frequency of CAG performed in acute ischemic stroke patients in clinical routine in two European tertiary care hospitals from 2011 to 2018. All data were obtained retrospectively. Multiple logistic regression analyses were performed to identify variables associated with absence of obstructive coronary artery disease defined as presence of at least one coronary vessel stenosis >= 50%. Results: A total of 139 AIS patients underwent CAG. Frequent indications for CAG were suspected acute coronary syndrome (N = 114) or scheduled cardiac surgery (N = 25). Acute coronary stenting was applied in 51/139 patients. Among patients with suspected acute coronary syndrome, no obstructive CAD was found in 27/114 patients. Absence of obstructive CAD was associated with insular cortex lesions, no clinical symptoms for ACS, less than three cardiovascular risk factors, younger age and normal wall motion. Conclusion: Several variables suggest absence of CAD in AIS patients and may help in clinical decision making in stroke patients with myocardial injury.
Ethical Dilemmas in Religious Studies and Ethnographic Research: an Educational Scenario
Creators: name: Loulová, Petra
Publisher: name: Zenodo
Year: 2023
Subjects: research integrity
science ethics
Religious studies
ethnographic research
impact of science
scientific bias
scientific objectivity
cultural respect

description: This educational scenario has been created as a part of the Research Integrity course at the Vrije Universiteit in Amsterdam. It introduces a hypothetical situation that might emerge in ethnographic research, focusing on the specific area of Religious studies and the context of a PhD project.It opens issues such as relationships between PhD candidate and supervisor, personal bias in research, balance of personal relationships to respondents, or dilemmas between scientific objectivity and general impact of research.It includes questions for researchers and supervisors, combining different levels and issues in the context.
The HETDEX Instrumentation: Hobby-Eberly Telescope Wide Field Upgrade and VIRUS
Creators: name: Hill, Gary J.
name: Lee, Hanshin
name: MacQueen, Phillip J.
name: Kelz, Andreas
name: Drory, Niv
name: Vattiat, Brian L.
name: Good, John M.
name: Ramsey, Jason
name: Kriel, Herman
name: Peterson, Trent
name: DePoy, D. L.
name: Gebhardt, Karl
name: Marshall, J. L.
name: Tuttle, Sarah E.
name: Bauer, Svend M.
name: Chonis, Taylor S.
name: Fabricius, Maximilian H.
name: Froning, Cynthia
name: Haeuser, Marco
name: Indahl, Briana L.
name: Jahn, Thomas
name: Landriau, Martin
name: Leck, Ron
name: Montesano, Francesco
name: Prochaska, Travis
name: Snigula, Jan M.
name: Zeimann, Gregory R.
name: Bryant, Randy
name: Damm, George
name: Fowler, J. R.
name: Janowiecki, Steven
name: Martin, Jerry
name: Mrozinski, Emily
name: Odewahn, Stephen
name: Rostopchin, Sergey
name: Shetrone, Matthew
name: Spencer, Renny
name: Cooper, Erin Mentuch
name: Armandroff, Taft
name: Bender, Ralf
name: Dalton, Gavin
name: Hopp, Ulrich
name: Komatsu, Eiichiro
name: Nicklas, Harald
name: Ramsey, Lawrence W.
name: Roth, Martin M.
name: Schneider, Donald P.
name: Sneden, Chris
name: Steinmetz, Matthias
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The Hobby-Eberly Telescope (HET) Dark Energy Experiment (HETDEX) is undertaking a blind wide-field low-resolution spectroscopic survey of 540 square degrees of sky to identify and derive redshifts for a million Lyman-alpha emitting galaxies (LAEs) in the redshift range 1.9 < z < 3.5. The ultimate goal is to measure the expansion rate of the Universe at this epoch, to sharply constrain cosmological parameters and thus the nature of dark energy. A major multi-year wide field upgrade (WFU) of the HET was completed in 2016 that substantially increased the field of view to 22 arcminutes diameter and the pupil to 10 meters, by replacing the optical corrector, tracker, and prime focus instrument package and by developing a new telescope control system. The new, wide-field HET now feeds the Visible Integral-field Replicable Unit Spectrograph (VIRUS), a new low-resolution integral field spectrograph (LRS2), and the Habitable Zone Planet Finder (HPF), a precision near-infrared radial velocity spectrograph. VIRUS consists of 156 identical spectrographs fed by almost 35,000 fibers in 78 integral field units arrayed at the focus of the upgraded HET. VIRUS operates in a bandpass of 3500-5500 Angstroms with resolving power R~800. VIRUS is the first example of large scale replication applied to instrumentation in optical astronomy to achieve spectroscopic surveys of very large areas of sky. This paper presents technical details of the HET WFU and VIRUS, as flowed-down from the HETDEX science requirements, along with experience from commissioning this major telescope upgrade and the innovative instrumentation suite for HETDEX.
description: 65 pages, 25 figures, published in the Astronomical Journal; replaced with final published version
Equilibrium of stellar dynamical systems in the context of the Vlasov-Poisson model
Creators: name: perez, jerome
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: This short review is devoted to the problem of the equilibrium of stellar dynamical systems in the context of the Vlasov-Poisson model. In a first part we will review some classical problems posed by the application of the Vlasov-Poisson model to the astrophysical systems like globular clusters or galaxies. In a second part we will recall some recent numerical results which may give us some some quantitative hints about the equilibrium state associated to those systems.
description: 8 pages, no figures, accepted in Communications in Nonlinear Science and Numerical Simulation
Serum anti-NMDA-receptor antibodies and cognitive function after ischemic stroke (PROSCIS-B)
Creators: name: Sperber, Pia S.
name: Gebert, Pimrapat
name: Broersen, Leonie H. A.
name: Huo, Shufan
name: Piper, Sophie K.
name: Teegen, Bianca
name: Heuschmann, Peter U.
name: Prüss, Harald
name: Endres, Matthias
name: Liman, Thomas G.
name: Siegerink, Bob
Publisher: name: Charité - Universitätsmedizin Berlin
Year: 2022
Subjects: subject: Stroke
subject: Ischemia
subject: Epidemiology
subject: Antibodies
subject: Cognitive dysfunction
subject: 600 Technik, Medizin, angewandte Wissenschaften::610 Medizin und Gesundheit::610 Medizin und Gesundheit

description: Objective: We aimed to investigate whether serum anti-N-methyl-D-aspartate-receptor GluN1 (previously NR1) antibody (NMDAR1-abs) seropositivity impacts cognitive function (CF) in the long term following ischemic stroke. Methods: Data were used from the PROSpective Cohort with Incident Stroke-Berlin. NMDAR1-abs (IgM/IgA/IgG) were measured with cell-based assays from serum obtained within 7 days after the first-ever stroke. Seropositivity was defined as titers >= 1:10, low titers as <= 1:100 and high titers as > 1:100. We assessed CF at 1, 2 and 3 years after stroke with the Telephone Interview for Cognitive Status-modified (TICS-m) and used crude and propensity score adjusted inverse probability weighted generalized linear models to estimate the impact of NMDAR1-abs serostatus on TICS-m. Results: Data on NMDAR1-abs (median day of sampling = 4[IQR = 2-5]) were available in 583/621 PROSCIS-B patients (39% female; median NIHSS = 2[IQR = 1-4]; median MMSE = 28[IQR:26-30]), of whom 76(13%) were seropositive (IgM: n = 48/IgA: n = 43/IgG: n = 2). Any NMDAR1-abs seropositivity had no impact on TICS-m compared to seronegative patients (beta crude = 0.69[95%CI = - 0.84 to 2.23]; beta adjusted = 0.65[95%CI = - 1.00 to 2.30]). Patients with low titers scored better on TICS-m compared to seronegative patients (beta crude = 2.33[95%CI = 0.76 to 3.91]; beta adjusted = 2.47[95%CI = 0.75 to 4.19]); in contrast, patients with high titers scored lower on TICS-m (beta crude = -2.82[95%CI = - 4.90 to - 0.74], beta adjusted = - 2.96[95%CI = - 5.13 to - 0.80]), compared to seronegative patients. Conclusion: In our study, NMDAR1-abs seropositivity did not affect CF over 3 years after a first mild to moderate ischemic stroke. CF differed according to NMDAR1-abs serum titer, with patients with high NMDAR1-abs titers having a less favorable cognitive outcome compared to seronegative patients.
Defining a Conceptual Model for Market Mechanisms in Food Supply Chains, and Parameterizing Price Functions for Coffee, Wheat, Corn, Soybeans, and Beef
Creators: name: Olafsdottir, Anna Hulda
name: Sverdrup, Harald Ulrik
Publisher: name: International Journal on Food System Dynamics
Year: 2019
Subjects: market price; market; supply chain modelling; grain; beef; system dynamics

description: The contribution of the study presented in this paper is twofold. Firstly, to add to the present body of knowledge of food supply and demand model dynamics and the associated economics, based on system analysis. It describes a new approach for dealing with price mechanisms in models based on causal links and dynamic feedbacks. It has been applied to some main global food commodities, but has also been used for metals and materials in a parallel study. The price mechanism is described in a way to be useful for other modelers dealing with price mechanism, and it enables modelers to make dynamic price endogenous in models. Secondly, it presents price function curves for different food commodities, parameterizing a fundamental property of the commodity trade.
description: International Journal on Food System Dynamics, Vol 10, No 2 (2019)
Additional file 6 of Cost burden and net monetary benefit loss of neonatal hypoglycaemia
Creators: name: Glasgow, Matthew J.
name: Edlin, Richard
name: Harding, Jane E.
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Neuroscience
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Cancer
subject: Science Policy
subject: Computational Biology

description: Additional file 6: Supplementary Table 5. Prevalences of single health state conditions.
Los problemas socioambientales a raíz del ecoturismo en el Parque Nacional Natural Tayrona, Colombia
Creators: name: Müller, Elena Marina
Publisher: name: Freie Universität Berlin
Year: 2024
Subjects: subject: ecoturismo
subject: conservación áreas protegidas
subject: territorios ancestrales
subject: ecoturism
subject: conservation
subject: ancestral territories
subject: 300 Sozialwissenschaften::300 Sozialwissenschaften, Soziologie::300 Sozialwissenschaften

description: This case study examines and analyses the socio-environmental impacts of the implementation of ecotourism in Colombia’s Tayrona National Natural Park from the period following the peace agreements in 2016 until 2021. This paper explores the social and environmental implications of ecotourism as a means of territorial pacification, assessing the park’s environmental trajectory and the current administration to determine if its management aligns with the ecotourism objectives of environmental conservation and protection of indigenous communities within their ancestral territory. Additionally, the study also evaluates the debate surrounding the environmental and cultural sustainability of ecotourism as a development strategy, and assesses its positive and negative impacts on this natural area previously affected by armed conflict.
description: Este trabajo busca estudiar e interpretar los impactos socioambientales en el Parque Nacional Natural Tayrona en Colombia producidos por el ecoturismo en el marco temporal de los Acuerdos de Paz en el año 2016 hasta el año 2021. La discusión acerca del ecoturismo destaca por su actualidad y este estudio de caso trata de investigar las implicaciones sociales y medioambientales provocadas por el proceso de pacificación y los cambios de política y dirección ambiental implementados en el Parque Tayrona a partir del año 2016. Se investiga de qué manera el manejo del Parque es acorde a las máximas ecoturísticas de conservación ambiental y protección del territorio ancestral de las comunidades indígenas. Para ello se incluye en el análisis, en primer lugar, el debate sobre la sostenibilidad ambiental y cultural del ecoturismo y de la gestión del Parque Natural, para luego indagar tanto los impactos positivos como negativos de la implementación del ecoturismo como modelo de desarrollo en esta zona geográfica afectada por el conflicto armado interno colombiano.
Quantum superposition of spacetimes obeys Einstein's Equivalence Principle
Creators: name: Giacomini, Flaminia
name: Brukner, Časlav
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We challenge the view that there is a basic conflict between the fundamental principles of Quantum Theory and General Relativity, and in particular the fact that a superposition of massive bodies would lead to a violation of the Equivalence Principle. It has been argued that this violation implies that such a superposition must inevitably spontaneously collapse (like in the Diósi-Penrose model). We identify the origin of such an assertion in the impossibility of finding a local, classical reference frame in which Einstein's Equivalence Principle would hold. In contrast, we argue that the formulation of the Equivalence Principle can be generalised so that it holds for reference frames that are associated to quantum systems in a superposition of spacetimes. The core of this new formulation is the introduction of a quantum diffeomorphism to such Quantum Reference Frames (QRFs). This procedure reconciles the principle of linear superposition in Quantum Theory with the principle of general covariance and the Equivalence Principle of General Relativity. Hence, it is not necessary to invoke a gravity-induced spontaneous state reduction when a massive body is prepared in a spatial superposition.
description: 6 pages, 2 figures. Invited contribution to the Special Topic Collection "Celebrating Sir Roger Penrose's Nobel Prize". Very close to the published version
The child’s influence on parental purchase patterns for breakfast foods
Creators: name: Fisher, Dorothy
Publisher: name: University of British Columbia
Year: 2010

description: This study was conducted to examine the effectiveness the preschool child in stimulating a behavior change within the parent(s) with respect to food purchase patterns and choices offered to the child. One hundred and three families associated with six nursery schools located within the Simon Fraser Health Unit were involved in the study. The nursery schools were randomly assigned to one of three experimental conditions: the control group whose children carried on with routine nursery school activities, the transfer materials group whose children received nutrition pamphlets and the treatment group who in addition to receiving nutrition pamphlets also participated in an activity oriented breakfast program over the course of four weeks. Following the four week period the parents of all children received a questionnaire which was brought home by the child and returned anonymously by the parent to the nursery school. A response rate of 89 percent was obtained. The questionnaire used in the study examined two aspects of parental behavior: the food purchase patterns and those patterns centering around the types of foods offered to the preschool child at breakfast.
Coupling Superconducting Qubits via a Cavity Bus
Creators: name: Majer, J.
name: Chow, J. M.
name: Gambetta, J. M.
name: Koch, Jens
name: Johnson, B. R.
name: Schreier, J. A.
name: Frunzio, L.
name: Schuster, D. I.
name: Houck, A. A.
name: Wallraff, A.
name: Blais, A.
name: Devoret, M. H.
name: Girvin, S. M.
name: Schoelkopf, R. J.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Superconductivity (cond-mat.supr-con)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Superconducting circuits are promising candidates for constructing quantum bits (qubits) in a quantum computer; single-qubit operations are now routine, and several examples of two qubit interactions and gates having been demonstrated. These experiments show that two nearby qubits can be readily coupled with local interactions. Performing gates between an arbitrary pair of distant qubits is highly desirable for any quantum computer architecture, but has not yet been demonstrated. An efficient way to achieve this goal is to couple the qubits to a quantum bus, which distributes quantum information among the qubits. Here we show the implementation of such a quantum bus, using microwave photons confined in a transmission line cavity, to couple two superconducting qubits on opposite sides of a chip. The interaction is mediated by the exchange of virtual rather than real photons, avoiding cavity induced loss. Using fast control of the qubits to switch the coupling effectively on and off, we demonstrate coherent transfer of quantum states between the qubits. The cavity is also used to perform multiplexed control and measurement of the qubit states. This approach can be expanded to more than two qubits, and is an attractive architecture for quantum information processing on a chip.
description: 6 pages, 4 figures, to be published in Nature
Additional file 1 of Mapping evidence of depression in HIV-seropositive MSM in sub-Saharan Africa: a scoping review protocol
Creators: name: Mulqueeny, Delarise M.
name: Senzelokuhle M. Nkabini
name: Manduleli H. Pokiya
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Biotechnology
subject: Cancer
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences
subject: 110309 Infectious Diseases

description: Additional file 1. PRISMA-P 2015 Checklist.
Long-range hopping and indexing assumption in one-dimensional topological insulators
Creators: name: Dias, R. G.
name: Marques, A. M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: In this paper, we show that the introduction of long-range hoppings in 1D topological insulator models implies that different possibilities of site indexing must be considered when determining the bulk topological invariants in order to avoid the existence of hidden symmetries. The particular case of the extended SSH chain is addressed as an example where such behavior occurs. In this model, the introduction of long-range hopping terms breaks the bipartite property and a band inversion occurs in the band structure as the relative values of the hopping terms change, signaling a crossover between hopping parameter regions of "influence" of different chiral symmetries. Furthermore, edge states become a linear combination of edge-like states with different localization lengths and reflect the gradual transition between these different chiral symmetries.
description: 12 pages, 6 figures
Additional file 2 of Mapping evidence of depression in HIV-seropositive MSM in sub-Saharan Africa: a scoping review protocol
Creators: name: Mulqueeny, Delarise M.
name: Senzelokuhle M. Nkabini
name: Manduleli H. Pokiya
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Biotechnology
subject: Cancer
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences
subject: 110309 Infectious Diseases

description: Additional file 2: Table 2. Draft search for MEDLINE/EBSCOhost.
Cooperation and Conflict: Diverging Trends in the Relationship Between International and Domestic Law
Creators: name: Krieger, Heike
name: Lange, Felix
name: Aust, Helmut Philipp
Publisher: name: Freie Universität Berlin
Year: 2024
Subjects: subject: International law
subject: domestic law
subject: co-operation
subject: conflict
subject: opposing trends
subject: 300 Sozialwissenschaften::340 Recht::340 Recht

description: This chapter of the emerging new Research Handbook on International Law and Domestic Legal Systems offers concluding observations on the centrality of different visions of the international for the relationship between domestic and international law. The contributions demonstrate that competing perceptions of the international as a space for co-operation and solidarity on the one hand and as an arena of conflict on the other are competing with each other. The editors point to key doctrinal responses to these opposite trends: accepting conflict, deference by international courts, the presumption of compatibility and the deepening of pluralist approaches.
Probabilistic study of the speed of approach to equilibrium for an inelastic Kac model
Creators: name: Bassetti, Federico
name: Ladelli, Lucia
name: Regazzini, Eugenio
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mathematical Physics (math-ph)
subject: Probability (math.PR)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 60f05,82C40

description: This paper deals with a one--dimensional model for granular materials, which boils down to an inelastic version of the Kac kinetic equation, with inelasticity parameter $p>0$. In particular, the paper provides bounds for certain distances -- such as specific weighted $χ$--distances and the Kolmogorov distance -- between the solution of that equation and the limit. It is assumed that the even part of the initial datum (which determines the asymptotic properties of the solution) belongs to the domain of normal attraction of a symmetric stable distribution with characteristic exponent $\a=2/(1+p)$. With such initial data, it turns out that the limit exists and is just the aforementioned stable distribution. A necessary condition for the relaxation to equilibrium is also proved. Some bounds are obtained without introducing any extra--condition. Sharper bounds, of an exponential type, are exhibited in the presence of additional assumptions concerning either the behaviour, near to the origin, of the initial characteristic function, or the behaviour, at infinity, of the initial probability distribution function.
title: The Impact of the 21st Century Commodity Supercycle on Natural-Resource Dependent Economies
title: The Case of Bolivia and Peru
titleType: Subtitle
Creators: name: Agramont-Lechín, Daniel
Publisher: name: Freie Universität Berlin
Year: 2024
Subjects: subject: extractivism
subject: neoliberalism
subject: post-neoliberalism
subject: natural resource dependence
subject: 300 Sozialwissenschaften::300 Sozialwissenschaften, Soziologie::300 Sozialwissenschaften

description: In the early 21st century, Bolivia and Peru experienced remarkable economic growth, coupled with notable reductions in poverty and inequality. However, the subsequent economic slowdown triggered by declining international commodity prices raised concerns about the sustainability of their progress. Historically, both nations have been vulnerable to fluctuations in global commodity prices, often resulting in social unrest and political instability. This study examines whether the significant influx of resources to Bolivia and Peru from 2003 to 2013, attributed to the commodity boom, fostered structural transformation or, on the contrary, reinforced their dependence on the global economy. Analyzing macroeconomic and productivity data, the research indicates a strong correlation between their economic performance and the commodity supercycle trend. A primary finding suggests that rather than fostering a more self-reliant economic integration, the 21st-century economic boom exacerbated the reliance of both nations on natural resource extraction. However, a more nuanced examination reveals divergent medium-term impacts driven by each nation’s development model. Peru, through diversification of international revenue streams and prudent macroeconomic policies, managed to mitigate the effects of declining commodity prices. In contrast, Bolivia’s economy bore the brunt of diminishing income, not only due to the end of the commodity boom but also due to insufficient investments in productive sectors.
A Lattice Model for Colloidal Gels and Glasses
Creators: name: Krzakala, Florent
name: Tarzia, Marco
name: Zdeborová, Lenka
Publisher: name: arXiv
Year: 2008
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study a lattice model of attractive colloids. It is exactly solvable on sparse random graphs. As the pressure and temperature are varied it reproduces many characteristic phenomena of liquids, glasses and colloidal systems such as ideal gel formation, liquid-glass phase coexistence, jamming, or the reentrance of the glass transition.
description: 4 pages, 4 figures
Additional file 1 of Complex chronic patients as an emergent group with high risk of intracerebral haemorrhage: an observational cohort study
Creators: name: Lorman-Carbó, Blanca
name: Clua-Espuny, Josep Lluís
name: Eulàlia Muria-Subirats
name: Ballesta-Ors, Juan
name: González-Henares, Maria Antònia
name: Fernández-Sáez, José
name: Martín-Luján, Francisco M.
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Biotechnology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Science Policy
subject: Computational Biology

description: Additional file 1.
Risk and course of COVID-19 in immunosuppressed patients with myasthenia gravis
Creators: name: Stascheit, Frauke
name: Grittner, Ulrike
name: Hoffmann, Sarah
name: Mergenthaler, Philipp
name: Schroeter, Michael
name: Ruck, Tobias
name: Pawlitzki, Mark
name: Blaes, Franz
name: Kaiser, Julia
name: Schara, Ulrike
name: Della-Marina, Adela
name: Thieme, Andrea
name: Hagenacker, Tim
name: Jacobi, Christian
name: Berger, Benjamin
name: Urban, Peter P.
name: Knop, Karl Christian
name: Schalke, Berthold
name: Lee, De-Hyung
name: Kalischewski, Petra
name: Wiendl, Heinz
name: Meisel, Andreas
Publisher: name: Charité - Universitätsmedizin Berlin
Year: 2022
Subjects: subject: Myasthenia gravis
subject: COVID-19
subject: Immunosuppressive therapies
subject: Outcome
subject: German myasthenia gravis registry
subject: 600 Technik, Medizin, angewandte Wissenschaften::610 Medizin und Gesundheit::610 Medizin und Gesundheit

description: Background: Patients with myasthenia gravis (MG) are potentially prone for a severe COVID-19 course, but there are limited real-world data available on the risk associated with COVID-19 for patients with MG. Here, we investigate whether current immunosuppressive therapy (IST) influences the risk of SARS-CoV-2 infection and COVID-19 severity. Methods: Data from the German myasthenia gravis registry were analyzed from May 2020 until June 2021 and included patient demographics, MG disease duration, comorbidities, current IST use, COVID-19 characteristics, and outcomes. Propensity score matching was employed to match MG patients with IST to those without, and multivariable binary logistic regression models were used to determine associations between IST with (1) symptomatic SARS-CoV-2 infection and (2) severe COVID-19 course, as measured by hospitalization or death. Results: Of 1379 patients with MG, 95 (7%) patients (mean age 58 (standard deviation [SD] 18) presented with COVID-19, of which 76 (80%) received IST at time of infection. 32 patients (34%) were hospitalized due to COVID-19; a total of 11 patients (12%) died. IST was a risk factor for hospitalization or death in the group of COVID-19-affected MG patients (odds ratio [OR] 3.04, 95% confidence interval [CI] =1.02-9.06, p = 0.046), but current IST was not associated with a higher risk for SARS-CoV-2 infection itself. Discussion: In this national MG cohort study, current IST use was a risk factor for a severe disease course of COVID-19 but not for SARS-CoV-2 infection itself. These data support the consequent implementation of effective strategies to prevent COVID-19 in this high-risk group.
The Geometric Phase and Gravitational Precession of D-Branes
Creators: name: Pedder, Chris
name: Sonner, Julian
name: Tong, David
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study Berry's phase in the D0-D4-brane system. When a D0-brane moves in the background of D4-branes, the first excited states undergo a holonomy described by a non-Abelian Berry connection. At weak coupling this is an SU(2) connection over R^5, known as the Yang monopole. At strong coupling, the holonomy is recast as the classical gravitational precession of a spinning particle. The Berry connection is the spin connection of the near-horizon limit of the D4-branes, which is a continuous deformation of the Yang and anti-Yang monopole.
description: 23 pages; v3: typos corrected
Massive electrons and unconventional room-temperature superconductivity in superhydrides
Creators: name: De Silva, Theja N.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The search for room-temperature superconducting materials has been at the center of modern research for decades. The recent discovery of high-temperature superconductivity, under extreme pressure in hydrogen-rich materials, is a tremendous achievement in this research front. This discovery offers a route in the search for room temperature superconductivity at ambient pressure. The superconductivity of these hydrogen-rich materials was confirmed by the observation of zero-resistance, isotope effects, effect of magnetic field, and other standard properties. However, some of the experimental features were puzzling as they were not consistent with the known superconductivity theories. These debatable features have lead to a series of recent publications downplaying the existence of superconductivity in these superhydrides. Here we propose a concept of massive electrons under pressure and successfully explain all non-standard experimental observations. Our massive electron concept explains the large effective mass of the quasiparticles, the reason for the high critical temperatures for moderate electron-phonon couplings, and a 3-5 orders of magnitude larger conductivity causing a narrow resistivity broadening at the transition in the presence of magnetic field. We anticipate our findings will lead to a new directions and tweaks in current research in the search for ambient-pressure, room-temperature superconductors.
description: Eight pages with one figure
Energy distribution and cooling of a single atom in an optical tweezer
Creators: name: Tuchendler, C.
name: Lance, A. M.
name: Browaeys, A.
name: Sortais, Y. R. P.
name: Grangier, P.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate experimentally the energy distribution of a single rubidium atom trapped in a strongly focused dipole trap under various cooling regimes. Using two different methods to measure the mean energy of the atom, we show that the energy distribution of the radiatively cooled atom is close to thermal. We then demonstrate how to reduce the energy of the single atom, first by adiabatic cooling, and then by truncating the Boltzmann distribution of the single atom. This provides a non-deterministic way to prepare atoms at low microKelvin temperatures, close to the ground state of the trapping potential.
description: 9 pages, 6 figures, published in PRA