Opportunities for farming in alpine countries – pathways to truly grassland-based beef and milk production in Austria and Switzerland

Farming in the alpine countries of Austria and Switzerland fulfils important economic, socio-cultural and ecological functions for society. However, even though both Austria and Switzerland have increasingly focused their agricultural policy towards ecology, in both countries negative environmental impacts of agriculture still have to be reduced massively

Nutztierhaltung in den Alpenländern: Wege zu einer graslandbasierten Milch- und Fleischproduktion

Die Landwirtschaft erfüllt für die Gesellschaft wichtige wirtschaftliche, soziokulturelle und ökologische Funktionen. Gleichwohl hat sie starke negative Auswirkungen auf den Zustand der Ökosysteme. Daran konnte auch die Ökologisierung der Agrarpolitik seit Anfang der 1990er Jahre nicht prinzipiell etwas ändern. Aufgrund der großen Bedeutung von Grünland für die Landwirtschaft in der Schweiz (60 % der landwirtschaftlichen Nutzfläche) und Österreich (40 %) ist die Rolle der Wiederkäuer für eine ökologisch nachhaltige Agrar- und Ernährungspolitik besonders wichtig. Vor diesem Hintergrund haben wir analysiert, inwieweit standortgerechte, graslandbasierte regenerative Milch- und Rindfleischsysteme, die den Wettbewerb zwischen Lebens- und Futtermittelproduktion minimieren, zu einer ökologisch nachhaltigen Landnutzung beitragen können, ohne dabei die regionalen Ökosystemgrenzen zu überschreiten (Stolze et al. 2019)

Decoherence in a scalable adiabatic quantum computer

We consider the effects of decoherence on Landau-Zener crossings encountered in a large-scale adiabatic-quantum-computing setup. We analyze the dependence of the success probability, i.e. the probability for the system to end up in its new ground state, on the noise amplitude and correlation time. We determine the optimal sweep rate that is required to maximize the success probability. We then discuss the scaling of decoherence effects with increasing system size. We find that those effects can be important for large systems, even if they are small for each of the small building blocks.Comment: 6 pages (two-column), 1 figur

Spin Chains as Perfect Quantum State Mirrors

Quantum information transfer is an important part of quantum information processing. Several proposals for quantum information transfer along linear arrays of nearest-neighbor coupled qubits or spins were made recently. Perfect transfer was shown to exist in two models with specifically designed strongly inhomogeneous couplings. We show that perfect transfer occurs in an entire class of chains, including systems whose nearest-neighbor couplings vary only weakly along the chain. The key to these observations is the Jordan-Wigner mapping of spins to noninteracting lattice fermions which display perfectly periodic dynamics if the single-particle energy spectrum is appropriate. After a half-period of that dynamics any state is transformed into its mirror image with respect to the center of the chain. The absence of fermion interactions preserves these features at arbitrary temperature and allows for the transfer of nontrivially entangled states of several spins or qubits.Comment: Abstract extended, introduction shortened, some clarifications in the text, one new reference. Accepted by Phys. Rev. A (Rapid Communications

Quantum integrability and nonintegrability in the spin-boson model

We study the spectral properties of a spin-boson Hamiltonian that depends on two continuous parameters $0\leq\Lambda<\infty$ (interaction strength) and $0\leq\alpha\leq\pi/2$ (integrability switch). In the classical limit this system has two distinct integrable regimes, $\alpha=0$ and $\alpha=\pi/2$. For each integrable regime we can express the quantum Hamiltonian as a function of two action operators. Their eigenvalues (multiples of $\hbar$) are the natural quantum numbers for the complete level spectrum. This functional dependence cannot be extended into the nonintegrable regime $(0<\alpha<\pi/2)$. Here level crossings are prohibited and the level spectrum is naturally described by a single (energy sorting) quantum number. In consequence, the tracking of individual eigenstates along closed paths through both regimes leads to conflicting assignments of quantum numbers. This effect is a useful and reliable indicator of quantum chaos -- a diagnostic tool that is independent of any level-statistical analysis

Transcriptional networks specifying homeostatic and inflammatory programs of gene expression in human aortic endothelial cells.

Endothelial cells (ECs) are critical determinants of vascular homeostasis and inflammation, but transcriptional mechanisms specifying their identities and functional states remain poorly understood. Here, we report a genome-wide assessment of regulatory landscapes of primary human aortic endothelial cells (HAECs) under basal and activated conditions, enabling inference of transcription factor networks that direct homeostatic and pro-inflammatory programs. We demonstrate that 43% of detected enhancers are EC-specific and contain SNPs associated to cardiovascular disease and hypertension. We provide evidence that AP1, ETS, and GATA transcription factors play key roles in HAEC transcription by co-binding enhancers associated with EC-specific genes. We further demonstrate that exposure of HAECs to oxidized phospholipids or pro-inflammatory cytokines results in signal-specific alterations in enhancer landscapes and associate with coordinated binding of CEBPD, IRF1, and NFκB. Collectively, these findings identify cis-regulatory elements and corresponding trans-acting factors that contribute to EC identity and their specific responses to pro-inflammatory stimuli

Organic Action Plans. Development, implementation and evaluation. A resource manual for the organic food and farming sector

In 2004, the European Action Plan for Organic Food and Farming was launched. Many European countries have also developed national Organic Action Plans to promote and support organic agriculture. As part of the EU funded ORGAP project (“European Action Plan of Organic Food and Farming - Development of criteria and procedures for the evaluation of the EU Action Plan for Organic Agriculture”) a toolbox to evaluate and monitor the implementation of national and European Action Plans has been developed. In order to communicate the results of this project as widely as possible, a practical manual for initiating and evaluating Organic Action Plans has been produced. This manual has been created to inspire the people, organisations and institutions involved, or with an interest, in the organic food and farming sector to engage in the initiation, review, revision and renewal of regional, national and European Organic Action Plans. The objectives of the manual are to provide: • a tool for stakeholder involvement in future Action Plan development and implementation processes at EU, national and regional level • a guide to the use of the Organic Action Plan Evaluation Toolbox (ORGAPET) developed through the project The manual summarises the key lessons learnt from more than 10 years experience of development, implementation and evaluation of Organic Action Plans throughout Europe. The Organic Action Plan Evaluation Toolbox (ORGAPET), which includes comprehensive information to support the Organic Action Plan development and evaluation process is included with the manual as a CD-ROM, and is also accessible on-line at www.orgap.org/orgapet. The ORGAP website www.orgap.org provides a further information on the project and the European and national organic action plans. Published by: Research Institute of Organic Agriculture (FiBL), Frick, Switzerland; IFOAM EU Group, Brussels Table of contents Foreword 1 1 Introduction 3 1.1 About this manual 3 1.2 Organic farming – origins, definition & principles 6 1.3 Development of organic food & farming in Europe 8 1.3.1 Organic food and farming regulation in Europe 10 1.3.2 Policy support for organic food and farming in Europe 11 2 Organic Action Plans – what are they about? 16 2.1 Why Organic Action Plans? 16 2.2 European Organic Action Plan 21 2.3 Overview of national and regional Organic Action Plans 23 3 Planning and implementing Organic Action Plans 28 3.1 Policy development 28 3.2 Defining organic sector development needs and potential 31 3.3 Defining policy goals and objectives 34 3.4 Involving stakeholders 40 3.4.1 The case for stakeholder involvement 40 3.4.2 Identifying relevant stakeholders 42 3.4.3 Participatory approaches for stakeholders involvement 44 3.5 Decision making: selecting, integrating and prioritising relevant measures 46 3.5.1 Deciding on policy instruments and action points 47 3.5.2 Priorities for action – allocating resources 50 3.6 Implementing Organic Action Plans 52 3.7 Including monitoring and evaluation of Organic Action Plans from outset 56 3.8 Managing communication 58 3.9 Development of Action Plans in countries that joined the EU in 2004 and later 59 4 Evaluating Organic Action Plans 61 4.1 Principles of evaluation 61 4.2 Conducting an evaluation 64 4.3 Evaluating Action Plan design and implementation 70 4.3.1 Evaluating programme design and implementation processes 70 4.3.2 Evaluating programme coherence 72 4.3.3 Evaluating stakeholder involvement 74 4.4 Evaluating Action Plan effects 78 4.4.1 Developing and using indicators for evaluation 78 4.5 Overall evaluation of Organic Action Plans – judging success 85 4.6 Evaluating Action Plans in countries that joined the EU in 2004 and later 89 5 Organic Action Plans – the Golden Rules 91 5.1 Key elements of Organic Action Plan development 91 5.2 The Golden rules for Organic Action Plan 93 References 96 Annex Detailed synopsis of ORGAPET 10

Impurity spin relaxation in S=1/2 XX chains

Dynamic autocorrelations $$ (\alpha=x,z) of an isolated impurity spin in a S=1/2 XX chain are calculated. The impurity spin, defined by a local change in the nearest-neighbor coupling, is either in the bulk or at the boundary of the open-ended chain. The exact numerical calculation of the correlations employs the Jordan-Wigner mapping from spin operators to Fermi operators; effects of finite system size can be eliminated. Two distinct temperature regimes are observed in the long-time asymptotic behavior. At T=0 only power laws are present. At high T the x correlation decays exponentially (except at short times) while the z correlation still shows an asymptotic power law (different from the one at T=0) after an intermediate exponential phase. The boundary impurity correlations follow power laws at all T. The power laws for the z correlation and the boundary correlations can be deduced from the impurity-induced changes in the properties of the Jordan-Wigner fermion states.Comment: Final version to be published in Phys. Rev. B. Three references added, extended discussion of relation to previous wor

Writing electronic ferromagnetic states in a high-temperature paramagnetic nuclear spin system

In this paper we use the Nuclear Magnetic Resonance (NMR) to write eletronic states of a ferromagnetic system into a high-temperature paramagnetic nuclear spins. Through the control of phase and duration of radiofrequency pulses we set the NMR density matrix populations, and apply the technique of quantum state tomography to experimentally obtain the matrix elements of the system, from which we calculate the temperature dependence of magnetization for different magnetic fields. The effects of the variation of temperature and magnetic field over the populations can be mapped in the angles of spins rotations, carried out by the RF pulses. The experimental results are compared to the Brillouin functions of ferromagnetic ordered systems in the mean field approximation for two cases: the mean field is given by (i) $B=B_0+\lambda M$ and (ii) $B=B_0+\lambda M + \lambda^\prime M^3$, where $B_0$ is the external magnetic field, and $\lambda, \lambda^\prime$ are mean field parameters. The first case exhibits second order transition, whereas the second case has first order transition with temperature hysteresis. The NMR simulations are in good agreement with the magnetic predictions