57,706 Works

Phylum-wide comparative genomics unravel the diversity of secondary metabolism in Cyanobacteria

Alexandra Calteau, David P. Fewer, Amel Latifi, Thérèse Coursin, Thierry Laurent, Jouni Jokela, Cheryl A. Kerfeld, Kaarina Sivonen, Jörn Piel & Muriel Gugger
Background Cyanobacteria are an ancient lineage of photosynthetic bacteria from which hundreds of natural products have been described, including many notorious toxins but also potent natural products of interest to the pharmaceutical and biotechnological industries. Many of these compounds are the products of non-ribosomal peptide synthetase (NRPS) or polyketide synthase (PKS) pathways. However, current understanding of the diversification of these pathways is largely based on the chemical structure of the bioactive compounds, while the evolutionary...

Contextuality without nonlocality in a superconducting quantum system

Markus Jerger, Yarema Reshitnyk, Markus Oppliger, Anton Potocnik, Mintu Mondal, Andreas Wallraff, Kenneth Goodenough, Stephanie Wehner, Kristinn Juliusson, Nathan K. Langford & Arkady Fedorov
Classical realism demands that system properties exist independently of whether they are measured, while noncontextuality demands that the results of measurements do not depend on what other measurements are performed in conjunction with them. The Bell–Kochen–Specker theorem states that noncontextual realism cannot reproduce the measurement statistics of a single three-level quantum system (qutrit). Noncontextual realistic models may thus be tested using a single qutrit without relying on the notion of quantum entanglement in contrast to...

Drosophila suzukii in Swiss cherry production – Data from a survey on risk management strategies in 2017

Ladina Knapp, Esther Bravin, Manuela Meraner & Robert Finger
The here presented dataset is based on a survey that was conducted with Swiss cherry growers with the specific aim to identify risk management strategies taken in response to Drosophila suzukii as well as to survey perceived infestation levels and harvest losses. The survey was conducted from mid-August 2017 to mid-September 2017 and questions were related to the cherry harvest of 2017 with in total 94 responses. Farm and farmers’ characteristics were collected and risk...

Drosophila suzukii in Swiss grape production – Data from a survey on risk management strategies in 2017

Ladina Knapp, Esther Bravin & Robert Finger
The here presented dataset is based on a survey that was conducted with Swiss grape growers with the specific aim to identify risk management strategies taken in response to Drosophila suzukii as well as to survey perceived infestation levels and harvest losses. The survey was conducted in December 2017 and questions were related to the grape harvest of 2017 with in total 331 responses. Farm and farmers’ characteristics were collected and risk preferences elicited.

Reducing micronutrient deficiencies in Pakistani children: are subsidies on fortified complementary foods cost-effective?

Simon Wieser, Beatrice Brunner, Christina Tzogiou, Rafael Plessow, Michael B. Zimmermann, Jessica Farebrother, Sajid Soofi, Zaid Bhatti, Imran Ahmed & Zulfiqar A. Bhutta
Objective To estimate the cost-effectiveness of price subsidies on fortified packaged complementary foods (FPCF) in reducing iodine deficiency, iron-deficiency anaemia and Vitamin A deficiency in Pakistani children.Design The study proceeded in three steps: (i) we determined the current lifetime costs of the three micronutrient deficiencies with a health economic model; (ii) we assessed the price sensitivity of demand for FPCF with a market survey in two Pakistani districts; (iii) we combined the findings of the...

Sustainability Learning Labs in Small Island Developing States: A Case Study of the Seychelles

Pius Krütli, Christian Pohl & Michael Stauffacher
In the discussion of real-world laboratories, the teaching component is widely lacking. We address this by introducing a prototype of a sustainability learning lab (SLL) in the global South using a case study of the Seychelles as an example. In 2015 the Transdisciplinarity Lab (TdLab) of ETH Zurich initiated a long-term collaboration with the University of Seychelles (UniSey) and the Ministry of Environment, Energy and Climate Change (MEECC). Teaching activities include transdisciplinary case studies (tdCS)...

On the Approximation of Constrained Linear Quadratic Regulator Problems and their Application to Model Predictive Control

Michael Muehlebach & Raffaello D'Andrea
This article is concerned with the approximation of constrained continuous-time linear quadratic regulator problems, which are, for example, encountered in model predictive control. By representing input and state trajectories using basis functions, the underlying infinite-dimensional optimal control problems are reduced to convex finite-dimensional optimization problems that can be solved efficiently. The article quantifies the suboptimality and establishes convergence of the obtained approximations. The results are applied in the context of model predictive control. In particular,...

Supersonic flows with bow shocks visualization with transversal dicharges

I. Znamenskaya, A.E. Ieshkin, V.S. Chernysh & I.E. Ivanov
Proceedings 18th International Symposium on Flow Visualization

Energy-Based Stabilization of Network Flows in Multi-Machine Power Systems

Catalin Arghir & Florian Dörfler
This paper considers the network flow stabilization problem in power systems and adopts an output regulation viewpoint. Building upon the structure of a heterogeneous port-Hamiltonian model, we integrate network aspects and develop a systematic control design procedure. First, the passive output is selected to encode two objectives: consensus in angular velocity and constant excitation current. Second, the non-Euclidean nature of the angle variable reveals the geometry of a suitable target set, which is compact and...

Chiral Discrimination through Bielliptical High-Harmonic Spectroscopy

Denitsa Baykusheva & Hans Jakob Wörner
Molecular chirality plays an essential role in most biochemical processes. The observation and quantification of chirality-sensitive signals, however, remains extremely challenging, especially on ultrafast timescales and in dilute media. Here, we describe the experimental realization of an all-optical and ultrafast scheme for detecting chiral dynamics in molecules. This technique is based on high-harmonic generation by a combination of two-color counterrotating femtosecond laser pulses with polarization states tunable from linear to circular. We demonstrate two different...

Studying catchment storm response using event and pre-event water volumes as fractions of precipitation rather than discharge

Jana Freiin Von Freyberg, Bjørn Studer, Michael Rinderer & James W. Kirchner
Hydrology and Earth System Sciences Discussions

Parliaments in International Politics

Jofre Rocabert
The contestation of international decision-making is one of the most pressing problems affecting both national institutions and international organizations. As the main arenas of communal decision-making, the involvement of parliaments may be a solution to the legitimacy shortages of international decisions and the institutional paralysis that this may ensue. This dissertation examines two distinct processes that reveal the current place of parliaments in international politics. In the first part of my dissertation, I focus on...

Situazione fitosanitaria dei boschi 2001

Franz Meier, Roland Engesser, Beat Forster & Oswald Odermatt
Situazione fitosanitaria dei boschi

Situazione fitosanitaria dei boschi 2013

Franz Meier, Roland Engesser, Beat Forster, Oswald Odermatt & Alexander Angst
WSL Berichte, 14

Growth of Epithelial Organoids in a Defined Hydrogel

Nicolas Broguiere, Luca Isenmann, Christian Hirt, Till Ringel, Silja Placzek, Emma Cavalli, Femke Ringnalda, Lukas Villiger, Richard Züllig, Roger Lehmann, Gerhard Rogler, Markus H. Heim, Julia Schüler, Marcy Zenobi-Wong & Gerald Schwank
Epithelial organoids are simplified models of organs grown in vitro from embryonic and adult stem cells. They are widely used to study organ development and disease, and enable drug screening in patient‐derived primary tissues. Current protocols, however, rely on animal‐ and tumor‐derived basement membrane extract (BME) as a 3D scaffold, which limits possible applications in regenerative medicine. This prompted us to study how organoids interact with their matrix, and to develop a well‐defined hydrogel that...

Situazione fitosanitaria dei boschi 2008

Franz Meier, Roland Engesser, Beat Forster, Oswald Odermatt & Alexander Angst
Situazione fitosanitaria dei boschi

Situazione fitosanitaria dei boschi 2009

Franz Meier, Roland Engesser, Beat Forster, Oswald Odermatt & Alexander Angst
Situazione fitosanitaria dei boschi

“Brick-topia”, the thin-tile vaulted pavilion

David López López, Marta Domènech Rodríguez & Mariana P. Fernández
The project “Brick-topia” was based on a combination of the latest structural analysis and form-finding computational tools with traditional, cheap and effective construction techniques. It is the result of innovation to fight against budget and time. The initial budget was 3000 euros and only seven weeks was the time to look for sponsors, design the pavilion, plan the construction phases and build it. The whole process of designing, decision on the materials, structural analysis and...

Situazione fitosanitaria dei boschi 2010

Franz Meier, Roland Engesser, Beat Forster, Oswald Odermatt & Alexander Angst
Situazione fitosanitaria dei boschi

Efficient laboratory evolution of computationally designed enzymes with low starting activities using fluorescence-activated droplet sorting

Richard Obexer, Moritz Pott, Cathleen Zeymer, Andrew D. Griffiths & Donald Hilvert
Protein Engineering, Design & Selection, 29 (9)

Multiple peer effects in the diffusion of innovations on social networks: a simulation study

Hang Xiong, Puqing Wang & Georgiy Bobashev
Peer effects in innovation adoption decisions have been extensively studied. However, the underlying mechanisms of peer effects are generally not explicitly accounted for. Gaps in this knowledge could lead to misestimation of peer effects and inefficient interventions. This study examined the role of two mechanisms—sharing experiences (namely, experience effect) and externalities—in the adoption of an agricultural innovation. By referring to the diffusion process of a new crop in Chinese villages, we developed a simulation model...

Unique Sink Orientations: Complexity, Structure and Algorithms

Antonis Thomas

Die lagerlose Pumpe für hohe Fluidtemperaturen

Tobias Wellerdieck
Bearingless motors consist of a drive system with an integrated magnetic bearing and are used in centrifugal pumps for high purity applications. The machine is constructed without the use of a drive shaft, dynamic seals, and conventional mechanical bearings, since the rotor is levitated in a magnetic field. This allows for a wear-free operation and prevents the contamination of process fluids. Bearingless pumps are employed in wet chemical etching processes in the semiconductor industry, since...

Complex fluid-fluid interfaces: the interplay between interfacial tension and viscoelasticity

Martina Pepicelli
ISBN:9783906916064

Indexical Architecture: Prominent positions, applications and the Web

Jorge Orozco Esquivel

Registration Year

  • 2020
    4,608
  • 2019
    9,538
  • 2018
    8,024
  • 2017
    3,194
  • 2016
    1,796
  • 2015
    1,220
  • 2014
    1,505
  • 2013
    1,331
  • 2012
    1,481
  • 2011
    1,512

Resource Types

  • Text
    56,649
  • Event
    462
  • Collection
    442
  • Audiovisual
    47
  • Image
    27
  • Model
    23
  • Other
    16
  • Software
    8
  • Sound
    2