Derived invariance of the Tamarkin--Tsygan calculus of an algebra

We prove that derived equivalent algebras have isomorphic differential calculi in the sense of Tamarkin--Tsygan.Comment: 7 page

Derived invariance of the cap product in Hochschild theory

We prove derived invariance of the cap product for associative algebras projective over a commutative ring.Comment: 4 page

Extra-powerful on the visuo-perceptual space, but variable on the number space: Different effects of optokinetic stimulation in neglect patients

We studied the effects of optokinetic stimulation (OKS; leftward, rightward, control) on the visuo-perceptual and number space, in the same sample, during line bisection and mental number interval bisection tasks. To this end, we tested six patients with right-hemisphere damage and neglect, six patients with right-hemisphere damage but without neglect, and six neurologically healthy participants. In patients with neglect, we found a strong effect of leftward OKS on line bisection, but not on mental number interval bisection. We suggest that OKS influences the number space only under specific conditions

Proposal of a methodology for the sustainability assessment of cryptocurrencies

As cryptocurrencies are becoming more and more widespread and their power consumption has caught the attention of the public, it seems worthwhile to investigate their effects on the environment, economy and society. In the scientific literature, a clear focus on the high power consumption of the market-dominating Bitcoin can be seen in the sustainability assessment of cryptocurrencies. In order to build a comprehensive understanding of cryptocurrencies’ sustainability other aspects should be considered as well instead of narrowing down the scope of analysis to power consumption. Therefore, a holistic definition of sustainability in the context of cryptocurrencies is proposed. Building upon this definition a methodology for assessing a cryptocurrencies’ sustainability is derived in this paper and subsequently applied to ten cryptocurrencies

Pelargonic acid for weed control in onions: factors affecting selectivity

In Zwiebeln (Allium cepa) sind nur wenige Herbizide bewilligt. Aufgrund ihrer aufrecht stehenden Blätter und aufrechten Pflanzenarchitektur bleibt an den Zwiebelpflanzen nach der Applikation weniger Herbizid haften als an breitblättrigen Unkräutern. Außerdem haben sie eine dickere Cuticula. Diese Unterschiede machen einen selektiven Einsatz von Pelargonsäure in Zwiebeln möglich. Das Hauptziel dieser Arbeit war, verträgliche Aufwandmengen für unterschiedliche Wachstumsstadien zu bestimmen. In 5 Feldversuchen wurden 3 Pelargonsäure-haltige Produkte (1 SL- und 2 EC-Formulierungen) mit einem Logsprayer appliziert. Zwischen 0 und 56 kg Aktivsubstanz (a.s.) ha-1 wurden appliziert. Die Zwiebelstadien reichten von BBCH 10 bis 16. Die Verträglichkeit wurde visuell bonitiert. Die Produkte waren verträglich mit jeweils 7.2 und 8.3 ka a.s. ha-1 (BBCH 10-11), 6.1 und 8.9 ka a.s. ha-1 (BBCH 11-12), 8.5 und 20.7 ka a.s. ha-1 (BBCH 13) sowie mit 6.3 und 9.0 kg a.s. ha-1 (BBCH 14-16) für die SL- bzw. die EC-Formulierungen. Die Verträglichkeit hing vom Kulturstadium und den Wetterbedingungen ab. Wichtig für einen selektiven Einsatz in Zwiebeln ist eine intakte Wachsschicht, was eine regenfreie, lichtintensive Periode vor der Applikation bedingt. Pelargonsäure könnte eine wirksame Komponente für eine nachhaltige Unkrautbekämpfung in Zwiebeln werden. Aufgrund der reinen Blattwirkung müssen kleine Unkräuter behandelt werden und es sind mehrere Applikationen notwendig.In onions (Allium cepa) few herbicides are registered. Due to their erect leaf and plant structure, onions retain less herbicide after spraying than broadleaved weeds. Further, onion plants have a thicker plant cuticle. These differences allow a selective use of pelargonic acid in onions. The main aim of this study was to determine the selective dose at different crop growth stages. Five field trials were carried out. Three pelargonic acid containing products (1 SL- and 2 EC-formulations) were applied with a logarithmic sprayer. Dose range was 0 to 56 kg active substance (a.s.) ha-1. The growth stage varied between BBCH 10 and 16. Selectivity was rated visually. The products were selective at 7.2 and 8.3 kg a.s. ha-1 (BBCH 10-11), 6.1 and 8.9 kg a.s. ha-1 (BBCH 11-12), 8.5 and 20.7 kg a.s. ha-1 (BBCH 13) and 6.3 and 9.0 kg a.s. ha-1 (BBCH 14-16) for the SL- and EC-products respectively. Selectivity depended on growth stage and weather conditions. Important for selectivity is an intact cuticle, a rain-free, light-intense period before application. Pelargonic acid could become a component for sustainable weed control in onions. Due to its foliar activity, small weeds need to be targeted and several passes are required

Modification of spintronic terahertz emitter performance through defect engineering

Spintronic ferromagnetic/non-magnetic heterostructures are novel sources for the generation of THz radiation based on spin-to-charge conversion in the layers. The key technological and scientific challenge of THz spintronic emitters is to increase their intensity and frequency bandwidth. Our work reveals the factors to engineer spintronic Terahertz generation by introducing the scattering lifetime and the interface transmission for spin polarized, non-equilibrium electrons. We clarify the influence of the electron-defect scattering lifetime on the spectral shape and the interface transmission on the THz amplitude, and how this is linked to structural defects of bilayer emitters. The results of our study define a roadmap of the properties of emitted as well as detected THz-pulse shapes and spectra that is essential for future applications of metallic spintronic THz emitters.Comment: 33 pages, 13 figure

The Mobile Csound platform

This article discusses the development of the Mobile Csound Platform (MCP), a group of related projects that aim to provide support for sound synthesis and processing under various new environments. Csound is itself an established computer music system, derived from the MUSIC N paradigm, which allows various uses and applications through its Application Programming Interface (API). In the article, we discuss these uses and introduce the three environments under which the MCP is being run. The projects designed for mobile operating systems, iOS and Android, are discussed from a technical point of view, exploring the development of the CsoundObj toolkit, which is built on top of the Csound host API. In addition to these, we also discuss a web deployment solution, which allows for Csound applications on desktop operating systems without prior installation. The article concludes with some notes on future developments

Prototyping of Ubiquitous Music Ecosystems

This paper focuses the prototyping stage of the design cycle of ubiquitous music (ubimus) ecosystems. We present three case studies of prototype deployments for creative musical activities. The first case exemplifies a ubimus system for synchronous musical interaction using a hybrid Java-JavaScript development platform, mow3s-ecolab. The second case study makes use of the HTML5 Web Audio library to implement a loop-based sequencer. The third prototype - an HTML-controlled sine-wave oscillator - provides an example of using the Chromium open-source sand-boxing technology Portable Native Client (PNaCl) platform for audio programming on the web. This new approach involved porting the Csound language and audio engine to the PNaCl web technology. The Csound PNaCl environment provides programming tools for ubiquitous audio applications that go beyond the HTML5 Web Audio framework. The limitations and advantages of the three approaches proposed - the hybrid Java/- JavaScript environment, the HTML5 audio library and the Csound PNaCl infrastructure - are discussed in the context of rapid prototyping of ubimus ecosystems

The Mobile Csound platform

This article discusses the development of the Mobile Csound Platform (MCP), a group of related projects that aim to provide support for sound synthesis and processing under various new environments. Csound is itself an established computer music system, derived from the MUSIC N paradigm, which allows various uses and applications through its Application Programming Interface (API). In the article, we discuss these uses and introduce the three environments under which the MCP is being run. The projects designed for mobile operating systems, iOS and Android, are discussed from a technical point of view, exploring the development of the CsoundObj toolkit, which is built on top of the Csound host API. In addition to these, we also discuss a web deployment solution, which allows for Csound applications on desktop operating systems without prior installation. The article concludes with some notes on future developments

The Mobile Csound platform

This article discusses the development of the Mobile Csound Platform (MCP), a group of related projects that aim to provide support for sound synthesis and processing under various new environments. Csound is itself an established computer music system, derived from the MUSIC N paradigm, which allows various uses and applications through its Application Programming Interface (API). In the article, we discuss these uses and introduce the three environments under which the MCP is being run. The projects designed for mobile operating systems, iOS and Android, are discussed from a technical point of view, exploring the development of the CsoundObj toolkit, which is built on top of the Csound host API. In addition to these, we also discuss a web deployment solution, which allows for Csound applications on desktop operating systems without prior installation. The article concludes with some notes on future developments